I try to run my disks less than 70% full otherwise you get too much fragmentation, so if you are rsyncing you are essentially backing up empty disk, unless of course your disks are very full. I use external USB docks and bare drives I can plug in and do filesystem backups to those. Some of these setups I can fit 2 or 3 backups on the external disks depending on how modern the dock is and if is compatible with the USB chip in the server it's plugged into.
Ted -----Original Message----- From: PLUG <[email protected]> On Behalf Of Rich Shepard Sent: Friday, March 24, 2023 11:41 AM To: Portland Linux/Unix Group <[email protected]> Subject: Re: [PLUG] External drive issue On Fri, 24 Mar 2023, Ted Mittelstaedt wrote: > I never depend on RAID either RAID5 or mirroring for backup purposes. Ted, Since having 2 drives in a RAID1 array and mirrored in a logical volumne for backup, and both drives were somehow wiped, I'm thinking of using only one disk (with xfs installed) for /media/backup and using a cron job (running after the daily backup at 00:30) to rsync to the other disk. That way I have two mirrored backups independent of each other. I'll ponder this overnight. Having separate hard drives containing the same backups (one written by dirvish the other rsync'd) seems to me to be less likely to both fail at the same time. Regards, Rich
