RAID arrays and NBM
Novell Cool Solutions: Question & Answer
Reader Rating 
Q:
What's the best RAID-array configuration for NBM?
A:
Here's my opinion: For the sys volume, just mirror the drives (raid 1) for redundancy. Then put the cache on a single TFS volume on a different phyisical drive (using 16k blocks, no compression, no suballocation). If your throughput and load *really* demands a faster, larger cache, make them separate volumes on individual disks instead of doing RAID5 or 0 or anything else. Having multiple, separate spindles on separate volumes allows NBM to maniplate the cache directory structure most efficiently. Data redunancy like
RAID5 on a cache is not necessary, and actually hurts performance.
That said, users in general seems to overestimate how much cache they
really need, and they often use far too much.
Novell Cool Solutions (corporate web communities) are produced by WebWise Solutions. www.webwiseone.com