Seagate SAS HDD realiability

[fossxplorer]

I'm considering to buy 5 of 6TB HDDs for a RAID6 setup.
Although Hitachi is my favorite due to it's reliability, i've seen some Seagate used for cheap. The models are ST6000NM0014 and ST6000NM0054, and are all 512e so 4K emulated as 512 i guess?

I know Seagate's consumer level HDDs have the worst reliability at Backblaze and i wonder how these enterprise SAS drives are in terms of reliability?

Thanks.

 

[andrewbedia]

I've seen their 2.5" SAS HDDs last 5+ years most of the time (some of them I saw died about 4 years in) when used 24/7. I'd say decent, but I haven't owned their 3.5" SAS HDDs long enough to say from personal experience.

Also, a lot of people here have experience with their NAS HDDs and I recall nothing but positive thoughts regarding them. Just stay away from their "Desktop HDDs".

 

[fossxplorer]

Ok, thanks a lot for your feedback. I forgot to add these were used ones so i've asked for SMART data if possible. And the date code of 14383 stays these are from early 2014, so already 2 years old, although i dunno how much power on time/usage. Is there a significant risk involved buying these used?

I had these in my mind too HGST 7K6000 HUS726060ALE614 (new) or HUS726060ALA640 (used).
HUS726060ALE614 costs ~ $240 in the US and 5 of such shipped to Europe with tax is gonna cost a fortune

 

[fossxplorer]

As we are talking about reliability of Seagate HDDs, now i see some errors on 1 of my 2 nearline SAS disks:
# smartctl -a /dev/sdf
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-504.8.1.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

Vendor: SEAGATE
Product: ST32000444SS
Revision: 0006
User Capacity: 2,000,398,934,016 bytes [2.00 TB]
Logical block size: 512 bytes
Logical Unit id: 0x5000c50040d3514f
Serial number: 9WM3V24R00009217FX34
Device type: disk
Transport protocol: SAS
Local Time is: Wed Oct 12 05:09:09 2016 EDT
Device supports SMART and is Enabled
Temperature Warning Enabled
SMART Health Status: OK

Current Drive Temperature: 31 C
Drive Trip Temperature: 68 C
Manufactured in week 49 of year 2011
Specified cycle count over device lifetime: 10000
Accumulated start-stop cycles: 37
Specified load-unload count over device lifetime: 300000
Accumulated load-unload cycles: 37
Elements in grown defect list: 0
Vendor (Seagate) cache information
Blocks sent to initiator = 2502323573
Blocks received from initiator = 2069179568
Blocks read from cache and sent to initiator = 472096877
Number of read and write commands whose size <= segment size = 243844950
Number of read and write commands whose size > segment size = 0
Vendor (Seagate/Hitachi) factory information
number of hours powered up = 20652.03
number of minutes until next internal SMART test = 33

Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 719121863 54 0 719121917 719121917 23271.422 0
write: 0 0 1 1 1 3326.172 0

Non-medium error count: 4

[GLTSD (Global Logging Target Save Disable) set. Enable Save with '-S on']
No self-tests have been logged
Long (extended) Self Test duration: 18500 seconds [308.3 minutes]

According to How do I interpret SMART data for SAS disks? it's not clear whether it's a risk or not of loosing data.
This is a RAID1 setup.


Any insights?