Unable to start Information Store Service.

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?
dbachechiAsked:
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Matthew MillersCommented:
Can you see the iscsi LUNS? I assume these are where the stores are loated?
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kieran_bCommented:
Anything in the logs to indicate why the store isn't starting?
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dbachechiAuthor Commented:
Yes I can, I can browse all of the iscsi targets. I am not able to hook up to any though. After restart, every other Exchange service works fine except Information Store. When starting this manually, it reports:
Error 1053: The service did not respond to the start or control request in a timely fashion.
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Matthew MillersCommented:
What do you mean by "I am not able to hook up to any though"?

Can you see the EDB files?
Do you get any other events in the application log?
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dbachechiAuthor Commented:
yes I can see the EDB files but I am not able to connect. I get a lot of ESE errors in the application log.
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kieran_bCommented:
>>I get a lot of ESE errors in the application log.

Such as...
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dbachechiAuthor Commented:
I get read errors and write errors of -1022. I get "Error Disk IO error starting Storage Group". Every error seems to be read or write related.
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Matthew MillersCommented:
What verison of the initiator are you running?
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dbachechiAuthor Commented:
I am using the latest iSCSI initiator 2.06 I believe.
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Matthew MillersCommented:
Definently a storage issue.
Are you running other initiators accessing iscsi LUNs on the storage array?
What storage system are you running.

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dbachechiAuthor Commented:
Equal Logic PS300E 3.5 TB. We have stopped any other initiators.
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Matthew MillersCommented:
To be honest it could be anything.

Mismatched speed/duplex
Dodgy NIC
Dodgy cable
Dodgy switch
You see my point....

I would try and eliminate as many of these transient issues as possible.
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dbachechiAuthor Commented:
One interesting this is that our Exchange Server is connecting to the SAN multiple times. There are between 5 and 7 concurrent connections to the SAN. Why I don't know.
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