Messages in this thread |  | | Date | Tue, 14 Jan 1997 13:52:00 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: aic7xxx and tapse (Was Re: How to force a kernel panic ?) |
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On 14 Jan 1997, John Henders wrote:
> In <Pine.LNX.3.91.970113081047.1639A-100000@chaos.analogic.com> "Richard B. Johnson" <root@analogic.com> writes: > > >If I execute: > > ># ls -R /mnt > > >With /mnt containing a MS-DOS file system. The result can't be saved because > >of the panic that results. Basically, there are a bunch of "Queue full" > >messages, followed by timeout messages, followed by SCSI reset then aborting > >the SCSI command messages, followed by 'aiee freeing interrupt', going > >down hill from there. > [...] > >The basic reason for the crash is that the SCSI device is being asked > >to read beyond the physical end of the media. I verified this by hacking > >the code. A sector-number of 0xA0001AFF starts this off with my MS-DOS > >file-system. The media only contains 4406960 512 byte sectors, i.e., > >0x433EB0. I think there is a signed/unsigned problem somewhere in > >the code........ > > This is very odd. I have a 1 gig dos (vfat) partition on my 2 gig scsi > drive and I can do the above test without a problem. I wonder if the > problem is with the aic driver or the msdos file system code. > > As to the scsi tape problem, have you tried lowering the bus negotiation > speed on the card for the exabyte. As someone else noted, there's no > problem with Archive DAT's at all. I use one regularly on my 2940.
The kernel messages say "Synchronous at 4 MHz" for the CD-ROM, 10 MHz for the disks, and "Refusing synchronous negotiation" for the tape. This is correct. Async transfer is done at whatever speed (non setable) the controller/bus/device allows (the handshake controls the speed).
The MS-DOS file-system does not crash if I mount a 330 megabyte partition. I think the problem starts at 524,288 * 1024 bytes (hint, hint).
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