Messages in this thread | | | Date | Mon, 7 Sep 2009 12:59:27 +0100 | From | Chris Webb <> | Subject | Re: MD/RAID time out writing superblock |
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Chris Webb <chris@arachsys.com> writes:
> I have a bitmap on the array, but sometimes when I remove and re-add a > failed component, it doesn't seem to use the bitmap and does a lengthy full > recovery instead. One example that's ongoing at the moment:- > > [=>...................] recovery = 5.7% (40219648/703205312) finish=7546.3min speed=1463K/sec > bitmap: 34/126 pages [136KB], 8192KB chunk > > which is rather painful and has to be throttled back with speed_limit_max to > avoid the virtual machines running on top of it from having extremely poor IO > latency.
I've also noticed that during this recovery, I'm seeing lots of timeouts but they don't seem to interrupt the resync:
05:47:39 ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen 05:47:39 ata5.00: cmd ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in 05:47:39 res 40/00:00:00:4f:c2/00:00:00:00:00/40 Emask 0x4 (timeout) 05:47:39 ata5.00: status: { DRDY } 05:47:39 ata5: hard resetting link 05:47:49 ata5: softreset failed (device not ready) 05:47:49 ata5: hard resetting link 05:47:49 ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 05:47:49 ata5.00: configured for UDMA/133 05:47:49 ata5: EH complete 08:17:39 ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen 08:17:39 ata5.00: cmd ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in 08:17:39 res 40/00:00:35:83:f8/00:00:4d:00:00/40 Emask 0x4 (timeout) 08:17:39 ata5.00: status: { DRDY } 08:17:39 ata5: hard resetting link 08:17:49 ata5: softreset failed (device not ready) 08:17:49 ata5: hard resetting link 08:17:49 ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 08:17:49 ata5.00: configured for UDMA/133 08:17:49 ata5: EH complete 10:22:39 ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen 10:22:39 ata5.00: cmd ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in 10:22:39 res 40/00:00:00:4f:c2/00:00:00:00:00/40 Emask 0x4 (timeout) 10:22:39 ata5.00: status: { DRDY } 10:22:39 ata5: hard resetting link 10:22:49 ata5: softreset failed (device not ready) 10:22:49 ata5: hard resetting link 10:22:50 ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 10:22:51 ata5.00: configured for UDMA/133 10:22:51 ata5: EH complete
Cheers,
Chris.
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