ext4 状态查看-待完善说明_lwext4-优快云博客

博客围绕SanDisk 8G SD卡多进程sync卡住时ext4状态查看展开，介绍了MEMINFO、VMSTAT等参数查看，还提及挂载参数查看，重点讲解了ext4文件系统group块组，每个块组对应ext4_buddy，以及块组数量分配等内容，并给出源码分析参考链接。

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SanDisk 8G SD卡多进程sync卡住时ext4状态查看，剩余容量一半开始删除就文件。

MEMINFO

~ # cat /proc/meminfo 
MemTotal:          77616 kB
MemFree:            8024 kB
Buffers:            1004 kB
Cached:            38236 kB
SwapCached:            0 kB
Active:             9596 kB
Inactive:          35644 kB
Active(anon):       6004 kB
Inactive(anon):      260 kB
Active(file):       3592 kB
Inactive(file):    35384 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:             0 kB
HighFree:              0 kB
LowTotal:          77616 kB
LowFree:            8024 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:              1772 kB
Writeback:             4 kB
AnonPages:          6024 kB
Mapped:             1612 kB
Shmem:               264 kB
Slab:              13068 kB
SReclaimable:       9680 kB
SUnreclaim:         3388 kB
KernelStack:         952 kB
PageTables:          444 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:       38808 kB
Committed_AS:      24364 kB
VmallocTotal:     942080 kB
VmallocUsed:       48420 kB
VmallocChunk:     877396 kB

VMSTAT

~ # cat /proc/vmstat 
nr_free_pages 2006
nr_inactive_anon 65
nr_active_anon 1501
nr_inactive_file 8846
nr_active_file 898
nr_unevictable 0
nr_mlock 0
nr_anon_pages 1506
nr_mapped 403
nr_file_pages 9810
nr_dirty 443
nr_writeback 1
nr_slab_reclaimable 2420
nr_slab_unreclaimable 847
nr_page_table_pages 111
nr_kernel_stack 119
nr_unstable 0
nr_bounce 0
nr_vmscan_write 0
nr_vmscan_immediate_reclaim 0
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 66
nr_dirtied 1810401
nr_written 1809957
nr_anon_transparent_hugepages 0
nr_free_cma 0
nr_dirty_threshold 2211
nr_dirty_background_threshold 1105

什么参数

~ # ls /sys/fs/ext4/sdb1/
delayed_allocation_blocks  max_writeback_mb_bump      mb_stats
extent_max_zeroout_kb      mb_group_prealloc          mb_stream_req
inode_goal                 mb_max_to_scan             reserved_clusters
inode_readahead_blks       mb_min_to_scan             session_write_kbytes
lifetime_write_kbytes      mb_order2_req              trigger_fs_error

这些参数怎么看？

挂载参数

查看挂载

/dev/sdb1 on /mnt type ext4 (rw,relatime,data=ordered)
/dev/sdb1              7504760   3392548   3707940  48% /mnt

查看参数

~ # cat /proc/fs/ext4/sdb1/options 
rw
delalloc
barrier
user_xattr
acl
resuid=0
resgid=0
errors=continue
commit=5
min_batch_time=0
max_batch_time=15000
stripe=0
data=ordered
inode_readahead_blks=32
init_itable=10
max_dir_size_kb=0

查看ext4文件系统group块组

每个group块组对应一个ext4_buddy，这里的buddy index是13，在ext4中每个group块组最多有32768即2^15个block，而ext4_buddy初始化时则将每个块组分成4个2^13的buddy组。

Blocks per group: 32768，32768=2^15，32768/4=8192=2^13，怎么对应下面图的呢？

源码分析参考链接：ext4 mballoc源代码分析来自于OenHan，链接为：http://oenhan.com/ext4-mballoc

~ # cat /proc/fs/ext4/sdb1/mb_groups 
#group: free  frags first [ 2^0   2^1   2^2   2^3   2^4   2^5   2^6   2^7   2^8   2^9   2^10  2^11  2^12  2^13  ]
#0    : 24159 1     8609  [ 1     1     1     1     1     0     1     0     0     1     1     1     1     2     ]
#1    : 31686 4     480   [ 0     1     1     0     2     1     0     1     1     1     2     2     2     2     ]
#2    : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#3    : 32293 1     475   [ 1     0     1     0     0     1     0     0     0     1     1     1     1     3     ]
#4    : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#5    : 32293 1     475   [ 1     0     1     0     0     1     0     0     0     1     1     1     1     3     ]
#6    : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#7    : 32293 1     475   [ 1     0     1     0     0     1     0     0     0     1     1     1     1     3     ]
#8    : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#9    : 32293 1     475   [ 1     0     1     0     0     1     0     0     0     1     1     1     1     3     ]
#10   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#11   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#12   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#13   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#14   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#15   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#16   : 24640 1     8128  [ 0     0     0     0     0     0     1     0     0     0     0     0     0     3     ]
#17   : 0     0     32768 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#18   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#19   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#20   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#21   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#22   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#23   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#24   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#25   : 32293 1     475   [ 1     0     1     0     0     1     0     0     0     1     1     1     1     3     ]
#26   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#27   : 32293 1     475   [ 1     0     1     0     0     1     0     0     0     1     1     1     1     3     ]
#28   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#29   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#30   : 32768 1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     0     4     ]
#31   : 2048  1     0     [ 0     0     0     0     0     0     0     0     0     0     0     1     0     0     ]
#32   : 24640 1     8128  [ 0     0     0     0     0     0     1     0     0     0     0     0     0     3     ]
#33   : 0     0     12288 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#34   : 1024  3     23040 [ 0     0     0     0     0     0     0     2     1     1     0     0     0     0     ]
#35   : 1024  1     2048  [ 0     0     0     0     0     0     0     0     0     0     1     0     0     0     ]
#36   : 0     0     11264 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#37   : 0     0     2048  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#38   : 0     0     32768 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#39   : 1024  6     4128  [ 0     0     0     0     0     2     1     1     1     1     0     0     0     0     ]
#40   : 0     0     2048  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#41   : 0     0     12288 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#42   : 1024  1     2048  [ 0     0     0     0     0     0     0     0     0     0     1     0     0     0     ]
#43   : 1024  4     8576  [ 0     0     0     0     0     0     0     2     1     1     0     0     0     0     ]
#44   : 0     0     14336 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#45   : 16    1     4096  [ 0     0     0     0     1     0     0     0     0     0     0     0     0     0     ]
#46   : 0     0     8192  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#47   : 0     0     4096  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#48   : 26672 3     12    [ 0     0     2     1     0     1     0     0     0     0     0     1     0     3     ]
#49   : 37    1     475   [ 1     0     1     0     0     1     0     0     0     0     0     0     0     0     ]
#50   : 512   1     2048  [ 0     0     0     0     0     0     0     0     0     1     0     0     0     0     ]
#51   : 0     0     4096  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#52   : 0     0     12288 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#53   : 0     0     2048  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#54   : 1024  3     8192  [ 0     0     0     0     0     0     0     2     1     1     0     0     0     0     ]
#55   : 0     0     4096  [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#56   : 0     0     10240 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#57   : 1024  1     2048  [ 0     0     0     0     0     0     0     0     0     0     1     0     0     0     ]
#58   : 0     0     32768 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#59   : 4096  1     0     [ 0     0     0     0     0     0     0     0     0     0     0     0     1     0     ]

此图也可用dumpe2fs工具查看

~ # dumpe2fs -g /dev/sdb1
dumpe2fs 1.44.5 (15-Dec-2018)

group:block:super:gdt:bbitmap:ibitmap:itable
0:0:0:1-1:475:491:507
1:32768:32768:32769-32769:476:492:1013
2:65536:-1:-1:477:493:1519
3:98304:98304:98305-98305:478:494:2025
4:131072:-1:-1:479:495:2531
5:163840:163840:163841-163841:480:496:3037
6:196608:-1:-1:481:497:3543
7:229376:229376:229377-229377:482:498:4049
8:262144:-1:-1:483:499:4555
9:294912:294912:294913-294913:484:500:5061
10:327680:-1:-1:485:501:5567
11:360448:-1:-1:486:502:6073
12:393216:-1:-1:487:503:6579
13:425984:-1:-1:488:504:7085
14:458752:-1:-1:489:505:7591
15:491520:-1:-1:490:506:8097
16:524288:-1:-1:524288:524304:524320
17:557056:-1:-1:524289:524305:524826
18:589824:-1:-1:524290:524306:525332
19:622592:-1:-1:524291:524307:525838
20:655360:-1:-1:524292:524308:526344
21:688128:-1:-1:524293:524309:526850
22:720896:-1:-1:524294:524310:527356
23:753664:-1:-1:524295:524311:527862
24:786432:-1:-1:524296:524312:528368
25:819200:819200:819201-819201:524297:524313:528874
26:851968:-1:-1:524298:524314:529380
27:884736:884736:884737-884737:524299:524315:529886
28:917504:-1:-1:524300:524316:530392
29:950272:-1:-1:524301:524317:530898
30:983040:-1:-1:524302:524318:531404
31:1015808:-1:-1:524303:524319:531910
32:1048576:-1:-1:1048576:1048592:1048608
33:1081344:-1:-1:1048577:1048593:1049114
34:1114112:-1:-1:1048578:1048594:1049620
35:1146880:-1:-1:1048579:1048595:1050126
36:1179648:-1:-1:1048580:1048596:1050632
37:1212416:-1:-1:1048581:1048597:1051138
38:1245184:-1:-1:1048582:1048598:1051644
39:1277952:-1:-1:1048583:1048599:1052150
40:1310720:-1:-1:1048584:1048600:1052656
41:1343488:-1:-1:1048585:1048601:1053162
42:1376256:-1:-1:1048586:1048602:1053668
43:1409024:-1:-1:1048587:1048603:1054174
44:1441792:-1:-1:1048588:1048604:1054680
45:1474560:-1:-1:1048589:1048605:1055186
46:1507328:-1:-1:1048590:1048606:1055692
47:1540096:-1:-1:1048591:1048607:1056198
48:1572864:-1:-1:1572864:1572880:1572896
49:1605632:1605632:1605633-1605633:1572865:1572881:1573402
50:1638400:-1:-1:1572866:1572882:1573908
51:1671168:-1:-1:1572867:1572883:1574414
52:1703936:-1:-1:1572868:1572884:1574920
53:1736704:-1:-1:1572869:1572885:1575426
54:1769472:-1:-1:1572870:1572886:1575932
55:1802240:-1:-1:1572871:1572887:1576438
56:1835008:-1:-1:1572872:1572888:1576944
57:1867776:-1:-1:1572873:1572889:1577450
58:1900544:-1:-1:1572874:1572890:1577956
59:1933312:-1:-1:1572875:1572891:1578462

Group 0: (Blocks 0-32767) csum 0x3e52 [ITABLE_ZEROED]
  Primary superblock at 0, Group descriptors at 1-1
  Reserved GDT blocks at 2-474
  Block bitmap at 475 (+475)
  Inode bitmap at 491 (+491)
  Inode table at 507-1012 (+507)
  24159 free blocks, 7878 free inodes, 2 directories, 7860 unused inodes
  Free blocks: 8609-32767
  Free inodes: 215-232, 237-8096
Group 1: (Blocks 32768-65535) csum 0x2ba2 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 32768, Group descriptors at 32769-32769
  Reserved GDT blocks at 32770-33242
  Block bitmap at 476 (bg #0 + 476)
  Inode bitmap at 492 (bg #0 + 492)
  Inode table at 1013-1518 (bg #0 + 1013)
  32182 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 33296-44159, 44186-44223, 44240-44271, 44288-65535
  Free inodes: 8097-16192
Group 2: (Blocks 65536-98303) csum 0x2910 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 477 (bg #0 + 477)
  Inode bitmap at 493 (bg #0 + 493)
  Inode table at 1519-2024 (bg #0 + 1519)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 65536-98303
  Free inodes: 16193-24288
Group 3: (Blocks 98304-131071) csum 0xebe7 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 98304, Group descriptors at 98305-98305
  Reserved GDT blocks at 98306-98778
  Block bitmap at 478 (bg #0 + 478)
  Inode bitmap at 494 (bg #0 + 494)
  Inode table at 2025-2530 (bg #0 + 2025)
  32293 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 98779-131071
  Free inodes: 24289-32384
Group 4: (Blocks 131072-163839) csum 0x41e1 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 479 (bg #0 + 479)
  Inode bitmap at 495 (bg #0 + 495)
  Inode table at 2531-3036 (bg #0 + 2531)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 131072-163839
  Free inodes: 32385-40480
Group 5: (Blocks 163840-196607) csum 0x8d3a [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 163840, Group descriptors at 163841-163841
  Reserved GDT blocks at 163842-164314
  Block bitmap at 480 (bg #0 + 480)
  Inode bitmap at 496 (bg #0 + 496)
  Inode table at 3037-3542 (bg #0 + 3037)
  32293 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 164315-196607
  Free inodes: 40481-48576
Group 6: (Blocks 196608-229375) csum 0x1bb4 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 481 (bg #0 + 481)
  Inode bitmap at 497 (bg #0 + 497)
  Inode table at 3543-4048 (bg #0 + 3543)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 196608-229375
  Free inodes: 48577-56672
Group 7: (Blocks 229376-262143) csum 0xd943 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 229376, Group descriptors at 229377-229377
  Reserved GDT blocks at 229378-229850
  Block bitmap at 482 (bg #0 + 482)
  Inode bitmap at 498 (bg #0 + 498)
  Inode table at 4049-4554 (bg #0 + 4049)
  32293 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 229851-262143
  Free inodes: 56673-64768
Group 8: (Blocks 262144-294911) csum 0x0744 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 483 (bg #0 + 483)
  Inode bitmap at 499 (bg #0 + 499)
  Inode table at 4555-5060 (bg #0 + 4555)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 262144-294911
  Free inodes: 64769-72864
Group 9: (Blocks 294912-327679) csum 0x5cd8 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 294912, Group descriptors at 294913-294913
  Reserved GDT blocks at 294914-295386
  Block bitmap at 484 (bg #0 + 484)
  Inode bitmap at 500 (bg #0 + 500)
  Inode table at 5061-5566 (bg #0 + 5061)
  32293 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 295387-327679
  Free inodes: 72865-80960
Group 10: (Blocks 327680-360447) csum 0xe921 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 485 (bg #0 + 485)
  Inode bitmap at 501 (bg #0 + 501)
  Inode table at 5567-6072 (bg #0 + 5567)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 327680-360447
  Free inodes: 80961-89056
Group 11: (Blocks 360448-393215) csum 0x7ced [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 486 (bg #0 + 486)
  Inode bitmap at 502 (bg #0 + 502)
  Inode table at 6073-6578 (bg #0 + 6073)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 360448-393215
  Free inodes: 89057-97152
Group 12: (Blocks 393216-425983) csum 0x81d0 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 487 (bg #0 + 487)
  Inode bitmap at 503 (bg #0 + 503)
  Inode table at 6579-7084 (bg #0 + 6579)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 393216-425983
  Free inodes: 97153-105248
Group 13: (Blocks 425984-458751) csum 0xffa2 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 488 (bg #0 + 488)
  Inode bitmap at 504 (bg #0 + 504)
  Inode table at 7085-7590 (bg #0 + 7085)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 425984-458751
  Free inodes: 105249-113344
Group 14: (Blocks 458752-491519) csum 0x3e17 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 489 (bg #0 + 489)
  Inode bitmap at 505 (bg #0 + 505)
  Inode table at 7591-8096 (bg #0 + 7591)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 458752-491519
  Free inodes: 113345-121440
Group 15: (Blocks 491520-524287) csum 0xabdb [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 490 (bg #0 + 490)
  Inode bitmap at 506 (bg #0 + 506)
  Inode table at 8097-8602 (bg #0 + 8097)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 491520-524287
  Free inodes: 121441-129536
Group 16: (Blocks 524288-557055) csum 0xbefa [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524288 (+0)
  Inode bitmap at 524304 (+16)
  Inode table at 524320-524825 (+32)
  24640 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 532416-557055
  Free inodes: 129537-137632
Group 17: (Blocks 557056-589823) csum 0xbc05 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524289 (bg #16 + 1)
  Inode bitmap at 524305 (bg #16 + 17)
  Inode table at 524826-525331 (bg #16 + 538)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 137633-145728
Group 18: (Blocks 589824-622591) csum 0x7965 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524290 (bg #16 + 2)
  Inode bitmap at 524306 (bg #16 + 18)
  Inode table at 525332-525837 (bg #16 + 1044)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 589824-622591
  Free inodes: 145729-153824
Group 19: (Blocks 622592-655359) csum 0xab85 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524291 (bg #16 + 3)
  Inode bitmap at 524307 (bg #16 + 19)
  Inode table at 525838-526343 (bg #16 + 1550)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 622592-655359
  Free inodes: 153825-161920
Group 20: (Blocks 655360-688127) csum 0x2367 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524292 (bg #16 + 4)
  Inode bitmap at 524308 (bg #16 + 20)
  Inode table at 526344-526849 (bg #16 + 2056)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 655360-688127
  Free inodes: 161921-170016
Group 21: (Blocks 688128-720895) csum 0xfc96 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524293 (bg #16 + 5)
  Inode bitmap at 524309 (bg #16 + 21)
  Inode table at 526850-527355 (bg #16 + 2562)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 688128-720895
  Free inodes: 170017-178112
Group 22: (Blocks 720896-753663) csum 0x2d1e [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524294 (bg #16 + 6)
  Inode bitmap at 524310 (bg #16 + 22)
  Inode table at 527356-527861 (bg #16 + 3068)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 720896-753663
  Free inodes: 178113-186208
Group 23: (Blocks 753664-786431) csum 0x76aa [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524295 (bg #16 + 7)
  Inode bitmap at 524311 (bg #16 + 23)
  Inode table at 527862-528367 (bg #16 + 3574)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 753664-786431
  Free inodes: 186209-194304
Group 24: (Blocks 786432-819199) csum 0xa542 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524296 (bg #16 + 8)
  Inode bitmap at 524312 (bg #16 + 24)
  Inode table at 528368-528873 (bg #16 + 4080)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 786432-819199
  Free inodes: 194305-202400
Group 25: (Blocks 819200-851967) csum 0x7d47 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 819200, Group descriptors at 819201-819201
  Reserved GDT blocks at 819202-819674
  Block bitmap at 524297 (bg #16 + 9)
  Inode bitmap at 524313 (bg #16 + 25)
  Inode table at 528874-529379 (bg #16 + 4586)
  32293 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 819675-851967
  Free inodes: 202401-210496
Group 26: (Blocks 851968-884735) csum 0x8338 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524298 (bg #16 + 10)
  Inode bitmap at 524314 (bg #16 + 26)
  Inode table at 529380-529885 (bg #16 + 5092)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 851968-884735
  Free inodes: 210497-218592
Group 27: (Blocks 884736-917503) csum 0x9884 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 884736, Group descriptors at 884737-884737
  Reserved GDT blocks at 884738-885210
  Block bitmap at 524299 (bg #16 + 11)
  Inode bitmap at 524315 (bg #16 + 27)
  Inode table at 529886-530391 (bg #16 + 5598)
  32293 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 885211-917503
  Free inodes: 218593-226688
Group 28: (Blocks 917504-950271) csum 0x8b91 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524300 (bg #16 + 12)
  Inode bitmap at 524316 (bg #16 + 28)
  Inode table at 530392-530897 (bg #16 + 6104)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 917504-950271
  Free inodes: 226689-234784
Group 29: (Blocks 950272-983039) csum 0x98ac [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524301 (bg #16 + 13)
  Inode bitmap at 524317 (bg #16 + 29)
  Inode table at 530898-531403 (bg #16 + 6610)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 950272-983039
  Free inodes: 234785-242880
Group 30: (Blocks 983040-1015807) csum 0x3cf9 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524302 (bg #16 + 14)
  Inode bitmap at 524318 (bg #16 + 30)
  Inode table at 531404-531909 (bg #16 + 7116)
  32768 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 983040-1015807
  Free inodes: 242881-250976
Group 31: (Blocks 1015808-1048575) csum 0x4dab [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 524303 (bg #16 + 15)
  Inode bitmap at 524319 (bg #16 + 31)
  Inode table at 531910-532415 (bg #16 + 7622)
  2048 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1015808-1017855
  Free inodes: 250977-259072
Group 32: (Blocks 1048576-1081343) csum 0x2bc0 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048576 (+0)
  Inode bitmap at 1048592 (+16)
  Inode table at 1048608-1049113 (+32)
  24640 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1056704-1081343
  Free inodes: 259073-267168
Group 33: (Blocks 1081344-1114111) csum 0x293f [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048577 (bg #32 + 1)
  Inode bitmap at 1048593 (bg #32 + 17)
  Inode table at 1049114-1049619 (bg #32 + 538)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 267169-275264
Group 34: (Blocks 1114112-1146879) csum 0xc57c [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048578 (bg #32 + 2)
  Inode bitmap at 1048594 (bg #32 + 18)
  Inode table at 1049620-1050125 (bg #32 + 1044)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1138560-1138687, 1139840-1140223, 1142272-1142783
  Free inodes: 275265-283360
Group 35: (Blocks 1146880-1179647) csum 0x179c [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048579 (bg #32 + 3)
  Inode bitmap at 1048595 (bg #32 + 19)
  Inode table at 1050126-1050631 (bg #32 + 1550)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1178624-1179647
  Free inodes: 283361-291456
Group 36: (Blocks 1179648-1212415) csum 0x5e3c [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048580 (bg #32 + 4)
  Inode bitmap at 1048596 (bg #32 + 20)
  Inode table at 1050632-1051137 (bg #32 + 2056)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 291457-299552
Group 37: (Blocks 1212416-1245183) csum 0x81cd [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048581 (bg #32 + 5)
  Inode bitmap at 1048597 (bg #32 + 21)
  Inode table at 1051138-1051643 (bg #32 + 2562)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 299553-307648
Group 38: (Blocks 1245184-1277951) csum 0x5045 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048582 (bg #32 + 6)
  Inode bitmap at 1048598 (bg #32 + 22)
  Inode table at 1051644-1052149 (bg #32 + 3068)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 307649-315744
Group 39: (Blocks 1277952-1310719) csum 0xcab3 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048583 (bg #32 + 7)
  Inode bitmap at 1048599 (bg #32 + 23)
  Inode table at 1052150-1052655 (bg #32 + 3574)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1282080-1282111, 1283616-1283647, 1288128-1288191, 1295232-1295359, 1299712-1299967, 1305088-1305599
  Free inodes: 315745-323840
Group 40: (Blocks 1310720-1343487) csum 0xd819 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048584 (bg #32 + 8)
  Inode bitmap at 1048600 (bg #32 + 24)
  Inode table at 1052656-1053161 (bg #32 + 4080)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 323841-331936
Group 41: (Blocks 1343488-1376255) csum 0x5727 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048585 (bg #32 + 9)
  Inode bitmap at 1048601 (bg #32 + 25)
  Inode table at 1053162-1053667 (bg #32 + 4586)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 331937-340032
Group 42: (Blocks 1376256-1409023) csum 0x3f21 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048586 (bg #32 + 10)
  Inode bitmap at 1048602 (bg #32 + 26)
  Inode table at 1053668-1054173 (bg #32 + 5092)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1401856-1402879
  Free inodes: 340033-348128
Group 43: (Blocks 1409024-1441791) csum 0x73a6 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048587 (bg #32 + 11)
  Inode bitmap at 1048603 (bg #32 + 27)
  Inode table at 1054174-1054679 (bg #32 + 5598)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1417600-1417727, 1418624-1418751, 1419008-1419263, 1421824-1422335
  Free inodes: 348129-356224
Group 44: (Blocks 1441792-1474559) csum 0xf6ca [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048588 (bg #32 + 12)
  Inode bitmap at 1048604 (bg #32 + 28)
  Inode table at 1054680-1055185 (bg #32 + 6104)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 356225-364320
Group 45: (Blocks 1474560-1507327) csum 0x20f3 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048589 (bg #32 + 13)
  Inode bitmap at 1048605 (bg #32 + 29)
  Inode table at 1055186-1055691 (bg #32 + 6610)
  16 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1500144-1500159
  Free inodes: 364321-372416
Group 46: (Blocks 1507328-1540095) csum 0x41a2 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048590 (bg #32 + 14)
  Inode bitmap at 1048606 (bg #32 + 30)
  Inode table at 1055692-1056197 (bg #32 + 7116)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 372417-380512
Group 47: (Blocks 1540096-1572863) csum 0x1a16 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1048591 (bg #32 + 15)
  Inode bitmap at 1048607 (bg #32 + 31)
  Inode table at 1056198-1056703 (bg #32 + 7622)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 380513-388608
Group 48: (Blocks 1572864-1605631) csum 0x414b [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572864 (+0)
  Inode bitmap at 1572880 (+16)
  Inode table at 1572896-1573401 (+32)
  26672 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1572876-1572879, 1572892-1572895, 1578968-1605631
  Free inodes: 388609-396704
Group 49: (Blocks 1605632-1638399) csum 0x5d32 [INODE_UNINIT, ITABLE_ZEROED]
  Backup superblock at 1605632, Group descriptors at 1605633-1605633
  Reserved GDT blocks at 1605634-1606106
  Block bitmap at 1572865 (bg #48 + 1)
  Inode bitmap at 1572881 (bg #48 + 17)
  Inode table at 1573402-1573907 (bg #48 + 538)
  37 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1606107-1606143
  Free inodes: 396705-404800
Group 50: (Blocks 1638400-1671167) csum 0x1789 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572866 (bg #48 + 2)
  Inode bitmap at 1572882 (bg #48 + 18)
  Inode table at 1573908-1574413 (bg #48 + 1044)
  512 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1668608-1669119
  Free inodes: 404801-412896
Group 51: (Blocks 1671168-1703935) csum 0xa5c8 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572867 (bg #48 + 3)
  Inode bitmap at 1572883 (bg #48 + 19)
  Inode table at 1574414-1574919 (bg #48 + 1550)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 412897-420992
Group 52: (Blocks 1703936-1736703) csum 0x2d2a [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572868 (bg #48 + 4)
  Inode bitmap at 1572884 (bg #48 + 20)
  Inode table at 1574920-1575425 (bg #48 + 2056)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 420993-429088
Group 53: (Blocks 1736704-1769471) csum 0xf2db [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572869 (bg #48 + 5)
  Inode bitmap at 1572885 (bg #48 + 21)
  Inode table at 1575426-1575931 (bg #48 + 2562)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 429089-437184
Group 54: (Blocks 1769472-1802239) csum 0xe211 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572870 (bg #48 + 6)
  Inode bitmap at 1572886 (bg #48 + 22)
  Inode table at 1575932-1576437 (bg #48 + 3068)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1799040-1799167, 1799808-1800191, 1801728-1802239
  Free inodes: 437185-445280
Group 55: (Blocks 1802240-1835007) csum 0x78e7 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572871 (bg #48 + 7)
  Inode bitmap at 1572887 (bg #48 + 23)
  Inode table at 1576438-1576943 (bg #48 + 3574)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 445281-453376
Group 56: (Blocks 1835008-1867775) csum 0xab0f [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572872 (bg #48 + 8)
  Inode bitmap at 1572888 (bg #48 + 24)
  Inode table at 1576944-1577449 (bg #48 + 4080)
  0 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 
  Free inodes: 453377-461472
Group 57: (Blocks 1867776-1900543) csum 0xe573 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572873 (bg #48 + 9)
  Inode bitmap at 1572889 (bg #48 + 25)
  Inode table at 1577450-1577955 (bg #48 + 4586)
  1024 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1897472-1898495
  Free inodes: 461473-469568
Group 58: (Blocks 1900544-1933311) csum 0xdc70 [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572874 (bg #48 + 10)
  Inode bitmap at 1572890 (bg #48 + 26)
  Inode table at 1577956-1578461 (bg #48 + 5092)
  443 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1924677-1925119
  Free inodes: 469569-477664
Group 59: (Blocks 1933312-1939455) csum 0x04ff [INODE_UNINIT, ITABLE_ZEROED]
  Block bitmap at 1572875 (bg #48 + 11)
  Inode bitmap at 1572891 (bg #48 + 27)
  Inode table at 1578462-1578967 (bg #48 + 5598)
  4096 free blocks, 8096 free inodes, 0 directories, 8096 unused inodes
  Free blocks: 1933312-1937407
  Free inodes: 477665-485760