Need really help - want to replace SCSI HD in MegaSTE - no clue why it doesn't work

[Peter Dassow]

Hi,

after several unsuccessful tries, I am clueless.
My Mega STE worked flawlessly with his ST157N, but it's one of the
smallest HD you can find (no more space now for anything).
So I tried it with a IBM DORS 32160 (SCA version, but I used an adapter
to SCSI-50pin). I didn't hear even the HD drive/motor (may be this drive
was already dead).
Now I buyed a IBM 0662 drive (1.0 GB SCSI, 50pin).
Because this beast have the maximum of jumper for configuration you can
imagine, I made an excerpt from the manual and upload it to my site.
You can take a look at it here: Loading Image...
The red jumpers are my assumption what is necessary.
For the Mega STE, some told me, I should NOT use "active termination".
For classic ST's, this would be different (e.g. for MegaFile's).
At the moment, it does not work, HDDriver (or CBHD or AHDI 6) does not
recognize any drive except my also external connected Syquest 555 drive.

I am not aware of the sense of "Disable UNIT attention" here, also of
the jumper "Disable T.I.Sync Negotiations".
Also, I am not sure about "SCSI bus termination power" and the
additional "Termination Power enable" jumper (which should be related
with the "Enable Active Termination" jumper.

Any help (Mega STE specific) ?

Regards
Peter

[Uwe Seimet]

Post by Peter Dassow
Now I buyed a IBM 0662 drive (1.0 GB SCSI, 50pin).
At the moment, it does not work, HDDriver (or CBHD or AHDI 6) does not
recognize any drive except my also external connected Syquest 555 drive.

This drive, like some other IBM drives, might require the computer to
have a SCSI ID (initiator identification). If this is the case you can
only use it with the full-featured SCSI bus of a TT or Falcon or with a
LINK96/97 host adapter. These are the only host adapters for the ST/STE
which support initiator identification (SCSI ID 7).

Post by Peter Dassow
I am not aware of the sense of "Disable UNIT attention" here, also of
the jumper "Disable T.I.Sync Negotiations".

You should disable both. Enabling unit attention can prevent the Atari
from booting from a drive. The synchroneous transfer negotiation is not
supported by ACSI. Only with a TT or Falcon and a driver with support
for SCSI messages (like HDDRIVER and maybe CBHD) it can be enabled, even
though you would not be able to profit from it with the Atari.

But anyway, provided your drive is not broken the lack of initiator
identification with ACSI ist most likely the problem.

[Thorsten Günther]

Post by Uwe Seimet

Post by Peter Dassow
Now I buyed a IBM 0662 drive (1.0 GB SCSI, 50pin).
At the moment, it does not work, HDDriver (or CBHD or AHDI 6) does not
recognize any drive except my also external connected Syquest 555 drive.

This drive, like some other IBM drives, might require the computer to
have a SCSI ID (initiator identification). If this is the case you can
only use it with the full-featured SCSI bus of a TT or Falcon or with a
LINK96/97 host adapter. These are the only host adapters for the ST/STE
which support initiator identification (SCSI ID 7).

As I had texactly this drive inside my TT030, I can confirm it does
require the computer to have an SCSI ID. It did not boot in the TT030
with original ROM, one has to use a patched ROM, I used tp306v20.lzh and
tospatch.ttp, both which can be found on

<http://markusheiden.de/index.php/atari/tospatch.html>

These were the two modifications necessary:

;*******************************************************************************
;* MH:
;* Nur CRC-Check ausschalten.
;* [ALL]
;*
;* >>> Dieser Patch überschneidet sich mit einem PAK III-Patch, wenn
;* .StaticRAM = 1 ist. Das macht aber nichts, da der entsprechende Patch
;* (Abbruch bei CRC-Fehler im TOS) komplett überschrieben wird.

.KILL_CRC = 0 ;1: Patch einbinden, 0: Patch nicht einbinden

_IF .KILL_CRC
_FILL 7D4,886,$4E71.W
_ENDIF

;*******************************************************************************
;* SE:
;* Initiatoridentification beim SCSI-Zugriff, TT meldet sich als ID 7
;* Damit kann auch von Quantum Empire u.ä. gebootet werden.
;* [ALL]

.SCSI_ID = 0 ;1: Patch einbinden, 0: Patch nicht einbinden

_IF .SCSI_ID
1C40 $70,80
_ENDIF
.SCSI_ID = 0 ;1: Patch einbinden, 0: Patch nicht einbinden

_IF .SCSI_ID
1C40 $70,80
_ENDIF

[Peter Dassow]

Post by Uwe Seimet

Post by Peter Dassow
Now I buyed a IBM 0662 drive (1.0 GB SCSI, 50pin).

This drive, like some other IBM drives, might require the computer to
have a SCSI ID (initiator identification). If this is the case you can
only use it with the full-featured SCSI bus of a TT or Falcon or with a
LINK96/97 host adapter. These are the only host adapters for the ST/STE
which support initiator identification (SCSI ID 7).
[...]
But anyway, provided your drive is not broken the lack of initiator
identification with ACSI ist most likely the problem.

It seems I have again no luck (second time, because I tried a DORS 32160
already). May be no IBM drive can be used with a Mega STE and the
build-in ASCI controller.
I have only set "disable parity" and "autostart", no SCSI-ID jumper set
(that should result in a SCSI-ID = 0).
The drive is not recognized.
Why did I buyed an IBM HD ?
Because I read the recommendations at
http://atari.mnx2010.nl/helpdesk/scsi/scsi.htm ...
This page is not related to a Mega STE, may be the list of "compatible"
drives is totally wrong :-(

Regards
Peter

[Uwe Seimet]

Post by Peter Dassow
This page is not related to a Mega STE, may be the list of "compatible"
drives is totally wrong :-(

At least it is outdated and it appears to be mainly meant for TT and Falcon.
On the other hand, as far as TT and Falcon are concerned such a list is
quite useless because you can use any SCSI-2/3 drive (except for the
differential drives, which have a special signal handling) with them,
i.e. there is no need for such a compatibility list.

[Bravo Sierra Computers]

Dear Peter,

Ask B & C ComputerVisions About This! The Mega STe Is Finicky About Hard
Drives! I Dont Believe It Will Do SCSI 2 Internally! Maybe Externally With
Another Hard Drive! I Asked B & C About This Before! I Prefer Another Host
Adapter Than Atari!

Date: Sun, 13 Nov 2011 13:11:21 +0100
Newsgroups: comp.sys.atari.st
Subject: Re: Need really help - want to replace SCSI HD in MegaSTE - no clue
why it doesn't work

Post by Uwe Seimet

Post by Peter Dassow
Now I buyed a IBM 0662 drive (1.0 GB SCSI, 50pin).

This drive, like some other IBM drives, might require the computer to
have a SCSI ID (initiator identification). If this is the case you can
only use it with the full-featured SCSI bus of a TT or Falcon or with a
LINK96/97 host adapter. These are the only host adapters for the ST/STE
which support initiator identification (SCSI ID 7).
[...]
But anyway, provided your drive is not broken the lack of initiator
identification with ACSI ist most likely the problem.

It seems I have again no luck (second time, because I tried a DORS 32160
already). May be no IBM drive can be used with a Mega STE and the build-in
ASCI controller.
I have only set "disable parity" and "autostart", no SCSI-ID jumper set (that
should result in a SCSI-ID = 0).
The drive is not recognized.
Why did I buyed an IBM HD ?
Because I read the recommendations at
http://atari.mnx2010.nl/helpdesk/scsi/scsi.htm ...
This page is not related to a Mega STE, may be the list of "compatible"
drives is totally wrong :-(
Regards
Peter

Games/Software, Hardware/Accessories & Books/References!Atari Computers,8 Bit & ST Lines + Atari 2600/5200/7800, Jaguar & Lynx Games, Consoles & Hand Held!
FREE Catalogs at http://BensCatalogs.Atari.org or http://BenSells.Atari.org Request Atari Catalogs by E-Mail at ***@aracnet.com or ***@Atari.org &
Please Specify Atari 8 Bit, ST, 2600/7800, 5200, Jaguar and/or Lynx! Call Ben anytime at [phone]! Come For The Sales, Stay For The Service!1978-2011!
Sent on my Atari Computer

[Thorsten Günther]

Post by Peter Dassow
http://atari.mnx2010.nl/helpdesk/scsi/scsi.htm ...
This page is not related to a Mega STE, may be the list of "compatible"
drives is totally wrong :-(

The DCAS-34330 is easy to get and proven to work (some Mega STE owners
at the E-Jagfest had it installed), although you can only use 1 gig of
the 4 this drive provides.

Also, I had no problems with a Quantum LPS270S in my TT030.

HTH,

Thorsten

[Mark E]

Hi Peter
I've had great success with Seagate drives,
specifically ST51080N. Loads of room and really quick.

Mark.


"Peter Dassow" wrote in message news:4ebe9685$0$6642$***@newsspool2.arcor-online.net...

Hi,

after several unsuccessful tries, I am clueless.
My Mega STE worked flawlessly with his ST157N, but it's one of the
smallest HD you can find (no more space now for anything).
So I tried it with a IBM DORS 32160 (SCA version, but I used an adapter
to SCSI-50pin). I didn't hear even the HD drive/motor (may be this drive
was already dead).
Now I buyed a IBM 0662 drive (1.0 GB SCSI, 50pin).
Because this beast have the maximum of jumper for configuration you can
imagine, I made an excerpt from the manual and upload it to my site.
You can take a look at it here: http://www.z80.eu/images/ibm0662.png
The red jumpers are my assumption what is necessary.
For the Mega STE, some told me, I should NOT use "active termination".
For classic ST's, this would be different (e.g. for MegaFile's).
At the moment, it does not work, HDDriver (or CBHD or AHDI 6) does not
recognize any drive except my also external connected Syquest 555 drive.

I am not aware of the sense of "Disable UNIT attention" here, also of
the jumper "Disable T.I.Sync Negotiations".
Also, I am not sure about "SCSI bus termination power" and the
additional "Termination Power enable" jumper (which should be related
with the "Enable Active Termination" jumper.

Any help (Mega STE specific) ?

Regards
Peter