On 19 Jun 2024 at 14:52, Tim via users wrote:
Subject: Re: Interesting mount problem - F40 To: Community support for Fedora users users@lists.fedoraproject.org Date sent: Wed, 19 Jun 2024 14:52:36 +0930 Send reply to: Community support for Fedora users users@lists.fedoraproject.org From: Tim via users users@lists.fedoraproject.org Copies to: listfrank1@gmail.com, Tim ignored_mailbox@yahoo.com.au
On Tue, 2024-06-18 at 11:40 -0400, Tom Horsley wrote:
Using dd to back up a disk leaves the copy with the exact same UUID as the source. So it is just down to random timing and order of operations as to which disk it will choose, so using /dev/sda instead of UUID is one possible solution, but there are UUID values in lots more places than /etc/fstab. (grub.cfg for one, but other files as well like the /boot/loader/entries files).
If one was cloning a drive so you can quickly recover from a failure by using the other drive, I would think that for the least surprises, you have to be unplugging the copy when cloned. Then actually swap drives over if you needed to use it, instead.
I've been the maintainer of the G4L disk imaging project going back to 2004. If the mounting is using the blkid of the partitions that is definitely true. If it was using /dev/sdx then would also have to modify that or switch the connections.
If you clone drives at the bit level that is true. G4L also allowed maked img files, that are compressed, and could then be restored to a new disk to replace a failed disk, and then having the same blkid as original was not a problem.
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+------------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor (Retired) mailto:mikes@guam.net mailto:msetzerii@gmail.com mailto:msetzerii@gmx.com Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +------------------------------------------------------------+