Help with SCSI-2

[lkhaider@concentric.net (Laer Haider)]

I received a free Seagate ST-3610N 535MB SCSI-2 HDD (technical details
follow).  I was hoping to use it on my IIgs as a replacement HD
(faster and bigger), but ran into some trouble.  After formatting and
partitioning it (6 ProDOS and 1 HFS partition) using the utilities
built into the RamFAST v3.01f SCSI card, I rebooted.  Everything
mounted fine; Finder displayed the extra partitions (wasn't using all
of them, but I tried that later).  I initialized each partition,
including one HFS partition.  All is good.  Then I tried to copy from
my old HD to the new one.  After about 5 minutes of copying, the
system locked.

I rebooted, tried again, same thing.  Using ProSel I tried to check
the drive for bad blocks, system locked.  Reboot, and I tried to copy
using ProSel, system locked.  Tried copying from a ProDOS-8 utility,
Cat Doctor, and the system locked as soon as the copy procedure
started.  I tried reformatting and re-partitioning several time to no
avail.

Deactivate the drive and everything is OK.  Hooked it up to my PC,
reformatted, everything's great!  I was able to copy 500MB to the
drive with no problems.  No, I don't need it on the PC.  It's already
got over 4GB of drive space.

Am I missing something here?  Are SCSI-2 devices not compatible with
the RamFAST?  Not compatible with SCSI-1 devices?  The Apple IIgs?  Is
there some hardware hack I can do?  Some driver I can use?

My system is set up as follows:
	ROM 1 Apple IIgs.
	2- 3.5" Apple drive
	2- 5.25" floppy drives (1 Apple and 1 Mitac)
	RamFAST v3.01f  (got this in June `96, repaired Feb. `97)
	105MB Toshiba SCSI HDD
    --> 535MB Seagate SCSI-2 HDD
	150MB Bernoulli Box cartridge drive
	Toshiba SCSI CD-ROM drive
	4MB RAM in an OctoRAM memory board
	TransWarp GS accelerator
	PCTransporter
	Stereo Sound Card
	GS/OS system 6.0.1 and using ProSel


                      Seagate ST-3610N
                      ================
       UNFORMATTED CAPACITY (MB) ________________635
       FORMATTED CAPACITY (xx SECTORS) (MB) _____535
       AVERAGE SECTORS PER TRACK ________________79 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________13,104
       CYLINDERS __PHYSICAL______________________1,872 (user)
       HEADS ______PHYSICAL______________________7
       DISCS (3.5 in) ___________________________4
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec)________25 to 41
       EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async
       EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
       SPINDLE SPEED (RPM) ______________________5,411
       AVERAGE LATENCY (mSEC) ___________________5.54
       BUFFER ___________________________________240 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2 FAST
       BYTES PER TRACK (unformatted) ____________48,460 average
       SECTORS PER DRIVE ________________________1,046,205
       TPI (TRACKS PER INCH) ____________________2150
       AVERAGE ACCESS (ms) (read/write)__________10.5/11.2
         Drive level without controller overhead
       SINGLE TRACK SEEK (ms) ___________________2
       MAX FULL SEEK (ms) _______________________24
       MTBF (power-on hours) ____________________200,000
       POWER REQUIREMENTS: +12V START-UP (amps) _1.5
                           +12V TYPICAL (amps) __0.4
                           +5V START-UP (amps) __
                           +5V TYPICAL (amps) ___0.6
                           TYPICAL (watts) ______6.5
                           MAXIMUM (watts) ______
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):     1.00/25.4
                        Width  (inches/mm):     4.02/102.1
                        Depth  (inches/mm):     5.77/146.6
                        Weight    (lbs/kg):     1.5/0.68

Already low-level formatted at the factory with one spare sector
per track and two spare cylinders/unit.

ZBR = Zone Bit Recording = Variable sectors per track

Any help?