Go to main content

Oracle® VM Server for SPARC 3.6 Administration Guide

Exit Print View

Updated: September 2019
 
 

Virtual Disk and SCSI

If a physical SCSI disk or LUN is exported as a full disk, the corresponding virtual disk supports the user SCSI command interface, uscsi and multihost disk control operations mhd. Other virtual disks, such as virtual disks having a file or a volume as a back end, do not support these interfaces.


Note - You cannot use mpgroups and SCSI reservation together.

As a consequence, applications or product features using SCSI commands (such as Solaris Volume Manager metaset or Oracle Solaris Cluster shared devices) can be used in guest domains only with virtual disks having a physical SCSI disk as a back end.


Note - SCSI operations are effectively executed by the service domain, which manages the physical SCSI disk or LUN used as a virtual disk back end. In particular, SCSI reservations are implemented by SCSI commands on the service domain. Therefore, applications running in the service domain and in guest domains should not issue SCSI commands to the same physical SCSI disks. Doing so can lead to an unexpected disk state.