Async negotiation (Was: 2.0.36/5.1.4 and BIOS settings)

Mike Bilow mikebw at
Wed Dec 9 17:22:12 PST 1998

Dirk Lutzebaeck wrote in a message to Mike Bilow:

 > My drive says (/proc/scsi/scsi)
 > Host: scsi1 Channel: 00 Id: 06 Lun: 00
 >   Vendor: ARCHIVE  Model: Python 04106-XXX Rev: 715G
 >   Type:   Sequential-Access                ANSI SCSI revision: 02
 > which I would interpret to be Scorpion as far as the above document is 
 > concerned, since the revision number is 715G.

 DL> cat /proc/scsi/scsi says:

 DL> Host: scsi0 Channel: 00 Id: 06 Lun: 00
 DL>   Vendor: SEAGATE  Model: DAT    02779-XXX Rev: 658A
 DL>   Type:   Sequential-Access                ANSI SCSI
 DL> revision: 02 

 DL> (switching the DIP switch it says: ARCHIVE)

 DL> Now, your Rev no. seems much higher. How can I flash the
 DL> EEPROM in the  DAT? I asked Seagate about this but haven't
 DL> any answer yet.

You cannot compare firmware revision numbers between different products: a
higher number revision on one product could be older than a lower number
revision on another product.

Some of these drives use One-Time Programmable (OTP) chips to store their
firmware, and these chips are soldered onto the board; such drives cannot be
upgraded.  Other drives use socketed conventional EPROM chips which are clearly
visible through a rectangular cutout on top of the drive assembly. There are
also a few drives which use Flash EEPROM chips which can be updated either
through a proprietary serial data connector on the circuit board or by using a
special tape written in a proprietary format.
-- Mike

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