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Re: painted into a corner



On 08/19/2018 12:40 PM, Gene Heskett wrote:
Greetings all;

I just installed stretch to a fresh 2T HD. letting it autopartition and
format for separate /, swap, /var and /home partitions. But I didn't let
it overwrite the grub on the 1st drive it was/is  booting wheezy from.

I figured I'd mount it to wheezy and copy over my personal stuff, like an
email corpus well over 15GB reaching back to 2002.

But I can't mount much of the drive, / is all that will actually mount,
because the 2 versions of ext4 are incompatible, nearly all the mount
and e2tools can't touch the installers ext4 file systems.

For instance, its not mounted:
gene@coyote:~$ e2fsck /dev/sdb8
e2fsck 1.42.5 (29-Jul-2012)
/dev/sdb8 has unsupported feature(s): metadata_csum
e2fsck: Get a newer version of e2fsck!

And of course whats installed to wheezy is the latest available wheezy
version of e2fsck.

Whats the recommended way to do these mounts so I can maintain as much
continuity as possible?

Thanks all.

Migrations are much easier when you have additional computers and parts drives to help. I have a dedicated file and version control server. I also have a machine for backups, archives, images, and whatever else (workbench). All of my machines have HDD/ SDD mobile racks, so it is easy to move drives around.


I prefer small SSD's for system drives -- 16+ GB. I use large HDD's for file server data drives and for storing backups, archives, and images. I would use that 2 TB for one of the non-system drive purposes.


When I want to upgrade a machine, I ensure that all of the configuration files are checked into version control and that all the data is backed up/ archived. I pull all of the drives, and take an image of the system drive. The old drives go on the shelf, in case I want to revert.


Next, I insert a wiped 2.5" SSD system drive into the target machine and do a fresh install. I take an image of the system drive.


Next, I install applications, adjust configuration files, restore data, etc., adding drives, taking notes, and using version control as needed.


Once the rebuilt machine is complete and operational, I integrate it into my backup/ archive system and take another image of the system drive.


David


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