10k/15k disc drives

[malvin drakley]

I am configuring a netserver with a Net RAID 1M controller and have 3 18 gb Discs, 2 of which are 10k drives and the 3rd is a 15K drive. will this pose a problem running on the Net RAID controller? These have all been supplied as P2473A although the 15K drive says P2507A on it.

[Alexander M. Ermes · Accepted solution]

Hi there.
You can setup two disks with raid 1 thru 5
and leave one on its own under raid 0 to store data on it, which are not that hot or you get a fourth disk of the same size.
( just my opinion ).
Rgds
Alexander M. Ermes

[paul courry]

FYI, the array will run at the speed of the slowest disk. I.E. the 10K.

[Marino Meloni_1]

hi
it is not supported and not suggested to put hdd with differnt speed in a same raid under a netraid controller 1si, in fact the different speed of hdd can cause time out on the scsi bus, in the past this problem was well knon with hdd of 10 k vs hdd of 7,2k. So in you want avoid truble, don't mix differents hdd on the same array.
bye
marino

[Marino Meloni_1]

hi
the speed of a hdd cannot be changed, if the speed is 15.000, this rpm are gived by the motor which cannot be controlled .
so the speed nerver could go down to 10.000 rpm
the only thing which can be negotiate is the speed of the communication (U3, Ue, 160 Mb, 80 Mb,..)
bye
marino

[malvin drakley]

Thanks for all the replies, the disc was replaced on Friday by the supplier so there is no problem any more. They are all running at 10k. Thanks again
malvin

[John Pierpoint]

I have a similar problem on another HP system.
I need to add another drive to the existing RAID array on an HP Proliant ML370G3, with Smartarray 642 card. The existing 3 36GBHDDs are 10k.
As I can't get a 10k 36GB drive any more, will a 15k 36GB HDD work?

Or would I be better off using a 10k 72GB HDD (and effectively wasting half of it)?

Or have I got to replace the whole lot?

Regards,

John.