Add disk to vdev (stripe to mirror)

[johannes96]

Hi,

I'm trying to add another disk to my existing pool to convert the single stripe vdev to a mirror vdev.

My current simple pool layout looks like:

root@truenas:~# zpool status zhdd
pool: zhdd
state: ONLINE
config:

NAME STATE READ WRITE CKSUM
zhdd ONLINE 0 0 0
42238b1c-7028-4d9b-9b0d-852e9ff41811 ONLINE 0 0 0

errors: No known data errors

my disk ids:

ls -l /dev/disk/by-id
ata-ST6000VN0033-2EE110_XXXXXXXX -> ../../sdd
ata-WDC_WD60EZRZ-00RWYB1_WD-XXXXXXXXX -> ../../sdc

sdd is already part of the pool. sdc is the empty new drive. I tried to add the disk by "name" and by "id" neither did work.

zpool attach zhdd /dev/disk/by-id/ata-ST6000VN0033-2EE110_ZAD90GZJ /dev/disk/by-id/ata-WDC_WD60EZRZ-00RWYB1_WD-XXXXXXXXX
cannot attach /dev/disk/by-id/ata-WDC_WD60EZRZ-00RWYB1_WD-WX71D6589HR4 to /dev/disk/by-id/ata-ST6000VN0033-2EE110_XXXXXXXX : no such device in pool

root@truenas:~# zpool attach zhdd /dev/sdd /dev/sdc
cannot attach /dev/sdc to /dev/sdd: no such device in pool

I think I'm a little bit lost between disk names / ids and partition uuids. The output of "zpool status" looks like the vdev was create on partition level. Is this assumption corret?

Could anyone give me a hint how to fix this?

Best regards
Johannes

 

[Patrick M. Hausen]

You need to create the partition table first and then use /dev/disk/by-partuuid/<device>

Code:

root@scale[~]# zpool status           
[...]
pool: ssd
 state: ONLINE
config:

    NAME                                      STATE     READ WRITE CKSUM
    ssd                                       ONLINE       0     0     0
      mirror-0                                ONLINE       0     0     0
        7c72c6fe-a91a-41fd-b951-07f10e620cf9  ONLINE       0     0     0
        f7f488ad-27e6-4cf8-8bbf-c8c0da9b508d  ONLINE       0     0     0

errors: No known data errors
root@scale[~]# ll /dev/disk/by-partuuid
[...]
lrwxrwxrwx 1 root  15 Nov 30 11:54 7c72c6fe-a91a-41fd-b951-07f10e620cf9 -> ../../nvme1n1p2
lrwxrwxrwx 1 root  15 Nov 30 11:54 f7f488ad-27e6-4cf8-8bbf-c8c0da9b508d -> ../../nvme0n1p2
[...]

I forget what the name of the Linux partition tool is this week, again - recreate the exact same layout as is on your first disk.

 

[Etorix]

Just do it through the GUI and let the middleware partition and add gptid for you. With Core:
Storage > Pools > (gear) > Status > (…) > Extend
I assume it's the same for SCALE.

 

[johannes96]

thanks for your fast responses!

I gave the gui option a try. Now I have a resilvering mirror vdev

 

[sretalla]

I guess that time estimate is wrong (a little over 7 years!)... Maybe it's already done?

 

[TN68]

+1, thanks @Etorix !!!