01-11-2012
Hi,
dio is for JFS filesystems only - I doubt you are using jfs anywhere of your box - if you do that is part of your problem
for the cio part, - I am with Z80A - if you are using oracle, than you should use SETALL as oracle setting since Oracle 9.
If you are copying files into a cio mounted device, than thre is no filesystem buffering, as cio is switching it off. So if you copy anything, than you are saturating your disks. You are much better off, if you are mounting your filesystems without cio but with noatime options
Regards
zxmaus
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