[Info-vax] Backup TK50 tapes

[supervinx]

Hi !
I'm facing this problem.
I have a bunch of TK50 original tapes and I want to create tape images, in order
to save data and use them into simh.

I have only a functional TK70 unit (VAX 4000/300), no SCSI units to 
connect elsewhere and use tapecopy/tapedd.

Many tapes are boot tapes, so I want to preserve their structure 
("normal tapes" containing only savesets are easily read and copied),
creating a bootable image.

BACKUP (OVMS 7.3) seems not to accept a tape unit as source, only as destination.
This prevents me to use BACKUP/IMA or /PHY from tape to another device/file
So:

1) May I create those images with the available hardware ?

2) How can I create if not a bit-by-bit copy a functionally equivalent one ?
 Will COPY/LOG from the TK70 to a simh virtual tape (I have a cluster handy) do this ?

Thanks !
-- 
http://www.supervinx.com/Retrocomputer