I've been sent in to clean up a couple installations where they put SBS on a VM, including the data store volumes. In both of these cases, ended up with 474 errors in ESE... which according to MS is generally caused by a hardware (disk subsystem) problem. There being no physical disk subsystem that the VM sees, I'm thinking it's a problem with I/O delay that causes store database corruption. So, don't do that. Use external storage of some sort. (iSCSI has been very good to me). Sorry if this seems like a simple no-brainer, but I know someone out there is doing it wrong, at least twice that I've seen and had to fix.
> From: [EMAIL PROTECTED]> To: ntsysadmin@lyris.sunbelt-software.com> Date: > Mon, 14 Jul 2008 21:26:22 +1000> Subject: RE: Excahnge Setup> > SCR generally > gives you a bit more flexibility than CCR. See: > http://msexchangeteam.com/archive/2007/06/28/445538.aspx> for a list of > differences> > You can certainly run Exchange in a VM. Just be aware that > virtualisation always adds overhead of some level, so if you are currently > I/O constrained (i.e. I/O is bottlenecking your systems) then virtualising > will just make the situation worse.> > Now, the higher end virtualisation > products all allow direct disk access (i.e. you can add a LUN as a disk to > the VM), and the overhead is reasonably low (around 10%). If you can provide > enough spindles and LUNs, then you can get Exchange working in VMs with > respect to the performance issues.> > Cheers> Ken> > -----Original > Message-----> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]> Sent: > Saturday, 12 July 2008 2:43 AM> To: NT System Admin Issues> Subject: Excahnge > Setup> > Can any of you Exchange guys comment on your preference for using > Stanby> Continuous Replication or Cluster continuous replication? Also, > running> Exchange as VM's. some prefer not to run Exchange as VM's because of > the> I/O contention problems. That is why we are running Notes on physical > boxes.> > Mike> > ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! > ~> ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~
