PCW 3.5" disk format

[fuzzweed]

Hello all - first post, new explorer...
Quick summary.
I have a PCW with a 3.5" TEAC drive B" with the SCA adapter board.
I have a PC with CPCdisk

After much back and forth what I can do:
Use the PCW B: drive as expected, read, write, format
Take a 3.5" disk from the PCW and image it to .dsk in the PC with CPCdisk.
Write that image back to another floppy disk and the PCW recognises it, and reads it just like the original.
From this I am presuming the properties / drive alignment etc between the two physical drives (PCW and PC) are in good shape.

What I need help with is making new disks on the PC that I can use to transfer files to the PCW.
If I try new disk, add files the PCW - depending on format - either gives 'wrong format', or gives a directory listing but wont read files, or hangs completely and needs to be rebooted.
The same is true if I take a working .dsk image and try adding files to that.

When a disk from the PCW is imaged CPC disk reports it as ROMDOS D1 - but doesn't list the individual files, so I wonder if its reporting the format incorrectly.

The formats I have tried to write with are ROMDOS D1, PCW 80 track 68 entries and PCW 80 track 128 entries. As above, all seem to fail with various error.

Any thoughts / advice?

[fuzzweed]

Figured it out. It uses Spectrum+3 format.

[andycadley]

Figured it out. It uses Spectrum+3 format.

I think, strictly speaking, the Spectrum +3 uses the PCW format, since the PCW came first. Although I can imagine some tools may label it the wrong way.

[fuzzweed]

 yes of course chronologically you are correct, but in terms of searching for compatible disk utilities a spectrum search is more forthcoming