[root@ad /var]# top
bash: top: command not found
[root@ad /var]# ls
ls: cache: Input/output error
ls: db: Input/output error
ls: local: Input/output error
ls: preserve: Input/output error
ls: state: Input/output error
ls: tmp: Input/output error
ls: catman: Input/output error
ls: yp: Input/output error
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May  9 03:59:11 ad kernel: SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 28000002
May  9 03:59:11 ad kernel: Info fld=0x50005f, Deferred sd08:01: sense key Hardware Error
May  9 03:59:11 ad kernel: Additional sense indicates No seek complete
May  9 03:59:11 ad kernel: scsidisk I/O error: dev 08:01, sector 5243136
May  9 03:59:16 ad kernel: SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 28000002
May  9 03:59:16 ad kernel: Info fld=0x58012f, Deferred sd08:01: sense key Hardware Error
May  9 03:59:16 ad kernel: Additional sense indicates No seek complete
May  9 03:59:16 ad kernel: scsidisk I/O error: dev 08:01, sector 5768144
May  9 03:59:16 ad kernel: IO error syncing ext2 inode [sd(8,1):00058111]
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^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Jun 27 17:05:36 ad syslogd 1.3-3: restar
t.