[Tfug] And another one down

Harry McGregor micros at osef.org
Mon Sep 9 22:45:36 MST 2013

On 9/9/13 10:22 PM, Timothy D. Lenz wrote:
> On 9/9/2013 10:07 PM, Harry McGregor wrote:
>> On 9/9/13 9:52 PM, Timothy D. Lenz wrote:
>> <snip>
>> If the Seagates were not "array" optimized drives, then they quite
>> likely were going into thermal recalibration, which takes the drive
>> offline for a few seconds and brings it back.
>> My personal opinion, dealing with thousands of drives, is that I really
>> like the HGST drives, and don't care much for Seagate anymore (and this
>> is enterprise class, near line sas and enterprise sata).  After HGST, I
>> go for WD SAS, then WD Black, then Red.  I don't like either the Blue or
>> the Green for array use.
>> As far as the fans causing problems, I have seen some VERY odd things
>> cause drive problems, but have yet to see fans cause it...
>> (and yes, I deal with enterprise storage as part of my job).
>> -Harry
> I don't think I have ever heard of an HGST drive, but a quick google
> found a 600Gb drive for $400... OUCH.

HGST is what used to be Hitachi Global Storage Technologies, which
before that was IBM's drive division.  HGST is now owned by WD, but
operated as a separate company due to restrictions the Chinese
government put on the merger.

They are not all that expensive, you were probably looking at a 10K or
15K SAS drive for that range.

Here is a 1TB ultrastar with 3 year warranty for $85:
> I just noticed that WD has other drives now besides the
> red/green/black/blue. Haven't looked into then much. But looking at
> WD's site: http://www.wdc.com/en/products/catalog/
> I don't see an SAS line. Why black before red? I thought red was
> designed for array use.

The WD Xe line is SAS, and the WD Re line has some SAS drives.  The
black vs red is more speed vs array optimized.  The Blacks are supported
in consumer level arrays, and are 7200 RPM, the Reds are "intellipower"
which means they are in the 5900 RPM range.

Of course SAS will only help you if you have SAS Controllers, which most
consumer level boards and small NAS appliances don't have.

Here is a 2TB WD RE SAS drive:

>  And yea, just reading on the green, I haven't given them another
> thought.

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