[CentOS] [OT] 8-15 TB storage: any recommendations?

Matty matty91 at gmail.com
Fri Jan 8 19:23:14 UTC 2010


On Thu, Jan 7, 2010 at 12:01 PM, Thomas Harold <thomas-lists at nybeta.com> wrote:
> On 1/7/2010 10:54 AM, John Doe wrote:
>> From: Karanbir Singh<mail-lists at karan.org>
>>> On 01/07/2010 02:30 PM, Boris Epstein wrote:
>>>> KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
>>>> what are you referring to as spindle?
>>>
>>> disk. it boils down to how much data do you want to put under one
>>> read/write stream.
>>>
>>> the other thing is that these days 1.5TB disks are the best
>>> bang-for-the-buck in terms of storage/cost. So maybe thats something to
>>> consider, and limit disk usage down initially - expand later as you need.
>>>
>>> Even better if your hba can support that, if not then mdadm ( have lots
>>> of cpu right ? ), and make sure you understand recarving / reshaping
>>> before you do the final design. Refactoring filers with large quantities
>>> of data is no fun if you cant reshape and grow.
>>
>> I also heard that disks above 1TB might have reliability issues.
>> Maybe it changed since then...
>>
>
> I remember rumors about the early 2TB Seagates.
>
> Personally, I won't RAID SATA drives over 500GB unless they're
> enterprise-level ones with the limits on how long before the drive
> reports a problem back to the host when it has a read error.

I'm with you on that one. We currently use RAIDZ2 to allow us to lose
2 drives in our storage pools, and will definitely move to RAIDZ3 at
some point down the road. Luckily for us ZFS re-silvers just the
blocks that contain data / parity when a failure occurs, so a disk
failure is usually remedied in an hour or two (we devote two disks as
spares).

- Ryan
--
http://prefetch.net


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