Hi, I remember I used Linux with an AdvanSys PCI adapter to successfully read a disk connected through an ACB4000. It's been a while but I believe I had to run an old kernel which I compiled myself with support for ACB4000. Might have been that a patch was applied.
All I found in my archives is a copy of the dmesg from the host showing: Linux version 2.0.38 (root@localhost.localdomain) (gcc version 2.7.2.3) #2 Wed Nov 11 20:33:21 CET 2009 [...] scsi0 : AdvanSys SCSI 3.1E: PCI Ultra 16 CDB: IO D400/F, IRQ 12 scsi : 1 host. scsi0 channel 0 : resetting for second half of retries. SCSI bus is being reset for host 0 channel 0. advansys: advansys_reset: reset request not active or waiting, completing anyway fbd018 Vendor: ADAPTEC Model: ACB-40XX Rev: 1.00 Type: Direct-Access ANSI SCSI revision: 01 Detected scsi disk sda at scsi0, channel 0, id 0, lun 0 SCSI device sda: hdwr sector= 512 bytes. Sectors= 148135 [72 MB] [0.1 GB] sda: unknown partition table Can try to dig around old disks some day to see if I find the patch. Br, Jonas On Wed, Sep 23, 2020 at 08:51:39PM +0200, Michael Engel via cctalk 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 Pentium > 4 PC with PCI slots and installed OpenBSD 6.7. I disabled parity checking in > the Adaptec BIOS config and it detects a disk at ID 0 with no name. So far, > so good. > > However, OpenBSD always seems to enable SCSI parity and complains about disk > parity errors. I tried to disable all lines in the aic7xxx and ahc_pci > driver source files that seem to enable parity, but nothing seems to make a > difference. The drive/ACB4000 is not detected by OpenBSD, I get a "device > not configured" error when accessing the disk device files (/dev/sdxc and > /dev/rsdxc). > > 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? > > -- Michael
