I have a system with 12 SATA disks attached via SAS. When copying into the array during re-sync I get filesystem errors and corruption for raid6 but not for raid5. This problem is repeatable. I actually have 2 separate 12 disk arrays and get the same behavior on both.
Does this sound familiar to anyone? Here's a little more detail: - 8 core AMD64 system running RHEL4U4 kernel 2.6.9-42.0.3.ELsmp - 12 Seagate ST3750640NS disks via LSI SAS1068 card and mptsas driver provided with kernel. Disk chassis is Promise VTrak J300s - build raid5/6 arrays using mdadm in the normal way - build filesystem using e2fs in the normal way - mount the array - fail out and re-add a disk using "mdadm -f/-r/-a /dev/sdd1" - while re-sync in progress start an rsync to copy large amount of data into the array For raid 5 array while rsync is running re-sync slows down enormously (as shown in /proc/mdstat), then speeds up again once rsync complete and all is good. Unmounting the array and running e2fsck shows no errors. For raid 6 re-sync slows down once rsync starts, but then after a few minutes I see the errors below and rsync stops. In this case unmounting and running e2fsck shows loads of errors. Apr 26 11:30:50 spt kernel: attempt to access beyond end of device Apr 26 11:30:50 spt kernel: md0: rw=1, want=14801215240, limit=14651489280 Apr 26 11:30:50 spt kernel: Aborting journal on device md0. Apr 26 11:30:50 spt kernel: ext3_abort called. Apr 26 11:30:50 spt kernel: EXT3-fs error (device md0): ext3_journal_start_sb: Detected aborted journal Apr 26 11:30:50 spt kernel: Remounting filesystem read-only Apr 26 11:30:50 spt kernel: EXT3-fs error (device md0) in start_transaction: Journal has aborted -- ********************************************************************** Clem Pryke - Assistant Professor - Astronomy and Astrophysics University of Chicago, Room 120, LASR, 933 East 56th Street, Chicago, Illinois 60637, USA Tel: 773 702-7853 Fax: 773 702-6645 email: [EMAIL PROTECTED] ********************************************************************** - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
