mounting an ext4 filesystem with block size of 65536

[Jon Grant]

Oguz Yilmaz wrote, On 05/02/11 14:41:
> Dear list members,
>
> I do some benchmarking on EXT4 performance on Compact Flash media.
> I have created an ext4 fs with block size of 65536. however I can not
> mount it on ubuntu-10.10-netbook-i386.

Remember this is logical block size of 64KB. The block device driver may 
function in 512 byte segments regardless of what the FS block size is. 
May be not worth your time investigating.

> According to my readings on ext4 it should allow such big block sized
> fs. I want hear your comments.

Where/what has been read? is it really supported? Have you checked on 
the linux-kernel list or run on another distro?

[.]
> root at ubuntu:~# mount -t ext4 /dev/sda3 /mnt/
> mount: wrong fs type, bad option, bad superblock on /dev/sda3,
>         missing codepage or helper program, or other error
>         In some cases useful info is found in syslog - try
>         dmesg | tail  or so

Have you contacted the "mount" developer mailing list? You will get 
approprietary info than a users mailing list I expect.

Cheers, Jon