10000 RPM with 15000 RPM

10000 RPM with 15000 RPM

Post by ali » Wed, 07 Feb 2007 17:11:51


I have 6 15K RPM Ultra3 36.4 gb SCSI disks and 4 10K RPM Ultra3 36.4
gb SCSI disks. I want to make Raid5 for my server. I want to ask if
there could be a problem and if there won't be any problem, how will
be its performance compared to both 10K RPM and 15K RPM SCSI disks ?
 
 
 

10000 RPM with 15000 RPM

Post by Arno Wagne » Wed, 07 Feb 2007 19:48:54


What contoller? What OS? What filesystem? What application?

Arno

 
 
 

10000 RPM with 15000 RPM

Post by Folkert Ri » Thu, 08 Feb 2007 04:41:15


So many questions.
Why don't you just give him the different details per each brand
of controller, each brand of drive and each model of drive since
you are obviously such an expert, babblebot.
 
 
 

10000 RPM with 15000 RPM

Post by Folkert Ri » Thu, 08 Feb 2007 04:45:43


What does the manual say.


Presuming you mean "*all* 10K RPM and *all* 15K RPM SCSI "

How does 'inbetween' sound to you?
 
 
 

10000 RPM with 15000 RPM

Post by Bob Willar » Thu, 08 Feb 2007 07:46:41


Mixing RPMs should not be a problem, since current RAID hardware does not,
AFAIK, use spindle-sync.

I'd guess that performance would show 10K < mix < 15K, but it depends on
other HD params (and the workload and the phases of the moon, etc.) as
well as RPM.
--
Cheers, Bob
 
 
 

10000 RPM with 15000 RPM

Post by Mike Tomli » Fri, 09 Feb 2007 16:31:49

In article < XXXX@XXXXX.COM >, ali
< XXXX@XXXXX.COM > writes


I recently asked HP this same question, since their 36GB universal
hotplug disks are now only available in the 15k RPM flavour. Their
answer was that mixing disks with different rotational speeds within the
same array was unsupported and not recommended.

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10000 RPM with 15000 RPM

Post by timeOda » Thu, 22 Feb 2007 02:57:26


That sounds like business speak for "I don't know why it wouldn't work,
but I'd rather you just bought all new drives."