Windows XP SP2 Pro question?

[decapitator]

This is a strange one, I did Raid 0 and in device mgr it reports it as such, but when I do properties under "My Computer" it shows it as one single drive with only 74gig :confused:

[sirholio]

What are the drives you did this on? and are you sure it was a raid 0

[hulksterjoe]

why is that strange? .. you've got 2 74 gig drives set up as a raid 0.. The capacity of a raid 0 array is equal to 1 drive..but your pulling from 2 sources the raid controller lists them as 2 drives but windows reports it as a single... could you imagine having a raid 5 array or anny array with each drive being report to the average joe on a network,, they'd go crazy trying to figure out which disk to click...30 drives in a raid 5 is still reported by windows as 1 large disk

[decapitator]

why is that strange? .. you've got 2 74 gig drives set up as a raid 0.. The capacity of a raid 0 array is equal to 1 drive..but your pulling from 2 sources the raid controller lists them as 2 drives but windows reports it as a single... could you imagine having a raid 5 array or anny array with each drive being report to the average joe on a network,, they'd go crazy trying to figure out which disk to click...30 drives in a raid 5 is still reported by windows as 1 large disk

I understand that it reports as one big drive but if they are 74gig each should it not report 148gig total rather then 74?

[decapitator]

What are the drives you did this on? and are you sure it was a raid 0

Sorry, I don't understand why my signature did not show up. Two 74GB raptors.

[-l-Z3K3-l-]

I understand that it reports as one big drive but if they are 74gig each should it not report 148gig total rather then 74?

hmmm you should see nearly all the space alright as theres no parity on a RAID 0 config.
to be hoenst i've no idea why this is happeneing to you
is there somethig in the BIOS that is set wrong?
Are you sure its RAID 0 and not RAID 1?

[hulksterjoe]

I just read this again.. my bad raid zero is striping you should see the larger amount raid 1 you lose the 2nd drive

[MorfiusX]

The RAID 0 array needs to be created before Windows does anything with it. Then you create a partition. If you have created the partition before the array, the partition table already exists and will not be resized. That's the only thing I can think of that might be causing your problem.

[djnes]

Check your RAID settings in the RAID controller's BIOS. It sounds more like you set it up for mirroring instead of striping. If not, take it as a sign to stop using RAID0. See the storage forum stickies for the proof.

[decapitator]

Thanks guys.

[nomak]

any raid 0 or 3 or 5 configuration is gonna use the smallest size of the disks combined to create its total size of storage space.. so if you have a 20GB and a 30GB it will show up as a 20 gig raid setup and you lose the remaining ten gig on the 30 gig HDD.. So in your case you have two 74GB drives its only gonna report 74GB total amount of space.. HTH

[djnes]

any raid 0 or 3 or 5 configuration is gonna use the smallest size of the disks combined to create its total size of storage space.. so if you have a 20GB and a 30GB it will show up as a 20 gig raid setup and you lose the remaining ten gig on the 30 gig HDD.. So in your case you have two 74GB drives its only gonna report 74GB total amount of space.. HTH
I can't say for RAID3, but those aren't the calculations for total size in RAID0 and RAID5. RAID0 is the total size of the disks, so for two 74 GB Raptors, the array size should be 148 GB. RAID5 needs at least 3 drives I think, and is always the total capacity of the drives, minus one single drive. So with 4 20GB drives in RAID5, you'd have 80-20= a 60GB array.

[nomak]

I can't say for RAID3, but those aren't the calculations for total size in RAID0 and RAID5. RAID0 is the total size of the disks, so for two 74 GB Raptors, the array size should be 148 GB. RAID5 needs at least 3 drives I think, and is always the total capacity of the drives, minus one single drive. So with 4 20GB drives in RAID5, you'd have 80-20= a 60GB array.


your right on the RAID 5 and I think is the same on a RAID 3 but on the RAID 0 setup Storage capacity is determined by the smallest drive in the array. That capacity is then applied to format all other drives in the array. If for example you are using a 1GB, 2GB and 5GB drive in a RAID-0 array, your system will see one drive of 3GB (1GB x 3) versus the normal seperate counted 8GB.

now there may be a trick around this to see the total of all drives combined but I dont know of one off hand..

On another note isnt spanning what allows you to see the amount of both disks as one.. 2x 74 gb drives = 148GB ??

[djnes]

You were right about the different sized drives. If you tried to make a RAID0 array of a 20 GB and 40 GB drives, you would have a 40 GB array, as if you used 2 20GB drives.