<div dir="ltr"><div>Thanks Dave, you knew where I was headed with this.</div><div>Appreciate the feedback</div><div>J</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 27, 2023 at 6:39\u202fPM Dave McGuire via rescue <<a href="mailto:rescue@sunhelp.org">rescue@sunhelp.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
This question wasn't directed at me, but I'll endorse it. I'm <br>
currently running ZuluSCSI boards in several SPARCstations, two PDP-11s, <br>
and several VAXen. (PDP-11s and VAXen via SCSI host adapters that speak <br>
MSCP)<br>
<br>
-Dave<br>
<br>
On 7/27/23 18:29, John Hudak via rescue wrote:<br>
> Interesting information. TY. I am considering getting a ZuluSCSI board <br>
> since the SCSI2SD v5 is NLA. Do you endorse it?<br>
> Thanks<br>
> J<br>
> <br>
> <br>
> On Thu, Jul 27, 2023 at 4:01\u202fPM vom513 via rescue <<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a> <br>
> <mailto:<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a>>> wrote:<br>
> <br>
> <br>
> > On Jul 27, 2023, at 12:54 PM, Jonathan Sturges via rescue<br>
> <<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a> <mailto:<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a>>> wrote:<br>
> ><br>
> > Hi,<br>
> > Nice summary, your understanding is correct. Some small additions:<br>
> ><br>
> > * Some OSes -- Solaris2, I'm fairly sure, maybe later SunOS? --<br>
> the SCSI drivers can issue the block size change command when the OS<br>
> is running (or are able to handle the 2k block size).<br>
> > * OBP 3.x can issue the block change command too, IIRC; it's<br>
> really OPB 2.x and prior that have the hard requirement of a<br>
> 512-byte block requirement for booting.<br>
> > * Besides Plextor, most Panasonic, Toshiba and Pioneer drives<br>
> have jumperable block sizes.<br>
> <br>
> Thanks for the reply/confirmation.<br>
> <br>
> I did a bit more experimentation with the ZuluSCI and figured I\u2019d<br>
> post my results to the list to benefit any future folks who might be<br>
> looking for this type of info.<br>
> <br>
> - CD6.iso : Zulu log shows it coming up in 2048-byte mode, but my<br>
> sun4c/m machines boot fine from it. I don\u2019t see a MODE SELECT in<br>
> the log - I guess the ZS is just operating in \u201csoft\u201d block mode and<br>
> honoring whatever request comes in ? (This is great by the way - not<br>
> looking a gift horse in the mouth)<br>
> <br>
> - CD6_512.iso : Block size specified as 512. Works as expected.<br>
> <br>
> - CD6_2048.iso : Block size specified as 2048. Machines will NOT boot.<br>
> <br>
> So it seems like _<BLOCKSIZE> is a \u201chard\u201d setting. Omitting this<br>
> seems to run the device in \u201csoft\u201d mode (hard/soft just my personal<br>
> terminology for this behavior).<br>
> _______________________________________________<br>
> rescue list - <a href="http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org" rel="noreferrer" target="_blank">http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org</a><br>
> <<a href="http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org" rel="noreferrer" target="_blank">http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org</a>><br>
> <br>
> <br>
> _______________________________________________<br>
> rescue list - <a href="http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org" rel="noreferrer" target="_blank">http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org</a><br>
<br>
-- <br>
Dave McGuire, AK4HZ<br>
New Kensington, PA<br>
<br>
<br>
_______________________________________________<br>
rescue list - <a href="http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org" rel="noreferrer" target="_blank">http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org</a><br>
</blockquote></div>