Chris Webb <chris@xxxxxxxxxxxx> writes: > Mark Lord <liml@xxxxxx> writes: > > > Speaking of which.. > > > > Chris: I wonder if the errors will also vanish in your situation > > by disabling the onboard write-caches in the drives ? > > > > Eg. hdparm -W0 /dev/sd? > > Hi Mark. I've got a test machine on its way at the moment, so I'll make sure > I check this one out on it too. Our test machine is still being built, but we had an opportunity to try this on a couple of the live machines when their RAID arrays failed over the weekend. We still got timeouts, but (predictably!) they're not on flushes any more: ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 ata2.00: cmd 35/00:08:98:c6:00/00:00:4e:00:00/e0 tag 0 dm res 40/00:00:00:00:00/00:00:00:00:00/40 Emask 0x4 ata2.00: status: { DRDY } ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2.00: configured for UDMA/33 ata2: EH complete [...] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 ata2.00: cmd 35/00:08:18:94:68/00:00:3d:00:00/e0 tag 0 dm res 40/00:00:00:00:00/00:00:00:00:00/40 Emask 0x4 ata2.00: status: { DRDY } ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2.00: configured for UDMA/33 ata2: EH complete [...] all the way through the night. I also have these in the log, but they are immediately after turning off the write caching in all drives, so may be a red herring with data still being written out. ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 ata2.00: cmd c8/00:08:00:20:80/00:00:00:00:00/e0 tag 0 dm res 40/00:00:00:00:00/00:00:00:00:00/40 Emask 0x4 ata2.00: status: { DRDY } ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2.00: configured for UDMA/133 ata2: EH complete ata2.00: limiting speed to UDMA/100:PIO4 ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 ata2.00: cmd 25/00:08:80:3e:2d/00:00:4e:00:00/e0 tag 0 dm res 40/00:00:00:00:00/00:00:00:00:00/40 Emask 0x4 ata2.00: status: { DRDY } ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: link is slow to respond, please be patient (ready=0 ata2: softreset failed (device not ready) ata2: hard resetting link ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2.00: configured for UDMA/100 ata2: EH complete On another machine, I saw this with write caching turned off: ata2.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen ata2.00: cmd 61/08:00:28:1f:80/00:00:00:00:00/40 tag 0 ncq 4096 out res 40/00:00:40:1f:80/00:00:00:00:00/40 Emask 0x4 (timeout) ata2.00: status: { DRDY } ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: configured for UDMA/133 ata2: EH complete ata2.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x6 frozen ata2.00: cmd 61/08:00:28:1f:80/00:00:00:00:00/40 tag 0 ncq 4096 out res 40/00:00:20:1f:80/00:00:00:00:00/40 Emask 0x4 (timeout) ata2.00: status: { DRDY } ata2: hard resetting link ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata2.00: qc timeout (cmd 0xef) ata2.00: failed to set xfermode (err_mask=0x4) ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: link is slow to respond, please be patient (ready=0) ata2: softreset failed (device not ready) ata2: limiting SATA link speed to 1.5 Gbps ata2: hard resetting link ata2: softreset failed (device not ready) ata2: reset failed, giving up ata2.00: disabled ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: softreset failed (device not ready) ata2: hard resetting link ata2: link is slow to respond, please be patient (ready=0) ata2: softreset failed (device not ready) ata2: hard resetting link ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2: EH complete sd 1:0:0:0: [sdb] Unhandled error code sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 end_request: I/O error, dev sdb, sector 8396584 end_request: I/O error, dev sdb, sector 8396584 md: super_written gets error=-5, uptodate=0 raid1: Disk failure on sdb1, disabling device. raid1: Operation continuing on 5 devices. sd 1:0:0:0: [sdb] Unhandled error code sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 end_request: I/O error, dev sdb, sector 8396632 end_request: I/O error, dev sdb, sector 8396632 md: super_written gets error=-5, uptodate=0 sd 1:0:0:0: [sdb] Unhandled error code sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 end_request: I/O error, dev sdb, sector 654934840 raid10: sdb3: rescheduling sector 1788594488 sd 1:0:0:0: [sdb] Unhandled error code sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 end_request: I/O error, dev sdb, sector 1311583568 raid10: Disk failure on sdb3, disabling device. raid10: Operation continuing on 3 devices. Buffer I/O error on device dm-51, logical block 31930 lost page write due to I/O error on dm-51 Buffer I/O error on device dm-51, logical block 31931 lost page write due to I/O error on dm-51 Buffer I/O error on device dm-51, logical block 31932 lost page write due to I/O error on dm-51 Buffer I/O error on device dm-51, logical block 31933 lost page write due to I/O error on dm-51 sd 1:0:0:0: [sdb] Unhandled error code sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 end_request: I/O error, dev sdb, sector 1465147272 end_request: I/O error, dev sdb, sector 1465147272 md: super_written gets error=-5, uptodate=0 sd 1:0:0:0: [sdb] Unhandled error code sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 end_request: I/O error, dev sdb, sector 8396584 end_request: I/O error, dev sdb, sector 8396584 md: super_written gets error=-5, uptodate=0 sd 1:0:0:0: [sdb] READ CAPACITY(16) failed sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 sd 1:0:0:0: [sdb] Sense not available. sd 1:0:0:0: [sdb] READ CAPACITY failed sd 1:0:0:0: [sdb] Result: hostbyte=0x04 driverbyte=0x00 sd 1:0:0:0: [sdb] Sense not available. sd 1:0:0:0: [sdb] Asking for cache data failed sd 1:0:0:0: [sdb] Assuming drive cache: write through sdb: detected capacity change from 750156374016 to 0 raid10: sdb: unrecoverable I/O read error for block 1788594488 Buffer I/O error on device dm-59, logical block 204023 Buffer I/O error on device dm-59, logical block 204023 Buffer I/O error on device dm-43, logical block 24845 lost page write due to I/O error on dm-43 Buffer I/O error on device dm-62, logical block 558722 lost page write due to I/O error on dm-62 Buffer I/O error on device dm-43, logical block 24846 lost page write due to I/O error on dm-43 RAID1 conf printout: --- wd:5 rd:6 disk 0, wo:0, o:1, dev:sda1 disk 1, wo:1, o:0, dev:sdb1 disk 2, wo:0, o:1, dev:sdc1 RAID1 conf printout: --- wd:5 rd:6 disk 0, wo:0, o:1, dev:sda1 disk 2, wo:0, o:1, dev:sdc1 disk 3, wo:0, o:1, dev:sdd1 disk 4, wo:0, o:1, dev:sde1 disk 5, wo:0, o:1, dev:sdf1 raid10: Disk failure on sdb2, disabling device. raid10: Operation continuing on 3 devices. raid10: sdb: unrecoverable I/O read error for block 0 RAID10 conf printout: --- wd:3 rd:6 disk 1, wo:1, o:0, dev:sdb2 disk 2, wo:0, o:1, dev:sdc2 disk 3, wo:0, o:1, dev:sdd2 disk 5, wo:0, o:1, dev:sdf2 RAID10 conf printout: --- wd:3 rd:6 disk 2, wo:0, o:1, dev:sdc2 disk 3, wo:0, o:1, dev:sdd2 disk 5, wo:0, o:1, dev:sdf2 md: md2: resync done. RAID10 conf printout: --- wd:3 rd:6 disk 1, wo:1, o:0, dev:sdb3 disk 2, wo:0, o:1, dev:sdc3 disk 3, wo:0, o:1, dev:sdd3 disk 5, wo:0, o:1, dev:sdf3 RAID10 conf printout: --- wd:3 rd:6 disk 2, wo:0, o:1, dev:sdc3 disk 3, wo:0, o:1, dev:sdd3 disk 5, wo:0, o:1, dev:sdf3 Cheers, Chris. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html