Date: Tue, 17 Jan 2012 15:12:19 -0800 From: Chuck Swiger <cswiger@mac.com> To: Jeremy Chadwick <freebsd@jdc.parodius.com>, peter h <peter@hk.ipsec.se> Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: about thumper aka sun fire x4500 Message-ID: <668E1573-AD44-466A-BE94-AFE138E151CD@mac.com> In-Reply-To: <20120117220912.GA32330@icarus.home.lan> References: <201201171859.10812.peter@hk.ipsec.se> <20120117220912.GA32330@icarus.home.lan>
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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. A check of some old docs suggests: Hypertransport Sync Flood occurred on last boot: Uncorrectable ECC error caused the last reboot. Regards, -- -Chuck
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