[CentOS] hard drive question - WD red

[m.roth at 5-cent.us]

Tom

   Please don't top post.

Tom Bishop wrote:
> On Mon, Apr 22, 2013 at 3:09 PM, <m.roth at 5-cent.us> wrote:
>
>> Tom Bishop wrote:
>> > On Mon, Apr 22, 2013 at 2:50 PM, <m.roth at 5-cent.us> wrote:
>> >
>> >> I see a really good price, and better for quantity, for 3TB drives.
>> >> Now, I've been down on WD for a couple of years, since I found that
>> >>  they'd protected certain h/d parms from being changed (like TLER).
>> >> The ones  I'm looking at are the Red, which seems to be a new color
>> >>  (at least to me), and one technical review I've read says that
>> >>  they're intended for NAS, etc, and you can adjust those parms.
>> >> They're *not* supposed to be "enterprise" or server grade, but it
>> >> sounds like they'd work with RAID.
>> >>
>> >> Anyone know anything about them?
>>
>> > They are made more for the soho environment, not sure I would even use
>> > them there.  If its critical enough for RAID environment then I would
>> > use the enterprise class drives WD-RE or the Seagate equiv.  IIRC they
>> > were not even spinning those at 7200rpm, i just pony up for the good
>> > ones, and I'm cheap ;)
>>
>> Yeah, well, I work for a federal contractor, so this is your and my tax
>> dollars (and when someone starts spouting that all feds spend money like
>> water, I'm going give them a cluex4...).
>>
>> But, after reading your comments, and looking and seeing a similar
>> comment on Tom's Hardware, I called their support - they even have a tech
>> support 24x7 specifically for red, and the tech, when I asked, didn't even
>> blink when he told me it was 7200 full speed....
>>
>> And have you looked at the price for server grade anything? They want
>> 2-3 times the base price.
>>
>> Thanks, though, for such a quick response... and helping push me to
>> call.
>>
> Sure but if you read WD on documentation on at least parity RAID
> requirements, that specify URE 10^15, and these list out to 10^14.  If you
> are going to run RAID 5 or 6 with the 3gb disks, sounds like that might
> not be the best situation but something to think about.
>
Ah - good catch. Still, I don't think we'll be using them in RAID 6;
mostly, either for backups, or for just holding honkin' large datasets.
One issue, for example, are the Penguin servers that we have, with bloody
Supermicro m/bs (see that thread), and they demand the short TLER that WD
Greens and Blues don't do - they will keep trying for something like 2
*minutes*, not six seconds. These seem as though they might work, even
with those picky servers.

        mark