Thursday, April 7, 2011

SAN for shared storage

When using fibre channel SAN for shared storage in ESX(i) environments, be sure to set the following advanced options:

Disk.UseLunReset=1 (1 is the default)
Disk.UseDeviceReset=0 (1 is the default)

The reason for disabling DeviceReset is because it can perform a complete SCSI bus reset, clearing all SCSI reservations, which can disrupt the fibre channel SAN fabric.
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