FS is frequently facing i/o errors

Hi All,

I am using storage foundation 6.1 with Solaris10 u10. FS are frequently facinf i/o errors. I am unounting the FS and mounting it back. It is mounting it back without any issues. but I would like to why it is happening regularly. Below output is showing when I am trying to get the FS version. Is it causing the issue? or why it is showing below unrecognized superblock. Please advice. Thanks in advance.

 fstyp -v /dev/vx/dsk/XXXX/XXXX|grep -i version
Unrecognized Superblock.  error = 5052
magic XXXX  version 7  ctime Wed Oct 03 20:35:59 2012