turbo@xxxxxxxxxx wrote:
I have a raid-5 array of six 250gb hard drives.
I just bought four 500gb hard drives.
I know I can take the six drives and make three raid-1 arrays of 500gb.
After doing that, can I make a raid-5 array consisting of the three
raid-0 arrays, and the four 500gb hard drives?
If you want performance and reliability, I would suggest migrating
everything to RAID-10, which will handle unequal size drives reasonably
well. In the medium term you may want to upgrade the 250=>500 just so
you can reduce your spare drive needs. And if your storage needs are
going to grow, you might consider winding up with RAID-6 and a hot spare.
LVM offers another solution, which also adds complexity, and in my
measurements hurts performance.
The short answer is that you can do what you asked, but it's more
complex and less reliable than is really desirable.
--
bill davidsen <davidsen@xxxxxxx>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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