> > restore tvf u1_l0_04-29-09_md1.dump Verify tape and initialize maps > Input is from a local file/pipe > Checksum error 20311110402, inode 0 file (null) > restore: Tape is not a dump tape what does 'file' think the file is - i.e. what does file u1_l0_04-29-09_md1.dump say? > > > Here's a log file from when the backup was done back in 2009: > > DUMP: Date of this level 0 dump: Wed Apr 29 09:24:36 2009 > DUMP: Dumping /dev/md1 (/u1) to u1_l0_04-29-09_md1.dump > DUMP: Label: /u1 > DUMP: Writing 10 Kilobyte records > DUMP: Compressing output at compression level 2 (bzlib) > DUMP: finished in 23704 seconds, throughput 4075 kBytes/sec > DUMP: Date of this level 0 dump: Wed Apr 29 09:24:36 2009 > DUMP: Date this dump completed: Wed Apr 29 16:00:09 2009 > DUMP: Average transfer rate: 2146 kB/s > DUMP: Wrote 96607840kB uncompressed, 50878096kB compressed, 1.899:1 > DUMP: DUMP IS DONE The dump is compressed. What was the command line you used to create the dump file? Have you tried using restore tzvf u1_l0_04-29-09_md1.dump > > Have there been any changes to the format of dump files and if so, is > there a version available that can read this older backup? I don't think dump has changed anything in 20 years or so! And I certainly can't see it changing such that it can't read old files - that is, sort of, it's raison d'etre. P.