Page cache and pdflush: Theory of operation and tuning for write-heavy loads

For write-heavy option in system, some kernel option must be adjusted. Here are link to article about some kernel options that might help.

Please refer to : http://www.westnet.com/~gsmith/content/linux-pdflush.htm

perc H200 hardware raid utility in linux

I just bought server coming with hardware raid PERC H200 (Dell).

By the time of this blog, I understand that it use chipset from LSI here are out put from

#lspci --n

LSI Logic / Symbios Logic SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] [1000:0072] (rev 03)

Unfortunately, the monitoring software for this h/w raid is not open. You have to download sas2ircu bin code. The program will display raid status.

I've downloaded from this link :

http://www.natecarlson.com/2010/08/23/lsi-command-line-utility-for-sas2-non-raid-controllers/#comments

Please visit for usage:

http://hwraid.le-vert.net/wiki/LSIFusionMPTSAS2#a2.Linuxkerneldrivers