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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hi Peter,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>It ‘should’ work just fine, but Christian’s suggestions to work from a copy are quite reasonable.<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></a></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The latest simh code from github can be used to make this copy for you:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> sim> set rq2 rauser<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> sim> ! On Windows <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> sim> attach rq2 –fc raw Raw-Disk-Image.vhd \\.\PhysicalDrive1<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> sim> ! On Linux<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'> sim> attach rq2 –fc raw Raw-Disk-Image.vhd /dev/sdb<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Mark<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Simh [mailto:simh-bounces@trailing-edge.com] <b>On Behalf Of </b>Christian Brunschen<br><b>Sent:</b> Sunday, June 28, 2015 3:56 AM<br><b>To:</b> Peter Allan<br><b>Cc:</b> simh@trailing-edge.com<br><b>Subject:</b> Re: [Simh] Using an ODS-2 physical SCSI drive with simh<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>If you have the option to do so, I would suggest making a byte-by-byte dump of the contents of the drive (a disk image), and putting that disk image somewhere safe and read-only; then, use a copy of that disk image for any experimentation. That way you're firstly reducing any wear on the drive itself, only reading data from it, once; and you're not risking any damage to the data, since you're working on a copy of the original which is safely stored elsewhere, and you can always start over with a fresh copy of the original at any point.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Also, if your host computer is fairly modern, a disk image may actually be a lot faster to access than the original SCSI drive.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>// Christian<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 28 June 2015 at 11:38, Peter Allan <<a href="mailto:petermallan@gmail.com" target="_blank">petermallan@gmail.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal>I know that you can use a physical SCSI drive with simh by using the RAW device. However, before doing so, I want to check something.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The drive that I have is a 9GB SCSI drive that was formatted and written to on an Alpha workstation that runs VMS 7.2-1. The disk structure on the drive is ODS-2.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>My question is - will using the drive as a RAW drive in simh let me access the existing file structure on the disk? I want to use the vax (microVAX 3900) simulator.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is it safe to write to the drive or might that mangle the file structure?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Are there "gotchas" to watch out for, such as needing to tell simh the exact size of the drive?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>All comments gratefully received.<o:p></o:p></p></div><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'>Peter Allan<o:p></o:p></span></p></div></div><p class=MsoNormal><br>_______________________________________________<br>Simh mailing list<br><a href="mailto:Simh@trailing-edge.com">Simh@trailing-edge.com</a><br><a href="http://mailman.trailing-edge.com/mailman/listinfo/simh" target="_blank">http://mailman.trailing-edge.com/mailman/listinfo/simh</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>