I've got a HP ML350 G5 server running 6 disks as two RAID-5 configurations. This server has been notifying me of an empty battery on the E200i card. This seems to result in disabled cache: read and write speeds are very slow (around 20MB/s).
A possibility would be to replace the battery on the RAID card, but I don't really want to spend the money for the risk of losing data on power failure.
I found that it was possible to enable cache on the hard disks themselves, however, I can't find how this would be done on my server.
Another possibility would be to enable caching on the RAID card somehow, without replacing the battery.
Does anyone know how any of the above things are done?
Thanks in advance!