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Date:      Tue, 22 Aug 2000 16:30:04 -0700 (PDT)
From:      Matthew Jacob <mjacob@feral.com>
To:        freebsd-bugs@FreeBSD.org
Subject:   Re: i386/20790: Upgrade to V4.1 "kills" SCSI tape (rst0->rsa0)
Message-ID:  <200008222330.QAA84196@freefall.freebsd.org>

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The following reply was made to PR i386/20790; it has been noted by GNATS.

From: Matthew Jacob <mjacob@feral.com>
To: jimd@dutton3.it.siu.edu
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: i386/20790: Upgrade to V4.1 "kills" SCSI tape (rst0->rsa0)
Date: Tue, 22 Aug 2000 16:19:59 -0700 (PDT)

 Do you actually have a tape loaded in the drive when you issue the 'mt stat'
 command? If so, it may be the code that tries to sense what media is there-
 this can break for some drives. Try building a CAMDEBUG kernel, reboot, do
 camcontrol debug -Ic 0:4:0 and then do the 'mt' test with a tape inserted and
 send me the results, thank you.
 
 
 > 
 > >Number:         20790
 > >Category:       i386
 > >Synopsis:       SCSI tape drive no longer works
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       high
 > >Responsible:    freebsd-bugs
 > >State:          open
 > >Quarter:        
 > >Keywords:       
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Tue Aug 22 16:10:00 PDT 2000
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Jim Dutton
 > >Release:        FreeBSD 4.1-RELEASE i386
 > >Organization:
 > Southern Illinois University
 > >Environment:
 > 
 > FreeBSD 4.1-RELEASE #2: Tue Aug 22 00:52:51 CDT 2000
 > jimd@dutton3.it.siu.edu:/usr/src/sys/compile/XSYSDELL41
 > Calibrating clock(s) ... TSC clock: 398768762 Hz, i8254 clock: 1193166 Hz
 > CLK_USE_I8254_CALIBRATION not specified - using default frequency
 > Timecounter "i8254"  frequency 1193182 Hz
 > CLK_USE_TSC_CALIBRATION not specified - using old calibration method
 > CPU: Pentium II/Pentium II Xeon/Celeron (398.78-MHz 686-class CPU)
 > Origin = "GenuineIntel"  Id = 0x651  Stepping = 1
 > Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,
 >                    CMOV,PAT,PSE36,MMX,FXSR>
 > real memory  = 134217728 (131072K bytes)
 > 
 > 
 > pci2: <PCI bus> on pcib2
 > ahc0: <Adaptec aic7850 SCSI adapter> port 0xdc00-0xdcff
 >       mem 0xfafff000-0xfaffffff irq 10 at device 11.0 on pci2
 > ahc0: No SEEPROM available.
 > ahc0: aic7850 Single Channel A, SCSI Id=7, 3/255 SCBs
 > ahc0: Host Adapter Bios disabled.  Using default SCSI device parameters
 > ahc0: Downloading Sequencer Program... 411 instructions downloaded
 > xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xcc00-0xcc7f
 >      mem 0xff000000-0xff00007f irq 11 at device 17.0 on pci0
 > 
 > Waiting 15 seconds for SCSI devices to settle
 > (noperiph:ahc0:0:-1:-1): SCSI bus reset delivered. 0 SCBs aborted.
 > ahc0: target 4 synchronous at 5.0MHz, offset = 0xf
 > sa0 at ahc0 bus 0 target 4 lun 0
 > sa0: <CONNER CTMS  3200 7.10> Removable Sequential Access SCSI-2 device 
 > sa0: Serial Number  offset 15)
 > pass0 at ahc0 bus 0 target 4 lun 0
 > pass0: <CONNER CTMS  3200 7.10> Removable Sequential Access SCSI-2 device 
 > pass0: Serial Number 
 > pass0: 5.000MB/s transfers (5.000MHz, offset 15)
 > 
 > >Description:
 > 
 > Most of the *sa0* tape devices respond to "not configured" when used with
 > the MT command. Any device that does not result in this message, hangs up.
 > The tape drive read light is on solid, but the drive motor is not running,
 > as far as I can tell. The MT command process is locked and can not be KILLed.
 > None of the *pass0* devices are "configured".
 > 
 > This same system and hardware worked under the previous V3.2 installation of
 > FreeBSD. The specific SCSI controller is an Adaptec 2902. While the
 > environment report above shows a modified kernel, this problem started after
 > the 4.1 upgrade, "out of the box".
 > 
 > >How-To-Repeat:
 > 
 > Turn on tape drive, install tape, execute MT command with one of the *sa0*
 > tape devices.
 > 
 > >Fix:
 > 
 > Reboot machine, turn off and do not use tape drive.
 > 
 > >Release-Note:
 > >Audit-Trail:
 > >Unformatted:
 > 
 > 
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 > with "unsubscribe freebsd-bugs" in the body of the message
 > 
 
 


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