AIX Storage Management

this write had no competition from other disk requests so the disk heads will

have minimal movement across the disk platter regions.

One final performance result of interest is that in our scenario, mirroring

always

degraded performance, even when it was tuned for optimal performance. This is

not surprising since every logical write request is translated into two physical

write operations. However, you may obtain different results in another

environment, particularly if your test is based on a read rather than a write

operation, which we did not investigate here.

8.4 Managing Backup and Restore

It is critically important that a systems administrator ...