Right... latest installment. I set boot to CSM , with USB as 1st boot up option, plugged in USB HDD, exitted BIOS (with save changes) & behold peppermint booted normally. Everything appeared to work, it wanted the wireless router password to connect to the internet, everthing else looked normal. I created a file in Liber office & saved it in home directory to see if, on next boot, it remained saved. Shut down normally. removed usb cable. Re-attached USB cable & switched on - went straight jail. As previously a black commandline style screen with:
Intel UNDI, PXE-2.1(Build 083)
Realtek PC1eFE family controller series v1.27 (10/31/11)
PXE-E61: MEDIA TEST FAILURE, check cable
PXE-MOF: exitting PXE ROM
No available boot device.. insert boot disk & press any key
I think it won't boot to the internal HDD as 2nd boot option because Win 10 won't boot from CSM boot.
I messed about switching CSM boot to UFEI trying again then swtiching back but, usually got the above blerb or Win 10.
I couldn't try a different cable as i don't have a spare, but i don't think this is the problem.
However on one occasion got the Peppermint loadscreen background & 4 options about which O/S to boot to but by the time i'd read everthing i was just in time to see the default counter hit 0 to load Peppermint GNU. Which then came up with the following:
[4.948744] sd 2:0:0:0: [sdb] no caching mode page found
[4.948791] sd 2:0:0:0: [sdb] assuming drive cache : write through scanning for btrfs file systems
/dev/sdb1 (load bar and increasing No% which ended with following message) contains a file system with errors, check forced.
Entry 'system-privte- (long string of numbers & letters)-rtkit-daemon.service-E40T1p in/var/tmp (1350454) has an incorrect filetype (was 2, should be 1).
/dev/sdb1:UNEXPECTED INCONSISTENCY ; RUN fsck MANUALLY ( ie without -a and -p options)
fsck exited with status code 4.
the root system on /dev/sdb1 requires a maual fsck
Busybox v1.22.1 (Ubuntu 1:1.22.0-15 Ubuntu) built-in shell (ash)
enter 'help' for list of built-in commands.
So, what now ? (I'm tempted by a length of rope