I have been mucking around (with Winhex) on some hard drives & USB pens manually repairing FAT & NTFS boot sectors from back up, zeroing sector 0 & manually redoing the partiton info in the MBR Templates, recovering from diskpart & the clean command (not clean all ) etc just for fun & to understand more.

I have a 64Gb USB3 pen which works fines, no issues at all.
Thought I'd look at the sector 0 & NTFS boot sectors with winhex but found that sector 0 was the NTFS boot sector & not the MBR?
Im use to seeing sector 0 with MBR or zero'd out but with 55AA at the end.

As you can see from the pics








Loki

That's the "superfloppy format" - no MBR, the PBS starts at sector 0.

Thank you Vulcan for your reply
Something else for me to learn & research


Loki

Think that the partition style showing Master Boot Record throw me as I then expected an MBR




Loki

You're very welcome, Loki


I see what you mean. Good old Windows

I have seen a case (Akai MPC2000) which had both a BIOS Parameter Block and an MBR style partition table in sector 0. The information in the partition table pointed to sector 0 as the location of the boot sector. The drive was not intended to be bootable. In fact IIRC the first JUMP instruction was a JMP 00, so that would result in an endless loop.

_________________
A backup a day keeps DR away.

Here it is:
http://www.users.on.net/~fzabkar/MPC2000_mbr.txt



The drive has been divided into 26 FAT partitions. Their starting sectors are recorded as little endian double words beginning at offset 0x40.

0x00000000
0x00053919
0x000A7232
...
0x00829371

_________________
A backup a day keeps DR away.