I wonder: Is it normal that it takes double the time to copy a file from
scsi disks to ssa disks with sw RAID-1, compared to copying to
non-mirrored ssa disks??
That is my experience, after some tests. I've tried to change attributes
for the lv, I've also tried to enable Fast-Write for Multiple Devices
under smit ssad for some of the ssa disks, but no help.
The problem is that my oracle database is waiting for I/O to complete
writes, and I suspect the sw mirrored ssa disks is responsible for this.
BTW: If I turn the mirror off, Oracle does not complain at all!
I use raw device for the tablespace files, redo log files and control files.
I would be grateful for any response!