Solaris zfs更换根池磁盘(Replace a Disk in the ZFS Root Pool)

文章由LinuxBoy分享于2019-03-24 04:03:26热评（518）

Solaris zfs更换根池磁盘(Replace a Disk in the ZFS Root Pool)

某些时候，由于空间不足或是硬件故障等原因，我们需要更换启动磁盘。

冗余池(mirrored pool)

在一个镜像池里面更远硬盘相对简单一些，只需要用replace命令直接更换硬盘即可。

# zpool offline rpool c1t0d0s0

# cfgadm -c unconfigure c1::dsk/c1t0d0

# cfgadm -c configure c1::dsk/c1t0d0

# zpool replace rpool c1t0d0s0

# zpool online rpool c1t0d0s0

# zpool status rpool

SPARC# installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c1t0d0s0

x86# installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c1t9d0s0

非冗余池

如果根池不是mirrored，那么就需要先把新磁盘分区好，加入根池形成mirrored类型的池。

加入新盘并检测

# devfsadm

分区并打标签

# format -e c8t1d0

format> partition

SELECT ONE OF THE FOLLOWING:

1. Create a partition

...

partition> print

Current partition table (original):

Total disk cylinders available: 30398 + 2 (reserved cylinders)

Part Tag Flag Cylinders Size Blocks

0 root wm 1 - 30396 232.85GB (30396/0/0) 488311740

1 unassigned wu 0 0 (0/0/0) 0

2 backup wu 0 - 30396 232.85GB (30397/0/0) 488327805

3 unassigned wu 0 0 (0/0/0) 0

4 unassigned wu 0 0 (0/0/0) 0

5 unassigned wu 0 0 (0/0/0) 0

6 unassigned wu 0 0 (0/0/0) 0

7 unassigned wu 0 0 (0/0/0) 0

8 boot wu 0 - 0 7.84MB (1/0/0) 16065

9 unassigned wu 0 0 (0/0/0) 0

partition>quit

format> label

[0] SMI Label

[1] EFI Label

Specify Label type[0]: 0

Ready to label disk, continue? y

添加磁盘

现在把做好的新磁盘分区加入根池形成镜像池，这一步里数据的同步可能会花费比较长的时间

# zpool attach rpool c0d0s0 c0d2s0

Make sure to wait until resilver is done before rebooting.

# zpool status

pool: rpool

state: ONLINE

status: One or more devices is currently being resilvered. The pool will

continue to function, possibly in a degraded state.

action: Wait for the resilver to complete.

scan: resilver in progress since Wed Jul 24 15:39:51 2013

302M scanned out of 7.47G at 11.2M/s, 0h10m to go

269M resilvered, 3.95% done

config:

NAME STATE READ WRITE CKSUM

rpool ONLINE 0 0 0

mirror-0 ONLINE 0 0 0

c0d0s0 ONLINE 0 0 0

c0d2s0 ONLINE 0 0 0 (resilvering)

errors: No known data errors

安装启动块

On a SPARC based system:

# installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c1t9d0s0

On an x86 based system:

# installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c1t9d0s0

验证boot

首先查看boot path

# prtconf -vp|grep -i bootpath

bootpath: '/virtual-devices@100/channel-devices@200/disk@0:a'

可以推断出新盘path的末尾是disk@2:a，然后启动

{0} ok setenv boot-device /virtual-devices@100/channel-devices@200/disk@2:a

boot-device = /virtual-devices@100/channel-devices@200/disk@2:a

{0} ok printenv boot-device

boot-device = /virtual-devices@100/channel-devices@200/disk@2:a

ok boot /virtual-devices@100/channel-devices@200/disk@2:a

移除老磁盘

# zpool detach rpool c0d0s0

扩展池空间

由于之前的磁盘空间小于新盘，所以现在的空间是和之前一样的，需要扩展一下。

# zpool set autoexpand=on rpool

至此为止，大功告成。

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