Re: Raid 1 vs Raid 5 for tablespaces

The AIX LVM supports RAID-0 and RAID-1, but not together, as you state.

However, a rude form of RAID-0 can be achieved by specifying "max allocation policy", which will cause round-robin distribution of physical extents (PEs) across a list of physical volumes (PVs), thereby approximately RAID-0 at a large granularity (i.e. 4M, 8M, 16M per "stripe"). Still, it beats the heck out of RAID5...

on 8/12/03 12:24 PM, Schauss, Peter at peter.schauss_at_ngc.com wrote:

> Our hardware people tell me that our disk array will not support Raid 10.
> Given a choice between Raid 1 or 5 for my tablespaces, which one
> is best? This is Oracle 8.1.7 on AIX 4.3.3. The application will
> have a mix of read and write activity.
>
> Thanks,
> Peter Schauss

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