OS block size

Hi Guys,

Can someone tell me how i can find out my OS block size in AIX 5.3 & in Linux (Red Hat 4.3)?
Thanks in advance...

Hi

AIX
lsfs -q file-system-name or use smit

Linux
/sbin/dumpe2fs /dev/hda1 | grep "Block size"

regards
Hrishy

Thnx a lot Hrishy...