hi

This error message always come on my machine
when i try to type something.
Is that means that my hard disk is screwed up or what?
because of this many application is not working

<4>SCSI error : <0 0 0 0> return code = 0x8000002
<4>Current sda: sense key Aborted Command
<4>Additional sense: Scsi parity error
<4>end_request: I/O error, dev sda, sector 37109591
<3>Buffer I/O error on device sda1, logical block 4638691
<4>lost page write due to I/O error on sda1
<4>SCSI error : <0 0 0 0> return code = 0x8000002
<4>Info fld=0x0, Current sda: sense key Aborted Command
<4>end_request: I/O error, dev sda, sector 37109599
<3>Buffer I/O error on device sda1, logical block 4638692
<4>lost page write due to I/O error on sda1
<4>SCSI error : <0 0 0 0> return code = 0x8000002
<4>Current sda: sense key Aborted Command
<4>Additional sense: Scsi parity error
<4>end_request: I/O error, dev sda, sector 37110615
<3>Buffer I/O error on device sda1, logical block 4638819
<4>lost page write due to I/O error on sda1
<4>SCSI error : <0 0 0 0> return code = 0x8000002
<4>Current sda: sense key Aborted Command
<4>Additional sense: Scsi parity error
<4>end_request: I/O error, dev sda, sector 37109607

Yes. Your disk (SATA or SCSI) is bad.

You may try to mark the defective blocks using "fsck -cc". You need to boot the machine in single user mode, or by a CD live if the partition with bad blocks is /boot or /.

This process may take hours to finish. I mean, dozen of hours.

And there are chances the problem is not in the disk surface itself. In this case the problem will show up again.