linux fs



1>Kernel Warning : EXT4-fs (dm-X): ext4_da_update_reserve_space (Doc ID 1616773.1)
# tune2fs -l /dev/mapper/<filesystem> | grep features

#  umount /<mount point>
# tune2fs -O <add features here> /dev/mapper/<filesystem>

# tune2fs -l /dev/mapper/<filesystem> | grep features

2>Unable To Mount File-system Getting error "Filesystem has unsupported feature(s) while trying to open /dev/vg0/lv1" (Doc ID 2021920.1)
#dumpe2fs /dev/vg0/lv1 | grep features
# mount /dev/vg0/lv1 /test-fs
# blkid /dev/vg0/lv1
/dev/vg0-lv1: UUID="de8114a7-8283-44b4-a57c-911a5b900083" TYPE="ext4"
# mount -a

3>How to Increase the File-Based Disk Size Attached to domU Running on Oracle VM (Doc ID 1639357.1)

[root@OVM-guest ~]# fdisk -l /dev/xvd

[root@OVM-guest ~]# mount /dev/xvdc /mnt

[root@OVM-guest ~]# df -h

[root@OVM-guest ~]# umount /mnt  

[root@OVM-guest ~]# e2fsck -f /dev/xvdc <<--------- run e2fsck prior to resize2fs

[root@OVM-guest ~]# resize2fs /dev/xvdc  <<--------------- running resize2fs for the new FS re-ordering
[root@OVM-guest ~]# df -h
/dev/xvdc             2.0G   18M  1.9G   1% /mnt <<<--------------- Effective New siz

[root@OVM-guest~]# tune2fs -l /dev/xvdc