In my experience, multiple channels in an enterprise RAID card means separate paths for traffic. Especially for higher end cards.
Thus, the advantage of multiple cards in such a scenario will not be performance, but the ability tuip more quickly recover if a particular card dies. So, be sure your since card has multiple "channels" and you should be fine. -ASB: http://XeeSM.com/AndrewBaker Sent from my Motorola Droid On Nov 21, 2010 6:30 AM, "Oliver Marshall" <[email protected]> wrote: > Hi > > I'm trying to spec out a storage server here. We have a Lenovo RD220. In it is an LSI raid card with battery backup. As it has the battery we have enabled write caching. > > The OS will be put on a mirrored pair of sas 15k drives and then there will be a lump of sata based raid 5 storage. The LSI card has two ports, one will be used for the system drives, one for the sata storage. > > The question has arisen here whether we should separate the system drives and the sata drives and put them each on their own raid cards to increase throughput. This also increases the cost by at least £500 ($800) for an additional raid card and battery. > > My question is, in the real world, what kind of increase in throughput are we going to see? If it takes the entire thing to a new level of uber wonderment then it may be worth finding the cash for this project from somewhere else. However if it's margin then, for the additional cost and complexity, I think the cash can be used elsewhere. > > What your thoughts and experience ? > > Olly > > [cid:personal218be.jpg] > > [cid:g2supportsmall_250x58border6784.png] > > Network Support > Online Backups > Server Management > [http://www.g2support.com/googleapps.jpg] > Tel: 0845 307 3443 > Email: [email protected] > Web: http://www.g2support.com<http://www.g2support.com/> > Twitter: g2support<http://twitter.com/home?stat...@g2support> > Newsletter: http://www.g2support.com/newsletter > Mail: 2 Roundhill Road, Brighton, Sussex, BN2 3RF > > Have you said something nice about us to a friend or colleague ? > Let us say thanks. Find out more at www.g2support.com/referral< http://www.g2support.com/referral> > > G2 Support LLP is registered at Mill House, 103 Holmes Avenue, HOVE > BN3 7LE. Our registered company number is OC316341. > > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
