[Bug 219760] ZFS iSCSI w/ Win10 Initiator Causes pool corruption

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Jun 3 19:14:39 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219760

            Bug ID: 219760
           Summary: ZFS iSCSI w/ Win10 Initiator Causes pool corruption
           Product: Base System
           Version: 11.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: henric_jungheim at yahoo.com

Created attachment 183182
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=183182&action=edit
dmesg

With a zvol to provide a 1TB iSCSI drive for a Windows 10 initiator, using
"Create a system image" causes the pool to be corrupted.  Neither drive reports
any SMART problems (both have "SMART overall-health self-assessment test
result: PASSED").  The backup completes without errors on the Windows side.

The iSCSI volume is set for 64k blocks and that is also the NTFS cluster size. 
The backup is from two SATA SSDs in a laptop and done over a Gigabit Ethernet
link. Bitlocker is enabled for the backup volume on the Windows side, which
could possibly alter the disk access patterns...?  

Deleting the zvol, clearing the error, and retrying the backup to a new zvol
causes the same problem.  The first try used "FreeBSD 11.0-STABLE #10 r317513:
Thu Apr 27 12:09:34 MST 2017".  I updated to "FreeBSD 11.1-PRERELEASE #11
r319488: Thu Jun  1 21:12:33 MST 2017" for the second try.

  pool: tank
 state: DEGRADED
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: http://illumos.org/msg/ZFS-8000-8A
  scan: scrub repaired 0 in 9h34m with 0 errors on Fri Jun  2 22:36:45 2017
config:

        NAME            STATE     READ WRITE CKSUM
        tank            DEGRADED     0     0    74
          mirror-0      ONLINE       0     0     0
            gpt/tank0   ONLINE       0     0     0
            gpt/tank1   ONLINE       0     0     0
          mirror-1      DEGRADED     0     0   148
            gpt/tank0b  DEGRADED     0     0   148  too many errors
            gpt/tank1b  DEGRADED     0     0   148  too many errors

errors: Permanent errors have been detected in the following files:

        tank/iscsi/mcp2:<0x1>


NAME             PROPERTY              VALUE                  SOURCE
tank/iscsi/mcp2  type                  volume                 -
tank/iscsi/mcp2  creation              Fri Jun  2 12:49 2017  -
tank/iscsi/mcp2  used                  1.00T                  -
tank/iscsi/mcp2  available             3.22T                  -
tank/iscsi/mcp2  referenced            971G                   -
tank/iscsi/mcp2  compressratio         1.00x                  -
tank/iscsi/mcp2  reservation           none                   default
tank/iscsi/mcp2  volsize               1T                     local
tank/iscsi/mcp2  volblocksize          64K                    -
tank/iscsi/mcp2  checksum              skein                  inherited from
tank
tank/iscsi/mcp2  compression           off                    local
tank/iscsi/mcp2  readonly              off                    default
tank/iscsi/mcp2  copies                1                      default
tank/iscsi/mcp2  refreservation        1.00T                  local
tank/iscsi/mcp2  primarycache          all                    default
tank/iscsi/mcp2  secondarycache        all                    default
tank/iscsi/mcp2  usedbysnapshots       0                      -
tank/iscsi/mcp2  usedbydataset         971G                   -
tank/iscsi/mcp2  usedbychildren        0                      -
tank/iscsi/mcp2  usedbyrefreservation  57.2G                  -
tank/iscsi/mcp2  logbias               latency                default
tank/iscsi/mcp2  dedup                 off                    default
tank/iscsi/mcp2  mlslabel                                     -
tank/iscsi/mcp2  sync                  standard               default
tank/iscsi/mcp2  refcompressratio      1.00x                  -
tank/iscsi/mcp2  written               971G                   -
tank/iscsi/mcp2  logicalused           970G                   -
tank/iscsi/mcp2  logicalreferenced     970G                   -
tank/iscsi/mcp2  volmode               default                default
tank/iscsi/mcp2  snapshot_limit        none                   default
tank/iscsi/mcp2  snapshot_count        none                   default
tank/iscsi/mcp2  redundant_metadata    all                    default

Geom name: ada3
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 11721045127
first: 40
entries: 152
scheme: GPT
Providers:
1. Name: ada3p1
   Mediasize: 6001173463040 (5.5T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r1w1e2
   rawuuid: 7830d285-8079-11e6-b5ec-00e081c81bd6
   rawtype: 516e7cba-6ecf-11d6-8ff8-00022d09712b
   label: tank0b
   length: 6001173463040
   offset: 1048576
   type: freebsd-zfs
   index: 1
   end: 11721043967
   start: 2048
Consumers:
1. Name: ada3
   Mediasize: 6001175126016 (5.5T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r1w1e3
Geom name: ada4
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 11721045127
first: 40
entries: 152
scheme: GPT
Providers:
1. Name: ada4p1
   Mediasize: 6001173463040 (5.5T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r1w1e2
   rawuuid: 7b35d907-8079-11e6-b5ec-00e081c81bd6
   rawtype: 516e7cba-6ecf-11d6-8ff8-00022d09712b
   label: tank1b
   length: 6001173463040
   offset: 1048576
   type: freebsd-zfs
   index: 1
   end: 11721043967
   start: 2048
Consumers:
1. Name: ada4
   Mediasize: 6001175126016 (5.5T)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r1w1e3

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