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。
<Physically remove failed disk c1t0d0>
<Physically insert replacement disk c1t0d0>
# zpool status rpool
<Let disk resilver before installing the boot blocks>
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> 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
partition>quit
format> label
[0] SMI Label
[1] EFI Label
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
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.
302M scanned out of 7.47G at 11.2M/s, 0h10m to go
269M resilvered, 3.95% done
config:
NAME STATE READ WRITE CKSUM
c0d2s0 ONLINE 0 0 0 (resilvering)
errors: No known data errors
安装启动块
On a SPARC based system:
On an x86 based system:
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
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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