Re: 2.4.19: sym53c8xx problems

From: Mr. James W. Laferriere (babydr@baby-dragons.com)
Date: Sun Oct 06 2002 - 23:22:34 EST


        Hello Eyal ,

On Sun, 6 Oct 2002, Eyal Lebedinsky wrote:
> "Mr. James W. Laferriere" wrote:
> > Is your scsi setup easy enough to make an ascii art description
> > of ? If so would you post it please ? From the messages below
> > it appears (to me) that their is some difficulty in the chain that
> > attaches to the python . I have never seen those messages when I
> > have attached (albeit differant) tape drives , ie: DLT,dat2,dat3 .
> As I mentioned the ONLY scsi device is the externally connected DDS-1
> tape drive. It is a SCSI-2 narrow (50-pin) device. It uses a
> HD-centronics->50pin-centronics cable.
        I have been reviewing your previous message to the list . In it
        you mentioned putting a Asus sc200(53c810) card into this system .
        Was that card in the system when the dmesg output was taken ?
        IF it was then that dmesg output shows a bug in the controller
        card recognition routines . A 53c810 isn't a 53c875 .
        Also iirc the 6000 has either a 53c876 or two 53c875's on board
        not three . At least mine only reports 2 53c875's .

        Another source of information for the sym driver is
        /usr/src/linux/drivers/scsi/sym53c8xx_2/Documentation.txt

> I believe the BIOS on this machine really does not like and IDE disks
> connected. It does have an IDE controller but will only allow the CD
> drive on it, so we have a PCI/IDE controller installed to handle the
> single IDE disk. The machine refuses to boot off the IDE but LILO is
> happy to do so off a floppy.
        Iirc the bios is stunted to only allow boot to cdrom on the ide
        port . So the limitation probably continues onto other ide
        controllers as well .

> BTW, I only have this machine in order to test out software on a 4-way
> SMP machine, which is why we passed on installing more expensive scsi
> disks.
>
> Now, when I connect the cable to my tape, lilo fails to boot off the
> floppy. It seems that the first BIOS disk (80h) which is detected
> properly by the IDE controller is trashed by the scsi controller
> (which initialises later than the IDE). So we now boot off the floppy
> directly (i.e. the kernel boots off the floppy, not just lilo).
>
> Finally, now that we are booting just fine, and the scsi tape drive
> is clearly detected at bootup by the kernel, I see that the scsi
> driver does not stay loaded (maybe the boot process loads it, and
> if there are no disks it unloads it?). So I try to load it myself
> modprobe sym53c8xx
> and this kills the machine.
>
> By "kills" I mean the machine stutters for a few seconds, and then
> locks up, not even vt switching. No message is ever displayed.

       +------------------------------------------------------------------+
       | James W. Laferriere | System Techniques | Give me VMS |
       | Network Engineer | P.O. Box 854 | Give me Linux |
       | babydr@baby-dragons.com | Coudersport PA 16915 | only on AXP |
       +------------------------------------------------------------------+

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This archive was generated by hypermail 2b29 : Mon Oct 07 2002 - 22:00:57 EST