Failing disk

1) It shows read/write errors in /var/adm/messages.

2) As the time passes we can see increased number of hard

and transport error when checkd by iostat -En.

3)We can see the disk available when format is used

Failed disk

1)It shows “ disk not responding to selection” message

2)It only shows the increased transport errors

3)Format command displays “ disk not available” message