[Melih]

how can i add a virtual disk (hdik0) using websm (hmc) to my lpar??

because, when i want to install AIX, i get the msg:

There are no disks available on this system..

[mshulman1980]

Please provide more information. Do you have VIO server running? If so, how many instances of it are there (usually 1 or 2). What kind of hardware are you running this on (P570, 595, 690, etc)

[Melih]

First of all, thank u for your help

i am running a p520

yes a vio server is alreade configure and supplied the other lpars with ressources...

what u mean with instances ? how can i find the info?

[m_seger]

Well I guess if you are talking about virtual disk, you must have one VIO or
probably two VIO Servers

Well first of all check if you are using the newest level of VIO OS
on VIO:
$ ioslevel
1.3.0.1-FP-8.1
Check this level with IBM VIO Site:
IBM - VIOS download support

After that you have to create the virtual Adapters. For each disk you will
need a Server SCSI Adapter on the VIO and a Client SCSI Adapter on the
LPAR. Be sure to use cfgdev/cfgmgr so the Adapter will be available (they
also need to be dynamically added, if you have a running system), or
if you are not sure reboot the involved VIO and LPARs. After that you will
see a vhostx on the VIO Server and the LPAR (if the LPAR is already installed)

Now it is time to connect physical disk to our virtual Adapters.
This depends if you are using SAN attached Disk or local Disk.

Local Disk:
If there is local disk used, the disk has to be assigned to the VIO Servers

If you have an additional Disk, which you want to use for your LPARs
you have to create a VG.
on VIO:
mkvg –f –vg VG_NAME hdiskXX
VG_NAME could be "rootvg_clients"

Afterwards or if you are using the the same disk as for
the VIO OS you need to create an LV
on VIO:
mklv ( –mirror ) –lv LV_NAME VG_NAME 50G
LV_NAME could be "lv_rootvg_testlpar1"

No you can check your virtual SCSI Adapters on the VIO to find out which
one you want to use
on VIO:
lsdev –virtual
lsdev -slots

If you know which disk/LV you want to attach to which LPAR (vhost) use
following command
on VIO:
mkvdev –vdev LV_NAME/DISK –vadapter vhostX –dev HD_NAME
HD_NAME could be hdisk0_testlpar1

Now you can check if stuff is assigned correctly
lsdev –virtual
lsmap –vadapter vhostX

Now you should see the the disk on the LPAR (boot or cfgmgr)

with SAN Disks:
If you are using SAN Disk you have to install SDDPCM Drivers on your VIO

But first of all you need to check which Drivers are supported:
IBM - Support Matrix for Subsystem Device Driver, Subsystem Device Driver Path Control Module, and Subsystem Device Driver Device Specific Module

Drivers are found here:

IBM - Subsystem Device Driver Path Control Module (SDDPCM)

IBM - Host Attachment for SDDPCM on AIX

We are using a VICOM Storage Controllers which are emulating ESS Disk
so I installed following Drivers on my p5 VIOs:

SDDPCM 2.1.0.0 for AIX 5.3 ML
SDDPCM 2.1.2.0 for AIX 5.3 ML

Host Attachment for SDDPCM on AIX
devices.fcp.disk.ibm.mpio.rte

to install them you have to change to root
on VIO:
oem_setup_env

Now your Storage Guy can configure disk to the p5, these disks
should show up in the VIO Server after a cfgdev command is issued.
to see all the paths to your disks
on VIO:
lspath


No you can check your virtual SCSI Adapters on the VIO to find out which
one you want to use (they have to be assigned as in described in the local
disk part)
on VIO:
lsdev –virtual
lsdev -slots

If you know which disk/LV you want to attach to which LPAR (vhost) use
following command
on VIO:
mkvdev –vdev hdiskXX –vadapter vhostX –dev HD_NAME
HD_NAME could be hdisk0_testlpar1

Now you can check if stuff is assigned correctly
lsdev –virtual
lsmap –vadapter vhostX

Now you should see the the disk on the LPAR (boot or cfgmgr)


Note:
From the Performance point of view it would be better to assign only whole
disks to LPARs instead of Logical Volumes

[m_seger]

I forgot if you are using local disk and have two VIO instances you create
on each VIO a Disk, these disks you have to mirror on the LPAR.

By the way check out these Documents:
IBM Redbooks | Partitioning Implementations for IBM eServer p5 Servers

IBM Redbooks | Advanced POWER Virtualization on IBM System p5

IBM Redbooks | IBM System p Advanced POWER Virtualization Best Practices

[Melih]

thx u very much..

i am trying now... i hope i can do this...

[Melih]

thank u very much m_seger...

it was very helpfull..