Replacing disk in single disk stripe

[FJep]

Hi,

I am planning to replace a disk in a single disk stripe

Code:

# zpool status
  pool: VolA1
 state: ONLINE
status: Some supported features are not enabled on the pool. The pool can
        still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
        the pool may no longer be accessible by software that does not support
        the features. See zpool-features(7) for details.
  scan: scrub repaired 0 in 0 days 03:01:50 with 0 errors on Sun Jun 21 03:01:58 2020
config:

        NAME                                          STATE     READ WRITE CKSUM
        VolA1                                         ONLINE       0     0     0
          gptid/9ad8b20d-c0ea-11e7-b63e-7085c2464c1b  ONLINE       0     0     0

errors: No known data errors

There are two folders on that Vol (music, pictures, log), a rsync job copying these folders and a smb share.

I know I could remove the Vol and switch disks and create everything from scratch, but is there an easier way?

Greetings
Frank

 

[Patrick M. Hausen]

You can create a mirror pair, then remove the old disk after the vdev resilvered. See zpool attach, zpool detach.

If you need more details, just ask ;)

 

[Samuel Tai]

Alternatively, attach a spare disk to the pool.

 

[Patrick M. Hausen]

@Samuel Tai That's what I meant. Attach a new/spare disk to the same vdev to build a mirror, then remove the old one. if you add another disk to the pool you end up with two single disk vdevs and cannot remove either one.

 

[FJep]

Thanks for your help.
But since I got no spare SATA connectors I copied all data away and export/disconnected the pool, swapped disks and added the new disk as new pool of same name.
With the other disk I did the same. There were only the SMBs and two rsyncs to reconfigure, which was easier then expected.

 

[zierbeek]

@Samuel Tai That's what I meant. Attach a new/spare disk to the same vdev to build a mirror, then remove the old one. if you add another disk to the pool you end up with two single disk vdevs and cannot remove either one.

Hi patrick, now I will try to get an answer from you with this! ;)

i had an old 1tb harddrive from a friend's ps4 which I used for some media.This one is failing, as expected and I am replacing it with a 2tb new one. Can I just replace them or how does this need to go?

 

[Patrick M. Hausen]

Code:

gpart backup <olddrive> | gpart restore <newdrive>
gpart list <newdrive>
# look for "rawuuid" of the ZFS partition on new drive
zpool status
# look for gptid of old drive
zpool attach <yourpool> gptid/<id-of-old-drive> gptid/<id-of-new-drive>

 

[zierbeek]

thanks!

 

[zierbeek]

Code:

gpart backup <olddrive> | gpart restore <newdrive>
gpart list <newdrive>
# look for "rawuuid" of the ZFS partition on new drive
zpool status
# look for gptid of old drive
zpool attach <yourpool> gptid/<id-of-old-drive> gptid/<id-of-new-drive>

the new drive isn't showing up in cli but in truenas it is. should I gpart create ..

 

[Patrick M. Hausen]

What do you mean?

Code:

camcontrol devlist
dmesg

don't show your new device?

You should not use gpart create but copy the partition table of your existing disk with gpart backup <old disk>| gpart restore <new disk>. For this operation you need the device nodes (adaX), not the GPT IDs.