>From Steve wild Agree with the mirrored OS drive outside the RAID for recoverability & removes the system from exchange.
Trouble with the single RAID 5 is that all the stores & logs write to what is in effect a single drive. Thus a busy system using both Private & Public Information Stores will be sluggish - AND THAT'S WHAT I HAVE INHERITED! My ideal would be (in addition to the mirrored OS drives) 4 more drives, mirrored as two pairs, one for Private Information Store the other for Public. Also, Create a spare partition on the OS mirrored drive(s), formatted as FAT and write the log files to it. It'll fly Steve -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mellott, Bill Sent: 26 April 2002 14:37 To: Exchange Discussions Subject: RE: Need advice about an exchange HD setup I second this Had the same problem with a HP server 3 - 18GB in raid 5 one went down..dead gone... In Critical mode..then the second went. dead I got really lucky, in that on the mylex raid card this thing had.. I could try and force the second back online... It worked but taught me to always have an online spare. Me if I only had five bay's for this and only five. Im no exch guru like all these guy's... But Id go for the whole thing on the raid 5 with an online spare. Heck I'd even put a tape drive directly in the box. Actually thats what I do 4 drive bay's (CPQ ML350). 18GB 10K drives, 3 raid, 1 online spare. DLT tape drive in the box just for the exch. ~120 mailbox's 768MB ram it just seems to sit there and run 2 cent's bill -----Original Message----- From: Brett Wesoloski [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 25, 2002 5:06 PM To: Exchange Discussions Subject: RE: Need advice about an exchange HD setup The only problem I see with using three drives is boy does it suck when one goes down and your trying to get another one hoping one of the other two do not go down. Trust me it sucks. I had one go down and before I could get another one one of the other two went down. Now I will never have just three. -----Original Message----- From: Robert Williams [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 25, 2002 4:02 PM To: Exchange Discussions Subject: RE: Need advice about an exchange HD setup I forgot to mention that I have about 250 mailboxes and my store is about 10 gigs...so I don't see a issue with using 3 18 gigs raid5 for the store.... Thank You, Robert Williams Senior Network Administrator Raypak, Inc. [EMAIL PROTECTED] Phone - 805-278-5363 -----Original Message----- From: Robert Williams [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 25, 2002 1:53 PM To: Exchange Discussions Subject: RE: Need advice about an exchange HD setup Bill, this box only holds 5 drives....I have to work with what I got.... I will check the faq.... Thank You, Robert Williams Senior Network Administrator Raypak, Inc. [EMAIL PROTECTED] Phone - 805-278-5363 -----Original Message----- From: Mellott, Bill [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 25, 2002 1:50 PM To: Exchange Discussions Subject: RE: Need advice about an exchange HD setup Me... I'd add a 4th HD to the raid 5 for Online Spare. there's also a bit in the FAQ about optimum HD config for exch55. I think it mentions a mirrored pair also just for the log's. bill -----Original Message----- From: Robert Williams [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 25, 2002 4:31 PM To: Exchange Discussions Subject: Need advice about an exchange HD setup I am moving my 5.5 server to a new box soon. It is a Dell 2550 with 1.2 gigs ram and 5 18gig 10k SCSI drives with 128Meg Raid I am planning to use the first 2 drives mirrored for the OS and the other 3 for a raid 5 stripe for exchange.... If this is or is not a good setup, then any advice would be appreciated. Thank You, Robert Williams Senior Network Administrator Raypak, Inc. 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