Product data

Chapter 2. Core procedures 17
2.2.4 The chkdev command
As of Virtual I/O Server Fix Pack 22, a new command has been introduced to
assist with the identification of disks and their capabilities. The Virtual I/O Server
chkdev command is capable of displaying the same values as mentioned
previously (IEEE, UDID, and PVID), but provides some additional information:
$ chkdev -dev hdisk6 -verbose
NAME: hdisk6
IDENTIFIER: 3E213600A0B8000291B0800009D760401BBB80F1815 FAStT03IBMfcp
PHYS2VIRT_CAPABLE: YES
VIRT2NPIV_CAPABLE: NA
VIRT2PHYS_CAPABLE: NA
PVID: 000fe4017e0037d70000000000000000
UDID: 3E213600A0B8000291B0800009D760401BBB80F1815 FAStT03IBMfcp
IEEE:
VTD:
$
In the command output you can see the PVID and UDID of the volume that the
Virtual I/O Server will identify as the IDENTIFIER field. In addition, there are
three capability fields:
PHYS2VIRT_CAPABLE This disk may be virtualized to a logical partition.
Once this is performed, this field will change to a
value of NA if the mapping is successful. A value
of NO indicates that this volume may not be
virtualized.
VIRT2NPIV_CAPABLE If the disk is capable of moving from a virtual SCSI
environment to an N_Port ID Virtualization (NPIV)
environment, this field will be set to YES.
Otherwise, it will be set to NO. A value of NA
means that this disk has already been moved and
the Virtual Target Device (or VTD as it is
abbreviated in the command output) will indicate
the mapping.
VIRT2PHYS_CAPABLE If the device is capable of moving from a virtual
environment to a physical environment and is
currently mapped to a VTD then the value here will
be YES. A value of NA means the disk is not in
use by a VTD, while a value of NO means the disk
is not capable of such a move.
For further information refer to the Virtual I/O Server chkdev manual page.