No parity calculations. HUGE difference. ------------------------------------------------------ Roger D. Seielstad - MCSE Sr. Systems Administrator Inovis - Formerly Harbinger and Extricity Atlanta, GA
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:Shawn.Hayes@;compass.net] > Sent: Monday, October 21, 2002 4:27 PM > To: [EMAIL PROTECTED] > Subject: RE: [ActiveDir] RAID Configuration on DC's Part 3 > > > Please explain how you will gain any performance increases > when all three of your arrays exist on the same SCSI channel. > Seems to me you have a single pipe leading to and from > multiple arrays. It is not hard to figure where the bottle > neck will be. > > -----Original Message----- > From: Devan Pala [mailto:dpala@;hotmail.com] > Sent: Monday, October 21, 2002 4:15 PM > To: [EMAIL PROTECTED] > Subject: [ActiveDir] RAID Configuration on DC's Part 3 > > > Hi, > > Thanks for all your replies earlier. > > Yes, it is true that the server only has 6 drive bays. The > array controller > has 2 internal and 2 external ports but I can only use one > internally since > the 6 drive bays only terminate to one SCSI port. (in this particular > server). Reason for buying the high-end controller is due to > standards and a > proven track record in production. > > Reason for not upgrading the chassis is primarily cost > especially in the > branch offices, the root and hub-site controllers are and > will be configured > entirely different, dual array controllers, quad-xeon > processors etc. The > whole nine yards. > > The database has been sized and definitely over-engineered > for the approx. > 2500 users spread over 15 sites in the Americas and Europe. > > I do understand that read performance for the database will > be greater under > a Raid 5 (stripe set with parity) config. but that means > combining the Logs > as well. Therefore, in order to gain both performance and > recovery benefits > from segregating the OS, Logs and Database to their own > spindle sets makes > sense over a simple Raid 1 and Raid 5 config. (just as my > mate Linton put > it). So I'm going with three Raid 1 arrays. > > Cheers, > > _________________________________________________________________ > Broadband?�Dial-up? Get reliable MSN Internet Access. > http://resourcecenter.msn.com/access/plans/default.asp > > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%> 40mail.activedir.org/ > > List info : > http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: > http://www.mail-archive.com/activedir%> 40mail.activedir.org/ > List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
