I'm in the midst of upgrading some of my data drives to 5GB drives.  I'm on my third drive that during the parity rebuild has contantly growing Reallocated Sector Ct.  I'm 1% into my parity rebuild and the count is already up to 368.  Like I said, this is the 3rd drive I'm trying, they have all done the same thing.  Could it be a really bad batch of drives?  Could it possibly be a bad backplane or connection?  I'm at a loss.  I can't believe this many drives would have the same issue.  Or is it no big deal and to be expected?  All drives have been Toshiba MD04ACA500.

 

Here's the current smart status:

# Attribute Name Flag Value Worst Threshold Type Updated Failed Raw Value

1 Raw Read Error Rate 0x000b 100 100 050 Pre-fail Always - 0

2 Throughput Performance 0x0005 100 100 050 Pre-fail Offline - 0

3 Spin Up Time 0x0027 100 100 001 Pre-fail Always - 8795

4 Start Stop Count 0x0032 100 100 000 Old age Always - 3

5 Reallocated Sector Ct 0x0033 100 100 050 Pre-fail Always - 368

7 Seek Error Rate 0x000b 100 100 050 Pre-fail Always - 0

8 Seek Time Performance 0x0005 100 100 050 Pre-fail Offline - 0

9 Power On Hours 0x0032 100 100 000 Old age Always - 36 (1d, 12h)

10 Spin Retry Count 0x0033 100 100 030 Pre-fail Always - 0

12 Power Cycle Count 0x0032 100 100 000 Old age Always - 3

191 G-Sense Error Rate 0x0032 100 100 000 Old age Always - 13

192 Power-Off Retract Count 0x0032 100 100 000 Old age Always - 0

193 Load Cycle Count 0x0032 100 100 000 Old age Always - 3

194 Temperature Celsius 0x0022 100 100 000 Old age Always - 38 (Min/Max 24/39)

196 Reallocated Event Count 0x0032 100 100 000 Old age Always - 46

197 Current Pending Sector 0x0032 100 100 000 Old age Always - 0

198 Offline Uncorrectable 0x0030 100 100 000 Old age Offline - 0

199 UDMA CRC Error Count 0x0032 200 253 000 Old age Always - 4

220 Disk Shift 0x0002 100 100 000 Old age Always - 0

222 Loaded Hours 0x0032 100 100 000 Old age Always - 36

223 Load Retry Count 0x0032 100 100 000 Old age Always - 0

224 Load Friction 0x0022 100 100 000 Old age Always - 0

226 Load-in Time 0x0026 100 100 000 Old age Always - 205

240 Head Flying Hours 0x0001 100 100 001 Pre-fail Offline - 0

 

If you have any advice/help, let me know.

Thanks,

Reallocated sectors are due to the drive itself. Not due to cable connections or controller issues. Tiny chance they could be induced if the power supply is weak - but I have never seen it.

 

I know a number of users, me included, have bought these Toshibas and not had reallocated sectors. I can only guess that maybe they were damaged in shipping or a bad run of drives.

 

I'd return them all as defective and get new ones. Hopefully the next batch will be fine.

Thank you for the reply, they've all been hooked up in a Norco 4224 so I'd be really surprised a power cable would be the issue since I'm not seeing it on the other drives on that backplane.

Hopefully Amazon is okay with all the returns I've been doing:)

Thanks,