Re: Veritas's implementation/interpretation of RAID 0+1 and RAID 10

In comp.unix.solaris Chuck Swiger <chuck_at_codefab.com> wrote:
> Also note that what you said here:

>> Right. Although the setup makes it appear to be 0+1, it's really doing >> 1+0 under the covers.

> ...suggests that DiskSuite is smart enough to understand and perhaps even
> load-balance data available on multiple drives, which would explain why the
> same reads and writes happen to all of the disks, regardless of 0+1 vs. 1+0.

I would exect no difference in read/write behavior (in a non-failure case) between 0+1 and 1+0. Obviously the two behave *very* differently when failure is detected.

I don't know if SDS/LVM is doing real load balancing or just round-robin reads. I've assumed the latter, but would happily accept it if it's smarter than than.

-- 
Darren Dunham                                           ddunham_at_taos.com
Unix System Administrator                    Taos - The SysAdmin Company
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