生长ZFS反射镜

Question

我有一个ZFS池，在RAID 10配置中有6个磁盘。

我想升级镜像中的驱动器，从1TB升级到3TB驱动器。我把所有的驱动器都安装在系统里了。

我不想通过更换一个驱动器，再银，重复。是否有一种方法可以执行我从现有镜像中读取的所有数据，保留我正在删除的驱动器上的所有磨损？

root@e7-4860:~# zpool status
  pool: stuffpoll
 state: ONLINE
  scan: scrub repaired 0 in 6h50m with 0 errors on Sun Dec 10 07:14:34 2017
config:

    NAME                                               STATE     READ WRITE CKSUM
    stuffpoll                                          ONLINE       0     0     0
      mirror-0                                         ONLINE       0     0     0
        ata-HGST_HTS721010A9E630_JR10004M0LGN6E-part1  ONLINE       0     0     0
        ata-HGST_HTS721010A9E630_JR10004M0M17TE-part1  ONLINE       0     0     0
      mirror-1                                         ONLINE       0     0     0
        ata-HGST_HTS541010A9E680_JA1000102MG9UR-part1  ONLINE       0     0     0
        ata-HGST_HTS541010A9E680_JA1009C03158BP-part1  ONLINE       0     0     0
      mirror-2                                         ONLINE       0     0     0
        ata-HGST_HTS721010A9E630_JR100X6P2TJKVE        ONLINE       0     0     0
        ata-HGST_HTS721010A9E630_JR100Y4M01200M        ONLINE       0     0     0

errors: No known data errors


root@e7-4860:~# zpool list
NAME        SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
stuffpoll  2.72T  2.47T   254G         -    48%    90%  1.00x  ONLINE  -


root@e7-4860:~# ls /dev/disk/by-id/ -1
ata-CT240BX200SSD1_1613F0194817
ata-CT240BX200SSD1_1613F0194817-part1
ata-HGST_HTS541010A9E680_JA1000102MG9UR
ata-HGST_HTS541010A9E680_JA1000102MG9UR-part1
ata-HGST_HTS541010A9E680_JA1000102MG9UR-part9
ata-HGST_HTS541010A9E680_JA1009C03158BP
ata-HGST_HTS541010A9E680_JA1009C03158BP-part1
ata-HGST_HTS541010A9E680_JA1009C03158BP-part9
ata-HGST_HTS721010A9E630_JR10004M0LGN6E
ata-HGST_HTS721010A9E630_JR10004M0LGN6E-part1
ata-HGST_HTS721010A9E630_JR10004M0LGN6E-part9
ata-HGST_HTS721010A9E630_JR10004M0M17TE
ata-HGST_HTS721010A9E630_JR10004M0M17TE-part1
ata-HGST_HTS721010A9E630_JR10004M0M17TE-part9
ata-HGST_HTS721010A9E630_JR100X6P2TJKVE
ata-HGST_HTS721010A9E630_JR100X6P2TJKVE-part1
ata-HGST_HTS721010A9E630_JR100X6P2TJKVE-part9
ata-HGST_HTS721010A9E630_JR100Y4M01200M
ata-HGST_HTS721010A9E630_JR100Y4M01200M-part1
ata-HGST_HTS721010A9E630_JR100Y4M01200M-part9
scsi-35000c50055fb009b
scsi-35000c50055fb395f

我希望最终将mirror-1中的驱动器替换为scsi-35000c50055fb009b和scsi-35000c50055fb395f

Answer 1

如果您想手动展开卷，只需使用-e选项将其联机。

zpool online -e stuffpoll

您还可以切换自动展开选项，使其自动发生。

zpool set autoexpand=on stuffpoll

因此，假设您正在增加镜像-2的新驱动器，这样您就可以扩展它。您需要附加新的驱动器，使用一个现有的设备名称作为目标。在删除旧设备之前，可以将这两个新设备添加到镜像中。

# zpool attach pool existing_vdev_member new_device
zpool attach stuffpoll ata-HGST_HTS721010A9E630_JR100X6P2TJKVE new_dev1
zpool attach stuffpoll ata-HGST_HTS721010A9E630_JR100X6P2TJKVE new_dev2

完成新设备的同步后，可以删除旧设备。

zpool detach stuffpoll ata-HGST_HTS721010A9E630_JR100X6P2TJKVE
zpool detach stuffpoll ata-HGST_HTS721010A9E630_JR100Y4M01200M

曼兹普尔

zpool attach [-f] pool device new_device

Attaches new_device to an existing zpool device. The existing device
cannot be part of a raidz configuration. If device is not currently
part of a mirrored configuration, device automatically transforms
into a two-way mirror of device and new_device.  If device is part of
a two-way mirror, attaching new_device creates a three-way mirror,
and so on. In either case, new_device begins to resilver immediately.
...

zpool detach pool device

Detaches device from a mirror.  The operation is refused if there are
no other valid replicas of the data.  If device may be re-added to
the pool later on then consider the zpool offline command instead.
...

zpool online [-e] pool device ...

Brings the specified physical device online.
-e  Expand the device to use all available space. If the device
    is part of a mirror or raidz then all devices must be
    expanded before the new space will become available to the
    pool.

链接

• https://www.freebsd.org/cgi/man.cgi?zpool(8)
• http://www.c0t0d0s0.org/archives/6224-You-dont-need-zfs-resize-...-and-a-workaround-when-you-need-one-;.html

还有，我想提醒大家。首先验证备份/还原。总是有可能发生一些不好的事情。还可以考虑在测试机器/VM上构建一个zfs池，并提前练习您的命令。