Troubleshooting

Migrating Exchange 2010 To Dell Advanced Infrastructure Manager Environment
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Figure 15. Queue length – hub transport
Disk Latencies
This section describes the disk performance with Exchange installed and booted on local disks (Scenario
1) v/s Exchange booted from SAN (Scenario 2 and 3). The performance counters represent the latency
for Windows Server 2008 R2 with Exchange on local disk vs. Exchange on EqualLogic PS4000X single
array SAN as a RAID10 array. There seems to be a performance improvement in the disk latency when
moved in to the SAN. Figure 16 shows the values for corresponding counters. All these counters have
the limit of 20 ms.
Figure 16. Disk latencies
The counters above re-iterate the disk latencies that were observed for the database and log reads and
writes. They are within acceptable thresholds.