linuxNotes: encapsulating disk in linux for vxvm

Soby, I am heading out. But basically you will do the folloowing.

Become root, run vxdiskadm, select option 2, then enter sda when it asks for which disk, then it will ask for disk group, type "rootdg", then accept the defaults and watch the screen.. it will ask you to reboot the system, if everything is successful. Do so, It will reboot about 2-3 times for encapsulation.. Try to access the system after 30min. or so, it should be up. Once you login, check df -k and see if you see /dev/vx/dsk/bootdg/rootvol etc. instead of /dev/sdaX, then it means the disk is encapsulated.

$ uname –a (to see the kernel version)
Linux etrntmdevw 2.4.21-47.0.1.ELsmp #1 SMP Fri Oct 13 17:56:20 EDT 2006 i686 i686 i386 GNU/Linux

$ hostname

etrntmdev

Using keyboard-interactive authentication.

Password for sobyjose@ent.wfb.bank.corp:

$ sudo su -

We trust you have received the usual lecture from the local System

Administrator. It usually boils down to these three things:

#1) Respect the privacy of others.

#2) Think before you type.

#3) With great power comes great responsibility.

Password for sobyjose@ent.wfb.bank.corp:

[root@etrntmdev root]# ls

ORIG..bash_profile bplog.rest.002 cdunixj1

anaconda-ks.cfg bplog.rest.003 install.log reset_pass

bplog.rest.001 bplog.rest.004 install.log.syslog services

[root@etrntmdev root]# vxdiskadm

Volume Manager Support Operations

Menu:: VolumeManager/Disk

1 Add or initialize one or more disks

2 Encapsulate one or more disks

3 Remove a disk

4 Remove a disk for replacement

5 Replace a failed or removed disk

6 Mirror volumes on a disk

7 Move volumes from a disk

8 Enable access to (import) a disk group

9 Remove access to (deport) a disk group

10 Enable (online) a disk device

11 Disable (offline) a disk device

12 Mark a disk as a spare for a disk group

13 Turn off the spare flag on a disk

14 Unrelocate subdisks back to a disk

15 Exclude a disk from hot-relocation use

16 Make a disk available for hot-relocation use

17 Prevent multipathing/Suppress devices from VxVM's view

18 Allow multipathing/Unsuppress devices from VxVM's view

19 List currently suppressed/non-multipathed devices

20 Change the disk naming scheme

21 Change/Display the default disk layouts

22 Mark a disk as allocator-reserved for a disk group

23 Turn off the allocator-reserved flag on a disk

list List disk information

? Display help about menu

?? Display help about the menuing system

q Exit from menus

Select an operation to perform: 2

Encapsulate one or more disks

Menu:: VolumeManager/Disk/Encapsulate

Use this operation to convert one or more disks to use the Volume Manager.

This adds the disks to a disk group and replaces existing partitions

with volumes. Disk encapsulation requires a reboot for the changes

to take effect.

More than one disk may be entered at the prompt. Here are some disk

selection examples:

sda: add only disk sda

sdb hdc: add both disk sdb and hdc

xyz_0 : a single disk (in the enclosure based naming scheme)

xyz_ : all disks on the enclosure whose name is xyz

Select disk devices to encapsulate:

[<pattern-list>,list,q,?] sda

Here is the disk selected. Output format: [Device_Name]

sda

Continue operation? [y,n,q,?] (default: y) y

You can choose to add this disk to an existing disk group or to

a new disk group. To create a new disk group, select a disk group

name that does not yet exist.

Which disk group [<group>,list,q,?] rootdg

There is no active disk group named rootdg.

Create a new group named rootdg? [y,n,q,?] (default: y) ----> <enter>

Use a default disk name for the disk? [y,n,q,?] (default: y) ----> <enter>

A new disk group will be created named rootdg and the selected

disks will be encapsulated and added to this disk group with

default disk names.

sda

Continue with operation? [y,n,q,?] (default: y) ----> <enter>

The following disk has been selected for encapsulation.

Output format: [Device_Name]

sda

Continue with encapsulation? [y,n,q,?] (default: y) ----> <enter>

A new disk group rootdg will be created and the disk device sda will

be encapsulated and added to the disk group with the disk name rootdisk.

Enter desired private region length

[<privlen>,q,?] (default: 2048) ----> <enter>

Continue with encapsulation? [y,n,q,?] (default: y) ----> <enter>

VxVM vxencap INFO V-5-2-1923 Encapsulating root disk...

VxVM vxencap INFO V-5-2-2123 Verifying generated partition-table...

VxVM vxencap INFO V-5-2-0 Checking private region location of root disk ...

VxVM vxencap INFO V-5-2-1946 Generating VxVM initrd image...

VxVM vxinitrd INFO V-5-2-3588 Initializing...

VxVM vxinitrd INFO V-5-2-3573 Creating initrd image for

kernel 2.4.21-47.0.1.ELsmp.

Please wait(few minutes)...

NOTE: Until next reboot, none of the 'lilo' settings should

be tampered. Otherwise, your system may not boot!

VxVM vxencap INFO V-5-2-2414 Adding vxvm_root entry to 'lilo'...

VxVM vxencap INFO V-5-2-2191 updating /etc/lilo.conf ...

VxVM vxencap INFO V-5-2-2192 updating lilo...

VxVM vxencap INFO V-5-2-2377 Please save /etc/vx/rootdisk_info.etrntmdev

on some other server. Information in this file can be useful for recovery in

case of unknown failures.

NOTE: After your system comes up with rootdisk encapsulated,

never run any of LILO's fallback/lock/-R options. LILO does not understand

VxVM devices properly and using above commands may render your system

unbootable

The sda disk has been configured for encapsulation.

The first stage of encapsulation has completed successfully. You

should now reboot your system at the earliest possible opportunity.

VxVM NOTICE V-5-2-2044

The encapsulation will require two or three reboots which will happen

automatically after the next reboot. To reboot execute the command:

shutdown -r now

This will update the /etc/fstab file so that volume devices are

used to mount the file systems on this disk device. You will need

to update any other references such as backup scripts, databases,

or manually created swap devices.

Encapsulate other disks? [y,n,q,?] (default: n) ----> <enter>