Re: [CentOS] Drive failed in 4-drive md RAID 10

I got the email that a drive in my 4-drive RAID10 setup failed. What are my options?

Drives are WD1000FYPS (Western Digital 1 TB 3.5" SATA).

mdadm.conf:

# mdadm.conf written out by anaconda MAILADDR root AUTO +imsm +1.x -all ARRAY /dev/md/root level=raid10 num-devices=4 UUID=942f512e:2db8dc6c:71667abc:daf408c3

/proc/mdstat: Personalities : [raid10] md127 : active raid10 sdf1[2](F) sdg1[3] sde1[1] sdd1[0] 1949480960 blocks super 1.2 512K chunks 2 near-copies [4/3] [UU_U] bitmap: 15/15 pages [60KB], 65536KB chunk

smartctl reports this for sdf: 197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always

•   1
  

198 Offline_Uncorrectable 0x0010 200 200 000 Old_age Offline

•   6
  
  

So it's got 6 bad blocks, 1 pending for remapping.

Can I clear the error and rebuild? (It's not clear what commands would do that.) Or should I buy a replacement drive? I'm considering a WDS100T1R0A

Hi,

mdadm --remove /dev/md127 /dev/sdf1

and then the same with --add should hotremove and add dev device again.

If it rebuilds fine it may again work for a long time.

Simon

(2.5" 1TB red drive), which Amazon has for $135, plus the 3.5" adapter.

The system serves primarily as a home mail server (it fetchmails from an outside VPS serving as my domain's MX) and archival file server.

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