Change the block size of file system from 4K to 8K

[George Magklaras]

I assume that you are setting this up with ext3 and hence my answer ties 
to this. If your filesystem is different, you should say so.

Note: *In ext3, an 8K block size on the fs is only possible if you use 
Itanium and other 8K architectures. If your architecture is x86, x86_64, 
it is not possible to have a block size greater than 4k*. If you try to 
make an ext3 fs you will fail with an error message similar to this:

mkfs.ext3: 8192-byte blocks too big for system (max 4096)

So,if your server architecture can take it, you can
i)use parted post installation to make the partition and then type the 
following example (if your partition is called for instance /dev/sda2):

mkfs -t ext3 -b 8192 /dev/sda2

ii)There is also kickstart 
(http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Installation_Guide/ch-kickstart2.html). 
 From a quick browsing on the RedHat manual, I cannot find the exact 
switch to specify  block size (must be set with size)

#part / --fstype ext3 --size=1024...etc

So, I would recommend number i) as a faster option.


-- 
--
George Magklaras BSc Hons MPhil
RHCE:805008309135525

Senior Computer Systems Engineer/UNIX-Linux Systems Administrator
EMBnet Technical Management Board
The Biotechnology Centre of Oslo,
University of Oslo
http://folk.uio.no/georgios







Amged Ahmed Kushlaf wrote:
> Dear RedHat experts,
> 
>  
> 
> The default block size of redhat operating system ( /) is 4K, so how can I
> change the block size of the root directory ("/") to 8K during the
> installation.
> 
> If not possible during the installation, so Is there any other ways to make
> it 8K.
> 
>  
> 
> Your help is highly appreciated
> 
>  
> 
> Thanks,
> 
>  
> 
> Amged
> 
>  
>