Instruct: Classify a given Amazon review as either positive or negative.
Query: Drive arrived defective; 75% failure rate

I returned this drive after struggling with it for a few days. On arrival the SCSI address selector did not work; had to use preset address 3. Then the AHA7890 scsi adapter would recognize the drive only after I changed my scanner's address to 4, and lower the speed in the bios from 80 to 20 Mhz.Windows reported the existence of the drive but CD-creator or DirectCD could not find it.Under Linux I managed to use the drive but only at writing speed 1, resulting in a 75% failure rate (i.e., 1 out of four disks!).I e-mailed QPS customer service -- they never replied.I finally got a Cendyne 20x10x40 IDE drive, which works fine both under W2k and Linux by loading the ide-scsi module with Xcdroast