Hi,
Andy Smith wrote:
> what I meant was that fdisk showed a single partition of
> 3.2TB size, while the entire disk being only the 400G
Then it's what i would expect from fdisk.
> I did try using fdisk on the destination to delete the partition and
> recreate it with the correct numbers, but the ext4 driver and fsck
> and other filesystem tools were still totally unable to work with
> it. Yet, a sha256sum of the disk image file at both sides showed the
> same value, so it is the same data.
I would also expect complaints about read attempts after the end of
the device.
> Is it actually possible to create an LVM volume that thinks it has 512b
> logical sectors, on an underlying device that is 4Kn?
Interesting question.
Googling for LVM instructions ... pvcreate(8), vgcreate(8), lvcreate(8).
Their man pages show no options for selecting block sizes.
losetup(8) has an option which looks helpful:
-b, --sector-size size
Set the logical sector size of the loop device in bytes (since Linux
4.14).
But that would be another software layer between filesystem and physical
device.
(losetup -b 4096 would possibly help to mount an image file from a disk
with logical block size 4K.)
Have a nice day :)
Thomas
