Gouranga's Tech Blog: creating volume groups and mount storage in IBM-AIX

This small document will helps you how to create volume groups (VG) after mapping host from storage.

Step-1 : Run "cfmgr" after mapping host in storage

e.g.,
# cfgmgr

Step-2 : List attached disks, use “lspv” ( physical volume)

# lspv

hdisk0 00f9d98b1cc32587 rootvg active

hdisk1 none None

hdisk2 none None

hdisk3 none None

Here, after disk name "none" is coming means, physical volume is not created. So you need to create pvs.

Step-3 : Verify the size of attached disks

# bootinfo -s hdisk1

102400

# bootinfo -s hdisk2

1048576

# bootinfo -s hdisk3

512000

Step-4: create volume group (vg)

a) Enable pv, It will create pvid :

# chdev -l hdisk1 -a pv=yes

hdisk1 changed

# chdev -l hdisk2 -a pv=yes

hdisk2 changed

# chdev -l hdisk3 -a pv=yes

hdisk3 changed

b) Now list all PVs, it will show all PVid.

bash-4.2# lspv

hdisk0 00f9d98b1cc32587 rootvg active

hdisk1 00f9d98bc23769cf None

hdisk2 00f9d98bc2381d77 None

hdisk3 00f9d98bc238343f None

bash-4.2#

c) Now create Volume group:

# smit mkvg à Add an Original Volume group à Enter Volume group name ( e.g., binvg) à Now select required / planned PV Name ( as seen below) à

à e.g., select “hdisk1”. See below screen shot

à Now run set info (press two times enter) à Exit ( Esc + 0)

Note: select "yes" if you want to create volume group forcefully.

Now confirm, whether PV created or not.

# lsvg

rootvg

binvg

# lspv

hdisk0 00f9d98b1cc32587 rootvg active

hdisk1 00f9d98bc23769cf binvg active

hdisk2 00f9d98bc2381d77 None

hdisk3 00f9d98bc238343f None

( Initially “None” when not assigned to any VG).

Step-5: create File system

# smitty crfs

Select “Add an Enhanced Journal File system” à select “ Add an Enhanced Journal File system” again ( to automatically create logical volume (LV) à select your VG ( eg, binvg) à

à select Unit ( as GB) . Use Esc+4 to list info à Enter Required size ( use max -2 GB aprx from actual VG size) à Enter Mount point Name à Select restartable option as “Yes” (see from below screen shot) – Press Enter to Apply

After hit “Enter” key

Step-6 : Now mount it

n Before mount

bash-4.2# df -g

Filesystem GB blocks Free %Used Iused %Iused Mounted on

/dev/hd4 10.00 9.81 2% 10880 1% /

/dev/hd2 5.00 2.08 59% 63366 12% /usr

/dev/hd9var 5.00 4.69 7% 6351 1% /var

/dev/hd3 20.00 10.85 46% 409 1% /tmp

/dev/hd1 5.00 5.00 1% 5 1% /home

/dev/hd11admin 0.50 0.50 1% 5 1% /admin

/proc - - - - - /proc

/dev/hd10opt 5.00 4.86 3% 7004 1% /opt

/dev/livedump 0.50 0.50 1% 4 1% /var/adm/ras/livedump

bash-4.2#

bash-4.2# mount /u01

bash-4.2#

After mount

bash-4.2# df -g

Filesystem GB blocks Free %Used Iused %Iused Mounted on

/dev/hd4 10.00 9.81 2% 10880 1% /

/dev/hd2 5.00 2.08 59% 63366 12% /usr

/dev/hd9var 5.00 4.69 7% 6351 1% /var

/dev/hd3 20.00 10.85 46% 409 1% /tmp

/dev/hd1 5.00 5.00 1% 5 1% /home

/dev/hd11admin 0.50 0.50 1% 5 1% /admin

/proc - - - - - /proc

/dev/hd10opt 5.00 4.86 3% 7004 1% /opt

/dev/livedump 0.50 0.50 1% 4 1% /var/adm/ras/livedump

/dev/fslv00 98.00 97.98 1% 4 1% /u01

bash-4.2#

In similar way I assigned all PVs ( Physical volumes):

# lspv

hdisk0 00f9d98b1cc32587 rootvg active

hdisk1 00f9d98bc23769cf binvg active

hdisk2 00f9d98bc2381d77 datavg active

hdisk3 00f9d98bc238343f bkpvg active

bash-4.2#

bash-4.2# lsvg

rootvg

binvg

datavg

bkpvg

# df –g

bash-4.2# df -g

Filesystem GB blocks Free %Used Iused %Iused Mounted on

/dev/hd4 10.00 9.81 2% 10895 1% /

/dev/hd2 5.00 2.08 59% 63366 12% /usr

/dev/hd9var 5.00 4.69 7% 6353 1% /var

/dev/hd3 20.00 10.85 46% 409 1% /tmp

/dev/hd1 5.00 5.00 1% 5 1% /home

/dev/hd11admin 0.50 0.50 1% 5 1% /admin

/proc - - - - - /proc

/dev/hd10opt 5.00 4.86 3% 7004 1% /opt

/dev/livedump 0.50 0.50 1% 4 1% /var/adm/ras/livedump

/dev/fslv00 98.00 97.98 1% 4 1% /u01

/dev/fslv01 990.00 989.85 1% 4 1% /u02

/dev/fslv02 445.00 444.93 1% 4 1% /u03

bash-4.2#

Add more disk to exting VG:

If you want to add more disks to existing volume group, then you need to extend volume group.

Extend VG ( add more disk to exting vg):

e.g.,

# smit extendvg

To remove exting file system:

If you want to remove one exiting file system, then you need to use "rmfs". So that you can create new vg and file system. But before that you need to clear the volume group.

#rmfs /u01

To Clear Volume Group ( vg):

e.g.,

# chdev -l hdisk4 -a pv=clear

To view what storage attached:

Use "lsdev" command to view storage attached with passing "disk" as a parameter.

bash-4.2$ lsdev -Cc disk

hdisk0 Available 01-00-00 SAS RAID 10 Disk Array

hdisk1 Available 04-00-01 MPIO FC 2145

hdisk2 Defined 04-00-01 MPIO FC 2145

hdisk3 Available 04-00-01 MPIO FC 2145

hdisk4 Available 04-00-01 IBM MPIO DS5020 Array Disk

hdisk5 Available 04-00-01 MPIO FC 2145

hdisk6 Available 04-00-01 MPIO FC 2145

hdisk7 Available 04-00-01 MPIO FC 2145

hdisk8 Available 04-00-01 MPIO FC 2145

hdisk9 Available 04-00-01 MPIO FC 2145

hdisk10 Available 04-00-01 IBM MPIO DS5020 Array Disk

hdisk11 Available 04-00-01 IBM MPIO DS5020 Array Disk

hdisk12 Available 04-00-01 IBM MPIO DS5020 Array Disk

hdisk13 Available 04-00-01 IBM MPIO DS5020 Array Disk

bash-4.2$

To view details about volume groups ( vg):

e.g.,

# lsvg -l datavg

datavg:

LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT

loglv02 jfs2log 1 1 1 open/syncd N/A

fslv03 jfs2 750 750 1 open/syncd /u02

To find WWN number to map host in Storage:
a) AIX
# lscfg -vl fcs*| grep "Network Address"
b) LINUX
# systool -c fc_host -v | grep port_name
c) Window Server
Open Solution Manager, Then run below command in solution manager console
c:\> Get-WmiObject -class MSFC_FCAdapterHBAAttributes -namespace “root\WMI” | ForEach-Object {(($_.NodeWWN) | ForEach-Object {“{0:x}” -f $_}) -join “:”}

Related Link:

Managing disk / storage in Linux

Have you changed your prompt!
-- Chnage prompt:
[ehdb6][/] => cd /tmp
[ehdb6][/tmp] => vi /etc/profile
[ehdb6][/tmp] => . profile
[ehdb6][/tmp] #

Scenario analysis:

-- During some maintenance activity, one of VG ( e.g., "binvg" deactivated.), I tried to tried to create with new vg name ( eg. binvg2) but while creating file system with mount option, it doesn't allow to proceed. Because already file system exits on that. I tried with "rmfs" to remove file system which was not worked. These are wrong attempts:

Now from this situation we will bring the existing "binvg".

-- After creating "binvg2"

bash-4.2# lspv
hdisk0 00047abed0a7c10c rootvg active
hdisk2 00047abe3407efc6 None
hdisk3 00047abe33d16121 None
hdisk4 00047abe19ec463c binvg2 active
hdisk1 00047a6ae1ee0669 rootvg active
hdisk5 00047abe19ec5b0c binvg2 active
hdisk6 none None
hdisk7 none None
hdisk8 none None
hdisk9 none None
hdisk10 none None
hdisk11 none None
bash-4.2#

bash-4.2#
bash-4.2# lsvg -l binvg2
binvg2:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT

-- Showing "binvg" exists

bash-4.2# lsvg
old_rootvg
rootvg
binvg2
binvg
#

-- Export VG info to memory

bash-4.2# exportvg binvg

-- Deactivate "binvg2"

bash-4.2# varyoffvg binvg2
bash-4.2# exportvg binvg2

-- View physical volumes

bash-4.2# lspv
hdisk0 00047abed0a7c10c rootvg active
hdisk2 00047abe3407efc6 None
hdisk3 00047abe33d16121 None
hdisk4 00047abe19ec463c None
hdisk1 00047a6ae1ee0669 rootvg active
hdisk5 00047abe19ec5b0c None
hdisk6 none None
hdisk7 none None
hdisk8 none None
hdisk9 none None
hdisk10 none None
hdisk11 none None

-- Now import VG info to specified disk

bash-4.2# importvg -y binvg hdisk4
synclvodm: No logical volumes in volume group binvg.
binvg

-- Verify

bash-4.2# lspv
hdisk0 00047abed0a7c10c rootvg active
hdisk2 00047abe3407efc6 None
hdisk3 00047abe33d16121 None
hdisk4 00047abe19ec463c binvg active
hdisk1 00047a6ae1ee0669 rootvg active
hdisk5 00047abe19ec5b0c binvg active
hdisk6 none None
hdisk7 none None
hdisk8 none None
hdisk9 none None
hdisk10 none None
hdisk11 none None
#

-- Verify the file system, check that specified mount point is avialable

bash-4.2# vi /etc/filesystems
"/etc/filesystems" 117 lines, 2198 characters
.....
.....
*

/:
dev = /dev/hd4
vfs = jfs2
log = /dev/hd8
mount = automatic
check = false
type = bootfs
vol = root
free = true

/home:
dev = /dev/hd1
"/etc/filesystems" 117 lines, 2198 characters
*
* US Government Users Restricted Rights - Use, duplication or
* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
*
*
*
* This version of /etc/filesystems assumes that only the root file system
* is created and ready. As new file systems are added, change the check,
* mount, free, log, vol and vfs entries for the appropriate stanza.
*

/:
dev = /dev/hd4
vfs = jfs2
log = /dev/hd8
mount = automatic
check = false
type = bootfs
vol = root
free = true

/home:
dev = /dev/hd1
vfs = jfs2
log = /dev/hd8
mount = true
check = true
vol = /home
free = false

/usr:
dev = /dev/hd2
vfs = jfs2
log = /dev/hd8
mount = automatic
check = false
type = bootfs
vol = /usr
free = false

/var:
dev = /dev/hd9var
vfs = jfs2
log = /dev/hd8
mount = automatic
check = false
type = bootfs
vol = /var
free = false

/tmp:
dev = /dev/hd3
vfs = jfs2
log = /dev/hd8
mount = automatic
check = false
vol = /tmp
free = false

/admin:
dev = /dev/hd11admin
vol = "/admin"
mount = true
check = false
free = false
vfs = jfs2
log = /dev/hd8

/proc:
dev = /proc
vol = "/proc"
mount = true
check = false
free = false
vfs = procfs

/opt:
dev = /dev/hd10opt
vfs = jfs2
log = /dev/hd8
mount = true
check = true
vol = /opt
free = false

/var/adm/ras/livedump:
dev = /dev/livedump
vfs = jfs2
log = /dev/hd8
mount = true
account = false

:q!

-- View physical volumes

bash-4.2# lspv
hdisk0 00047abed0a7c10c rootvg active
hdisk2 00047abe3407efc6 None
hdisk3 00047abe33d16121 None
hdisk4 00047abe19ec463c binvg active
hdisk1 00047a6ae1ee0669 rootvg active
hdisk5 00047abe19ec5b0c binvg active
hdisk6 none None
hdisk7 none None
hdisk8 none None
hdisk9 none None
hdisk10 none None
hdisk11 none None
#

-- Now re-create file system on the vg

bash-4.2# crfs -v jfs2 -g binvg -m /u01 -a size=98G -A yes
File system created successfully.
102757108 kilobytes total disk space.
New File System size is 205520896

-- Verify

bash-4.2# mount -a
mount: 0506-324 Cannot mount /dev/hd1 on /home: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/hd11admin on /admin: The requested resource is busy.
mount: 0506-324 Cannot mount /proc on /proc: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/hd10opt on /opt: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/livedump on /var/adm/ras/livedump: The requested resource is busy.
bash-4.2# df -gt
Filesystem GB blocks Used Free %Used Mounted on
/dev/hd4 5.00 0.18 4.82 4% /
/dev/hd2 5.00 2.79 2.21 56% /usr
/dev/hd9var 2.00 0.34 1.66 18% /var
/dev/hd3 7.00 0.01 6.99 1% /tmp
/dev/hd1 20.00 6.39 13.61 32% /home
/dev/hd11admin 0.12 0.00 0.12 1% /admin
/proc - - - - /proc
/dev/hd10opt 2.00 0.21 1.79 11% /opt
/dev/livedump 0.25 0.00 0.25 1% /var/adm/ras/livedump
/aha - - - - /aha
/dev/fslv00 98.00 0.02 97.98 1% /u01
bash-4.2#

-- successful.

NFS Mount:

-- Do a NFS mount

step-1: Export the directory in source system

bash-4.2# smitty nfs
--> Network file system NFS --> Add a Directory to Exports List --> give directory name

Add a Directory to Exports List

bash-4.2# smitty nfs
Add a Directory to Exports List

Type or select values in entry fields.
Press Enter AFTER making all desired changes.

[TOP] [Entry Fields]
* Pathname of directory to export [/u03] /
Anonymous UID [-2]
Public filesystem? no +
* Export directory now, system restart or both both +
Pathname of alternate exports file []
Allow access by NFS versions [] +
External name of directory (NFS V4 access only) []
Referral locations (NFS V4 access only) []
Replica locations []
Ensure primary hostname in replica list yes +
Allow delegation? []
Scatter none +
* Security method 1 [sys,krb5p,krb5i,krb5,dh] +
[MORE...24]

F1=Help F2=Refresh F3=Cancel F4=List

Step:2 : Go for mount

bash-4.2# smitty nfs

smitty nfs
--> Network file system NFS --> Configure NFS on This System --> Add a File System for Mounting

Add a File System for Mounting

[TOP] [Entry Fields]
* Pathname of mount point [/u03] /
* Pathname of remote directory [/u03]
* Host where remote directory resides [ehdb7]
Mount type name []
* Security method [sys] +
* Mount now, add entry to /etc/filesystems or both? both +
* /etc/filesystems entry will mount the directory yes +
on system restart.
* Mode for this NFS file system read-write +
* Attempt mount in foreground or background background +
Number of times to attempt mount [] #
Buffer size for read [] #
Buffer size for writes [] #
[MORE...26]

(Enter) save+exit

-- To remount again, User mount -a ( do if required )

e.g.,

bash-4.2# umount /u03
bash-4.2# df -gt
Filesystem GB blocks Used Free %Used Mounted on
/dev/hd4 5.00 0.19 4.81 4% /
/dev/hd2 5.00 2.81 2.19 57% /usr
/dev/hd9var 2.00 0.41 1.59 21% /var
/dev/hd3 7.00 0.02 6.98 1% /tmp
/dev/hd1 20.00 16.60 3.40 83% /home
/dev/hd11admin 0.12 0.00 0.12 1% /admin
/proc - - - - /proc
/dev/hd10opt 2.00 0.21 1.79 11% /opt
/dev/livedump 0.25 0.00 0.25 1% /var/adm/ras/livedump
/aha - - - - /aha
/dev/fslv00 98.00 26.90 71.10 28% /u01

bash-4.2# mount -a
mount: 0506-324 Cannot mount /dev/hd1 on /home: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/hd11admin on /admin: The requested resource is busy.
mount: 0506-324 Cannot mount /proc on /proc: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/hd10opt on /opt: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/livedump on /var/adm/ras/livedump: The requested resource is busy.
mount: 0506-324 Cannot mount /dev/fslv00 on /u01: The requested resource is busy.

Now check again,

bash-4.2# df -gt
Filesystem GB blocks Used Free %Used Mounted on
/dev/hd4 5.00 0.19 4.81 4% /
/dev/hd2 5.00 2.81 2.19 57% /usr
/dev/hd9var 2.00 0.41 1.59 21% /var
/dev/hd3 7.00 0.02 6.98 1% /tmp
/dev/hd1 20.00 16.60 3.40 83% /home
/dev/hd11admin 0.12 0.00 0.12 1% /admin
/proc - - - - /proc
/dev/hd10opt 2.00 0.21 1.79 11% /opt
/dev/livedump 0.25 0.00 0.25 1% /var/adm/ras/livedump
/aha - - - - /aha
/dev/fslv00 98.00 26.90 71.10 28% /u01
ehdb7:/u03 1300.00 829.61 470.39 64% /u03
bash-4.2#

Hope, You learn something.

Note: Assume IP address of host "ehdb7" is 192.168.1.1

Create LV on VG and mount, do a NFS mount to other server

1) unmount ( if mounted)

bash-4.2# unmount /test

2) view lv information

bash-4.2# lsvg -l bkpvg
bkpvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
loglv01 jfs2log 1 1 1 open/syncd N/A
fslv01 jfs2 900 900 2 open/syncd /u04
fslv04 jfs2 20 20 1 closed/syncd /test
bash-4.2#

3) remove lv ( if you want)

bash-4.2# rmlv fslv04
Warning, all data contained on logical volume fslv04 will be destroyed.
rmlv: Do you wish to continue? y(es) n(o)? y
rmlv: Logical volume fslv04 is removed.

4) create lv

crfs -v jfs2 -g bkpvg -m /mount2 -a size=20G -A yes

bash-4.2# crfs -v jfs2 -g bkpvg -m /mount2 -a size=20G -A yes
File system created successfully.
20970676 kilobytes total disk space.
New File System size is 41943040
bash-4.2#

5) Mount it

bash-4.2# mount /mount2
bash-4.2# df -g
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/hd4 5.50 5.32 4% 10540 1% /
/dev/hd2 7.50 5.10 33% 53148 5% /usr
/dev/hd9var 5.75 5.30 8% 8979 1% /var
/dev/hd3 5.25 4.99 5% 379 1% /tmp
/dev/fwdump 5.50 5.26 5% 5 1% /var/adm/ras/platform
/dev/hd1 5.25 5.25 1% 61 1% /home
/dev/hd11admin 0.25 0.25 1% 5 1% /admin
/proc - - - - - /proc
/dev/hd10opt 4.50 4.29 5% 9009 1% /opt
/dev/livedump 0.25 0.25 1% 4 1% /var/adm/ras/livedump
/aha - - - 16 1% /aha
/dev/fslv00 49.00 37.71 24% 41097 1% /u02
/dev/fslv02 700.00 178.07 75% 111 1% /u03
/dev/fslv01 900.00 707.31 22% 631 1% /u04
/dev/fslv03 19.00 19.00 1% 4 1% /rootvgbkp
/dev/fslv04 20.00 20.00 1% 4 1% /mount2
bash-4.2#
bash-4.2#

6) Export it for nfs

smit nfs --> Network file system --> Add a Directory to Exports List

Add a Directory to Exports List

Type or select values in entry fields.
Press Enter AFTER making all desired changes.

[TOP] [Entry Fields]
* Pathname of directory to export [/mount2] /
Anonymous UID [-2]
Public filesystem? yes +
* Export directory now, system restart or both now +
Pathname of alternate exports file []
Allow access by NFS versions [] +
External name of directory (NFS V4 access only) []
Referral locations (NFS V4 access only) []
Replica locations []
Ensure primary hostname in replica list yes +
Allow delegation? no +
Scatter none +
* Security method 1 [sys,krb5p,krb5i,krb5,dh] +
[MORE...24]

7) View the status

bash-4.2# showmount -e
export list for ehbkpdb1:
/rootvgbkp (everyone)
/mount2 (everyone)
bash-4.2#

-- View exported filesystems to do nfs mount ( to be excuted in remote host) from x.x.9.31
bash-4.2# showmount -e 192.168.1.1
export list for 192.168.1.1:
/rootvgbkp (everyone)
/mount2 (everyone)
bash-4.2#

8) pre-requisites

a) Add hostname in '/etc/hosts' both source and target systems
b) Export the directory in source system
c) Create a empty directory in target system (/)

9) create nfs

smit nfs --> Network file system --> add file system for mounting -->

Add a File System for Mounting

Type or select values in entry fields.
Press Enter AFTER making all desired changes.

[TOP] [Entry Fields]
* Pathname of mount point [/u03] /
* Pathname of remote directory [/u03]
* Host where remote directory resides [192.168.1.1]
Mount type name []
* Security method [sys] +
* Mount now, add entry to /etc/filesystems or both? now +
* /etc/filesystems entry will mount the directory yes +
on system restart.
* Mode for this NFS file system read-write +
* Attempt mount in foreground or background background +
Number of times to attempt mount [] #
Buffer size for read [] #
Buffer size for writes [] #
[MORE...26]

10) verify

# df -gt
Filesystem GB blocks Used Free %Used Mounted on
/dev/hd4 11.00 0.20 10.80 2% /
/dev/hd2 4.50 2.92 1.58 65% /usr
/dev/hd9var 4.50 0.44 4.06 10% /var
/dev/hd3 10.50 2.55 7.95 25% /tmp
/dev/hd1 20.50 7.08 13.42 35% /home
/dev/hd11admin 0.50 0.00 0.50 1% /admin
/proc - - - - /proc
/dev/hd10opt 5.50 0.14 5.36 3% /opt
/dev/livedump 0.50 0.00 0.50 1% /var/adm/ras/livedump
/dev/fslv00 98.00 56.47 41.53 58% /u01
192.168.1.1:/u03 20.00 0.00 20.00 1% /u03
#

11) To Take rootvg backup: (aix)

e.g.,

# mksysb -i -e -p -v /rootvgbkpn1/DB01/node1

Hope it works for you.

Gouranga's Tech Blog

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May 20, 2016

creating volume groups and mount storage in IBM-AIX

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