On 9/16/22 14:07, Bill Cunningham wrote:
Some time back I asked for opinions on backups. I had a lot of good
opinions. I tried to backup some directories with dump. Which seemed to
me to be quick and for what I was altogether looking for, for ext 2/3,
pretty good. A 16GB filesystem was copied to a level 0 dump at around
1.5 GB. So it seems.
I have several favorites, but in regards to dump, for those that
are familiar with it; I did a level 0 dump and before I try restoring an
erased partition I though I would clean up a few questions.
As far at the partition's bootsector, would that happen to be in
the dump file? And I am pretty sure partition table entries or any of
the MBR are not saved. Timestamps and uuid type data of course I would
not see to be saved. Although on my fstab, I use simple /dev/sdXX
entries (/dev/sda1) not uuids. device.map might have to be regenerated
too to get a booting system.
You must have a system that has been updated for a long time or manually
configured. /dev entries haven't been used for a long time, only UUIDs
now. "dump" works primarily at the file level, not the filesystem
level, so it doesn't backup the filesystem metadata. If you do a
restore, you will have to create the filesystem first, where you can
specify the UUID if you know what it is.
I did not leave out anything system wise specifically by cli
options. /var, /sys, /run, /tmp, /proc I am assuming are in the level 0
dump. The switches I used were:
/sys, /run, /tmp, and /proc are virtual filesystems and not part of /,
so you will get the directory entries themselves, but no content, which
is what you want anyway.
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