Operating System Device Drivers
14
SDLT Tape Drives Reference Guide
Verify Compression
The following command returns the current compression setting of the drive:
tapecntl -C /dev/rmt/ctape1
Example of returned data:
Tape Compression = 1
Tape Decompression =1
Note:
Tape Decompression will always be set to 1.
Caldera Open UNIX
Caldera Open UNIX provides native drive recognition. Supplemental drivers are
not required. The operating system defaults to a generic SCSI device and to the
default settings of the tape drive.
The SDLT drive provides compression so that the storage capability for tapes can
be effectively doubled when the SDLT drive has been instructed to turn on
compaction. This is known as hardware compaction and should be used instead of
the software compaction that is sometimes provided by software products.
Table 6: Additional tapecntl Commands
Task
Command
Retention Tape
tapecntl -t /dev/rmt/ctape1
Rewind Tape
tapecntl -w /dev/rmt/ctape1
Tar Write
tar cvf /dev/rmt/ctape1 ./largefile
Tar Read
tar xvf /dev/rmt/ctape1
DD Write
dd if=./largefile of=/dev/rmt/ctape1 bs=512
DD Read
dd if=/dev/rmt/ctape1 of=./largefile bs=512
201412-003.book Page 14 Thursday, October 3, 2002 9:05 AM
Содержание StorageWorks SDLT 320
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Страница 58: ...Specifications 46 SDLT Tape Drives Reference Guide 201412 003 book Page 46 Thursday October 3 2002 9 05 AM ...
Страница 70: ...Density Select 58 SDLT Tape Drives Reference Guide 201412 003 book Page 58 Thursday October 3 2002 9 05 AM ...
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