} -----Original Message----- } Robert wrote: } } >greetings } > } >pre centos install raid5 setup on a compaq dl380 } > } >is asking for stripe size. } > } >16kb } >32kb } >64kb } > } >i am using one of the built in controllers and the machine has just a gig } of } >ram and 4 18.2 gig 10,000 rpm drives } > } >machine will be an email server with simple web hosting as well. } > } >suggestions? } > } > } } Moving around large files (like a streaming media or file server) will } likely benefit from larger stripe sizes. For an email server, } increasing the size of the stripe over 16k probably isn't going to buy } you much, if any, performance benefit. The best way to tell is to } actually test with your typical data pattern and system load to see } which provides the best bang. I'd probably go with 16kb in your } situation unless you've got time to test and fiddle. } } Cheers, }

thank you, i kinda figured that was about right yet wanted to consult the wisdom on the list...

also, there is another place that allows one to change the sectors per track size for "maximum boot size".... choices are 32 sectors per track or 63 sectors per track on this compaq dl380 with 4 18.2 gig 10k scsi drives in array.

i get the idea in terms of a simple ide workstation yet i have not the practical experience with this specific machine with scsi and raid5 config.

suggestions please?

thanks!

- rh

On Wed, 9 Nov 2005, Robert wrote:

low, medium and high for when a drive is hort swap replaced or an array is expanded etc...

what does the wisdom on the list say here ???

the server will be low traffic for quite some time and so im guessing setting it to HIGH priority will not make a difference in day to day operations should a drive fail.

do most people set it to HIGH regardless of the machine or situational possibilites?

Setting it to HIGH will mean that drive rebuilds take precedence over OS based disk I/O. It will kill your performance while it rebuilds. If you can live with that, or if you are going to take it offline or do it at night, then fine. Otherwise, stick with low or medium.

------------------------------------------------------------------------ Jim Wildman, CISSP, RHCE jim@rossberry.com http://www.rossberry.com "Society in every state is a blessing, but Government, even in its best state, is a necessary evil; in its worst state, an intolerable one." Thomas Paine