we have several R900 servers with PERC 6/E card in it. Recently it we getting some message on /var/log/message say change to "write back" and change back to "write through".
We figure out it is PERC 6/E card battery weak. My questions are:
1. some battery only use one year (some even shorter) and already this problem.
2. How come PERC 5/E does not have this issue?
3. where is DISK array information store for PERC 6/E? I did NOT see NVRAM on PERC 6/E card.
4. when replace PERC 6/E card and power on server sometime it will ask you "import configuration" ans some time it won't. Why?
5. When replace PERC 6/E card and power on. Server ask "import configuration" should I answer "yes"?
6. where can I find documentation which mention "import configuration"?
Thanks.