On 16/11/2018 14:46, Stefan Monnier wrote:
I would expect the clone to work just fine. I'd expect your initrd
contains drivers for both SATA and NVMe anyway.
OK. Now that I know that initrd does contain NVMe drivers, I would ask
whether my strategy for cloning is sensible.
Firstly, here's my original partition table:
===================================
$ sudo parted -l
Model: ATA APPLE SSD SM0128 (scsi)
Disk /dev/sda: 121GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 20.5kB 210MB 210MB fat32 EFI System Partition
boot, esp
2 210MB 22.6GB 22.4GB hfs+
3 22.6GB 23.2GB 650MB hfs+
4 23.2GB 31.2GB 8000MB linux-swap(v1) swap
5 31.4GB 121GB 89.8GB ext4 linux
===================================
Partition 3 is macOS, partition 5 is linux. I don't know why partition 2
is there, macOS's Disk Utility created it when I originally partitioned
the disk to make room for linux.
Partition 1 is the EFI partition, which is mounted on /boot/efi:
===================================
$ df
Filesystem 1K-blocks Used Available Use% Mounted on
udev 4021656 0 4021656 0% /dev
tmpfs 807236 1352 805884 1% /run
/dev/sda5 85825416 68182636 13240004 84% /
tmpfs 4036168 4892 4031276 1% /dev/shm
tmpfs 5120 4 5116 1% /run/lock
tmpfs 4036168 0 4036168 0% /sys/fs/cgroup
/dev/sda1 201633 23678 177955 12% /boot/efi
tmpfs 807232 0 807232 0% /run/user/113
tmpfs 807232 16 807216 1% /run/user/1000
===================================
The debian installer put the Grub2 loader in this partition:
===================================
$ sudo ls /boot/efi/EFI/debian
grubx64.efi
$ sudo efibootmgr -v
BootCurrent: 0000
Timeout: 5 seconds
BootOrder: 0000,0080
Boot0000* debian
HD(1,GPT,d43355a1-7dc2-4a96-ba68-4400a5db3981,0x28,0x64000)/File(\EFI\debian\grubx64.efi)
Boot0080*
PciRoot(0x0)/Pci(0x1c,0x5)/Pci(0x0,0x0)/Sata(0,0,0)/HD(3,GPT,911f18b9-6252-4cb8-8ad3-81c9ca73ded5,0x2a0f760,0x135f20)/File(\System\Library\CoreServices\boot.efi)
Boot0081* Mac OS X
PciRoot(0x0)/Pci(0x1c,0x5)/Pci(0x0,0x0)/Sata(0,0,0)/HD(3,GPT,911f18b9-6252-4cb8-8ad3-81c9ca73ded5,0x2a0f760,0x135f20)
BootFFFF*
PciRoot(0x0)/Pci(0x1c,0x5)/Pci(0x0,0x0)/Sata(0,0,0)/HD(3,GPT,911f18b9-6252-4cb8-8ad3-81c9ca73ded5,0x2a0f760,0x135f20)/File(\System\Library\CoreServices\boot.efi)
===================================
Now, here is what I would perform:
(1) Use macOS Time Machine to backup macOS on an external hard drive.
(2) dd the linux partition into an image file:
$ sudo dd bs=4M if=/dev/sda5 of=<ext_media>/debian_part.img
(3) Install new drive.
(4) Use macOS Recovery to restore macOS from the Time Machine backup.
(5) I believe that point (4) will also restore the EFI partition, but
will debian/grubx64.efi be preserved as well? Need to gather some info
and check. Anyhow, I should have ended up with just two partitions: the
EFI partition and the macOS partition.
(6) Use macOS Disk Utility to partition the new disk.
(7) How to restore the backed up debian partition? Do I need to
reinstall a basic debian system from scratch and then run something like:
sudo dd bs=4M if=<ext_media>/debian_part.img of=/dev/sdaN
(where N is the new partition number)?
Or is there some tool that can ease the recovery process?
Thanks!
