VMware GSX Server 2.5.2

 Prev   Contents   Last   Next 

SCSI reservation support is limited by the following:

• You can enable SCSI reservation for SCSI virtual, raw and plain disks. No other type of SCSI devices can use SCSI reservation in a virtual machine. Specifically, you cannot enable SCSI reservation for a generic SCSI disk. SCSI reservation support for virtual disks is experimental.

  Note: VMware supports SCSI reservation when used with plain disks. Support for SCSI reservation with virtual and raw disks is considered experimental. For high-availability configurations, use SCSI reservation with plain disks.

• SCSI disks can be shared via reservation among virtual machines running on the same host. This means that the configuration files for the virtual machines must all be running on the same GSX Server host. However, the disk or disks the virtual machines are sharing can be located remotely on a different host.

• Even though the virtual or plain disk is a SCSI disk, it can be located on a host running on an IDE drive. A raw disk must always be a SCSI disk.

• GSX Server virtual machines currently support only the SCSI-2 disk protocol, but not applications using SCSI-3 disk reservations. However, all popular clustering software (including MSCS and VCS) currently use SCSI-2 reservations.