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Date:      Fri, 2 Sep 2016 14:41:58 -0500
From:      Linda Kateley <lkateley@kateley.com>
To:        freebsd-fs@freebsd.org
Subject:   Re: phantom snapshots
Message-ID:  <bbb97a59-df1c-4ffc-f41b-953b0018c903@kateley.com>
In-Reply-To: <57C9D1FB.6040904@b1t.name>
References:  <58816ff0-3ab2-cbae-3d50-c4d5e89d9773@kateley.com> <57C9D1FB.6040904@b1t.name>

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On 9/2/16 2:24 PM, Volodymyr Kostyrko wrote:
> Linda Kateley wrote:
>> So I think I have isolated this to a phantom snapshot. At the end of
>> this zpool status although the names change everytime I run scrub, it
>> show unrecoverable error of files in a snapshot that doesn't exit.
>>
>> It also has in that zfs dataset it has a .zfs directory with a name of
>> old snaps.
>>
>> Anyone know how to view or clear these phantom snaps? I tried to remove
>> the files in the snapshot directory, but it is read-only.
>
> This looks like pointers to files that were already deleted/purged. I 
> once faced this errors but that was on bad controller, I don't think 
> this can be caused by bad memory/errors. When that happened I scrubbed 
> pool, removed all files noted, cleaned zpool errors (they are 
> persistent, even the file was removed and snapshots doen't exist they 
> are still shown) and scrubbed the pool again.
How did you remove the files in the snapshot? I keep trying but it is 
read-only? Can I remount it read-write?
>
>>
>> Ideas?
>>
>> Linda
>>
>>
>> pool: pool
>>   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 Fri Sep  2 10:42:48 2016
>>          46.8T scanned out of 144T at 2.48G/s, 11h11m to go
>>          46.5G resilvered, 32.40% done
>> config:
>>
>>      NAME                                            STATE READ
>> WRITE CKSUM
>>      pool                                            ONLINE 0     
>> 0    12
>>        raidz3-0                                      ONLINE 0     
>> 0     0
>>          gptid/ac108605-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ac591d4e-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ac92fd0d-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/accd3076-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ad067e97-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ad46cbee-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ad91ba17-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/adcbdd0a-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ae07dc0d-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ae494d10-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ae93a3a5-265c-11e5-9a02-0cc47a599098  ONLINE 0     
>> 0     0
>>        raidz3-1                                      ONLINE 0     
>> 0     0
>>          gptid/12f6a4c5-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/511ea1f9-1932-11e6-9b1e-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/14436fcf-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/14f50aa3-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/159b5654-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/163d682b-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/16ee624e-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/1799dde3-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/184c2ea4-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/18f51c30-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/19a861ea-c929-11e5-8075-0cc47a599098  ONLINE 0     
>> 0     0
>>        raidz3-2                                      ONLINE 0     
>> 0    24
>>          gptid/5f80fc42-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/60369e0f-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/60e8234a-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/61a235f2-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/62580471-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/6316a38a-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/63d4bce8-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ebfc2b99-6893-11e6-9b09-0cc47a599098  ONLINE 0     0 0
>> (resilvering)
>>          gptid/654f143a-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/66236b33-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/66eda3f6-4e00-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>        raidz3-3                                      ONLINE 0     
>> 0    24
>>          gptid/c77a9da9-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/c83e100e-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/c8fd9ced-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/c9bb21ba-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ca7a48db-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/cb422329-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/cbfe4c21-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ccc43528-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/cd93a34c-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/ce622f51-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>          gptid/cf2591d3-4e02-11e6-b7cf-0cc47a599098  ONLINE 0     
>> 0     0
>>      cache
>>        gptid/aedd3872-265c-11e5-9a02-0cc47a599098    ONLINE 0     
>> 0     0
>>        gptid/af559c10-265c-11e5-9a02-0cc47a599098    ONLINE 0     
>> 0     0
>>
>> errors: Permanent errors have been detected in the following files:
>>
>>          <0x597>:<0x1246>
>>          <0x597>:<0x1249>
>>          <0x597>:<0x125e>
>>          <0x597>:<0x1261>
>>          <0x597>:<0x127d>
>>          <0x597>:<0x1280>
>>          <0x599>:<0xe2c>
>>          <0x599>:<0xe2f>
>>          <0x599>:<0xe40>
>>          <0x599>:<0xe43>
>>          <0x599>:<0xe59>
>>          <0x599>:<0xe62>
>>          <0x5bc>:<0x2ad06>
>>          <0x5bc>:<0x2aef3>
>>          <0x5bc>:<0x2aef6>
>>          pool/.system@auto-20160720.2300-2d:<0x0>
>>          <0x5dc>:<0x397411>
>>          <0x5dc>:<0x397414>
>>          <0x5dc>:<0x38ee26>
>>          <0x5dc>:<0x38ee29>
>>          <0x5dc>:<0x38ee2c>
>>          <0x5dc>:<0x45b2e>
>>          <0x5dc>:<0x38ee2f>
>>          <0x5dc>:<0x38ee32>
>>          <0x5dc>:<0x394e58>
>>          <0x5dc>:<0x394e5b>
>>          <0x5dc>:<0x394e5e>
>>          <0x5dc>:<0x394e61>
>>          <0x5dc>:<0x394e64>
>>          <0x5dc>:<0x394e67>
>>          <0x5dc>:<0x394e6a>
>>          <0x5dc>:<0x397285>
>>
>> _______________________________________________
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>
>




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