VIO server, mklv & jfs2

[jprabaker]

All,

When using the ios mklv command I can't see an option to set the type of logical volume. To create a jfs2 logical volume I have to go into oem_setup_env.

Can someone shed some light on the correct procedure for creating a jfs2 logical drive on ios?

Thanks,
John

 

[khalidaaa]

I don't remember havnig the option to choose between jfs or jfs2 when creating a virtual logical volume in vio server!

I will check and come back to you

regards,
Khalid

 

[khalidaaa]

yeah that's what it says in course manual i attened!

To create a logical volume:

mklv [ -lv NewLogicalVolume | -prefix Prefix ] VolumeGroup Size [PhysicalVolume ... ]

and before that ofcouse to create a vg:

mkvg [ -f ] [ -vg VolumeGroup ] PhysicalVolume ...

To do the mapping you can then use a whole physical volume or just the lv created above!

mkvdev -vdev TargetDevice -vadapter VirutalServerAdapter [ -dev DeviceName ]

for example:

mkvdev -vdev hdiskx -vadapter vhostx

or

mkvdev -vdev lvx -vadapter vhostx

regards,
Khalid

 

[jprabaker]

It's not an issue as I'm just using oem_setup_env, but that command is "supposed" to only be used for installing storage device drivers....

 

[p5wizard]

What do you need a jfs2 lv for on a VIOS for? You just need LVs (or complete disks for that matter) to act as backing devices for a VIO client target device.

The type of the LV on the VIOS is irrelevant.


HTH,

p5wizard

 

[jprabaker]

p5,

I've got 2 internal disks on each VIO server for client rootvgs. These are being split into 15G logical volumes. I suppose I don't need them to be jfs2, I just want them to be!

 

[p5wizard]

Yes, the LV type is irrelevant:

- create LV with command mklv in the VG containing the disks you have on the VIOSs (could even be spare diskspace in the VIOSs rootvg if you're short on diskspace)
- create target device with mkvdev with hte created LV as backing device.
- client LPAR then 'sees' a virtual SCSI disk with the size as the size of the LV on the VIOS, with the SCSI address as defined for the vtscsi device.


HTH,

p5wizard

 

[khalidaaa]

I hope these links will help:

http://www-128.ibm.com/developerworks/eserver/library/es-aix-vioserver-v2/

http://oss.gonicus.de/openpower/index.php/IBM_VIO_Server

http://www.redbooks.ibm.com/abstracts/sg247940.html?Open

Good Luck

Regards,
Khalid