weird things with HP SuresStore DAT tape

Jari Soderholm (kernel@cdlinux01.ntc.nokia.com)
Tue, 18 Feb 1997 12:07:44 +0200 (EET)


I connected HP SureStore DAT tape 6000 to our
Linux 2.0.29 machine and did some testing with and found
out that it did work only a short time.

I started copying a gigabyte of data with command
"tar cvf /dev/st0 *"

it copied about 100-300 Megabytes of stuff, then suddenly
Xterm - where I had tar-command running disappeared
completely and process disappeared.

After that I used mt-command "mt rewind" and "mt erase"
Running "mt erase" for some 30 minutes, I tried to kill
it but wasn't able to do that, kill -9 did not kill "mt erase"
process.

I have 200 Mhz Pentium PRO

and other info is here from proc-filesystem

<4>Calibrating delay loop.. ok - 198.66 BogoMIPS
<4>Memory: 257100k/262144k available (752k kernel code, 384k reserved,
3908k data)
<6>Swansea University Computer Society NET3.035 for Linux 2.0
<6>NET3: Unix domain sockets 0.13 for Linux NET3.035.
<4>Swansea University Computer Society TCP/IP for NET3.034
<4>IP Protocols: ICMP, UDP, TCP
<4>Checking 386/387 coupling.... Ok, fpu using exception 16 error
reporting.
<4>Checking 'hlt' instruction... Ok.
<4>Linux version 2.0.29 (root@cdlinux01) (gcc version 2.7.2.1) #4 Sat Feb
15 21:59:00 EET 1997
<6>Serial driver version 4.13 with no serial options enabled
<6>tty00 at 0x03f8 (irq = 4) is a 16550A
<6>tty01 at 0x02f8 (irq = 3) is a 16550A
<6>PS/2 auxiliary pointing device detected -- driver installed.
<4>Ramdisk driver initialized : 16 ramdisks of 4096K size
<6>Floppy drive(s): fd0 is 1.44M
<6>FDC 0 is a National Semiconductor PC87306
<4>Started kswapd v 1.4.2.2
<4>ncr53c8xx : at PCI bus 0, device 1, function 0
<4>ncr_attach: unit=0 chip=810 base=fdffbc00, io_port=ec00, irq=11
<4>ncr53c810-0: using memory mapped IO at virtual address 0x10841c00
<4>ncr53c810-0: assuming 40MHz clock
<4>ncr53c810-0: initial value of SCNTL3 = 03, final = 13
<4>ncr53c810-0: requesting shared irq 11 (dev_id=0x10068)
<4>ncr53c810-0: restart (scsi reset).
<4>scsi0 : ncr53c8xx (rel 1.12d)
<4>scsi : 1 host.
<4>ncr53c810-0-<target 0, lun 0>: using tagged command queueing, up to 4
cmds/lun
<4> Vendor: HP Model: C2490A-300 Rev: 4140
<4> Type: Direct-Access ANSI SCSI revision: 02
<4>Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
<4>ncr53c810-0-<target 1, lun 0>: using tagged command queueing, up to 4
cmds/lun
<4> Vendor: HP Model: C3725S Rev: 4299
<4> Type: Direct-Access ANSI SCSI revision: 02
<4>Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0
<4>ncr53c810-0-<target 2, lun 0>: 200ns (5 Mb/sec) offset 8.
<4>ncr53c810-0-<target 2, lun 0>: using tagged command queueing, up to 4
cmds/lun
<4> Vendor: COMPAQ Model: ST32550N Rev: 6316
<4> Type: Direct-Access ANSI SCSI revision: 02
<4>Detected scsi disk sdc at scsi0, channel 0, id 2, lun 0
<4> Vendor: HP Model: C1533A Rev: 9608
<4> Type: Sequential-Access ANSI SCSI revision: 02
<6>Detected scsi tape st0 at scsi0, channel 0, id 4, lun 0
<4> Vendor: TOSHIBA Model: CD-ROM XM-5401TA Rev: 3605
<4> Type: CD-ROM ANSI SCSI revision: 02
<4>Detected scsi CD-ROM sr0 at scsi0, channel 0, id 5, lun 0
<4>scsi : detected 1 SCSI tape 1 SCSI cdrom 3 SCSI disks total.
<4>ncr53c810-0-<target 0, lun 0>: FAST SCSI-2 100ns (10 Mb/sec) offset 8.
<4>SCSI device sda: hdwr sector= 512 bytes. Sectors= 4165272 [2033 MB]
[2.0 GB]
<4>ncr53c810-0-<target 1, lun 0>: FAST SCSI-2 100ns (10 Mb/sec) offset 8.
<4>SCSI device sdb: hdwr sector= 512 bytes. Sectors= 4238836 [2069 MB]
[2.1 GB]
<4>ncr53c810-0-<target 2, lun 0>: FAST SCSI-2 100ns (10 Mb/sec) offset 8.
<4>SCSI device sdc: hdwr sector= 512 bytes. Sectors= 4110000 [2006 MB]
[2.0 GB]
<6>PPP: version 2.2.0 (dynamic channel allocation)
<6>TCP compression code copyright 1989 Regents of the University of
California
<6>PPP Dynamic channel allocation code copyright 1995 Caldera, Inc.
<6>PPP line discipline registered.
<4>NET3 PLIP version 2.2 gniibe@mri.co.jp
<4>plip1: Parallel port at 0x378, using assigned IRQ 7.
<4>eth0: DE450-CA at 0xe880 (PCI bus 0, device 8), h/w address
00:00:f8:30:c9:7f,
<4> and requires IRQ9 (provided by PCI BIOS).
<4>Partition check:
<4> sda: sda1
<4> sdb: sdb1
<4> sdc: sdc1
<4>VFS: Mounted root (ext2 filesystem) readonly.
<4>eth0: media is BNC.
<4>ncr53c810-0-<target 4, lun 0>: FAST SCSI-2 100ns (10 Mb/sec) offset 8.

Jari