[nSLUG] Tip: check your BBU on raid controllers

Dop Ganger nslug at fop.ns.ca
Sun Jan 27 11:34:24 AST 2013


On Fri, 25 Jan 2013, D G Teed wrote:

> Thought I'd share a server tip.  This is specific to Perc controllers
> and use of Open Manage, but there could be other brands which
> also disable write-back (for controller cache) in a similar way,
> as the BBU degrades.

And along similar lines, a tip I found the other day for anyone running 
software RAID... Force a background check to ensure the entire RAID is 
readable (before you find it during use) with "echo check > 
/sys/block/mdX/md/sync_action".

Cheers... Dop.


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