[SOLVED] Add drive to zfs pool to create RAIDZ1

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Por12

Member
Mar 6, 2023
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Hi there,

Up until now I was running a PBS pointing to a lone 12 TB drive. Following directions on the forum I have now bought and installed a second 12 TB HDD with the intent of creating a mirror and have resiliency against drive failures.

Currently I have around 2 TB used on that drive.

What would be the recommended method to add the drive to the ZFS array? Copy the 2 TB to another server, destroy and re-create the array and the datasets? Or is there anything simpler?

The pool I want to mirror is the rust-aphrodite.

Thanks!

Code: 
root@aphrodite:~# zpool status
  pool: rpool
 state: ONLINE
  scan: scrub repaired 0B in 00:00:11 with 0 errors on Sun Sep  8 00:24:12 2024
config:


        NAME                                               STATE     READ WRITE CKSUM
        rpool                                              ONLINE       0     0     0
          nvme-eui.01000000000000008ce38e04043a99c0-part3  ONLINE       0     0     0


errors: No known data errors


  pool: rust-aphrodite
 state: ONLINE
  scan: scrub repaired 0B in 05:30:10 with 0 errors on Sun Sep  8 05:54:11 2024
config:


        NAME                                 STATE     READ WRITE CKSUM
        rust-aphrodite                       ONLINE       0     0     0
          ata-HGST_HUH721212ALN600_5PHKH26D  ONLINE       0     0     0


errors: No known data errors
 
zpool attach rust-aphrodite /dev/disk/by-id/ata-HGST_HUH721212ALN600_5PHKH26D /dev/disk/by-id/... # add here the right from the new 12TB hdd
zpool status
 
waltar said:
zpool attach rust-aphrodite /dev/disk/by-id/ata-HGST_HUH721212ALN600_5PHKH26D /dev/disk/by-id/... # add here the right from the new 12TB hdd
zpool status
Click to expand...
not sure about this approach. This gonna just add 12To to his stripped pool, without convert to mirror.

@Por12 , you just have 2To of used data on this pool. The best way is to snapshot the dataset and save it (on a temporary stripped pool or in a file, destroy your zpool, and re-create it mirrored :) Just have to import snapshot after
 
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zpool "add" rust-aphrodite /dev/disk... /dev/disk... should "create a stripped" pool, "attach" should "create a mirrored pool" out of a single disk ... in theory, perhaps the best test with a few truncate files before :)
 
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Pifouney said:
not sure about this approach. This gonna just add 12To to his stripped pool, without convert to mirror.

@Por12 , you just have 2To of used data on this pool. The best way is to snapshot the dataset and save it (on a temporary stripped pool or in a file, destroy your zpool, and re-create it mirrored :) Just have to import snapshot after
Click to expand...
Any guide on how to save the snapshot as a file?

Thanks!

waltar said:
zpool "add" rust-aphrodite /dev/disk... /dev/disk... should "create a stripped" pool, "attach" should "create a mirrored pool" out of a single disk ... in theory, perhaps the best test with a few truncate files before :)
Click to expand...
It’s definitely simple and easy if it does what intend!

Regards
 
waltar said:
zpool "add" rust-aphrodite /dev/disk... /dev/disk... should "create a stripped" pool, "attach" should "create a mirrored pool" out of a single disk ... in theory, perhaps the best test with a few truncate files before :)
Click to expand...
TY for the tips !!!!! :O
 
It did work a treat! It's currently resilvering the second drive. For further reference, to know what is the ID of the new drive use command: ls /dev/disk/by-id/

The drive does not necessarily needs to have a GPT partition if you don't intent to boot from it.

Thanks again!

Code: 
root@aphrodite:~# zpool attach rust-aphrodite /dev/disk/by-id/ata-HGST_HUH721212ALN600_5PHKH26D /dev/disk/by-id/ata-ST12000NM0127_ZJV4763V
root@aphrodite:~# zpool status
  pool: rpool
 state: ONLINE
  scan: scrub repaired 0B in 00:00:11 with 0 errors on Sun Sep  8 00:24:12 2024
config:

        NAME                                               STATE     READ WRITE CKSUM
        rpool                                              ONLINE       0     0     0
          nvme-eui.01000000000000008ce38e04043a99c0-part3  ONLINE       0     0     0

errors: No known data errors

  pool: rust-aphrodite
 state: ONLINE
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
  scan: resilver in progress since Sun Sep 22 12:35:14 2024
        912G / 1.50T scanned at 70.1G/s, 0B / 1.50T issued
        0B resilvered, 0.00% done, no estimated completion time
config:

        NAME                                   STATE     READ WRITE CKSUM
        rust-aphrodite                         ONLINE       0     0     0
          mirror-0                             ONLINE       0     0     0
            ata-HGST_HUH721212ALN600_5PHKH26D  ONLINE       0     0     0
            ata-ST12000NM0127_ZJV4763V         ONLINE       0     0     0

errors: No known data errors
root@aphrodite:~#

waltar said:
zpool "add" rust-aphrodite /dev/disk... /dev/disk... should "create a stripped" pool, "attach" should "create a mirrored pool" out of a single disk ... in theory, perhaps the best test with a few truncate files before :)
Click to expand...
 
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