Re: LS120, ATANg and Atapicam
On Sun, 7 Sep 2003, Mark Dixon wrote: I'm not sure if this is a known problem, but I don't see any references to it. I've gone from 5.1-RELEASE to todays CURRENT to try to get rid of a different panic (no news on that yet), but I have hit this one. If I boot my system with no floppy in the LS-120, the system panics where atapicam creates da0 for it. If there is a disk in the drive, it works fine. As yet, I havn't got the details of the panic, but if this is of interest to anyone here, I will be willing to provide them with them (they wil have to be be copied out by hand, so I'm lothe to do it if nobody is interested). I see similar bugs for a 1 ZIP drive 2 CDROM drives. The panic is mostly for division by 0 in cam_calc_geometry(), but sometimes there is division by a garbage value and the error is detected before it causes a panic. Debugging one of the CDROM drives shows that all SCSI commands done as part of cdopen() succeed although there is no disk in the drive! Most of the commands are reads and the reads are apparently null, leaving garbage in the buffers. In particular, the disk geometry is garbage and dividing by a garbage sector size of 0 causes the panic. The SCSI commands get at least as far as ata_completed() (via ata_command() and ata_interrupt() so they apparently get sent to the drive, but no errors are detected. For ATAPI drives, there are no problems unless the drives are explicitly accessed since GEOM doesn't probe them unconditonally. Panics for the ZIP drive are deterministic here since GEOM accesses it unconditionally at boot time when the garbage is more likely to be 0. Bruce ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to [EMAIL PROTECTED]
LS120, ATANg and Atapicam
Mark == Mark Dixon [EMAIL PROTECTED] writes: Mark Hi, I'm not sure if this is a known problem, but I don't see any Mark references to it. I've gone from 5.1-RELEASE to todays CURRENT Mark to try to get rid of a different panic (no news on that yet), Mark but I have hit this one. Mark If I boot my system with no floppy in the LS-120, the system Mark panics where atapicam creates da0 for it. If there is a disk in Mark the drive, it works fine. Mark As yet, I havn't got the details of the panic, but if this is of Mark interest to anyone here, I will be willing to provide them with Mark them (they wil have to be be copied out by hand, so I'm lothe to Mark do it if nobody is interested). Mark Sorry if this email is a little vague, its been a long week. I'm just about to try to reproduce a panic along the same lines. My laptop has two ide channels with the hard drive on one and the DVD+R drive on the other. With yesterday's cvsup, it somehow finds a phantom ad3 _only_ if the DVD+R is in it's bay. With the DVD+R removed, the system is still functional (luckily). More info to follow as I get a kernel with debugging symbols in it. Dave. -- |David Gilbert, Independent Contractor. | Two things can only be | |Mail: [EMAIL PROTECTED]| equal if and only if they | |http://daveg.ca | are precisely opposite. | =GLO ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: LS120, ATANg and Atapicam
On Sun, Sep 07, 2003 at 12:18:56AM +, Mark Dixon wrote: Hi, I'm not sure if this is a known problem, but I don't see any references to it. I've gone from 5.1-RELEASE to todays CURRENT to try to get rid of a different panic (no news on that yet), but I have hit this one. If I boot my system with no floppy in the LS-120, the system panics where atapicam creates da0 for it. If there is a disk in the drive, it works fine. As yet, I havn't got the details of the panic, but if this is of interest to anyone here, I will be willing to provide them with them (they wil have to be be copied out by hand, so I'm lothe to do it if nobody is interested). Sorry if this email is a little vague, its been a long week. Just want to add a me too here. I have what looks like the same problem with an atapi zip drive. I can set up a serial cable and try to get a backtrace if that would help. -jre ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to [EMAIL PROTECTED]
LS120, ATANg and Atapicam
Hi, I'm not sure if this is a known problem, but I don't see any references to it. I've gone from 5.1-RELEASE to todays CURRENT to try to get rid of a different panic (no news on that yet), but I have hit this one. If I boot my system with no floppy in the LS-120, the system panics where atapicam creates da0 for it. If there is a disk in the drive, it works fine. As yet, I havn't got the details of the panic, but if this is of interest to anyone here, I will be willing to provide them with them (they wil have to be be copied out by hand, so I'm lothe to do it if nobody is interested). Sorry if this email is a little vague, its been a long week. Mark ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to [EMAIL PROTECTED]
