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

[Al Kossow]

> 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 the driver to tell it the drive parameters

just get a gesswein mfm emulator already..
this is a trivial data recovery job for it