topic 10K and 15K drives, same controller in Disk Enclosures

10K and 15K drives, same controller

Robert Grosshandler — Mon, 01 Nov 2004 11:57:47 GMT

I'd like to get a little more performance out of a ML 570. I'm using 10K drives right now in 5 logical disks. One of those logical disks is used way more (a search function). I can't add another drive to the array, but I can upgrade that logical disk from 10K disks to 15K disks.

So, can I have 15K disks for one logical drive, and 10K disks for my other logical drives, and get performance improvement?
It'd be 36GB disks, probably.

Thanks,

Re: 10K and 15K drives, same controller

Uwe Zessin — Mon, 01 Nov 2004 12:17:43 GMT

Sounds like you are using a SmartArray controller and did create one logical disk per disk drive array. You can mix 10k and 15k RPM disk drives, even in the same disk drive aray.

Re: 10K and 15K drives, same controller

Peter Mattei — Tue, 02 Nov 2004 02:32:15 GMT

As Uwe said: You can mix drives (speed and size)

In order to improve performance I would build arrays consisiting of multiple drives and then create logical disks.
This way your IOs are evenly spread over all disks in an array and a single drive will not become a "hot spot".

Cheers
Peter

Re: 10K and 15K drives, same controller

e4services — Tue, 02 Nov 2004 09:12:25 GMT

To confirm, yes, 36GB and 73GB 15K drives are available right now. But a new generation is due for release this quarter that will bring even high capacity 146GB 15K drives with 3.3-msec average read and 3.8-msec average write seek times. Also coming is the new 300GB 10K SCSI.

Re: 10K and 15K drives, same controller

Robert Grosshandler — Tue, 02 Nov 2004 10:27:59 GMT

right on. Thanks.