Drives don't add up in RAID 0?

[gmjimmy]

I have two 150gb drives set up for RAID 0 in XP Pro 32 bit. Shouldn't my drive read 250gb in explorer or disk management? All I see is 149?
Thanks

 

[RebateMonger]

If the disks are running under a RAID chipset or a RAID card, then in Disk Management you should see a single disk of a size about double a 150 GB disk.

If the disk have been made dynamic and are running under Windows software RAID 0, then you'll see two disks in Disk Management and you'll see indications that they've been tied together in a RAID 0 array.

In both cases, you should see a single volume in Explorer of size 2x150 GB.

 

[Red Squirrel]

150+150 = 300 so if you did a raid 0 it should be 300. Now it wont quite be that because drive manufacturers don't size drives properly, I don't know why they do this, but by 1GB they really mean 1000 x 1000 x 1000 bytes when it should be 1024 x 1024 x 1024.

so 1GB for a drive manufacturer actually means ~0.931 GB So "150GB" is actually 139.698 which should make a raid array about 279.396.

 

[gmjimmy]

Windows Explorer and Disc manager see only one drive at 149 gb? When I boot up the message I get is Raid stripe 0 healthy?? (or similar)? Is there any other way to tell if this is set up properly? This system has been running for a long time like this and I never thought to check this out. Seems to run pretty quick?
Thanks

 

[Crusty]

What service pack are you running?

 

[RebateMonger]

I think we are all a bit confused by your numbers. Are you sure those aren't 160 GB hard drives. A single 160 GB disk will show up in Explorer and Disk Management as 149 GB. So will a RAID 1 array of two 160 GB disks.

 

[gmjimmy]

Sorry guys. I feel a little stupid. I was looking at specs I wrote down from a different computer not at the actual drives. I guess the specs I wrote down for this machine went with the other one?? Anyway I pulled the drives out to check them and they're both 80 gb drives in RAID 0 so it makes sense. Sorry for the confusion.