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Mixing drive spindle speeds in an array

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Mark Johnstone_3
Occasional Contributor

Mixing drive spindle speeds in an array

I have a new DL 380 G4 server to build using 2 x Ultra 320 SCSI drives attached to the 6i controller. The 2 drives I have been supplied with are different spindle speeds, 10K and 15K. Is mixing different spindle speeds in the same mirror or RAID 5 array supported?
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Ivan Ferreira
Honored Contributor
Solution

Re: Mixing drive spindle speeds in an array

Yes you can, but the performance will be degraded/reduced/limited by the slowest disk in the array.

If it is a new server, can you ask to you provider to supply two 15K rpm disks?
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
e4services
Honored Contributor

Re: Mixing drive spindle speeds in an array

Actually the spindle rotational speed effects the access and write speeds to the drive itself and is transparent to the controller. Once the command is sent to the drive, how fast the drive completes the command is not a concern to the controller.
End result is one drive will complete processes 33% faster than the other. Doesn't hurt anything but the controller/system is always waiting for the slower to complete.
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