[Discuss] raid issues

[feenberg at nber.org (Daniel Feenberg)]

On Mon, 23 Jun 2014, Stephen Adler wrote:

> You guys have given me some great feed back. Thanks!
>
> Another question. As I try and configure this server which I'm getting
> for work, the key issue is its ability to have a lot of hot swappable
> disks. what I'm seeing these days is a migration to the 2.5" drives away
> from the 3.5". The problem is the 2.5" drives only go up to 1 terabyte,

HGST has 1.5 TB 2.5" drives, but only at 5400 RPM.

> while the 3.5" drives go up to 6 terabytes. so what's up with this 2.5"
> drive bit. The literature says that they consume less power (the 2.5"

People doing a lot of random access prefer more but smaller disks.

> drives) and are the favorite for data centers. But there's a factor of 3
> difference between the storage capacity and size. so the problem is that
> I have very few options when it comes to buying a rack mounted server
> with 3.5" hot swap-able drives. there seems to be a lot more rack
> servers with 2.5" drive bays.
>

Supermicro still has lots of servers with 3.5" disk slots. HP has some but 
they seem to require a special order with the suffix "LFF" (Large form 
factor). I don't see them on the website, but if you call and ask they 
are available. I don't know about 16 drives, though.

daniel feenberg

> Can anyone recommend a system with 16 3.5" drive bays?
>
> On Sun, 2014-06-22 at 14:14 +0000, Edward Ned Harvey (blu) wrote:
>>> From: discuss-bounces+blu=nedharvey.com at blu.org [mailto:discuss-
>>> bounces+blu=nedharvey.com at blu.org] On Behalf Of Bill Bogstad
>>>
>>> Actual media that you can take physically offline may still have merit.
>>
>> I've heard tons of horror stories where some company's data, including all backups, were destroyed instantly.  Not just redundancy, but backups too.
>>
>> I know of ONE company, where the only reason the company survived was because the CEO had a copy of the core IP on his iPod.
>>
>> Offsite and Offline.  No substitute.
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