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SubjectRE: SCSI tape driver suddenly malfunction
I hate to ask this but have you tried a different tape??? 
Perhaps your tape is bad??

Gerry


On 14-Jan-99 Xun Cheng wrote:
> Help is desperately needed to make my
> backup system back. Sorry for mutiple list posting.
>
> My scsi tape driver suddenly doesn't work.
> It's about 2 months since last proper backup.
> I really can't recall what change made it since
> too many updates happened since then. I issued
> the command tar cvf /dev/st0 /home
> After backing up some files, at a fixed point (backing
> up the file home/PREDATOR/code/bin/xxx which is
> about 14 Mbyte large), error would happen. Following
> is the error from system log:
> =============
> Jan 14 02:37:34 localhost kernel: st0: Error with sense data:
> extra data
> not valid Current error st09:00: sense key Medium Error
> Jan 14 02:37:34 localhost kernel: Additional sense indicates
> Excessive
> write errors
> Jan 14 02:37:34 localhost kernel: st0: Error with sense data:
> extra data
> not valid Current error st09:00: sense key Medium Error
> Jan 14 02:37:34 localhost kernel: Additional sense indicates
> Excessive
> write errors
> Jan 14 02:37:34 localhost kernel: st0: Error on write
> filemark.
> =================
> I'm not sure which info are needed for your help so
> I include the dmesg message in the following:
> ===================
> Linux version 2.2.0-pre5 (root@phoenux) (gcc version
> egcs-2.90.29 980515
> (egcs-1.0.3 release)) #2 Thu Jan 14 00:50:48 /etc/localtime
> 1999
> Detected 199436396 Hz processor.
> Console: colour VGA+ 80x25
> Calibrating delay loop... 199.07 BogoMIPS
> Memory: 257268k/262144k available (1064k kernel code, 408k
> reserved,
> 3328k data, 76k init)
> CPU: Intel Pentium Pro stepping 07
> Checking 386/387 coupling... OK, FPU using exception 16 error
> reporting.
> Checking 'hlt' instruction... OK.
> POSIX conformance testing by UNIFIX
> mtrr: v1.26 (19981001) Richard Gooch (rgooch@atnf.csiro.au)
> PCI: PCI BIOS revision 2.10 entry at 0xfd6b1
> PCI: Using configuration type 1
> PCI: Probing PCI hardware
> PCI: 00:00 [8086/1237]: Passive release enable (00)
> Linux NET4.0 for Linux 2.2
> Based upon Swansea University Computer Society NET3.039
> NET4: Unix domain sockets 1.0 for Linux NET4.0.
> NET4: Linux TCP/IP 1.0 for NET4.0
> IP Protocols: ICMP, UDP, TCP
> Initializing RT netlink socket
> Starting kswapd v 1.5
> parport0: PC-style at 0x378 [SPP]
> parport0: Printer, HEWLETT-PACKARD DESKJET 680C
> Serial driver version 4.27 with no serial options enabled
> ttyS00 at 0x03f8 (irq = 4) is a 16550A
> lp0: using parport0 (polling).
> Real Time Clock Driver v1.09
> Non-volatile memory driver v1.0
> RAM disk driver initialized: 16 RAM disks of 4096K size
> loop: registered device at major 7
> PIIX3: IDE controller on PCI bus 00 dev 39
> PIIX3: not 100% native mode: will probe irqs later
> ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:pio,
> hdb:pio
> ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio,
> hdd:pio
> hda: QUANTUM FIREBALL_TM3840A, ATA DISK drive
> hdc: FX120T, ATAPI CDROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: QUANTUM FIREBALL_TM3840A, 3681MB w/76kB Cache,
> CHS=935/128/63
> hdc: ATAPI 12X CDROM drive, 256kB Cache
> Uniform CDROM driver Revision: 2.51
> Floppy drive(s): fd0 is 1.44M
> FDC 0 is a National Semiconductor PC87306
> scsi0 : AdvanSys SCSI 3.1E: PCI Ultra 16 CDB: IO FF00/F, IRQ
> 10
> scsi : 1 host.
> Vendor: ARCHIVE Model: Python 28849-XXX Rev: 4.CM
> Type: Sequential-Access ANSI SCSI
> revision: 02
> Detected scsi tape st0 at scsi0, channel 0, id 0, lun 0
> Vendor: SEAGATE Model: ST19171N Rev: 0024
> Type: Direct-Access ANSI SCSI
> revision: 02
> Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
> scsi : detected 1 SCSI tape 1 SCSI disk total.
> SCSI device sda: hdwr sector= 512 bytes. Sectors= 17783112
> [8683 MB]
> [8.7 GB]
> PPP: version 2.3.3 (demand dialling)
> TCP compression code copyright 1989 Regents of the University
> of
> California
> PPP line discipline registered.
> Partition check:
> sda: sda1 sda2 sda3
> hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 hda8 >
> VFS: Mounted root (ext2 filesystem) readonly.
> Freeing unused kernel memory: 76k freed
> Adding Swap: 104828k swap-space (priority -1)
> =====================
> BTW, my scsi hard disk works perfect.
>
> mt -f /dev/st0 status shows:
> ==================
> SCSI 2 tape drive:
> File number=0, block number=0, partition=0.
> Tape block size 0 bytes. Density code 0x24 (DDS-2).
> Soft error count since last status=0
> General status bits on (41010000):
> BOT ONLINE IM_REP_EN
> ====================
> and mtx -f /dev/st0 status shows (if you know what mtx is):
> =================
> Data Transfer Element: Full (Storage Element 1 Loaded)
> Storage Element 1: Empty
> Storage Element 2: Full
> Storage Element 3: Full
> Storage Element 4: Full
> ===============
>
> Any help is grateful and even some suggestion would be
> good. I really don't know what to try to find the reason.
> Please CC to me directly when you reply.
>
> thanks a lot
> xun
>
>
> --
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----------------------------------
E-Mail: Gerry Doris <gdoris@shaw.wave.ca>
Date: 14-Jan-99
Time: 16:16:44

"The lyf so short, the craft so long to learne" Chaucer
----------------------------------

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