在有些時候我們需要更換開機硬碟，或是既有硬碟容量太小，欲更換成較大的硬碟，ZFS 與過去UFS的做法有些不同，UFS常用的方法為ufsdump 跟ufsrestore方式，而ZFS使用mirror操作，更為快速及方便。
使用設備Oracle SPARC T3-2，開機硬碟為146GB硬碟，欲改成300GB硬碟
檢視目前機器內的硬碟：
AVAILABLE DISK SELECTIONS:
0. c0t5000C5000EBDE997d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/scsi_vhci/disk@g5000c5000ebde997/dev/chassis//SYS/SASBP/HDD0/disk
1. c0t5000C50039BD744Bd0 <SEAGATE-ST930003SSUN300G-0B70 cyl 46873 alt 2 hd 20 sec 625> /scsi_vhci/disk@g5000c50039bd744b/dev/chassis//SYS/SASBP/HDD1/disk
檢示zpool 狀態
# zpool statu tus -v
pool: rpool
state: ONLINE
scan: resilvered 70.0G in 0h18m with 0 errors on Tue Oct 27 13:08:53 2015
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c0t5000C5000EBDE997d0s6 ONLINE 0 0 0
檢示磁區狀態 (現為146GB)
# df -h
Filesystem Size Used Available Capacity Mounted on
rpool/ROOT/solaris 134G 2.1G 62G 4% /
/devices 0K 0K 0K 0% /devices
略
將第二顆硬碟(300GB)與開機硬碟mirror
# zpool attach -f rpool c0t5000C5000EBDE997d0s6 c0t5000C50039BD744
檢視mirror進度，須等兩顆資料同步後100%再行拆開
# zpool status -v
pool: rpool
state: DEGRADED
status: One or more devices is currently being resilvered. The pool will
continue to function in a degraded state.
action: Wait for the resilver to complete.
scan: resilver in progress since Tue Oct 27 14:44:52 2015
4.10G scanned out of 70.0G at 45.2M/s, 0h24m to go
4.10G resilvered, 5.86% done
config:
NAME STATE READ WRITE CKSUM
rpool DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
c0t5000C5000EBDE997d0s6 ONLINE 0 0 0
c0t5000C50039BD744Bd0s6 DEGRADED 0 0 0 (resilvering)
device details:
c0t5000C50039BD744Bd0s6 DEGRADED scrub/resilver needed
status: ZFS detected errors on this device.
The device is missing some data that is recoverable.
see: http://support.oracle.com/msg/ZFS-8000-QJ for recovery
errors: No known data errors
Mirror 完成
# zpool status -v
pool: rpool
state: ONLINE
scan: resilvered 70.0G in 0h18m with 0 errors on Tue Oct 27 15:03:07 2015
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
c0t5000C5000EBDE997d0s6 ONLINE 0 0 0
c0t5000C50039BD744Bd0s6 ONLINE 0 0 0
errors: No known data errors
建立第二顆硬碟(300GB)開機磁區
# installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c0t5000C50039BD744Bd0s6
WARNING: target device /dev/rdsk/c0t5000C50039BD744Bd0s6 has a versioned bootblock but no versioning information was provided.
bootblock version installed on /dev/rdsk/c0t5000C50039BD744Bd0s6 is more recent or identical
Use -F to override or install without the -u option
要從第二顆硬碟開機，先將系統下至OK Mode
# init 0
設定好裝置別名，方便開機使用，第一顆命名為rootdisk，第二顆命名為rootmir
{0} ok devalias
screen /pci@400/pci@1/pci@0/pci@0/pci@0/display@0
mouse /pci@400/pci@1/pci@0/pci@b/pci@0/usb@0,2/hub@2/device@4/mouse@1
rootdisk /pci@400/pci@2/pci@0/pci@e/scsi@0/disk@w5000c5000ebde995,0:g
rootmir /pci@400/pci@2/pci@0/pci@e/scsi@0/disk@5000c50039bd7449,0:g
由第二顆開啟(300GB)
{0} ok boot rootmir
Boot device: /pci@400/pci@2/pci@0/pci@e/scsi@0/disk@5000c50039bd7449,0:g File and args:
檢視zpool狀態
# zfspool status -v
pool: rpool
state: ONLINE
scan: resilvered 70.0G in 0h18m with 0 errors on Tue Oct 27 15:03:07 2015
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
c0t5000C5000EBDE997d0s6 ONLINE 0 0 0
c0t5000C50039BD744Bd0s6 ONLINE 0 0 0
將第一顆硬碟(146GB)從rpool 移除
# zpool detach rpool c0t5000C5000EBDE997d0s6
檢視zpool狀態
# zpolol stat -vatus -v
pool: rpool
state: ONLINE
scan: resilvered 70.0G in 0h18m with 0 errors on Tue Oct 27 15:03:07 2015
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c0t5000C50039BD744Bd0s6 ONLINE 0 0 0
errors: No known data errors
檢示磁區狀態 (變成300GB大小了)
# df -h
Filesystem Size Used Available Capacity Mounted on
rpool/ROOT/solaris 275G 2.1G 202G 2% /
略
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