Install Seagate Barracuda 4 drive

[kwoolridge]

Hello,

I have an Amiga 4000T with a GVP SCSI A4000D 68060 Rev 2 controller.  I am
attempting to install a Seagate Barracuda 4 (ST15150N) drive.  Actually, I
have two of these drives but am trying to get one to work before installing
the other.

First, I am a software engineer, not a "hardware" guy.  All this termination
stuff is Greek to me.  Since I have had SCSI drives in this machine before
and they worked fine.  According to Seagate documentation, both ends of a
SCSI chain are to be terminated.

Seagate doc: http://ftp://ftp.seagate.com/acrobat/install_guides/barracuda/8870b.pdf

I am assuming that:

1)  the GVP controller board is terminated properly
2)  the GVP controller board is a SCSI 2

Example 1:

+----------------+           +----------------+
|  controller      |----------|   hard drive    |
+----------------+           +----------------+
   terminated                     terminated

Example 2:

+----------------+           +----------------+            +----------------+
|  controller       ----------|   hard drive    |----------|   hard drive    |
+----------------+           +----------------+            +----------------+
   terminated                                                           terminated




I am attempting to install one drive as in example 1.   I have put a jumper
on J01 pins 1 and 2 which is "Enable drive terminator".  When I run
ExpertPrep, it appears to "see" the drive at address 0 (it shows it is a
Seagate drive but the size is 0).

I have not yet attempted to install both drives.

If you have any information or advice, I would greatly appreciate it.
If you need more info, let me kmow and I'll try to send what you need.

Thank you!

Ken
email: kwwoolridge@hotmail.com

[marmotta]

Hello,

I have an Amiga 4000T with a GVP SCSI A4000D 68060 Rev 2 controller.  I am
attempting to install a Seagate Barracuda 4 (ST15150N) drive.  Actually, I
have two of these drives but am trying to get one to work before installing
the other.

First, I am a software engineer, not a "hardware" guy.  All this termination
stuff is Greek to me.  Since I have had SCSI drives in this machine before
and they worked fine.  According to Seagate documentation, both ends of a
SCSI chain are to be terminated.

Seagate doc: http://ftp://ftp.seagate.com/acrobat/install_guides/barracuda/8870b.pdf

I am assuming that:

1)  the GVP controller board is terminated properly
2)  the GVP controller board is a SCSI 2

Example 1:

+----------------+           +----------------+
|  controller      |----------|   hard drive    |
+----------------+           +----------------+
   terminated                     terminated

Example 2:

+----------------+           +----------------+            +----------------+
|  controller       ----------|   hard drive    |----------|   hard drive    |
+----------------+           +----------------+            +----------------+
   terminated                                                           terminated




I am attempting to install one drive as in example 1.   I have put a jumper
on J01 pins 1 and 2 which is "Enable drive terminator".  When I run
ExpertPrep, it appears to "see" the drive at address 0 (it shows it is a
Seagate drive but the size is 0).

I have not yet attempted to install both drives.

If you have any information or advice, I would greatly appreciate it.
If you need more info, let me kmow and I'll try to send what you need.

Thank you!

Ken
email: kwwoolridge@hotmail.com

I have the same drive, you need one active terminator at the end of the cable, and place the jumper to "Term power from scsi bus". I not have tried with buld-in terminator.

[Acill]

Active terminator-----gvp scsi-----hard disk-------Active terminator

[rockape]

Hi kwoolridge,

See  http://www.wonkity.com/~wblock/SCSI/SCSIExamples.html

Quote

"3. Some GVP controllers. For a while, it seemed like all the email I received was from owners of GVP controllers.

For many of these people, upgrading to the Guru ROM solved their problems.

Disabling termination on some of these boards is also non-trivial; Guru ROM author Ralph Babel explains:

"Most GVP cards use only two 10-pin SIP terminators _plus_ two extra resistors (SMD, except for the very first revisions of the Series-II hard card) for the parity line for a total of 17 terminated lines (they leave out the RST line)."

The use of SMD (Surface Mount Device) resistors complicates disabling termination on these boards. It will be simplest for many users to reorganize the SCSI bus so that the controller is on one end."

I'm no expert but I hope this helps.


Regards, Michael

aka rockape

[magnetic]

OP
You may not need active termination at both ends if your board supports termination and your drive does. IIRC Seagate baraccuda 4gb has built in termination enabled by jumpers look up the manual online..

[Acill]

OP
You may not need active termination at both ends if your board supports termination and your drive does. IIRC Seagate baraccuda 4gb has built in termination enabled by jumpers look up the manual online..

I just looked at one of my Barracuda drives and it does have a termination jumper.