Re: dump, restore

[Finn Thain <fthain@linux-m68k.org>]

On Sat, 3 Aug 2024, Stan Johnson wrote:

> 
> root@m68k:/data# dump 0sbf 999999 64 dumpfile.dmp /dev/sda5
> ...
>   DUMP: Context save fork fails in parent 912
> 

The manpage says,

    Each reel requires a new process, so parent processes for reels 
    already written just hang around until the entire tape is written.

So I'd expect fork failures if the number of reels was too high. Have you 
tried the default "auto-size" tape length instead of passing -s 999999?

    -a
        auto-size. Bypass all tape length calculations, and write until an 
        end-of-media indication is returned. This works best for most 
        modern tape drives, and is the default. Use of this option is 
        particularly recommended when appending to an existing tape, or 
        using a tape drive with hardware compression (where you can never 
        be sure about the compression ratio).

If auto-size works, that might indicate a bug in the tape length 
calculations that would need to be reported.