How to interpret repairs/errors or lack thereof?

[mattlach]

Hey all,

I did some googling trying to understand this, but got no closer to an answer.

First my zpool status:

Code:

 pool: zfshome
 state: ONLINE
  scan: scrub repaired 2.50M in 91h4m with 0 errors on Wed Dec 17 19:04:29 2014
config:

        NAME                                            STATE     READ WRITE CKSUM
        zfshome                                         ONLINE       0     0     0
          raidz2-0                                      ONLINE       0     0     0
            gptid/85faf71f-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
            gptid/86d3925a-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
            gptid/87a4d43b-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
            gptid/887d5e7f-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
            gptid/eb518a3c-63d9-11e4-8721-000c29dbe1ad  ONLINE       0     0     0
            gptid/b62d0aa1-638a-11e4-8721-000c29dbe1ad  ONLINE       0     0     0
          raidz2-1                                      ONLINE       0     0     0
            gptid/56fb015b-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
            gptid/576cde68-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
            gptid/57dbbac1-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
            gptid/584a4dcc-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
            gptid/58f4ec2f-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
            gptid/abd7d2b7-63cf-11e4-8721-000c29dbe1ad  ONLINE       0     0     0
        logs
          mirror-2                                      ONLINE       0     0     0
            da14p1                                      ONLINE       0     0     0
            da7p1                                       ONLINE       0     0     0
        cache
          gptid/89f2024c-4010-11e4-bf9d-000c29dbe1ad    ONLINE       0     0     0
          gptid/8a137ec5-4010-11e4-bf9d-000c29dbe1ad    ONLINE       0     0     0

I just noticed that during my last scrub 2.50M were repaired. with 0 errors.

How do I interpret that status? If something were repaired, there must have been some sort of error, right? What's further confusing me is that all of my read, write and cksum columns are 0.

So how do I interpret this? Is it normal, or some sort of bug? Is it something I should be concerned about?

Thanks,
Matt

 

[mattlach]

To follow up, ran another scrub (still going), with more repairs, but still no read write or cksum errors...

Again, is this normal??

Code:

  pool: zfshome
 state: ONLINE
  scan: scrub in progress since Fri Jan 16 15:48:18 2015
        8.08T scanned out of 21.4T at 287M/s, 13h32m to go
        196K repaired, 37.68% done
config:

    NAME                                            STATE     READ WRITE CKSUM
    zfshome                                         ONLINE       0     0     0
     raidz2-0                                      ONLINE       0     0     0
       gptid/85faf71f-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
       gptid/86d3925a-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
       gptid/87a4d43b-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0
       gptid/887d5e7f-2b00-11e4-bc04-d8d3855ce4bc  ONLINE       0     0     0  (repairing)
       gptid/eb518a3c-63d9-11e4-8721-000c29dbe1ad  ONLINE       0     0     0
       gptid/b62d0aa1-638a-11e4-8721-000c29dbe1ad  ONLINE       0     0     0
     raidz2-1                                      ONLINE       0     0     0
       gptid/56fb015b-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
       gptid/576cde68-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
       gptid/57dbbac1-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
       gptid/584a4dcc-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
       gptid/58f4ec2f-2bfc-11e4-be49-001517168acc  ONLINE       0     0     0
       gptid/abd7d2b7-63cf-11e4-8721-000c29dbe1ad  ONLINE       0     0     0
    logs
     mirror-2                                      ONLINE       0     0     0
       da14p1                                      ONLINE       0     0     0
       da7p1                                       ONLINE       0     0     0
    cache
     gptid/89f2024c-4010-11e4-bf9d-000c29dbe1ad    ONLINE       0     0     0
     gptid/8a137ec5-4010-11e4-bf9d-000c29dbe1ad    ONLINE       0     0     0

errors: No known data errors