How can I determine what RAIDZ level my volume is using?

Question

I am looking at a ZFS volume on FreeBSD system, and I have no idea what RAIDZ level it is configured at. How can I find out using the ZFS command line or other?

I tried "zpool status" already, and got this:

    TANK                                            ONLINE       0     0     0
      raidz1-0                                      ONLINE       0     0     0
        gptid/19481bef-c121-11e3-bd5b-0cc47a005e96  ONLINE       0     0     0
        gptid/1a09563a-c121-11e3-bd5b-0cc47a005e96  ONLINE       0     0     0
        gptid/1ac63968-c121-11e3-bd5b-0cc47a005e96  ONLINE       0     0     0
        gptid/1b884b06-c121-11e3-bd5b-0cc47a005e96  ONLINE       0     0     0
        gptid/1c4697ff-c121-11e3-bd5b-0cc47a005e96  ONLINE       0     0     0

the thing that seems even close to what I'm looking for is "raidz1-0" but I'm thinking that is a numbering scheme only and not an actual raid level.

longneck · Accepted Answer · 2014-04-24T20:04:17.800

4

zpool status will list all of the drives and their layout, including mirror/RAID level.

In your case, raidz1-0 means you are running raidz1 and the group number is 0.

edited Apr 24 '14 at 20:04

answered Apr 24 '14 at 19:56

longneck

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Thanks, I tried that. But it didn't give me what I need. I guess I should update my question as to what I already tried. – 7wp Apr 24 '14 at 20:01
@7wp see my edit. – longneck Apr 24 '14 at 20:04

score 4 · Answer 2 · answered Apr 24 '14 at 20:52

You were running the right command. zpool status -v is the correct way to understand what a ZFS pool is comprised of. A better example, as the vdev groups are enumerated, beginning with 0. Note the multiple mirror groups and single raidz group below:

[root@MDMarra ~]# zpool status -v
  pool: vol1
 state: ONLINE
  scan: scrub repaired 0 in 0h32m with 0 errors on Sun Feb 16 17:34:42 2014
config:

        NAME                        STATE     READ WRITE CKSUM
        vol1                        ONLINE       0     0     0
          mirror-0                  ONLINE       0     0     0
            wwn-0x500000e014609480  ONLINE       0     0     0
            wwn-0x500000e0146097d0  ONLINE       0     0     0
          mirror-1                  ONLINE       0     0     0
            wwn-0x500000e0146090c0  ONLINE       0     0     0
            wwn-0x500000e01460fd60  ONLINE       0     0     0
          mirror-2                  ONLINE       0     0     0
            wwn-0x500000e01460e7f0  ONLINE       0     0     0
            wwn-0x500000e0163a9990  ONLINE       0     0     0
          mirror-3                  ONLINE       0     0     0
            wwn-0x500000e014611300  ONLINE       0     0     0
            wwn-0x500000e0152a3550  ONLINE       0     0     0
          mirror-4                  ONLINE       0     0     0
            wwn-0x5000c5001cdf0113  ONLINE       0     0     0
            wwn-0x500000e014605e30  ONLINE       0     0     0

errors: No known data errors

  pool: vol2
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Sun Feb 16 17:03:28 2014
config:

        NAME                        STATE     READ WRITE CKSUM
        vol2                        ONLINE       0     0     0
          raidz1-0                  ONLINE       0     0     0
            wwn-0x5000c5000c245113  ONLINE       0     0     0
            wwn-0x5000c5000b307057  ONLINE       0     0     0
            wwn-0x5000c5001cc4b45b  ONLINE       0     0     0
            wwn-0x5000c5000b30d58b  ONLINE       0     0     0
            wwn-0x5000cca00a0ea20c  ONLINE       0     0     0
            wwn-0x5000cca00a1a63ec  ONLINE       0     0     0

How can I determine what RAIDZ level my volume is using?

2 Answers2