We recently did a cross-org migration to a new domain. We were using Exchange 2003 and have upgraded in this transition to Exchange 2007 running on one of our blades. After a day of migrating users and live usage the server unmounted the iSCSI based SAN that we are using. We rebooted the machine and the box would not make it past the "applying computer settings.." message on the boot up. We tried a cold boot to kick things back in but we would still get stuck on the boot. We booted into safe mode and made adjustments to a lot of Microsoft services by switching them to manual start instead of auto. Once we rebooted the box came up just fine so we thought we would start up all of the services that we had just messed with. Everything came up except for the Information Store service. We are unable to start this and thus we are dead in the water with our Exchange Server. We have been looking for any kind of fixes for this but have found nothing definitive. This is the last thing we need to work in our big migration. Any ideas?