View Full Version : will these two hard-drive run raid together
sandman001
08-05-04, 09:17 PM
I have two 60gig 2mb cahce hard-drives.
One is an IBM deskstar, and one is a Westerdigital. Should these have any problems running raid together. Specifically raid-o?
greenman100
08-05-04, 09:52 PM
and the westerndigital is a WD600BB
there shouldn't be any problems.
sandman001
08-06-04, 12:00 PM
Alright, awesome. thanks.
Cjwinnit
08-06-04, 12:13 PM
They will run together, but it won't quite be as fast as two identical disks. Although they both say "60 GB" they are slightly different sizes. I think IBM drives are about 61.4 GB.
Other than that they should make a decent RAID.
sandman001
08-06-04, 01:19 PM
the IBM says it's 57.4gigs.
Cjwinnit
08-06-04, 01:43 PM
the IBM says it's 57.4gigs.
the partition on my IBM disk, which takes up 100% of available space and if FAT32 formatted, takes up 61,477,126,144 bytes total. Hence 61.4 GB or 57.4 GiB). Remember, GB = 10^9 bytes, GiB = 2^30 bytes.
It's 120,103,200 sectors according to the label.
sandman001
08-06-04, 02:18 PM
Ahh yea, forgot about that.
theELVISCERATOR
08-06-04, 03:02 PM
you may end up data issues..if drives are not identical but ymmv
alien dork
08-06-04, 04:17 PM
so you are saying that to have a raid, you do not need two drives with identical sizes(down to the bit)? so how does it work? it takes the smallest size drive and use that size as the max size for the second drive ? is that what it is doing? explaination please. !
Yup, if the drives are of two different sizes, the size of the RAID array depends on the smaller of the two. The remaining space might be able to be partitioned off, but I haven't run a RAID to really know.
JigPu
Cjwinnit
08-06-04, 05:00 PM
The remaining space might be able to be partitioned off, but I haven't run a RAID to really know.
Unfortunately no. A hard disk can only as an ATA standalone drive or as part of a (hardware) RAID, but not both. When you use different drives with different spaces available, it does as you said. The remaining space is truncated (unused). If you destroy the RAID and reformat the drive, you can then use all the space of the drive.
maybe it's possible as part of some wacky software RAID but certainly not as hardware RAID as the RAID chip must be configured as ATA or RAID. in RAID mode, the drives are not individually available for data storage and must be addressed as part of the RAID.
Ah, thank you for that info Cjwinnt :)
JigPu
sandman001
08-30-04, 05:34 PM
Just an update, it works fine. Don't notice much of an advantage, but it's working.
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