I know I've hacked larger SCSI disks in the past, for the 3100. I made them report a smaller size so that they would boot.
On Thu, 25 Jan 2018 19:35:24 -0700 khandy21yo <khandy2...@gmail.com> wrote: > The MicroVAX 3100 had a bug in the boot Rom that limited it to a > 1.06? Disk. I don't know if it also occurred on other systems. > > > Sent from my Galaxy Tab® A > -------- Original message --------From: Larry Baker <ba...@usgs.gov> > Date: 1/25/18 7:17 PM (GMT-07:00) To: heal...@avanthar.com Cc: SIMH > <simh@trailing-edge.com> Subject: Re: [Simh] Simh Digest, Vol 168, > Issue 38 We ran into this on a real VAX when we added a 20GB SCSI > disk, as I recall. Either VAX/VMS or the hardware (I think it was > VAX/VMS) only looks at the low-order 24 bits of the disk size. So, > our 20GB disk was viewed as a 3+GB drive on the VAX. Alpha/VMS has > no problem handling larger drives. I think I've used 100GB drives on > an Alpha. I know I have a 72GB and a 50GB drive on our Alpha now. > > Larry Baker > US Geological Survey > 650-329-5608 > ba...@usgs.gov > > > > > > > On 25 Jan 2018, at 6:04:06 PM, simh-requ...@trailing-edge.com wrote: > Message: 3 > Date: Thu, 25 Jan 2018 18:01:41 -0800 > From: Zane Healy <heal...@avanthar.com> > To: Dennis Boone <d...@msu.edu> > Cc: simh <simh@trailing-edge.com> > Subject: Re: [Simh] VAX Tape Emulation? > Message-ID: <fb0095e0-4ec6-46ca-aeeb-52eee3152...@avanthar.com> > Content-Type: text/plain; charset=utf-8 > > > On Jan 25, 2018, at 2:22 PM, Dennis Boone <d...@msu.edu> wrote: > > If you're venturing into unix technology, it's possible to mount nfs > shares on the VMS machines. Then you can use BACKUP to write save > sets onto the nfs share. There seems to be some care needed with ADF > metadata. Multinet seems to write this to a hidden file or > subdirectory; not sure what UCX/TCPIP do. > > I actually looked into this option around 2008 (for the same Alpha). > If I remember correctly I ran into a problem on the VMS side of the > file size limit (I have the same disk size now I had in 2008). This > can work, but you have to break larger disks up into chunks. I?m > hoping to avoid that, with the solution I?m looking at. > > Zane > _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
