hard disk reliability

[Greg Lindahl]

>    Also what kind of experience have people had with different RAID
> levels, mainly RAID 5 and 10?  I've gotten different definitions of what
> level 10 is exactly.

Quantum's defintion of "level 10" (actually 1+0) is corect. I've never
seen any other definition, but I've seen some really poor explanations.

> Given the
> reliability of the SCSI drives, would there be a financial advantage in
> using this if the data was absolutely irreplaceable?

That's not necessarily why you use RAID. You can use it to decrease
your downtime (redundancy), and to up your performance (striping). If
you have a shop which uses 1,000 disks, and you're willing to spend
money to avoid downtime, it doesn't matter if the data is "absolutely
irreplaceable"...

-- g