backdown mirror

backdown mirror [OPTIONS] <COMMAND>

backdown mirror add#

Start mirroring FOLDER into MIRROR (a folder on another drive)

backdown mirror add [OPTIONS] <FOLDER> <MIRROR>

Arguments#

<FOLDER>

The folder to keep copied, usually part of the archive.

<MIRROR>

Where the copy goes: a folder on another drive. Neither folder may be inside the other.

Options#

--verify-every <VERIFY_EVERY>

Re-read a sample of the mirror every this many days. Default: 30.

backdown mirror list#

Mirrors, and how they were when last synced and verified.

backdown mirror list [OPTIONS]

backdown mirror sync#

Copy what's new or changed (old copies are kept aside; nothing is deleted)

backdown mirror sync [OPTIONS] [ID]

Arguments#

[ID]

A mirror's number from backdown mirror list. Without it, every mirror.

backdown mirror verify#

Re-read files on the mirror and compare them with the source.

backdown mirror verify [OPTIONS] [ID]

Arguments#

[ID]

A mirror's number from backdown mirror list. Without it, every mirror.

Options#

--percent <PERCENT>

Share of the files to re-read (a different share each day). Default: 5.

--all

Re-read every file.

backdown mirror remove#

Stop keeping a mirror (the copies stay where they are)

backdown mirror remove [OPTIONS] <ID>

Arguments#

<ID>

A mirror's number from backdown mirror list.

All of them also take the global options --db and --local.

Good to know#

A sync never deletes: when a file changed, the mirror's old copy is moved to .backdown-versions/ in the mirror first, and files that exist only on the mirror are kept and counted. The daemon syncs each mirror daily and re-reads a sample on its schedule, whenever both drives are connected.

Examples#

backdown mirror add /media/archive/Archive/Mail /media/backup/Mail
backdown mirror list
backdown mirror sync
backdown mirror verify 1 --all
backdown mirror remove 1

See also#

• Keep a mirror