I have a 1T SSD that I want to reformat.
So I am doing a full backup to my HDD
It is like
sda1 600MB efi
sda2 100MB MSreserved
sda3 67GB ntfs
sda4 1GB ext4 /boot
sda5 900GB btrfs
Please let me know how to do it in a better way:
- For each subvol in btrfs volume, using btrfs send/receive to the HDD’s btrfs volume
- remove sda5 using fdisk
- use qemu-img to dump the remaing data into a qcow2 file
qemu-img -f ram -O qcow2 /dev/sdb my1Tssd-sda1234.qcow2
My problem is:
The qcow2 file is way larger than 100GB now and still in progress.
What is the correct method to avoid copying those 900GB space not belonging to any partitions?