brant@manta.pha.pa.us (Brant Cheikes) (12/07/88)
Sigh. Intermittent HDERRs continue to appear in my unix.log. I checked the power supply as Thad Floryan suggested; you couldn't ask for more accurate voltage output. A sample log entry: HDERR ST:51 EF:10 CL:FFA1 CH:FF00 SN:FF0C SC:FF02 SDH:FF24 DMACNT:FFFF DCRREG:94 MCRREG:D300 Tue Dec 6 03:20:14 1988 I even found: HD:Spurious interrupt Tue Dec 6 10:56:05 1988 Would some kind soul with access to the HD controller specs please post the meaning of all bits in these registers: ST, EF, SC, DCRREG, MCRREG. I understand CL = cylinder low, CH = cylinder high, SN = sector, SDH = head. If anyone has an informed opinion on whether it's the disk or the controller (or ?) at fault here, I'd appreciate very much to hear it. -- Brant Cheikes University of Pennsylvania Department of Computer and Information Science brant@manta.pha.pa.us, brant@linc.cis.upenn.edu, bpa!manta!brant