Path: utzoo!attcan!uunet!ncrlnk!ncr-sd!hp-sdd!hplabs!hpda!hpcuhb!hpcilzb!hpcea!hpausla!jcl From: jcl@hpausla.HP.COM (Jeff Laing) Newsgroups: comp.sys.mac Subject: Re: SCSI-dispatch problem Message-ID: <2530003@hpausla.HP.COM> Date: 20 Dec 88 22:07:45 GMT References: Organization: HP Australian Software Operation Lines: 25 Pete Keleher (pete@titan.titan.rice.edu) writes in comp.sys.mac: > My problem is that every so often, my mac gets hung. By using TMON, > I can see that it seems to be looping in some code labeled scsi_dispatch. Now that you mention it, yeh. I do have the same problem 'from time to time' Loops in the same place every time (waiting for a bit to get set in scsi_disp) Running disk tests claim that the disk media is ok > The reason that I am having this problem is probably because I am > running system 6.0 on an ORIGINAL mac. The ~1984 mac does has been I'm not. I'm still on 4.3 (I don't trust these fancy new systems yet) on a Mac+ with 2.5 meg. > have bad hardware? Failing an answer for that, has anyone else noted a > similar problem? I had put it down to the fact that I am running a no-name drive (constructed by one of the local computer store hardware hackers, probably from a Seagate) I have already had to make one change to the driver he wrote (he managed to have a word being accessed at an odd address). My guess was that the drive does not really support blind read/writes properly, and its getting behind just long enough to hang... Anyone got any ideas?