Stephen. You are of course fully entitled to your opinion and the expression thereof. I merely expressed my humble opinion that you can't "really" RAID an IDE set. The emphasis was on the word really and you are entirely right to offer the questioner IDE RAID solutions, and the suggestion that an experienced SBS professional be engaged. Of course, one asks a question like this and there will always be innumerable answers. I would never design, offer, agree to support or countenance Exchange on IDE base RAID sets, howsoever controlled. It's a personal opinion, and I know of no-one in my peer group in the UK who would ever do so, as with another correspondent, I/we would be "very uncomfortable with it" (their quotes). Again it's purely an opinion, to be taken at face value and nothing else. As for your request for the backing up of facts surrounding the configuration, which transcends any hardware: RAID 1 for the OS I think is a given? Why have RAID for the databases if the OS has no resiliency RAID 1 for the Logs. The point here is not necessarily to split them from the RAID 1 OS, but to ensure a split from the RAID5. If you loose two drives on the stores (RAID 5) you can restore from the previous nights backup and roll the logs forward with zero loss of data. Co hosting the logs on the same RAID set as the stores leaves you vulnerable to a data loss not exceeding 23 hours 59 minutes. Which part of "3 or more drives in RAID5 for the exchange stores" need backing up with facts? Thank you for your comments and the opportunity for me to clarify my ill advised use of the word "really". -----Original Message----- From: Stephen Hartley [mailto:shartley@xxxxxxxxxxxxxxxxx] Sent: 15 November 2002 21:18 To: [ExchangeList] Subject: [exchangelist] RE: RAID in Exchange http://www.MSExchange.org/ RUBBISH -----Original Message----- From: Mark Arnold [mailto:mark@xxxxxxxx] Sent: Friday, November 15, 2002 9:29 PM To: [ExchangeList] Subject: [exchangelist] RE: RAID in Exchange http://www.MSExchange.org/ You can't really RAID an IDE set.[Stephen Hartley responds] Rubbish! You need a SCSI subsystem which is where the "every hard disk uses its own controller" sentence comes in.[Stephen Hartley responds] Rubbish The optimal for Exchange is hardware raid with the following configuration:[Stephen Hartley responds] In your opinion - back it up with some facts! 2 drives in RAID1 for the operating system. 2 drives in RAID1 for the Exchange logs. 3 or more drives in RAID5 for the exchange stores. The RAID1 number of drives can be reduced from two individual RAID1 sets to a pair of drives in RAID1 with two partitions. If you have to use IDE then you might do it this way: Controller 0 Primary - Operating System Controller 0 Slave - Exchange Install and Logs Controller 1 Primary - Mirrored stores Controller 1 Slave - Mirrored stores There are several options, all of which give varying degrees of resilience/performance mixes. -----Original Message----- From: Boed Yun [mailto:boedy@xxxxxxxxxxxxxx] Sent: 15 November 2002 10:32 To: [ExchangeList] Subject: [exchangelist] RAID in Exchange I am a new in IT World and have a stupid question , I've ever post this message but never get an answer. I want to build Exchange Server. and I plan to use several HD (I use all IDE both primary and secondary) , they say I could improve performance by using RAID0 or RAID5 because every harddisk use its own controller. Can I use that ? or anyone have an idea ? and sometimes I confuse about harddisk contoller. a friend told me that it's on the harddisk ( PCB attached to Harddisk) but someone else told me that it's on the motherboard or separate card. I don't know which one is correct . ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: exchlist@xxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: Mark@xxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')