On Thu, Mar 11, 2010 at 3:51 AM, Iain Rauch <groups@xxxxxxxxxxxxxxxxxxxxxx> wrote: > Smartd emailed me to say I have "1 Currently unreadable (pending) sectors". > This actually happened for two disks now. > > I ran a check and then a repair on my array and they both gave mismatch_cnt > of 8. > > I ran a long self-test on both and they completed without error with no > errors logged. Yet the 'Current_Pending_Sector' is still 1 on both, and one > disk also has a 'UDMA_CRC_Error_Count' of 1. > > I ran 'hdrecover' on both and they are both telling me "Couldn't recover > sector 2930277168". It's asking if I want to overwrite it with zeros to fix > it, but I would assume this will damage my array? > > The disk sizes are 1500301910016 bytes and I use 1500250M partition sizes > for the array components. Does that sector fall outside my partition, and > hence would it be safe to overwrite it with zeros? > > Also, why did I have a mismatch_cnt? I haven't run another check since I did > the repair, as I wanted to fix the pending sector. > > BTW, I have a 15 drive RAID6. > > Hope y'all can help. > > > Iain > > > -- > 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 > If you are running RAID6 and it can read from all but two drives then it should still be able to calculate whatever would match the remaining (presumed good) reads to fill the later two drives. RECENT kernels will try to write over failed sectors automatically; and only kick the drive if the write fails. Please provide more information. Kernel version mdadm version Information about how the source block devices are split up before mdadm sees them, and any related messages from the system-log. The relevant section should be near the end of a dmesg output when you've just completed a check or repair. Your syslog probably already captured the same data and stored it elsewhere. -- 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
