SCSI Drive formatting

I have a Maxtor 760 meg hard drive model XT-8760S. I can "see" it on the SCSI chain with FWD HD Tool Kit ver. 1.6.2. When I try to format this drive I get the following message:
SCSI Error Code Infromation
Command: Format Unit
Sense Key: Medium error
Sense Data: Defect List Error

What does this mean and how did it get thiw way.
Thanks for any help you can give.
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This sounds like your HD has server hardware errors. Try formating
your HD on a different computer. If this doesn't work, you have to
exchange your HD to a new one.

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more information is needed. scsi drivers go out of date almost every time apple brings out a new system. the currnet version of FWB is 2.0.6. there are other things that need to be addressed as well. i see no mention in your question of a server and therefore, disagree with rbr's response (no offense rbr). your drive can be seen on the scsi chain because the info you are seeing is on the scsi controller board of the drive, not on the platters. we need to know:
what OS version
what machine
what other scsi devices are connected
it is doubtful that your drive is toast.
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Sounds Like you need to check the drive for proper termination?
Do you have an active terminator on the chain?

Of course you know that the XT-8760S is an "antique".  I'm assuming that you got it 2nd hand.  Do you know that the drive is good?  With a drive this old, and likely removed from service in another system, it could be bad.
In addition, try performing a Low Level format.

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