Re: Copy a tape with a single drive...
Michel Figgins <[email protected]>
| Newsgroups | gmane.comp.bacula.user |
|---|---|
| Message-ID | <[email protected]> |
Just a general question: Why would dd if=/dev/nst0 of=somefile care about tape logical files? - Michel -----Original Message----- From: Bill Arlofski via Bacula-users <[email protected]> Sent: Friday, January 31, 2025 10:08 AM To: Martin Simmons <[email protected]> Cc: [email protected] Subject: Re: [Bacula-users] Copy a tape with a single drive... On 1/31/25 3:48 AM, Martin Simmons wrote: >>>>>> On Thu, 30 Jan 2025 17:20:21 +0000, Bill Arlofski via Bacula-users said: >> >> If I understand correctly, you just want to copy an entire tape to another tape but only have one tape drive? >> >> If yes, you can do this entirely outside of Bacula by using `dd` to >> read the entire tape to a file on disk, then use `dd` again to read the file and write to the new tape. > > I suspect that isn't easy, because tapes are split into logical files > (BaculaSD's "MaximumFileSize"). > > That means you have to run dd repeatedly (to separate disk files) to > get every tape logical file, then the same number of dds to write > those logical files to the new tape and then maybe use mt weof the > correct number of times at the end to match BaculaSD's "TWO EOF" setting? > > __Martin Ahhh! Yes, you are exactly correct Martin! I hadn't considered the file markers! 🤦 Best regards, Bill -- Bill Arlofski [email protected] _______________________________________________ Bacula-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/bacula-users