Changing block size of a file system

[Roberto Volsa]

Hello,
in my system there are a lot of file system sith a block size of 1024 (i checked it with "mkfs -m" command). I have to change it to 8k.
Other than remove and recreate the logical volumes, are there any other ways to do this?

Thanks in advance

Roberto

[Patrick Wallek · Accepted solution]

I don't think there is any way to do this other than to recreate the LVs and restore you data.

I am just curious, why do you need to change the filesystem block size to 8K?

[Roberto Volsa]

Oracle suggests to work with 8K block size

[Sanjay_6]

Hi Roberto,

you'll have to recreate the filesystem with the new block size.

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000064722570

Hope this helps.

Regds

[Thierry Poels_1]

Hi,

extract from Metalink:

<<>>

Reorganization might not be worth all the work.

best regards,
Thierry.

[A. Clay Stephenson]

Unless this is an hfs filesystem (in which case you are already taking a big performance hit) blocksize really doesn't matter - in spite of what Oracle tells you. Vxfs filesystems are extent-based and block size is really not a critical factor although it certainly is in hfs filesystems.