On Sat 04 Jul 2015 04:38:18 PM you wrote:

quoted

quoted

6.00: ATA-8: ST3000DM001-9YN166, CC4H, max UDMA/133

 ata6.00: 5860533168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
 ata7.00: ATA-9: ST3000DM001-1CH166, CC27, max UDMA/133
 ata7.00: 5860533168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
 ata8.00: ATA-9: ST3000DM001-1CH166, CC27, max UDMA/133
 ata8.00: 5860533168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
 ata5.00: ATA-9: ST3000DM001-1CH166, CC27, max UDMA/133
 ata5.00: 5860533168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
 ata6.00: configured for UDMA/133
 ata4.00: ATA-9: ST3000DM001-1CH166, CC27, max UDMA/133
 ata4.00: 5860533168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA

OWWWWW OWWWWWW OWWWWW

Are these 3TB Seagate Barracudas? (Same as mine). You DO NOT want to be
running raid 5 or 6 on these things !!!! They're desktop drives not
meant for raid.

They do not support ERC. *One* *soft* failure on these and you run a
good chance of trashing your array !!!!

Make sure you've got your raid timeout increased - there's plenty of
threads about how to do it - otherwise one disk hiccup for any reason
is
likely to cause a cascade of failures !!!!

You need to upgrade them to Western Digital Reds or similar asap.

Cheers,
Wol

Hi Wol,

Yes, these are the 3GB Seagates. They have been running 24/7 for about 3
years now. I lose a drive occasionally, replace and rebuild. I will
consider the REDs for the next time I do an upgrade - I imagin I would
have to replace all 7 drives at once. How about the Seagate NAS HDDs?

I've just been replacing my desktop drives (all seagates, 1, 2 and 3 TB) as 
they fail. I've got 5 WD REDs now, in two separate arrays. I think 2 2TB REDs 
(out of 7 drives total) in my main NAS raid5 array (If I had room for one more 
drive, I'd make it a raid6), and 3 3TB REDS (out of 6 main drives, one hot 
spare, and one cold spare) in my backup raid6 array.

Yeah, I've become paranoid enough that I have a full backup of the main NAS 
array now. I actually had to use it recently, due to a really stupid mistake 
I'd rather not talk about that wiped the filesystem ;D probably half of the 
array "failures" I've had were pebkac, so having a full backup copy is 
incredibly important for me. The backup array also stores backups of my 
/important/ rsnapshot backups of my machine configs, documents, and other 
important things.

I will look at the the raid timeout. Thank-you for the tip.

- Justin

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-- 
Thomas Fjellstrom
thomas@fjellstrom.ca