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Wondering if installation transfers is possible. (lemmy.world)
submitted 1 week ago by Lost_My_Mind@lemmy.world to c/linux@lemmy.world
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So on android in 2010 I used to be into the idea of rooting my phone, and installing custom roms.

Distros are essentially custom roms for your pc. Same concept.

There was a program called TWRP that I could use. Back then it would make a full backup of EVERYTHING on your internal drive. It was mostly used after you already had a custom rom.

But it backedup EVERYTHING. If you wrote a txt message as a draft, and didn't sent it, then backed up with TWRP, whenever you restored on a new phone, that txt draft was there too. It was literally like your phone took an all encompassing picture of everything on your phones internal drive, every single file and setting, and made a backup. Saving it to your sd card.

So I'm thinking, linux should theoretically be able to do this. Maybe it does.

What if my current install is on a 250gb drive, and I buy a completely different 4TB drive? What if I want to do this total backup, save the backup to a usb hard drive, then put in a NEW hard drive, and have it restore the backup so now my entire old hard drive is now on my new hard drive? And every setting, every file, every last detail is an exact replica.

Could I do that?

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[-] MangoPenguin@lemmy.blahaj.zone 1 points 1 week ago

Does linux have an equivalent of VSS on windows? I always thought it was odd that Linux needed to be offline to do a disk image whereas on windows I can just do it without rebooting or anything.

[-] CameronDev@programming.dev 2 points 1 week ago* (last edited 1 week ago)

VSS equivalent would be btrfs snapshots or zfs snapshots.

Can you really copy a VSS to a new disk? For a new install, at some point you'll need to reboot and go offline, so I don't see the point in trying to keep uptime. If uptime matters, dont upgrade a disk, replace the entire system.

[-] the_crotch@sh.itjust.works 2 points 1 week ago

You can mount vss and clone it like you would an offline drive

[-] MangoPenguin@lemmy.blahaj.zone 1 points 1 week ago* (last edited 1 week ago)

You don't directly copy VSS to the new disk, it freezes a point in time that you can then backup with other software.

[-] hendrik@palaver.p3x.de 1 points 1 week ago* (last edited 1 week ago)

Is VSS even a backup? I thought it just copies old revisions of files into that shadow area so you can revert them to an old version after you modified them... But I don't think it's a full backup or allows you to restore something like a broken filesystem or any severe error?! I guess you could achive a similar thing with practically any linux backup solution on online filesystems, just that the restore will be a bit more cumbersome. Or something like a snapshot, that'll do everything and even more... Or take one of the backintime clones, if it's userdata...

[-] BenM2023@lemmy.world 3 points 1 week ago* (last edited 1 week ago)

Is VSS even a backup?

Nope, not even close.

I thought it just copies old revisions of files into that shadow area

It just copies the deltas...

Backups can use vss to get a static image of the volume (deltas are written to the shadow area, which isn't backed up, whilst the backup is running) it's a little different for vhdx files on VMs but basically the same.

It's magic.... And often means that I don't have to restore lost files from backup, just view the old versions and grab a copy from there.

[-] MangoPenguin@lemmy.blahaj.zone 2 points 1 week ago

It freezes a point in time that you can then make an image of without worrying that files will be broken from being backed up while in use.

this post was submitted on 16 Dec 2024
24 points (90.0% liked)

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