-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > Does the splitting problem occur if you write to the tape with dd and > then read it back? > > e.g. something like > > dd if=/dev/urandom of=/tmp/largefile bs=512k count=10000 mt -f /dev/nst0 > rewind dd if=/tmp/largefile of=/dev/nst0 bs=512k dd if=/tmp/largefile > of=/dev/nst0 bs=512k mt -f /dev/nst0 rewind dd if=/dev/nst0 of=/dev/null > bs=512k
gundabad ~ # dd if=/dev/urandom of=/tmp/largefile bs=512k count=10000 9999+1 records in <--- this is a bit strange 9999+1 records out 5242567182 bytes (5.2 GB) copied, 922.047 s, 5.7 MB/s gundabad ~ # mt -f /dev/nst0 rewind gundabad ~ # dd if=/tmp/largefile of=/dev/nst0 bs=512k dd: writing `/dev/nst0': Invalid argument 9999+1 records in 9999+0 records out 5242355712 bytes (5.2 GB) copied, 42.9369 s, 122 MB/s gundabad ~ # dd if=/tmp/largefile of=/dev/nst0 bs=512k dd: writing `/dev/nst0': Invalid argument 9999+1 records in 9999+0 records out 5242355712 bytes (5.2 GB) copied, 39.66 s, 132 MB/s gundabad ~ # mt -f /dev/nst0 rewind gundabad ~ # dd if=/dev/nst0 of=/dev/null bs=512k 9999+0 records in 9999+0 records out 5242355712 bytes (5.2 GB) copied, 38.5814 s, 136 MB/s So, except for the strangeness of the test file initially being created too short (5242567182 bytes are 9999 blocks and a leftover of 211470 bytes, could that be a urandom limitation?), the drive appears to work fine: The 5.2 GB written are read as a single 5.2 GB file (and not split, as btape would do with a blocksize of 512 KB). If you need any more tests, please let me know. Best, Andreas -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlI5o44ACgkQk5ta2EV7DoxDlgCgpy/BE7PmdgTNuV5nm7paXiRz lK4AoIXaK92+1trKgEcZlwQdB7r9RSqY =6raZ -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
