unable to mount newly created file system on bcv server after the BCV operation

[caj]

Hi ,

We have created new file system on production server .after the BCV operation we are not able to mount this file system on backup server .We are getting the following error



root:lion# fsck -F vxfs -o full /dev/pcdmvg_23_01a/rfs_rdbm704

invalid super-block

search for auxiliary super-block? (ynq)y

alternate super-block not found

vxfs fsck: cannot initialize aggregate

file system check failure, aborting ...



root:lion# mount /dev/pcdmvg_23_01a/fs_rdbm704 /pcdm/rdbm704

mount - unrecognized vxfs version number




Your help will be higly appreciated

[Geoff Wild]

Did you perform a split?

Did you vgimport the vg on the bcv server?

As far as "unrecognized vxfs version number" - do both servers have the same OS revision? IE 11iv1?

If not - then you can NOT create a filesystem on the higher one with the defaults (IE don't newfs) - you need to use mkfs_vxfs - do a man on that - I think you need the option version=3 (or 4) depending of what your bcv server is at.

Rgds...Geoff

[caj]

BCV is alredy in split state .Ther is some os version mismatch .The production server is having 11.11 and the BCV server is having only 11.00.The file system in the production side is having layout version 4

I thing i need to install JFS3.3 on the BCV server to identify the version 4 FS .Pls confirm

Thanks
Ajeesh

[A. Clay Stephenson]

That is correct.

[Geoff Wild]

Or recreate the file system with version=3 or upgrade the 11.0 to 11.i.

Rgds...Geoff

[caj]

Hi all ,

If i upgrade to JFS 3.3 ,will i loose any data in my existing File system .How complex this upgradation ? do i need to take more care while upgradating to JFS 3.3(linke taking entire backup ..etc)?Is it possible to rollback the change ,if i face some other problem after upgrade ?

[James R. Ferguson · Accepted solution]

Hi Aleesh:

You can download JFS 3.3 for 11.0 here:

http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=B8861E

A reboot is required for installation, since kernel filesets are installed.

Consider that support for 11.0 ends December 2006, so doing this now may be a wise choice.

Having installed the new version, you use 'vxupgrade' to change the filesystem version from 3-to-4. This is a very quick, straightforward operation and no data will be lost. As always, for the utmost safety, backup your filesystem first.

http://www.docs.hp.com/en/B2355-90681/vxupgrade.1M.html

Regards!

...JRF...

[caj]

Hi JRF.

Thanks for your reply.

1) Is it possible to downgrade the file system layout version from 4 to 3 ?? .

Will my data be intact?

2) If I'm upgrading my 11.00 box from JFS 3.1 to 3.3 , what will be the impact on existing layout 3 file system ??

3) Will everything mount normally?? Or we have to do some integrity check on file systems?

4 ) Can I rollback to JFS 3.1 from 3.3 after installation, in case a failback is required? Will I require to select any additional option during installation for enabling rollback?

This is a production box requiring 24*7 uptime. So What are all other precautions to be taken care like Minimum patch level required etc..

Thanks in advance.

Ajeesh.

[rayche]

Hi, to your first question, I think disk layout version cannot be downgraded!

[rayche]

to your 2 and 3 question, I think there is any impact to your other filesystem, the 4th question is same as 1st, the answer is : disk layout cannot be downgraded.

[rayche]

sorry, I modified my second answer, to 2and 3quetion, there is NO any impact to your other fs...........................

:)

[rayche]

sorry, I lost NO in my second answer," to 2and 3quetion, there is NO any impact to your other fs...........................
"
:)