Date: Wed, 18 Jan 2012 03:07:56 +0000 From: Marcus Reid <marcus@blazingdot.com> To: Chuck Swiger <cswiger@mac.com> Cc: FreeBSD Stable <freebsd-stable@freebsd.org>, peter h <peter@hk.ipsec.se>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: about thumper aka sun fire x4500 Message-ID: <20120118030756.GA35508@blazingdot.com> In-Reply-To: <668E1573-AD44-466A-BE94-AFE138E151CD@mac.com> References: <201201171859.10812.peter@hk.ipsec.se> <20120117220912.GA32330@icarus.home.lan> <668E1573-AD44-466A-BE94-AFE138E151CD@mac.com>
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On Tue, Jan 17, 2012 at 03:12:19PM -0800, Chuck Swiger wrote: > On Jan 17, 2012, at 2:09 PM, Jeremy Chadwick wrote: > > I do not have one of these boxes / am not familiar with them, but > > HyperTransport is an AMD thing. The concept is that it's a bus that > > interconnects different pieces of a system to the CPU (and thus the > > memory bus). > > While that was a nice picture, it's not related to the bus > architecture of a Sun 4500. :-) > > An X or E 4500 is a highly fault-tolerant parallel minicomputer with 8 > slots-- one was I/O, and you could put up to 7 CPU boards with dual > UltraSPARC processors-- you could hot-plug CPU boards and memory in > the event of a failure and keep the rest of the system up. They cost > a significant fraction of a million dollars circa y2k. You're thinking E4500, which is as you describe. The X4500 is described here: http://en.wikipedia.org/wiki/Sun_Fire_X4500 Marcus
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