01-13-2004
ok, so i had the guy in my team who is onsite at the data center pop in a new tape
Per your request I tried popping in other tape.
Here is what I got:
When I tried putting in other tape I got "clean drive" msg.
So I cleaned drive.
Put back in orig tape thinking that's all it was.
Tried to do simple copy and got "Cannot write to Device:"
So went back up and tried other tape .. got "clean drive" msg again
Cleaned drive again.
Put in other tape.
Tried doing simple copy and got same msg .. ie Cannot write .. etc
Ran cmd below and figured drive ok .. but not sure ..
You guys have any ideas/suggestions?
thx
# tctl -f /dev/rmt0 status
rmt0 Available 40-60-00-0,0 SCSI 8mm Tape Drive
attribute value description user_settable
mode yes Use DEVICE BUFFERS during writes True
block_size 1024 BLOCK size (0=variable length) True
extfm no Use EXTENDED file marks True
ret no RETENSION on tape change or reset True
density_set_1 39 DENSITY setting #1 True
density_set_2 39 DENSITY setting #2 True
compress yes Use data COMPRESSION True
size_in_mb 20000 Size in Megabytes False
ret_error no RETURN error on tape change or reset True
#
Our only other theory is maybe the density of the tape is incorect? any other ideas?
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tz(4) Kernel Interfaces Manual tz(4)
Name
tz - SCSI magnetic tape interface
Syntax
VAX NCR 5380:
adapter uba0 at nexus?
controller scsi0 at uba0 csr 0x200c0080 vector szintr
tape tz0 at scsi0 drive 0
VAX DEC SII:
adapter ibus0 at nexus?
controller sii0 at ibus? vector sii_intr
tape tz0 at sii0 drive 0
RISC DEC SII:
adapter ibus0 at nexus?
controller sii0 at ibus? vector sii_intr
tape tz0 at sii0 drive 0
RISC DEC KZQ:
adapter uba0 at nexus?
controller kzq0 at ibus? csr 0761300vector sii_intr
tape tz0 at kzq0 drive 0
RISC NCR ASC:
adapter ibus0 at nexus?
controller asc0 at ibus? vector ascintr
tape tz0 at asc0 drive 0
Description
The SCSI tape driver provides a standard tape drive interface as described in This is a driver for any Digital SCSI tape device.
For the TZK10 QIC format tape drive, the densities supported are QIC-24 (read only) block size of 512 byte blocks, QIC-120, and QIC-150
read/write block size of 512 byte blocks, and QIC-320 read/write block size of 1024 byte blocks. With QIC format style tapes all reads and
writes must be in multiple of the block size. This is a requirement of fixed block tape drives because record boundaries are not pre-
served. The QIC densities are selected using the following special device names:
QIC-24 Fixed block size.
QIC-120 Fixed block size.
QIC-150 Fixed block size.
QIC-320 Fixed block size.
With all fixed block tape devices a of a file to the tape must be padded out. An example of this is a of which has a size of approximately
3800 bytes.
dd if=/etc/gettytab of=/dev/rmt0h bs=10k conv=sync
or
dd if=/etc/gettytab of=/dev/rmt0l bs=512 conv=sync
The option of pads the output to block size.
This driver also supports n-buffered reads and writes to the raw tape interface (used with streaming tape drives). See for further
details.
Tape Support
TZ30, TZK50, TLZ04, TSZ05, TKZ08, TZK10
Diagnostics
All diagnostic messages are sent to the error logger subsystem.
Files
See Also
mtio(4), nbuf(4), SCSI(4), MAKEDEV(8), uerf(8), tapex(8)
Guide to the Error Logger
tz(4)