Comments Helpful Follow How to change the starting block of a partition inside the kickstart itself?-优快云博客

本文详细介绍了如何在Red Hat Enterprise Linux 5中通过Kickstart脚本修改分区起始扇区，实现从默认的63扇区更改为128扇区的方法。此操作对于硬盘的性能优化和数据读写效率提升具有重要意义。

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https://access.redhat.com/solutions/44613

环境

Red Hat Enterprise Linux 5

问题

How to change the change the starting block of a partition inside the kickstart itself?

For example, 63 is the default. How to change it to 128.

Raw

$ /sbin/fdisk  -lu

Disk /dev/sda: 160.0 GB, 160000000000 bytes
255 heads, 63 sectors/track, 19452 cylinders, total 312500000 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63      401624      200781   83  Linux
/dev/sda2          401625   304303229   151950802+  8e  Linux LVM
/dev/sda3       304303230   312496379     4096575   82  Linux swap / Solaris

Disk /dev/sdb: 160.0 GB, 160000000000 bytes
255 heads, 63 sectors/track, 19452 cylinders, total 312500000 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *          63   312496379   156248158+  8e  Linux LVM

决议

Yes Partition alignment in kickstart is possible. To change the start sector from 63 to something like 128 or similar check the below example kickstart script.

Raw

clearpart --none
part /boot --fstype ext3 --onpart=sda1
part pv.01 --onpart=sda2
volgroup myvg pv.01
logvol / --fstype ext3 --name=lv_root --vgname=myvg --size=4096 --grow
logvol swap --fstype swap --name=lv_swap --size=512 --vgname=myvg

%pre
DISK=/dev/sda
dd if=/dev/zero of=$DISK bs=1024 count=1
fdisk $DISK << EOF
n
p
1

+100M
x
b
1
128
w
EOF

fdisk $DISK << EOF
n
p
2


x
b
2
208848
w
EOF