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RAID 0 Help

post #1 of 7
12/22/03 at 10:26pm
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I have two drives in my 8890 -- both are Toshiba, 1st is 60GB and second is 80GB. I had previously formatted them seperately and worked fine. Need a clean install and decided to give RAID 0 a shot. The FastTrack util tells me that I have 140GB but WinXP install only gives me 114455 MB (for a los of 25 GB?) Any ideas on what might be the problem?

Thanks

PS - Do the drives need to be identical in order to have it work correctly? FastTrack is actually showing 120GB combined, exactly double the 60GB drive).
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post #2 of 7
12/22/03 at 11:55pm
I think this depends on the RAID controller, but in general, YES the drives need to be the same. I've never tried a hardware RAID with different sized drives.

-myrkat
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post #3 of 7
12/22/03 at 11:56pm
I am pretty sure that raid will not work with out two identical drives.
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post #4 of 7
12/23/03 at 12:02am

Raid

Quote:
Originally Posted by NavyGuy
I have two drives in my 8890 -- both are Toshiba, 1st is 60GB and second is 80GB. I had previously formatted them seperately and worked fine. Need a clean install and decided to give RAID 0 a shot. The FastTrack util tells me that I have 140GB but WinXP install only gives me 114455 MB (for a los of 25 GB?) Any ideas on what might be the problem?

Thanks

PS - Do the drives need to be identical in order to have it work correctly? FastTrack is actually showing 120GB combined, exactly double the 60GB drive).
The drives do NOT have to be the same size, but they will fall back to the smaller of the 2 sizes.

So in your case, it is acting like there are 2 60 gig drives
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post #5 of 7
12/23/03 at 5:43am
I thought they had to be the same size and speed?
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post #6 of 7
12/23/03 at 5:24pm
Quote:
Originally Posted by DarphBobo
The drives do NOT have to be the same size, but they will fall back to the smaller of the 2 sizes.

So in your case, it is acting like there are 2 60 gig drives
You are correct. This is what I meant to say. You will have the "least common denominator" for the drives involved.

Same goes for speed. They'll operate at the slowest drive's performance levels (however, drive cache pretty much nullifies this).

-myrkat
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post #7 of 7
12/24/03 at 2:05am
99% correct about the lowest common denominator thing. The size will be based on 2 x the smallest drive. Speed wise you will be constrained by the slowest drive (RPM, seek times, cache size). What will happen is that the faster drive will complete its read or write first that data will be made available then the slower drive will complete and its data made available. You will see a speed up but it will not be as great as if you had two drives of equal performance.
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