build out of a server advice

Merrill Oveson moveson at gmail.com
Fri Jun 22 16:17:09 MDT 2012


It will be a Windows 2008 server.  Does it handle RAID 6?

What's considered a large drive?  2 TB, 1.5 TB?

On Fri, Jun 22, 2012 at 3:14 PM, Lloyd Brown <lloyd_brown at byu.edu> wrote:
> At least with large, rackmount, enterprise arrays, the general consensus
> with large drives is to use 2-drive parity, eg. RAID6.  Depending on the
> load you put on the controller, there is a non-trivial chance that
> you'll have a second drive failure in the RAID-group during the time
> that you're rebuilding.  Frequently a rebuild on either RAID5 or RAID6
> with that big of a drive, might take 24-48 hours or more, sometimes
> longer.  Two failed drives in a RAID6 doesn't lose any data, but in a
> RAID5 it would.
>
> If you'll have a fairly light I/O load on the server, you might be able
> to get away with RAID5, since the reduced load will let the RAID
> controller (or kernel, for software-raid) spend more of its resources
> rebuilding when a drive does fail.
>
>
>
> Lloyd Brown
> Systems Administrator
> Fulton Supercomputing Lab
> Brigham Young University
> http://marylou.byu.edu
>
> On 06/22/2012 03:09 PM, Merrill Oveson wrote:
>> plug:
>>
>> Building a server:
>>
>> one 1 TB - for the OS and programs.
>>
>> four 3 TB raid 5 - which should give me 9 TB usable.  Correct?
>>
>> How reliable are the 3 TB drives these days?  Am I taking a big risk here?
>>
>> thoughts?
>>
>>
>> Thanks
>>
>> Merrill
>>
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