On 4 November 2011 15:31, Alex <mysqlstudent@xxxxxxxxx> wrote: > Hi, > >>> Can you point me to instructions on the best way to replace a disk? >> >> First run "repair" on the array, hopefully it'll notice the unreadable >> blocks and re-write them. >> >> echo repair >> /sys/block/md0/md/sync_action >> >> Also make sure your OS does regular scrubs of the raid, usually this is done >> by monthly runs of checkarray, this is an example from Ubuntu: > > Great, thanks. I recalled something like that, but couldn't remember exactly. > > The system passed the above rebuild test on both arrays, but I'm > obviously still concerned about the disk. Here are the relevant > smartctl lines: > > ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE > UPDATED WHEN_FAILED RAW_VALUE > 1 Raw_Read_Error_Rate 0x000f 108 089 006 Pre-fail > Always - 0 > 3 Spin_Up_Time 0x0003 094 094 000 Pre-fail > Always - 0 > 4 Start_Stop_Count 0x0032 100 100 020 Old_age > Always - 29 > 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail > Always - 0 > 7 Seek_Error_Rate 0x000f 083 060 030 Pre-fail > Always - 209739855 > 9 Power_On_Hours 0x0032 074 074 000 Old_age > Always - 22816 > 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail > Always - 0 > 12 Power_Cycle_Count 0x0032 100 100 020 Old_age > Always - 37 > 187 Reported_Uncorrect 0x0032 095 095 000 Old_age > Always - 5 > 189 High_Fly_Writes 0x003a 100 100 000 Old_age > Always - 0 > 190 Airflow_Temperature_Cel 0x0022 075 064 045 Old_age > Always - 25 (Min/Max 23/32) > 194 Temperature_Celsius 0x0022 025 040 000 Old_age > Always - 25 (0 18 0 0) > 195 Hardware_ECC_Recovered 0x001a 057 045 000 Old_age > Always - 51009302 > 197 Current_Pending_Sector 0x0012 100 100 000 Old_age > Always - 2 > 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age > Offline - 2 > 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age > Always - 0 > 200 Multi_Zone_Error_Rate 0x0000 100 253 000 Old_age > Offline - 0 > 202 Data_Address_Mark_Errs 0x0032 100 253 000 Old_age > Always - 0 > > Pending_sector and uncorrectable are both greater than zero. Is this > drive on its way to failure? > > Can someone point me to the proper mdadm commands to set the drive > faulty then rebuild it after installing the new one? > > Thanks again, > Alex > -- > 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 > 187 Reported_Uncorrect 0x0032 095 095 000 Old_age Always - 5 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 2 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 2 This tells me to get rid of the drive. I don't know the mdadm commands from my head, sorry, but it's in the man page(s). If you want you run a scrub and see if these numbers change. If the drive fails hard enough then md will kick it out of the array anyway. Btw, I scrub my RAID6 (7 HDDs) once a week. /Mathias -- 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
