Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-26 Thread Jules Richardson via cctech
On 9/26/20 10:32 AM, Michael Engel via cctech wrote: Using DOS might be another option, I seem to hit a roadblock with every Unix version I try... hmm, have a look here: http://ftp.vim.org/ftp/pub/ibiblio/kernel/patches/scsi ... adaptec-40XX-1.02.tar.gz looks like it might do the trick. Use

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-26 Thread Jules Richardson via cctech
On 9/26/20 10:56 AM, Al Kossow via cctech wrote: ACB4000s aren't common command set. it expects the driver to tell it the drive parameters I'm possibly/probably wrong, but I thought the ACB-4000 only needs the parameters setting prior to format - I don't know it it has some form of non

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-26 Thread Al Kossow via cctech
On 9/26/20 8:56 AM, Al Kossow via cctech wrote: sd3: non-CCS device found at target 0 lun 0 on esp0 sd3: at esp0 target 0 lun 0 sd3: corrupt label - wrong magic number sd3: Vendor ´ADAPTEC*´, product ´ACB4000*´, 181520 512 byte blocks ACB4000s aren't common command set. it expects

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-26 Thread Michael Engel via cctech
On 9/26/20 5:22 AM, Grant Taylor via cctalk wrote: On 9/25/20 10:38 AM, Glen Slick via cctalk wrote: If the Adaptec 2940 BIOS seems to detect the disk I wonder what would happen if DOS was set up on the system and ASPI8DOS.SYS was loaded. Would the Adaptec 2940 and ASPI driver respect the

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-25 Thread Glen Slick via cctech
On Wed, Sep 23, 2020 at 11:51 AM Michael Engel via cctech wrote: > > Hi, > > still working on backing up the Tektronix 440x disks. My current problem > is that the ACB4000 SCSI-to-MFM adapter doesn´t support SCSI parity. > > I finally managed to find a PCI SCSI controller (Adaptec 2940) and a >

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-24 Thread Grant Taylor via cctech
On 9/24/20 12:15 PM, Jules Richardson via cctech wrote: the Linux kernel at least has depended on it for a very long time Do you have any idea how far back one might need to go to get a kernel that didn't depend on SCSI Inquiry? I wonder if a retro computer with a really old kernel and a

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-24 Thread Jules Richardson via cctech
On 9/23/20 3:28 PM, Michael Engel via cctech wrote: It seems that the problem lies in the firmware of the ACB4000, which doesn´t seem to support some standard commands, e.g. the INQUIRY command. Most recent Linux SCSI drivers seem to use this command. Lack of Inquiry support seems to be quite

Disabling SCSI parity checking to dump disk on ACB4000, MFM-SCSI adapter?

2020-09-24 Thread Chris Quayle via cctech
On 09/24/20 18:00, cctech-requ...@classiccmp.org wrote: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter? I have a sun 3 system with acb4000 and suspect the protocol was not fully sorted in that time frame. They can be fussy about what they will talk to, ime

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-24 Thread Camiel Vanderhoeven via cctech
> On Sep 23, 2020, at 10:28 PM, Michael Engel via cctech > wrote: > > > > On 9/23/20 8:54 PM, Grant Taylor via cctech wrote: >> On 9/23/20 12:51 PM, Michael Engel via cctech wrote: >>> Do you know if is there another OS which would make it easier to change >>> crucial SCSI parameters in

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-23 Thread Plamen Mihaylov via cctech
I have the same problem with Torch Triple X disk which uses OMT SCSI/MFM adapter. I believe the best solution is to use David’s MFM emulator board. Best regards, Plamen On Wednesday, September 23, 2020, Michael Engel via cctech < cctech@classiccmp.org> wrote: > > > On 9/23/20 8:54 PM, Grant

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-23 Thread Josh Dersch via cctech
On Wed, Sep 23, 2020 at 1:28 PM Michael Engel via cctech < cctech@classiccmp.org> wrote: > > > On 9/23/20 8:54 PM, Grant Taylor via cctech wrote: > > On 9/23/20 12:51 PM, Michael Engel via cctech wrote: > >> Do you know if is there another OS which would make it easier to > >> change crucial SCSI

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-23 Thread Michael Engel via cctech
On 9/23/20 8:54 PM, Grant Taylor via cctech wrote: On 9/23/20 12:51 PM, Michael Engel via cctech wrote: Do you know if is there another OS which would make it easier to change crucial SCSI parameters in the driver (config) or maybe a specialized tool that could help me to image the disk?

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-23 Thread Grant Taylor via cctech
On 9/23/20 12:51 PM, Michael Engel via cctech wrote: Do you know if is there another OS which would make it easier to change crucial SCSI parameters in the driver (config) or maybe a specialized tool that could help me to image the disk? Try booting off of a Linux live CD / DVD and seeing if

Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

2020-09-23 Thread Michael Engel via cctech
Hi, still working on backing up the Tektronix 440x disks. My current problem is that the ACB4000 SCSI-to-MFM adapter doesn´t support SCSI parity. I finally managed to find a PCI SCSI controller (Adaptec 2940) and a Pentium 4 PC with PCI slots and installed OpenBSD 6.7. I disabled parity