Point it at every drive you own
Old laptops, NAS shares, the USB disk in the drawer. Sources are mounted read-only and tracked by serial number, never by /dev/sdX, so the wrong disk is never touched.
Where it came from
Built on 27 million files and a drawer of old drives.
BackDown began as a one-off job: consolidate years of old disks onto one archive and wipe the rest. The hard part was never copying bytes.
Five of six drives held generations of the same data. The most valuable thing on them, a mail server's archive, only turned up by reading the shell script that once backed it up. And 5.9 TB of the biggest drive was quietly duplicating itself.
No backup tool would have told us any of that. So we built one that does.
27M
files indexed, with every job resumable when a USB drive dropped off the bus
15 TB
of storage read and hashed, with source drives mounted read-only throughout
5.9 TB
of the biggest drive found duplicating itself
3
drives wiped, each only after every byte was hash-verified elsewhere