HP XP P9500 Storage - Manual (Page 16)

1. Command device. RAID Manager uses the SCSI Path-through driver for accessing the command
device. Therefore, the command device must be mapped as RAW device of Physical Mapping
Mode. At least one command device must be assigned for each VIO Client. The RAID Manager
instance numbers among different VIO Clients must be different, even if the command is
assigned for each VIO Client, because the command device cannot distinguish between VIO
Clients due to use of the same WWN via vscsi.
2. LUN sharing between VIO Server and VIO Clients. It is not possible to share a command device
between VIO Server and VIO Clients, and a normal Lun also cannot be shared between VIO
Server and VIO Clients.
3. Volume discovery via vscsi on VIO Client. The inqraid command discovers the volume
information by using SCSI inquiry, but VIO Client cannot report the real SCSI inquiry (Page0
and Page83) as shown below.
Example for inqraid command:
lsdev -Cc disk | /HORCM/usr/bin/inqraid
hdisk0 -> NOT supported INQ. [AIX ] [VDASD ]
hdisk1 -> NOT supported INQ. [AIX ] [VDASD ]
hdisk2 -> NOT supported INQ. [AIX ] [VDASD ]
:
:
hdisk19 -> NOT supported INQ. [AIX ] [VDASD ]
The following commands discover the volumes by issuing SCSI inquiry. These commands
cannot be used, because there is no port/LDEV for RAID information.
raidscan -pd <device>, raidar -pd <device>, raidvchkscan -pd <device>
raidscan -find [conf] , mkconf.sh, inqraid
pairxxx -d[g] <device>, raidvchkdsp -d[g] <device>, raidvchkset -d[g] <device>
\\.\CMD-Serial#-LDEV#-Port#:/dev/rhdisk on horcm.conf
Therefore, you need to know the volume mapping information (/dev/rhdisk) on the VIO Client
by referring to the physical volume mapping through the VIO Server.
4. About running on VIO Server. The volume mapping ( /dev/rhdisk) on a VIO Server is a
physical connection without converting SCSI Inquiry, so RAID Manager will perform as if
running on AIX 5.3. However, IBM does not allow running applications in the VIO server.
Since commands or scripts would have to be run outside the restricted shell, it may be necessary
to get IBM approval to run in the VIO server. So you would have to change your scripts to
run on a VIO server to issue the oem_setup_env command to access the nonrestricted shell.
Restrictions on Windows 2008 Hyper-V
Whether RAID Manager can perform or not depends on the support of the guest OS by Windows
Hyper-V, and then the guest OS depends on how Hyper-V supports front-end SCSI interfaces.
16 Installation requirements