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
(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.