除了 zpool add 命令外,还可以使用 zpool attach 命令将新设备添加到现有镜像设备或非镜像设备中。
如果要附加磁盘以创建镜像根池,请参见如何创建镜像根池(安装后)。
如果要替换 ZFS 根池中的磁盘,请参见如何替换 ZFS 根池中的磁盘。
在本示例中,zeepool 是现有的双向镜像,通过将新设备 c2t1d0 附加到现有设备 c1t1d0 可将其转换为三向镜像。
# zpool status zeepool pool: zeepool state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM zeepool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c0t1d0 ONLINE 0 0 0 c1t1d0 ONLINE 0 0 0 errors: No known data errors # zpool attach zeepool c1t1d0 c2t1d0 # zpool status zeepool pool: zeepool state: ONLINE scrub: resilver completed after 0h0m with 0 errors on Fri Jan 8 12:59:20 2010 config: NAME STATE READ WRITE CKSUM zeepool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c0t1d0 ONLINE 0 0 0 c1t1d0 ONLINE 0 0 0 c2t1d0 ONLINE 0 0 0 592K resilvered errors: No known data errors |
如果现有设备是三向镜像的一部分,则附加新设备将创建四向镜像,依此类推。在任一情况下,新设备都会立即开始重新同步。
此外,还可以通过使用 zpool attach 命令将非冗余存储池转换为冗余存储池。例如:
# zpool create tank c0t1d0 # zpool status tank pool: tank state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM tank ONLINE 0 0 0 c0t1d0 ONLINE 0 0 0 errors: No known data errors # zpool attach tank c0t1d0 c1t1d0 # zpool status tank pool: tank state: ONLINE scrub: resilver completed after 0h0m with 0 errors on Fri Jan 8 14:28:23 2010 config: NAME STATE READ WRITE CKSUM tank ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c0t1d0 ONLINE 0 0 0 c1t1d0 ONLINE 0 0 0 73.5K resilvered errors: No known data errors |
可以使用 zpool detach 命令从镜像存储池中分离设备。例如:
# zpool detach zeepool c2t1d0 |
# zpool detach newpool c1t2d0 cannot detach c1t2d0: only applicable to mirror and replacing vdevs |