It's late here, so I will know the results Sunday morning. Take care.
Le 03/06/2023 à 23:55, Pawel Loba a écrit :
Thank you. I am going to start this process in about an hour and I===============================================================================
will report my results.
On 6/3/23, Didier Spaier <didier@xxxxxxxx> wrote:
It worked here (TM) as I am posting from the new drive.
So, as far as I can tell and if you have no more questions, go.
I just forgot an information: after "btrs replace" the file system will hae
the
same size as it had on the external drive. To make it as big as the new
partition, just type after reboot (still as root or using sudo):
mount /dev/sda2 /mnt
btrfs filesystem resize max /mnt
This will be done instantly. Simple as that ;)
Cheers,
Didier
Le 03/06/2023 à 20:46, Didier Spaier a écrit :
I forgot an important information: before issuing the command:
btrfs replace start 1 /dev/sda2 /mnt
type:
swapoff -a
as btrfs won't replace (move) a device if there is an active swapfile.
If you don't do that the replacement just won't start.
Le 03/06/2023 à 20:38, Didier Spaier a écrit :
I have started a test. As the target is an USB stick (so slow...) it can
take a
long time, so please be patient and wait until I give you a "go" before
applying
the instructions below.
Meanwhile you can already prepare the internal drive.
All commands below should be typed as root or using sudo.
First as recommended by Forza here:
https://wiki.tnonline.net/w/Btrfs/Replacing_a_disk
issue blkdiscard to clear the internal disk (assuming it's an SSD):
blkdiscard /dev/sda -v
Then make at least two partitions on /dev/sda using gdisk or cgdisk
1. a partition of size 100M, type EFI system (code ef00)
2. a partition use the remaining space, type Linux (thios is the
default)
Then format the first partition:
mkfs.fat /dev/sda
Do *not* format the second partition.
Tell us if you need help to use the commands cgdisk or gdisk
For cgdisk type "cgdisk -a /dev/sda" which makes this utility more
accessible
(for the records, fulfilling a request from Philippe Delavalade many
years ago).
Notes :
a. You may choose to create other partitions on /dev/sda, but the
partition
/dev/sda2 should be at least as big as the partition mounted as / on the
external drive (but you can easily shrink the latter first if you want. I
will
tell you how if that is the case).
b. I assume that this machine will only boot on EFI mode. Else a not
formatted
partition of type BIOS Boot (code ef02) size 4M is also needed to make
GRUB happy.
Once /dev/sda has been prepared, do this after I give you the "go":
1. Remount the partition hosting / as /mnt
As you installed in auto mode I assume that this is /dev/sdb3, which you
can
check with this command:
findmnt -no source /|cut -d[ -f 1
2. Then just type:
mount /dev/sdb3 /mnt
3. To replace (move) the root file system (from) /dev/sdb3 by (to)
/dev/sda2 type:
btrfs replace start 1 /dev/sda2 /mnt
In this command 1 is the device number (should be 1 as this is file
system on a
single device), /dev/sda2 the new partition (new location of the file
system)
and /mnt the mount point of the current one.
This will take a long time.
You can check the progress typing:
btrs replace status /mnt
You can do that several times (type Ctrl+C get back the prompt)
When the replacement will be completed just reinstall and update grub:
grub-install /dev/sda
update-grub
After that you can check the layout of the new GRUB boot menu typing:
list-boot-entries
You should not have to edit /etc/fstab as the UUID of the root file
system will
not have changed.
Here the replacement is done at 77.9%, so expect a "go" or a "no go" in
less
than one hour ;)
Meanwhile, questions?
Cheers,
Didier
Le 03/06/2023 à 18:09, Pawel Loba a écrit :
The output of your command is:
/dev/sda
/dev/sdb
where sda i the internal and sdb is the external hard drive.
Thank you,
Pawel
On 6/3/23, Didier Spaier <didier@xxxxxxxx> wrote:
I meant the drive name, as listed in the output of:
lsblk -lpo name,type|grep disk|cut -d" " -f1
Le 03/06/2023 à 19:29, Pawel Loba a écrit :
Machine name on the external drive is deimos.
On 6/3/23, Didier Spaier <appartement.cdm@xxxxxxx> wrote:
Then that will be easy.
I just chatted with btrfs experts to find the simplest way. I will
try
locally
before sending a detailed how-to. Meanwhile please tell how the
external
internal drive is named.
Cheers,
Didier
Le 03/06/2023 à 18:39, Pawel Loba a écrit :
The internal drive is completely empty with 2 TB space.
The external one was created with auto mode and its size is close to
1
TB.
Thanks,
Pawel
On 6/3/23, Didier Spaier <appartement.cdm@xxxxxxx> wrote:
Probably. Did you install it in auto mode? And do you have an ESP
(EFI
System partition) in the internal drive as well as a big enough
unused
partition or free space on this drive?