<html><head></head><body>That's where the rolling backup/restore process is useful.<br><br>Of course there's a rabbit hole of depth of backup storage. Bit rot happens on tape, too. I've seen diff run between archivals of full backups as a deterrent to mylar-backed bit rot. The goal was to have two tape copies of each file.<br><br>The other process involved just a verified tape copy. So make a checksum verified full backup. Then copy that backup offline and reverify. But this does require two tape drives. <br><br>For the small scale setup, using nearline hard drives for main backup process and a selection of external drives for archival copies. Critical file archival on worm media like the m-disk dvds and blue-ray are very affordable.<br><br>LTO tape drive are fantastically expensive but highly reliable. The version 8 drives are $8k. Hmm. Maybe that's what the versioning is. The v6 drives were $6k and the v3 were in the $3k range. I am NOT looking forward to the v12 model. Yikes!<br><br><div class="gmail_quote">On January 19, 2019 7:29:38 PM EST, Steve Litt via Ale <ale@ale.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">On Sat, 19 Jan 2019 09:27:46 -0500<br>DJ-Pfulio via Ale <ale@ale.org> wrote:<br><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">$ sudo rdiff-backup --force --remove-older-than 60D /Backups<br></blockquote><br>Sometimes it could be years before you know a file got corrupted or<br>deleted.</pre></blockquote></div><br>-- <br>Sent from my Android device with K-9 Mail. All tyopes are thumb related and reflect authenticity.</body></html>