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>Number: 60565
>Category: bin
>Synopsis: dump(8): units are confusing
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: bin-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Aug 09 22:40:00 +0000 2026
>Originator: Taylor R Campbell
>Release: current, 11, 10, 9, ...
>Organization:
The NetBSDump Unit, Inc.
>Environment:
>Description:
dump [-0123456789aceFinStuX] [-B records] [-b blocksize] [-d density]
[-f file] [-h level] [-k read-blocksize] [-L label] [-l timeout]
[-r cachesize] [-s feet] [-T date] [-U dumpdev] [-x snap-backup]
files-to-dump
...
-b blocksize
The number of kilobytes per dump record.
What is the default if I don't pass this? Is there a minimum?
Is there a maximum?
# dump -0 -a -X -S /repo/hg
DUMP: Dumping sub files/directories from /repo
DUMP: Dumping file/directory /repo/hg
DUMP: Found /dev/rxbd1 on /repo in /etc/fstab
DUMP: Date of this level 0 dump: Sun Aug 9 22:33:45 2026
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping a snapshot of a subset of /dev/rxbd1 (a subset of /repo) to /dev/null
DUMP: Label: none
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 17955272 tape blocks.
Can we print this in MiB/GiB/TiB too, no matter what the block
size is?
>How-To-Repeat:
man dump
>Fix:
Yes, please!