Hi @Tom-Elliott
Here’s the table comparison you asked for:
Win10 (23H2), SSSTC drive:
label: gpt, protective MBR
p1: start=2048 size=204800 EF00 EFI
p2: start=206848 size=32768 0C01 MSR
p3: start=239616 size=498573824 (237.7 GiB) 0700 Basic Data
p4: start=498813440 size=1304576 (637.0 MiB) 2700 WinRE
Free: 2157 sectors (1.1 MiB), no problems found
Win11 (25H2), Toshiba drive:
label: gpt, protective MBR
p1: start=2048 size=204800 EF00 EFI
p2: start=206848 size=32768 0C01 MSR
p3: start=239616 size=498344448 (237.6 GiB) 0700 Basic Data
p4: start=498584064 size=1533952 (749.0 MiB) 2700 WinRE
Free: 2157 sectors (1.1 MiB), no problems found
Type GUIDs, attributes, partition order, and start sectors for p1/p2/p3 are identical between both. The only difference is where the p3/p4 boundary falls — Win11’s WinRE partition is ~112MB larger, which just shifts that one boundary. No extra/hidden partitions, no reordering, no odd attributes on either side, no MBR anomaly (both show “protective” cleanly). I don’t see anything in the table itself that looks like a red flag.
Given how clean this diff is, I’m not expecting the bisection’s first step (sgdisk -Z, table-only) to change anything, but running it now anyway as instructed. Will report whether F2/Setup opens after that, and if not, move to zeroing the ESP start next.
Thanks