<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Segoe UI Emoji";
panose-1:2 11 5 2 4 2 4 2 2 3;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Going by the size of the disk image files, I believe there’s a mix. These are downloaded disk images I pulled (literally) years ago, DL0 seems to be RL01, while DL1 is RL02:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>5235200 Dec 21 2011 rt11dat.dsk<o:p></o:p></p><p class=MsoNormal>5235200 Feb 12 12:18 rt11run.dsk<o:p></o:p></p><p class=MsoNormal>10475520 May 10 2006 rtv53_rl.dsk<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The one I’m trying to initialize is rt11dat.dsk, it’s “empty”. The other two read/access just fine, but I’ve never tried to initialize them<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Startup cmd file is:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>SET CPU 1M<o:p></o:p></p><p class=MsoNormal>ATTACH RL0 rt11run.dsk<o:p></o:p></p><p class=MsoNormal>ATTACH RL1 rtv53_rl.dsk<o:p></o:p></p><p class=MsoNormal>ATTACH RL2 rt11dat.dsk<o:p></o:p></p><p class=MsoNormal>SET RL2 BADBLOCK<o:p></o:p></p><p class=MsoNormal>BOOT RL0<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I think that “BADBLOCK” option came from some suggestion way back, like I said, it’s been a long time since I touched this.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Simh <simh-bounces@trailing-edge.com> <b>On Behalf Of </b>Henk Gooijen<br><b>Sent:</b> Wednesday, February 12, 2020 2:27 PM<br><b>To:</b> simh@trailing-edge.com<br><b>Subject:</b> Re: [Simh] Initializing disks (triggered by the "Something Strange with RK05" chain<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=NL>See below …<o:p></o:p></span></p><p class=MsoNormal><span lang=NL><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span lang=NL>Van: </span></b><span lang=NL><a href="mailto:kjhall55@gmail.com">Ken Hall</a><br><b>Verzonden: </b>woensdag 12 februari 2020 18:30<br><b>Aan: </b><a href="mailto:simh@trailing-edge.com">simh@trailing-edge.com</a><br><b>Onderwerp: </b>[Simh] Initializing disks (triggered by the "Something Strange with RK05" chain<o:p></o:p></span></p></div><p class=MsoNormal><span lang=NL><o:p> </o:p></span></p><p class=MsoNormal>I’ve played with RT11 on and off over the years, but the one thing I’ve never been able to do is properly initialize an empty disk. If I create a DL2: for example, and try to run initialize on it, I get back:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>.dir dl2:<o:p></o:p></p><p class=MsoNormal>?DIR-F-Error reading directory<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>.init dl2:<o:p></o:p></p><p class=MsoNormal>DL2:/Initialize; Are you sure? YES<o:p></o:p></p><p class=MsoNormal>?DUP-F-Size function failed<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This seems similar to the issues Henk Gooijen has been having with RK05’s, and it’s been so long since I’ve dealt with the real hardware I don’t recall exactly how this is supposed to work, but it seems to me it should just “work”.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Has anyone found a solution to this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I can check that tomorrow. Maybe that is the reason you can download<o:p></o:p></p><p class=MsoNormal>an empty but initialized RL02 image (zipped) from DBIT.<o:p></o:p></p><p class=MsoNormal>If RT11 cannot figure out the size (5 MB or 10 MB / RL01 or RL02), maybe<o:p></o:p></p><p class=MsoNormal>the command (in SIMH) .SET RL0 RL02 helps. You specify that RL0 is an<br>RL02. Likewise, you can say .SET RL0 RL01. On a real PDP-11 with RL drives<br>the system will recognize what type RL01 or RL02 is connected/loaded.<br>You can have a mix of RL01 and RL02 drives on one RL11 controller.<o:p></o:p></p><p class=MsoNormal>The .SET RLx RL01 (or RL02) command is not of RT11, but of SIMH. Give it a try <span style='font-family:"Segoe UI Emoji",sans-serif'>😊</span> <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For the write protect command for the RK drives, this is probably also a<br>SIMH command. .SET RK0 WRITEENABLE *<b>is</b>* in SIMH (as is .SET RK0 LOCKED).<o:p></o:p></p><p class=MsoNormal><span lang=NL><o:p> </o:p></span></p></div></body></html>