On Monday 07 of December 2015, John Stoffel wrote: > Arkadiusz> 4.3.0 kernel, raid6 array: > > I think there's a bug in the 4.3.x and 4.4-rc3 and lower with block > merges. I ran into these over the weekend, where v4.2.6 was stable, > but anything higher would lock up and crash on me. Well, no crashes here. > So first step would be to make sure you get and test v4.4-rc4. Do you know which commit there? > > Arkadiusz> md7 : active raid6 sdg[10] sdad1[9] sdac1[8] sdag1[7] sdaf1[6] > sdae1[5] sdaj1[4] sdai1[3] sdah1[2] sdn1[1] Arkadiusz> 31255089152 > blocks super 1.2 level 6, 512k chunk, algorithm 2 [10/10] [UUUUUUUUUU] > Arkadiusz> bitmap: 1/30 pages [4KB], 65536KB chunk > > Arkadiusz> array had weird failure where many disks went into failed state > but Arkadiusz> remove && adding these disks "fixed" it (turns out not > really fixed it). > > Arkadiusz> Unfortunately now some reads fail: > > Arkadiusz> pread(4, 0x1483a00, 4096, 16003680464896) = -1 EIO (Input/output > error) > > Arkadiusz> To reproduce used xfs_io > Arkadiusz> xfs_io -d -c "pread 16003680464896 4096" /dev/md7 > Arkadiusz> pread64: Input/output error > Arkadiusz> which does pread exactly as shown above. > > Arkadiusz> write also fails for that area: > Arkadiusz> xfs_io -d -c "pwrite 16003680464896 4096" /dev/md7 > Arkadiusz> pwrite64: Input/output error > > Arkadiusz> Note that nothing is written in dmesg when that happens. > > Arkadiusz> I've tried various offsets and sizes of pread and at some point > that was logged: Arkadiusz> [ 848.988518] Buffer I/O error on dev md7, > logical block 3907148544, async page read > > Arkadiusz> but no error from underlying devices. > > Arkadiusz> List of bad blocks: > Arkadiusz> http://sprunge.us/XSWI > > Arkadiusz> What can I do now? > > Arkadiusz> (loosing data from that few sectors is acceptable if the rest > will be readable) > > Arkadiusz> Thanks, > Arkadiusz> -- > Arkadiusz> Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org ) > Arkadiusz> -- > Arkadiusz> To unsubscribe from this list: send the line "unsubscribe > linux-raid" in Arkadiusz> the body of a message to > majordomo@xxxxxxxxxxxxxxx > Arkadiusz> More majordomo info at > http://vger.kernel.org/majordomo-info.html -- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org ) -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
