When using 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 SAN fabric.
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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 SAN fabric.
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