Spec of Hard Disks When Using RAID 1 Mirroring

Computer Forum Storage Devices
1

Hi There peeps

Just wondered if you could help.

I have a server with 2 SATA Maxtor 200gig, 150 HDD’s in

I have a spare SATAII Maxtor 200gig, 3.0gb hard disk

if one of the server disks goes wrong can i slap the new in and start mirroring again.

the only difference i can see between the spare hard disk and the ones in the server is this transfer rate if thats what it is - server ones are 150mbps but new one 3.0gb, however both are the same size

Or do they have to be the identical model in every way both in capacity and transfer rate - everything else is the same - buffer rate, seek time etc

thank you in advance

2

Well, since the SATA I and SATA II transfer speeds really represent maximum transfer speeds, not sustained speeds, that won’t matter much—if at all.

Where you’ll run into issues is if you mirror the 150GB. You will loose 50GB of useable space due to the nature of the RAID array basing the array on the smallest disk size. That’s where you’ll hurt the most.

3

cheers for the reply fella

i prolly did not make myself clear - both 2x server disks are 200gig in capacity and so is the spare 200gig

the only diff appears to be the transfer rates ones 150mbs the other is 3.0gb

assume based on what to you wrote i have nothing to worry about?

4

I think Big B was trying to tell you that the SATAI and SATAII drives won’t be running at that max speed, so they probably will work.

5

[QUOTE=PompeyFC]

assume based on what to you wrote i have nothing to worry about?
[/QUOTE]

Yup.