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 [email protected] > On 25 Jan 2018, at 6:04:06 PM, [email protected] wrote: > > Message: 3 > Date: Thu, 25 Jan 2018 18:01:41 -0800 > From: Zane Healy <[email protected] <mailto:[email protected]>> > To: Dennis Boone <[email protected] <mailto:[email protected]>> > Cc: simh <[email protected] <mailto:[email protected]>> > Subject: Re: [Simh] VAX Tape Emulation? > Message-ID: <[email protected] > <mailto:[email protected]>> > Content-Type: text/plain; charset=utf-8 > > >> On Jan 25, 2018, at 2:22 PM, Dennis Boone <[email protected] >> <mailto:[email protected]>> 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
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