# Disk Timeouts on a Front-End Exchange Server 2003 in DMZ

I have two front end exchange 2003 servers, both are VMs, and both are on different physical Linux boxes running vmware server in my dmz.

A few days ago, all my Nagios alerts timed out for one of them, and the ping checks had a high error rate. On this front-end exchange vm, I saw the following which seems to indicate disk timeouts/problems during this time in the system section of the event viewer (the other sections don't go very far back becomes of spam notices, going to have to fix that):

Event Type: Error
Event Source:   vmscsi
Event Category: None
Event ID:   9
Date:   	12/12/2009
Time:   	9:25:19 AM
User:   	N/A
Computer:   FOO
Description:
The device, \Device\Scsi\vmscsi1, did not respond within the timeout period.


On the Linux host, I don't see anything in /var/log/messages or /var/log/vmware (or anything else really) that gives me any hints. In the sar log, I do see a higher IOWait ~22 at this time then I have seen anywhere else, normally it only spikes to around 11 when the backups run, which they were not during this time. Might this happen from a disk falling out of the array, anyone know how I check that on Poweredge 2950 ( using dset? ).

On the other front-end VM, I got the following (This, I don't really know what it means, master browser?):

Event Type: Error
Event Source:   MRxSmb
Event Category: None
Event ID:   8003
Date:   	12/12/2009
Time:   	9:33:16 AM
User:   	N/A
Computer:   FOO
Description:
The master browser has received a server announcement from the computer FOO02 that believes that it is the master browser for the domain on transport NetBT_Tcpip_{..... The master browser is stopping or an election is being forced.


So besides the above questions, I am really trying to figure out what happened since everything seems to have recovered on its own, any ideas?

Update:
Found this megacli utility which is new to me, but starting the day after this event I see a lot of:

Code: 0x00000071
Class: 0
Locale: 0x02
Event Description: Unexpected sense: PD 03(e1/s3), CDB: 28 00 0a 8c 60 5d 00 00 08 00, Sense: f0 00 03 0a 8c 60 5d 0a 00 00 00 00 11 00 00 00 00 0
Event Data:
===========
Device ID: 3
Enclosure Index: 1
Slot Number: 3


From /opt/MegaRAID/MegaCli/MegaCli -AdpEventLog -GetEvents -f events.log -aALL && cat events.log. This doesn't sound good, anyone know what this specifically means?

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On the Windows VM guest, what is the scsi driver version and modified date? What model hard drives? –  Greg Askew Dec 17 '09 at 1:01