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Full Discussion: Get files from sdlt tapes
Top Forums UNIX for Advanced & Expert Users Get files from sdlt tapes Post 302283867 by otheus on Wednesday 4th of February 2009 09:13:51 AM
Old 02-04-2009
Well, look, it's clear you have variable block sizes, or a very small block size. Use the data from tcopy to use dd to save the contents of the records onto disk, like this:
Code:
dd if=/dev/rmt/6n ibs=3200 count=1 of=/tmp/record1
dd if=/dev/rmt/6n ibs=400 count=1 of=/tmp/record2
dd if=/dev/rmt/6n ibs=8240 count=53961 of=/tmp/record4

Then run "file record*" to see file can determine what type of file each record is in. You might try:
Code:
cat record* >record-tmp
file record-tmp

to see if maybe the whole file together is a different thing.

At least now you have a template for getting all the records off the tape. Whether you can do anything with them or not is a different problem.
 

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device_maps(4)                                                     File Formats                                                     device_maps(4)

NAME
device_maps - device_maps file SYNOPSIS
/etc/security/device_maps DESCRIPTION
The device_maps file contains access control information about each physical device. Each device is represented by a one line entry of the form: device-name : device-type : device-list : where device-name This is an arbitrary ASCII string naming the physical device. This field contains no embedded white space or non- printable characters. device-type This is an arbitrary ASCII string naming the generic device type. This field identifies and groups together devices of like type. This field contains no embedded white space or non-printable characters. device-list This is a list of the device special files associated with the physical device. This field contains valid device special file path names separated by white space. The device_maps file is an ASCII file that resides in the /etc/security directory. Lines in device_maps can end with a `' to continue an entry on the next line. Comments may also be included. A `#' makes a comment of all further text until the next NEWLINE not immediately preceded by a `'. Leading and trailing blanks are allowed in any of the fields. The device_maps file must be created by the system administrator before device allocation is enabled. This file is owned by root, with a group of sys, and a mode of 0644. EXAMPLES
Example 1: A sample device_maps file # scsi tape st1: rmt: /dev/rst21 /dev/nrst21 /dev/rst5 /dev/nrst5 /dev/rst13 /dev/nrst13 /dev/rst29 /dev/nrst29 /dev/rmt/1l /dev/rmt/1m /dev/rmt/1 /dev/rmt/1h /dev/rmt/1u /dev/rmt/1ln /dev/rmt/1mn /dev/rmt/1n /dev/rmt/1hn /dev/rmt/1un /dev/rmt/1b /dev/rmt/1bn: FILES
/etc/security/device_maps SEE ALSO
allocate(1), bsmconv(1M), deallocate(1), dminfo(1M), list_devices(1) NOTES
The functionality described in this man page is available only if the Basic Security Module (BSM) has been enabled. See bsmconv(1M) for more information. SunOS 5.10 16 Jan 2001 device_maps(4)
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