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</head><body text="#000000">Thanks gents - that info makes my life easier!<br>
<br>
I was flashing back to when we were configuring an E4K at work and going
through the gymnastics of interleaving. <br>
<br>
Steve<br>
<span>
</span><br>
<blockquote type="cite"
cite="mid:ac22b307-f13b-48f7-a1d6-b92c9c4df3e8@ember.systems"
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<a style="color:#485664
!important;padding-right:6px;font-weight:500;text-decoration:none
!important;" href="mailto:rescue@sunhelp.org" moz-do-not-send="true">Ethan
Hawke via rescue</a></div> <div
style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:
right;"> <font color="#909AA4"><span style="padding-left:6px">December
11, 2025 at 8:29\u202fPM</span></font></div> </div></div>
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<br>
<br>That's correct, each bank on a CPU board must be the same, but there
is
no other requirement. You can also run a CPU board with no RAM at all.
<br>
<br>You only need to match banks to enable memory interleaving for
enhanced
performance. However enabling memory interleaving disables the ability
to DR (remove) a CPU board while Solaris is running.
<br>
<br>Ethan
<br>
<br>
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<a style="color:#485664
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!important;" href="mailto:pat@vax11.net" moz-do-not-send="true">Patrick
Finnegan</a></div> <div
style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:
right;"> <font color="#909AA4"><span style="padding-left:6px">December
11, 2025 at 7:51\u202fPM</span></font></div> </div></div>
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style="color:#909AA4;margin-left:24px;margin-right:24px;"><meta
http-equiv="Content-Type" content="text/html; charset=utf-8"><div
dir="auto"><div>You don't need to match memory (or cpus) on different
boards. They do have to match in the same bank but I think that's all. </div><div><br></div><div
data-smartmail="gmail_signature">Patrick Finnegan</div></div><br><div
class="gmail_quote gmail_quote_container"><div dir="ltr"
class="gmail_attr">On Thu, Dec 11, 2025, 19:41 Steve Hatle via rescue
<<a href="mailto:rescue@sunhelp.org" moz-do-not-send="true">rescue@sunhelp.org</a>>
wrote:<br></div></div>
</div>
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<a style="color:#485664
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!important;" href="mailto:steve.hatle@gmail.com" moz-do-not-send="true">Steve
Hatle</a></div> <div
style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:
right;"> <font color="#909AA4"><span style="padding-left:6px">December
11, 2025 at 7:40\u202fPM</span></font></div> </div></div>
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style="color:#909AA4;margin-left:24px;margin-right:24px;">It's been a
while and I'm trying to remember the rules for RAM in the
E3000 with multiple CPU boards.
<br>
<br>I have three CPU boards but the RAM I have on hand (some 32MB and
some
128MB SIMMs) aren't enough to fill bank 0 across all three boards.
<br>
<br>I could fill bank 0 across two boards, and fill bank 1 across two
boards, but can I run the third CPU board with no RAM in it, or does at
least bank 1 have to have RAM? I assume that bank 0 on the third board
would have to be the same size as what's in bank 1 of board 1 and 2.
<br>
<br>To put it another way, I have 16 128M sticks, so I can fill bank 0
of
boards 1 and 2, and I have 16 32MB sticks, so I can do the second bank
of boards 1 and 2, but I don't have enough of either to also fill bank 0
of board 3. Can board 3 function without RAM in it, or do I have to fill
at least all of bank 0 across all three boards?
<br>
<br>I've been looking through various Sun doc and I can't (yet) find a
definite answer. My gut tells me I have to cross all three boards with
at least bank 0.
<br>
<br>Anyone have some cheap SIMMs? Or maybe I should just be happy with
two
boards and not try to pimp up a machine that is more a labor of love
than anything else :-)
<br>
<br>Thanks,
<br>
<br>Steve
<br>
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