Re: Floppy rescue: media separation from hub

2017-09-08 Thread Peter Corlett via cctalk
On Fri, Sep 08, 2017 at 12:46:02PM -0700, Chuck Guzis via cctalk wrote: [...] > This is particularly true if you use a whole-track reader than can read > tracks without regard to index. > I don't know about Amiga, however. The Amiga's native disk format assumes whole-track reads and writes

Re: Floppy rescue: media separation from hub

2017-09-08 Thread Sam O'nella via cctalk
An uninteresting answer but is this proprietary data or something another collector may have and could provide?  null

Re: Floppy rescue: media separation from hub

2017-09-08 Thread Chuck Guzis via cctalk
On 09/08/2017 01:42 PM, Fred Cisin wrote: > "Normal" "simple" PC-type read, such as > COPY source destinat > CAN have a big problem. If you put the bub back on, so that index is > right in the middle of a sector, then that sector can't be read (with > NEC-type FDC, unless you "mask-off" the

Re: DIY crude digital alignment disk (Was: Floppy rescue: media separation from hub

2017-09-08 Thread Fred Cisin via cctalk
One more concern: Be very careful centering it! If the cookie is off-center, relative to the hub, then tracks won't be in the right positions. 3.5" disks are 135 tracks per inch, so an imperfection of 1/5 mm is more than an entire track space! Actually, that could be VERY useful! On a

Re: Floppy rescue: media separation from hub

2017-09-08 Thread Fred Cisin via cctalk
On Fri, 8 Sep 2017, Chuck Guzis via cctalk wrote: Yes, they were glued. Sometimes you can look carefully at the hub and the cookie and match up remaining glue deposits. In the case of a simple PC-type read, the position of the index doesn't really matter for reading--as long as the sector

Re: Floppy rescue: media separation from hub

2017-09-08 Thread Chuck Guzis via cctalk
On 09/08/2017 11:51 AM, John Foust via cctalk wrote: > > When attemping to read an old Amiga floppy, the magnetic media > separated from the metal hub. Were these originally glued? > > Assuming I can find a way to re-affix the media to the hub, how many > guesses as to the proper alignment

Re: Floppy rescue: media separation from hub

2017-09-08 Thread Fred Cisin via cctalk
On Fri, 8 Sep 2017, John Foust via cctalk wrote: When attemping to read an old Amiga floppy, the magnetic media separated from the metal hub. Were these originally glued? Assuming I can find a way to re-affix the media to the hub, how many guesses as to the proper alignment might I need to

Floppy rescue: media separation from hub

2017-09-08 Thread John Foust via cctalk
When attemping to read an old Amiga floppy, the magnetic media separated from the metal hub. Were these originally glued? Assuming I can find a way to re-affix the media to the hub, how many guesses as to the proper alignment might I need to make? After all, the metal hub has an index slot