How to check snapshot . . ,

[piyush mathiya]

Gurus,
I am facing problem while extending online JFS file system, I am getting error "mismatch : command version 35 - kernel version 33" I have checked the reason for this, there are mainly four reason. I am not getting how to check that snapshot is running or not.

Regards,
Piyush Mathiya

[James R. Ferguson]

HI:

Have a look at the Technical Knowledge Base document ID: emr_na-c00940627-4 .

http://www.itrc.hp.com/service/cki/docDisplay.do?docLocale=en&docId=emr_na-c00940627-4

Regards!

...JRF...

[vijay alur]

Hi Piyush ,
could you please brief about your problem.

what are the four reasons?????

by the way the steps for online JFS extending is as follows.

lvextend -L size in MB /dev/vg##/lvol#

fsadm -F vxfs -b size in MB /mountpoint

have you followed these steps???

and what is this snapshot????

[Rasheed Tamton]

Hi Piyush,

Looks like you did it from using SAM. Try from the command prompt.

First lvextend the LV; then fsadm the mount point as Vijay said.

It is better to give more details in order to get quick assistance from forum members.

Regards,
Rasheed Tamton.

[rajasekar.m]

Basics of OnlineJFS
â ¢ Online FS resizing ,file defragmentation and directory optimization
â ¢ Online snapshot with support for common backup utilities
â ¢ Discovered direct I/O for optimal through-put of large reads/writes
â ¢ Support multi pathing functionality & extent attributes feature
WHAT IS SNAPSHOT
A snapshot is a method of an online backup of data. An image of a
mounted file systembecomes an exact read-only copy of the file system at
a certain point in time
Creation of a file system with largefile-option (files larger than 2GB):
# mksf â F vxfs â o version=4 /dev/vgXX/rlvolX (for disk layout 4)
Repair of an inconsistent file system
fsck â F vxfs [-o full] [-y] /dev/vgXX/rlvolX

also u can check the thru bdf command, the backup mount point will be existing while snapshot is running, please unmount it, thn try to extend it.

[Tim Nelson]

I second Vijay's questions.

1) do you own OnlineJFS ?
2) What command are you executing ?
3) What does extending the filesystem have to do with snapshot running ( explain snapshot )

[Prashanth Waugh]

Hi piyush,

First check you hav online jfs or not

#swlist -l product |grep -i jfs

Regards
Atul