Date: Thu, 1 Oct 2009 11:05:03 +0200 From: Solon Lutz <solon@pyro.de> To: freebsd-fs@freebsd.org Subject: Help needed! ZFS I/O error recovery? Message-ID: <683849754.20091001110503@pyro.de>
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Hi erverybody, I'm faced with a 10TB ZFS pool on a 12TB RAID6 Areca controller. And yes, I know, you shouldn't put a zpool on a RAID-device... =( Due to problems with a sata-cable, some days ago the raid-controller started to produce long timeouts to recover the resulting read errors. The cable was replaced, a parity check was run on the RAID-Volume and showed no errors, the zfs scrub however showed some 'defective' files. After copying these files with 'dd -conv=noerror...' and comparing them to the originals, they were error-free. Yesterday however, three more defective cables forced the controller to take the RAID6 volume offline. Now all cables were replaced and a parity check was run on the RAID-Volume -> data integrity OK. But now ZFS refuses to mount all volumes: Solaris: WARNING: can't process intent log for temp/space1 Solaris: WARNING: can't process intent log for temp/space2 Solaris: WARNING: can't process intent log for temp/space3 Solaris: WARNING: can't process intent log for temp/space4 A scrub revealed to following: errors: Permanent errors have been detected in the following files: temp:<0x0> temp/space1:<0x0> temp/space2:<0x0> temp/space3:<0x0> temp/space4:<0x0> I tried to switch off checksums for this pool, but that didn't help in any way. I also mounted the pool by hand and was faced with with 'empty' volumes and 'I/O errors' when trying to list their contents... Any suggestions? I'm offering some self-made blackberry jam and raspberry brandy to the person who can help to restore or backup the data. Tech specs: FreeBSD 7.2-STABLE #21: Tue May 5 18:44:10 CEST 2009 (AMD64) da0 at arcmsr0 bus 0 target 0 lun 0 da0: <Areca ARC-1280-VOL#00 R001> Fixed Direct Access SCSI-5 device da0: 166.666MB/s transfers (83.333MHz DT, offset 32, 16bit) da0: Command Queueing Enabled da0: 10490414MB (21484367872 512 byte sectors: 255H 63S/T 1337340C) ZFS filesystem version 6 ZFS storage pool version 6 Best regards, Solon
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