DEC Pro hard drive formatter

Chris Zach cz at
Sat Jan 16 16:50:44 CST 2021

Nice! If you'd like to be the greatest hero today, can you send me an 
image of an RD52 or RD53 of the latest P/OS and I'll load it on one of 
my drives here? (Save me 30 floppies, please :-)

Did the images from Xhomer work?


On 1/16/2021 5:17 PM, Paul Koning wrote:
> I just tried what you suggested (with P/OS 3.0) on an MFM emulator empty RD52 image, and indeed that works just fine.
> Thanks Chris!
> 	paul
>> On Jan 14, 2021, at 1:25 PM, Chris Zach via cctalk <cctalk at> wrote:
>> Hm. I remember that POS 2.0 and above would just format the hard disk and go during the install. Likewise I don't know if you can have multiple hard disks in P/OS so that's a pain in the tail.
>> Boot from floppies and just init the raw disk.
>> C
>> On 1/14/2021 11:39 AM, Paul Koning via cctalk wrote:
>>> I'm wondering how to do hard drive formatting, which is likely to be needed when working with emulated disks in David Gesswein's MFM emulator.
>>> As far as I can tell, RT-11 can do this.  At least I have a source code printout for such a formatter.  But while I can find a hard drive image of RT V5 for Pro, I haven't found any floppy-bootable images.  And I think it's a bit tricky to create one.  I knew, long ago for V2...
>>> Any suggestions?  Any alternative sources for a formatter?  I guess I really should consider typing in the core of that formatter and adding it to RSTS.
>>> 	paul

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