Assigning a New Disk From VIO to Lpar in AIX

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Assigning a new disk from a VIO to LPAR

August 11, 2010

Wipro ConfidentialPage 1 of 9


Author Narasimha Raju Bitla

Version 1.0

Date of Creation 11/08/2010

Wipro Email [email protected]


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Change History:

Revision Date Author Comments

1.0 11/08/2010 Narasimha Raju

Bitla

Initial creation

1.1

1.2

1.3

1.4


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VIO Document for assigning disk from VIO server to LPAR .

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Q&A

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When we have to follow this procedure?

When assigning new disk to LPAR.

How to find it the LPAR server?

No direct method. But we can find by lsdev -Cc adapter | fsc.

It shows the fcs list is not LPAR.

How to find the HMC from the LPAR?

lsrsrc "IBM.ManagementServer" shows the IP address. nslookup the ip shows the hmc name.

If two LPAR "A" and LPAR "B" are cluster from different set of VIO servers, How can i requst the disk

from BSO?

Provide the VIOS WWN number of the LPAR "A" and LPAR "B" and make the note that PVID should be same,

as normal VIO disk requst. No need to mention the servers are cluster.

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Scan the new disk as per the normal disk scan

lspv > /tmp/lspv.old


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cfgmgr

lspv > /tmp/lspv.newdiff /tmp/lspv.old /tmp/lspv.new

Make a note of LUN number from the following command

powermt display dev=

Assign the pvid

chdev -l -a pv=yes

chdev -l hdiskpower14 -a pv=yes

Assign the PVID to the disk in another VIO server

chdev -l -a pv=yes

chdev -l hdiskpower14 -a pv=yes

Confirm the both the PVID are same

lspv | grep

lspv | grep -i hdiskpower14

Note:- Not to continue, if the PVID are differ.

Now we have to change some attrubute of the new disk

Chage the reserve lock to "No"


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chdev -l -a reserve_lock=no

chdev -l hdiskpower14 -a reserve_lock=no

Change the max_coalesce to 0x40000

chdev -l hdiskpower14 -a max_coalesce=0x40000

Find the vhost # for the LPAR

lsmap -all

Note:- Run this command form the padmin restricted shell

The above commend list all the vhost and the devices

Check for the your LPAR server name.

For example the output like this

--------------- -------------------------------------------- ------------------

vhost1 U9133.55A.066DBAH-V21-C11 0x00000001

VTD v1-dpr201-9b4

Status Available

LUN 0x8100000000000000

Backing device hdiskpower0

Physloc U787B.001.DNWG93R-P1-C2-T1-L1

VTD v1-dpr201-9ba

Status Available


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LUN 0x8200000000000000

Backing device hdiskpower3Physloc U787B.001.DNWG93R-P1-C2-T1-L4

VTD v1-dpr201-9c0

Status Available

LUN 0x8300000000000000

Backing device hdiskpower6

Physloc U787B.001.DNWG93R-P1-C2-T1-L7

Here the dpr201is the partical LPAR name and the 8c3 is the lun number. In the top we find the vhost number.

Note:- Run the following form the restricted shell

To assign the disk from VIO to LPAR

Here I am assigning disk from vioax109 /vioax110 to LPAR (dpravax201c)

mkvdev -vdev hdiskpower14 -vadapter vhost1 -dev v1-dpr201-8c3

mkvdev -vdev hdiskpower14 -vadapter vhost1 -dev v1-dpr201-8c3

Login to the LPAR (dpravax201c)

Check the current available disk

(root@dpravax201c)/> lspv

hdisk0 0006002dd75aa646 rootvg active

hdisk1 0006002dd75b8b46 appsvg active


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hdisk2 0006002dd753c8d5 web_vg active

hdisk3 0006002dd7593694 i2_vg activehdisk4 0006002dd7566e61 i2_vg active

To configure the new disk

cfgmgr

Check the availability of new disk

(root@dpravax201c)/> lspv

hdisk0 0006002dd75aa646 rootvg active

hdisk1 0006002dd75b8b46 appsvg active

hdisk2 0006002dd753c8d5 web_vg active

hdisk3 0006002dd7593694 i2_vg active

hdisk4 0006002dd7566e61 i2_vg active

hdisk5 0006002d0a278162 None

Note:-The new disk PVID should matches with the PVID in the VIO servers

lspv | grep hdisk5

hdisk5 0006002d0a278162 None

Change the disk attribute

Change the hcheck_interval=60

chdev -l hdisk5 -a hcheck_interval=60


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Set the path priority

chpath -l hdisk5 -p vscsi0 -a priority=2

Add the disk to VG

extendvg

extendvg i2_vg hdisk5

Extend the file system

chfs -a size=+

chfs -a size=+50G /apps/i2

NOTE:-

Some time you may got the error while try to increase the Filesystem

(root@dpravax201c)/> chfs -a size=+50G /apps/i2

0516-787 extendlv: Maximum allocation for logical volume i2_lv

is 512.

The error stating that the Max Logical volume allocation is 512. So we need to increase the max LV allocation

to 1024 with the following command. Then try increasing the Filesystem. It will work.

chlv -x 1024

chlv -x 1024 i2_lv

Then run chfs to increase the Filesystem


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chfs -a size=+50G /apps/i2

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Documents

Assigning a New Disk From VIO to Lpar in AIX