Unix system administration is not an easy job and attending interview is an another toughest one.If its come to Solaris then you should have good knowledge in veritas products like VXVM & VCS. As far as I know that only one enterprise Unix is keep on changing from one version to another version.That is none another than Solaris. If you see Solaris 9 to Solaris 10, there are plenty of changes in architectural level and many commands got changed.Now again from Solaris 10 to Solaris 11 most of the networking parts and resource management parts are changed. Here i would like to share some of the interview questions on veritas volume manager which will help you to succeed in Unix interviews.VxVM Disk
Q-1 How to add a disk to a disk group in Veritas Volume Manager?
Ans: To add the physical disk c0t0d0 in the disk group homedg calling it disk90 in Veritas in Volume Manager:
# vxdg -g homedg adddisk disk90=c0t0d0
Q-2 How to remove a disk from a disk group in Veritas Volume Manager?
Ans: To remove a disk, disk90, from a disk group, homedg, in Veritas Volume Manager:
# vxdg -g homedg rmdisk disk90
Q-3 How to clear an import in Veritas Volume Manager after a crash?
Ans: # vxdisk clearimport c0t0d0s0
Q-4 How to list all disks and display their status in VxVM?
Ans: # vxdisk list
Q-5 How to remove a grayed out or obsolete disk, or remove a disk from a disk group in Veritas Volume Manager?
Ans: # vxdisk rm disk01
Q-6 How to remove a disk so that it is no longer under Veritas Volume Manager controls?
Ans: # vxdisk rm c0t0d0
Q-7 How to add or bring a disk under Veritas Volume Manager control?
Ans: To add or bring a disk under Veritas Volume Manager control:
# vxdiskadd c0t0d1
or
# vxdisksetup -i c0t0d1
Note: It might help to newfs the s2 slice of the disk and perform a vxdctl enable to get it to add a disk.
Q-8 How to remove a volume and any subdisks and plexes associated in VxVM?
Ans: # vxedit -rf rm volume_name
Q-9 How to rename the disk disk90 to be called disk80 in the group rootdg in Veritas Volume Manager?
Ans: # vxedit -g rootdg rename disk90 disk80
Q-10 How to set disk90 in the group homedg to be a hot spare in Veritas Volume Manager?
Ans: # vxedit -g homedg set spare=on disk90
Q-11 How to set the comment field of subdisk subdisk01-01 to “comments are here”?
Ans: # vxedit set comment”comments are here” subdisk01-01
Q-12 How to sets the user to ep, the group to epgrp and the mode rw-rw-rw on the volume vg01?
Ans: # vxedit set user=ep group=epgrp mode=0666 vg01
Disk Group
Q-1 How to display the default disk group?
Ans: #vxdg defaultdg
Q-2 How to set the default disk group?
Ans: # vxdctl defaultdg <disk group>
Q-3 How to display disk group information?
Ans: # vxdg list or
# vxdg list <disk group>
Q-4 How to display free disk space in disk group?
Ans: # vxdg free or
# vxdg –g <disk group> free
Q-5 How to create a disk group?
Ans: # vxdg init <disk group> cds=on|off
Q-6 How to create a disk group with a specified disk group version no.?
Ans: # vxdg –T <DG version> init <disk group>
Q-7 How to make a non CDS disk group to CDS disk group or vice versa?
Ans: # vxdg –g <disk group> set cds=on|off
Q-8 How to import a disk group?
Ans # vxdg import <disk group>
Q-9 How to import a destroyed disk group?
Ans: First you must know the DG ID of the destroyed disk group name. You can get the DG ID by displaying the included disk of destroyed DG.
# vxdg import <DG ID>
Q-10 How to disable/deport a disk group?
Ans: # vxdg deport <disk group>
Q-11 How to rename a disk group during import operation?
Ans: # vxdg –t –n <new disk group> import <disk group>
Q-12 How to rename a disk group during deport operation?
Ans: # vxdg –n <new disk group> deport <disk group>
Q-13 How to clear locks on disk group during import?
Ans: # vxdg –C import <disk group>
Q-14 How to forcible import the disk group?
Ans: # vxdg –f import <disk group>
Q-15 How to move disk group object from one DG to another?
Ans: # vxdg –o expand move <source DG> <target DG> <DG object>
# vxdg –o expand move datadg newdatadg disk01
It will move the entire associated object with disk02 from datadg to newdatadg.
Q-16 How to split a disk group to form a new disk group?
Ans: # vxdg –o expand split <old DG> <new DG> disk01 disk02
It will create a new DG with two specified disks.
Q-17 How to join two DGs into one?
Ans: # vxdg join <source DG> <target DG>
Q-18 How to destroy a disk group?
Ans: # vxdg destroy <disk group>
Q-19 How to upgrade a Disk group?
Ans: # vxdg upgrade <disk group>
It will upgrade the DG to the highest DG version supported by VxVM.
Or
# vxdg –T <Version No.> <disk group>
To upgrade to a specified version no.
We will see vxvm volume related interview questions on next part.
Check out the wonderful VXVM commands Man page.
[showglossary gid=”1717″]
All the VXVM command’s manual pages have been contributed by JAIS.
Thank you for reading this article.Please leave a comment if you have any doubt ,i will get back to you as soon as possible.