Fdisk output:
"Device Start End Sectors Size Type
/dev/mmcblk1p1 2048 62333918 62331871 29.7G Linux filesystem
Disk /dev/mapper/sailfish-root: 2.5 GiB, 2621440000 bytes, 5120000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/sailfish-home: 17.6 GiB, 18849202176 bytes, 36814848 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/luks-60c02ae6-f85d-407d-8607-ed5ea90488a4: 17.6 GiB, 18847105024 bytes, 36810752 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes"
So the partition is encrypted with LUKS v1.
“sailfish-root” is too small to be system.
Awkward but there doesn’t seem to be any choice. A utility to regularly back up ‘home’ would be awesome. Seems rsync can do it connected to a Unix machine.
It even looks borderline impossible to get rid of the encryption, because I don’t particularly want the annoying security features either.
I even used the TWRP version of XA2 (via fastboot) but still no prompt for my PIN.