The one perfmon counter you need to watch is disk queue length. I think you'll find on partitioned RAID5's that the queue length averages quite a bit higher than on a non-partitioned array. IIRC, the goal is to have queue length under 2.
-------------------------------------------------------------- Roger D. Seielstad - MTS MCSE MS-MVP Sr. Systems Administrator Inovis Inc. > -----Original Message----- > From: Reasoner, Bob (PHES) [mailto:[EMAIL PROTECTED] > Sent: Friday, February 20, 2004 10:38 AM > To: Exchange Discussions > Subject: RE: Preparing for performance > > > That was my gut reaction. I've actually got one working now > with 4 drives > as RAID5 (with one hot spare) and have watched perfmon and not noticed > terrible performance (a few peaks at certain times). > > Thanks for the response! > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of Roger > Seielstad > Sent: Friday, February 20, 2004 7:06 AM > To: Exchange Discussions > Subject: RE: Preparing for performance > > I've done this a dozen times with 2650's and Compaq DL380s > (generally the > same form factor). > > RAID1 mirror, partitioned. 1 Partition gets the OS, a > pagefile, and all > installed apps (Exchange et al). Second partiton is dedicated > to log files. > > RAID5 for the remaining 3 drives, with an equal size pagefile > to above, and > all data - including the MTADATA working directory. > > It will work fine, and with that box, I doubt you're gonna > have big enough > stores to have enough loading for you to see drive related > bottlenecks. > > -------------------------------------------------------------- > Roger D. Seielstad - MTS MCSE MS-MVP > Sr. Systems Administrator > Inovis Inc. > > > > -----Original Message----- > > From: Reasoner, Bob (PHES) [mailto:[EMAIL PROTECTED] > > Sent: Thursday, February 19, 2004 7:25 PM > > To: Exchange Discussions > > Subject: Preparing for performance > > > > > > I have a Dell 2650 dual Xeon box that I will be building > our Exchange > > Server on. I know it is best to put the logs on their own > drive, but > > that makes it a little difficult to configure on this particular > > server (no choice). > > > > It has a Perc 3DI RAID controller and 5 Internal (36 GB) drives. I > > was thinking to carve it up as two drives for the OS/Logs, > RAID0 or 1, > > and 3 drives for the stores RAID5. I may be able to have a single > > drive for the OS and a single drive for the logs, and the > three drives > > for the stores, but haven't tried to make a single drive with this > > RAID controller before. I know some other RAID controllers I've > > worked with in the past allowed you to create a single > drive RAID1 or > > some strange setup to dedicate a single physical drive. > > > > The maximum number of mailboxes I would ever support is 500 > (counting > > resource boxes). This will be Exchange Enterprise so that > I can have > > more than 1 store (had problems in the past with the single > store 16GB > > limit of standard). > > > > Any thoughts from the pros on the list who do this more often? > > > > > > Bob Reasoner > > Harris County Public Health & Environmental Services > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Web Interface: > > http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&t > ext_mode=&lang=english > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > To unsubscribe via postal mail, please contact us at: > Jupitermedia Corp. > Attn: Discussion List Management > 475 Park Avenue South > New York, NY 10016 > > Please include the email address which you have been contacted with. > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Web Interface: > http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&t ext_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. 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