Can all registered uses please login, even just for a few minutes..
It helps build a picture where our "good traffic" is coming from..
Thanks :)

RPi Pico HDD (WIP) case

Blogs & guides and tales of woo by forum members.
User avatar
alexh
Site sponsor
Site sponsor
Posts: 1371
Joined: Tue Oct 17, 2017 4:51 pm
Location: Oxfordshire

Re: RPi Pico HDD (WIP) case

Post by alexh »

The Megafile is totally impractical as a HDD today. It only supports MFM/RLL drives (and it's very picky about which ones). You can't replace the drive because no one makes them, not even adapters for other protocols. It's only purpose is to recover an existing Megafile drive. You'd be mad to store anything of any significance on one today (and if you've got any data on one not backed up you'd be mad not to back up ASAP)
Senior Principal ASIC Engineer - SystemVerilog, VHDL
Thalion Webshrine - http://thalion.atari.org
ST,STf,STfm,STe,MegaST,MegaSTe,Falcon060
A500+,A600,A4000/060,CD32,CDTV
User avatar
chronicthehedgehog
Site sponsor
Site sponsor
Posts: 384
Joined: Sun May 08, 2022 6:11 pm
Location: The Midlands
Contact:

Re: RPi Pico HDD (WIP) case

Post by chronicthehedgehog »

alexh wrote: Mon Jul 03, 2023 7:08 am The Megafile is totally impractical as a HDD today. It only supports MFM/RLL drives (and it's very picky about which ones). You can't replace the drive because no one makes them, not even adapters for other protocols. It's only purpose is to recover an existing Megafile drive. You'd be mad to store anything of any significance on one today (and if you've got any data on one not backed up you'd be mad not to back up up ASAP)
I think that's a solid argument for replacing its innards and maintaining that Atari look
User avatar
alexh
Site sponsor
Site sponsor
Posts: 1371
Joined: Tue Oct 17, 2017 4:51 pm
Location: Oxfordshire

Re: RPi Pico HDD (WIP) case

Post by alexh »

I've found that there are industrial MFM drive replacements available that *might* work in the Megafile. They retail around the $300 mark.

https://www.drem.info/buy
https://decromancer.ca/mfm-emulator/
http://www.pdp8online.com/mfm/
Senior Principal ASIC Engineer - SystemVerilog, VHDL
Thalion Webshrine - http://thalion.atari.org
ST,STf,STfm,STe,MegaST,MegaSTe,Falcon060
A500+,A600,A4000/060,CD32,CDTV
User avatar
mrbombermillzy
Moderator
Moderator
Posts: 2378
Joined: Sun Jun 03, 2018 7:37 pm

Re: RPi Pico HDD (WIP) case

Post by mrbombermillzy »

alexh wrote: Mon Jul 03, 2023 7:08 am The Megafile is totally impractical as a HDD today. It only supports MFM/RLL drives (and it's very picky about which ones). You can't replace the drive because no one makes them, not even adapters for other protocols. It's only purpose is to recover an existing Megafile drive. You'd be mad to store anything of any significance on one today (and if you've got any data on one not backed up you'd be mad not to back up ASAP)
We may all be mad here for using failing/obsolete machines that could die at any minute. Nevertheless, we will still use them. ;)

Anyway, IIRC, (at least in the Megafile I had) dont the internals have a convoluted ACSI>SCSI interface, which then interfaces to another board with the MFM/RLL inerface, then the actual drive?

If I have remebered it correctly, the chain can be severed at the SCSI board and a modern SCSI drive implementation can be used (possibly SCSI2SD or BluSCSI). That would make it a far more practical proposition.

If you dont want to hang on till October @alexh , send me the internals and I will test. I can pay for any postage and whatever you want for the bits if you like?

Ironically, that would be easier for me to run than my 2 Satandisk drives that need to have a nonstandard 9v miniUSB connector PSU, which I cant seem to find or buy online. :lol:
User avatar
alexh
Site sponsor
Site sponsor
Posts: 1371
Joined: Tue Oct 17, 2017 4:51 pm
Location: Oxfordshire

Re: RPi Pico HDD (WIP) case

Post by alexh »

mrbombermillzy wrote: Mon Jul 03, 2023 1:54 pm dont the internals have a convoluted ACSI>SCSI interface, which then interfaces to another board with the MFM/RLL inerface, then the actual drive?
Not in mine. It's a single board that connects directly to the MFM/RLL drive. I think you're thinking of the Megafile 44. Megafile 20 and 30 I *think* are just ACSI->MFM/RLL
mrbombermillzy wrote: Mon Jul 03, 2023 1:54 pm If you dont want to hang on till October @alexh , send me the internals and I will test.
Thanks but I'm not concerned if it works or doesn't work.
Senior Principal ASIC Engineer - SystemVerilog, VHDL
Thalion Webshrine - http://thalion.atari.org
ST,STf,STfm,STe,MegaST,MegaSTe,Falcon060
A500+,A600,A4000/060,CD32,CDTV
User avatar
mrbombermillzy
Moderator
Moderator
Posts: 2378
Joined: Sun Jun 03, 2018 7:37 pm

Re: RPi Pico HDD (WIP) case

Post by mrbombermillzy »

alexh wrote: Mon Jul 03, 2023 2:28 pm Thanks but I'm not concerned if it works or doesn't work.
Well, I was actually offering to buy the internals from you, rather than you deciding to bin them, unless you want to keep hold, then that's fine. :D
Post Reply

Return to “MEMBER BLOGS”