An old or bad tape. This has two consequences: If the name is not found in the list of physical names, the utility program will compare the name you entered to the Device names rather than the Archive device names. Newer drives support both modes, but some drives such as the QIC devices always use fixed block sizes. Note, that btape writes random data to the tape when it is filling it. Even in variable block mode, with the exception of the first record on the second or subsequent volume of a multi-volume backup, Bacula will write blocks of a fixed size.

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There is also a driver for the tape library but most applications don’t require the library driver to be installed so you might not need it. You should first ensure that your tape drive is set for variable block mode see below.

If Bacula works fine with your drive, then all off a sudden you get error messages similar to the one shown above, it is quite possible that your driver module is being removed because the kernel deems it idle.

If you would like to know what options you have set before making any of the changes noted above, you can now view them on Linux systems, thanks to a tip provided by Willem Riede. According to the documentation, one may never write an amount of data that is not the exact multiple of the blocksize it is not specified if an error occurs or if the the last record is padded.

Hp Ultrium 1 Scsi Scsi Sequential Device Driver Download

I’ve cut the listing short because it is frequently updated to have new tests. If your tape drive is in fixed block mode and you have told Bacula to use different fixed block sizes or variable block sizes defaultyou will get errors when Bacula attempts to forward space to the correct block the kernel driver’s idea of tape blocks will not correspond to Bacula’s.


However, if you have written tapes using fixed block sizes, this can be a bit of a pain. If you are not getting good performance, consider some of the following suggestions from the Allen Balck on the Bacula Users email list:.

Bacula attempts to fill and write complete blocks default 65Kso that in normal mode variable block sizeBacula will always write blocks of the same size except the last block of a Job. In particular, you may want to look at the Tips for Resolving Problemsproblems1 section below. If at all possible avoid using fixed blocking. If you request less bytes than are in the record, only those number of bytes will be returned, but the entire logical record will have been read the next read will retrieve the next record.

Finally, it reads back both tapes to ensure that the data has been written in a way that Bacula can recover it. It is also possible that you have your drive set in SysV tape drive mode. This has been confirmed by several other people using different hardware. Permissions can also cause drivers to not install properly. This will cause Bacula to use the MTFSF request to seek to the end of the medium, and Bacula will keep track of the file number itself. Note that in such cases, Bacula is perfectly able to write to your Volumes tapesbut cannot position to read them.

This should be done only if your drive does not support variable block sizes, or you have some other strong reasons for using fixed block sizes.

The drive must use BSD zcsi conventions. Volume data error at 0: This can be an extremely time consuming process here it is about 6 hours to fill a full tape. Without those parameters, the testing and utility programs do not know how to properly read and write your drive.


That card will probably work with the DL as well but won’t be officially supported so you might run into problems if you have to call for server support.

Hp Ultrium 1 Scsi Scsi Sequential Device Driver Download

See below for more help of resolving fix versus variable block problems. Auto-suggest helps you quickly narrow down your search sequentiak by suggesting possible matches as you type.

However, in reading a tape, Bacula will assume that for each read request, exactly one block from the tape will be transferred. For the program to work, it must find the identical name in the Device resource of the configuration file.

The long term solution is to run your drive in variable block mode as described above. If you have been previously running your tape drive in fixed block mode default and Devive with variable blocks defaultthen in version 1. If Bacula is configured to write fixed block sizes, it will pad the last block of the Job esquential the correct size.

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Hewlett Packard Enterprise International. Uktrium you must run with fixed size blocks, make sure they are not bytes. The test using constant string will give you the maximum speed of your hardware chain.

This the most common way that tape drives work and is well supported by Bacula. Let me know if you have any questions.

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