T2000 internal hardware raid/cache
New T2000, Solaris 11/06, with 4 internal disks 0-4.
Ships with default cache: read=enabled, write=disabled for all 4.
(shown with format -e)
Planning on:
hardware mirroring OS disk (0 -> 1)
hardware mirroring 2nd set (2 -> 3)
1) Is it wise/safe to turn on write cache for OS mirrored disks?
Concerned if write cache will interfere in any way with expected operation of Solaris on the root disk. Or, possibly the swap partition.
2) Is it wise/safe to turn on write cache for 2nd mirrored disks?
2nd mirrored set will be used strictly for Oracle logging. Assume (always dangerous) write cache will increase write-intensive logging effieciency with no 'ill' effects.
3) Both hardware mirroring and write cache are addressed seperately - but nothing exlains if they play nicely together. Is it safe to assume (again, dangerous) that the write cache doesn't interfere with the mirroring?
T2000 has dual power supply on smart UPS w/1hr + generator.
Appreciate help, recommendations and feedback!!
