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Skip to main content. If you have a modern SCSI tape drive and you are having problems with the test command as noted above, it may be that some program has set one or more of your SCSI driver’s options to non-default values. The compression ratio actually achievable depends on the data being compressed.
LTO Ultrium Tape Drives
Because defice are often problems with certain tape drives or systems when end of tape conditions occur, btape has a special command fill that causes it to write random data to a tape until the tape fills. The cassette contains magnetic tape to provide different audio content using the same player.
I’m going to write one record in file 0, two records in file 1, and three records in file 2 btape: A much more optimal Device configuration is shown below, but does not work with all tape drives. It then writes at least one more Bacula block to a second tape. The format includes information about the type of device, rewind type, alias, and compression type.
The test using constant string will give you the maximum speed of your hardware chain. Note, there is also a single tape option as noted below, which you should use rather than the two tape test.
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Tape cassette with two reels Linear serpentine recording . The solution to the problem is: Multiple head assemblies and servos per drive .
If a write length is greater than the physical block size of the drive, the write will be written as two blocks each of the fixed physical size. Checkout before your order will be cancelled. Views Read Edit View history. On some systems, you can also get ultrrium list of all available density codes with: So, the path is equivalent to the sequfntial device name, and the filename is equivalent to the volume name. We are not responsible for any typographical errors.
See below for the details on checking and setting the default drive block size. Make sure you have the latest firmware loaded.
Tape device name format
Archived from the original on Some SCSI tape drivers will use a fast means of seeking to the end of the medium and in doing so, they will not know the current file position and hence return a Archived from the original on March 10, Depending on your tape drive, the test may recommend that you add certain records to ulteium configuration.
Instructions and downloads of HP TapeAssure are available at: You only need to mount a blank tape, enter the command, and the output should be reasonably self explanatory. By default, they use bacula-sd. Retrieved from ” https: Tape media generally has a favorable unit cost and a long archival stability.
Problem Resolution Guide Previous: There sequentiao no real slow mode like in Solaris – I just expect, that for older tape drives Filemarks may be slower than End-of-data, but not so much as in Solaris slow mode. The above commands will clear all options and then set those specified. Now the important part, I am going to attempt to append to the tape.
If you order an assembly or kit number, the part number ordered may not appear on the item.