[linux-minidisc] Differences between 1GB HiMD and Standard MD in HiMD-Format

[manner.moe@gmx.de]

Hello,
as you know, i am testing scsi support for libhimd with libusal.
I successfully implemented "allow/prevent removal", "himd format",
 "get disc id",  "get time" and "set time" yet.
While testing "himd format" and "get disc id" i have found some 
differences betwenn 1GB HiMDs and standard MDs in 
HiMD-Format(tested on TDK 80min).
All tests are made on "blanc discs" (freshly formatted) using
MZ-RH1 and MZ-NH1.

1.  1GB HiMDs have a fixed disc id. It doesn´t change.
2.  "himd format" scsi command doesn´t work on 1GB
     HiMDs. libusal returns error: incompatible medium installed
     I think formatting this type on MD can be done using
     "all track erase" only.
3.  disc ids on standard MDs changes every time the MD is 
     inserted. So if i eject a MD and reload the same MD both disc ids
     will change (the one we get from mclistxx.hma file and the one 
     we can read per scsi command) but both are the same.
     (on blanc discs, as i wrote above)
4.  sending "himd format" command to Standard MD will only change
     the disc id we can read per scsi command. the disc id in mclistxx.hma
     doesn´t change. On reloading both ids are updated to a completely new
     disc id.

HiMDs are marked as "no track", Standard MDs are marked as "blanc disc"
after initializing with SonicStage or formatting with HiMD-Portie.
(Format doesn´t work on HiMDs with Portie itself, too, only "track erase" 
works)
 
Thomas