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way to replace DELL PERC 6/E card???

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.

Comments

Re: way to replace DELL PERC 6/E card???

By Dominik Zyla at 01/05/2011 - 11:19

On Wed, Jan 05, 2011 at 10:47:09PM +0800, mcclnx mcc wrote:
Yes, it'll import your raid configuration without data coruption. It
would also work with disks taken from older version of Perc.

Re: way to replace DELL PERC 6/E card???

By Brian Mathis at 01/05/2011 - 10:57

On Wed, Jan 5, 2011 at 9:47 AM, mcclnx mcc < ... at yahoo dot com.tw> wrote:

Please install and learn about the Dell Open Manage Monitoring tools,
and also read user guide for PERC/6 on Dell's web site. You seem to
be flying blind here and just guessing at what's going on. They have
a yum repository where you can "yum install" the software.

Most likely the card performed a "battery relearn" cycle where it
discharges and recharges the battery. During this process the battery
level drops and this causes the cache memory to become disabled.

It also sounds like you already got some new cards, which may have
been a waste of money. Install Dell OMSA, review the OpenManage
status and logs, and probably send back the new cards you already
bought (maybe your Dell sales rep will be upset that you learned how
to do this instead of just buy new stuff from him).

Re: way to replace DELL PERC 6/E card???

By mcclnx mcc at 01/05/2011 - 12:43

Thank you for your answer. Before you say something please be careful. I am NOT "blind". We have more than 100 DELL servers on different classes and use different tools to monitor system (include OPMN).

We have been doing lots of research on this issue and also discuss With DELL support at least three times but NOT get good answer.

This PERC 6/E is NOT on "battery lean cycle" and we understand what will happen on "battary lean cycle".

--- 11/1/5 (三),Brian Mathis <brian. ... at gmail dot com> 寫道:

Re: way to replace DELL PERC 6/E card???

By Brian Mathis at 01/05/2011 - 16:23

OK, good point and I apologize for seeming rough, though the phrase
"flying blind" is not an really an insult. Your post sounded a bit
like someone who hasn't dealt with servers much. The typical answers
for something like this are "read the manuals", and "call support to
get a replacement if you have bad hardware".

As you have over 100 Dell servers there's a high likelihood that you
got a few bad ones, so I would just replace it and move on. There's
really not much else to do.

On Wed, Jan 5, 2011 at 11:43 AM, mcclnx mcc < ... at yahoo dot com.tw> wrote:

Re: way to replace DELL PERC 6/E card???

By m.roth at 01/05/2011 - 11:16

Brian Mathis wrote:
Or go to the LSI website, and d/l MSM, and install that ("MegaRAID"),
which gives you a nicer GUI than the one you get when you boot the system,
and hit <ctrl-somethingorother>
<snip>
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