Re: Performance query about large tables, lots of concurrent access

Andrew Sullivan wrote:
> On Thu, Jun 21, 2007 at 12:29:49PM -0400, Karl Wright wrote:
>   
>> I checked the disk picture - this is a RAID disk array with 6 drives, 
>> with a bit more than 1Tbyte total storage.  15,000 RPM.  It would be 
>> hard to get more/faster disk than that.
>>     
>
> What kind of RAID?  It's _easy_ to get faster disk that 6 drives in
> RAID5, even if they're 15,000 RPM.  The rotation speed is the least
> of your problems in many RAID implementations.

Oh, and the driver rev means a lot too.  Some older driver revisions for 
some RAID cards are very slow.