9 Mar
2007
9 Mar
'07
8:16 p.m.
Ethan Dicks wrote:
On 3/9/07, Richard <legalize at xmission.com>
wrote:
No, please, you know way more about 'em than me. I've never run
these, although they were running till the day before I took them. I
uncabled them on the datacenter floor, and they've been stored gently
since. I picked up only because there were machines in the lot that I
did want.
If you google "technical specifications DEC 7000" there's a pretty
detailed description of the laserbus/XMI scheme out there in pdf.
In article <45F21FCE.8070603 at mdrconsult.com>,
Doc Shipley <doc at mdrconsult.com> writes:
I should probably let Doc chime in here, but I can't resist... it's
the CPU/memory bus used in late-model DEC VAXen like the VAX 6000
line. One stuffs a few CPUs, some memory, perhaps some network or
cluster controllers and maybe a VAXBI cage or two on the XMI bus and
you have a fully-loaded VAX 6xxx (where the exact model number is a
product of the number and speed/variety of the CPUs). If I remember
correctly, one may stuff up to 6 CPUs on the XMI bus, which is limited
to a smallish number of total slots), but if one wants to max out the
memory and have other peripherals in there, it might not be possible
to have all 6 CPUs loaded. Is there any interest here in DEC XMI gear?
I haven't the foggiest idea what XMI gear is :-) Interesting stuff, if you want to run a VAX the size
of a
refrigerator. The last one I saw in the wild was a few years ago, but
there are quite a few in hobbyist hands. Someone (here?) has
described how to run one off of either single-phase or US 220VAC, but
they shipped from DEC with 3-phase power, IIRC.
The floor cabinet models are 3-phase, but the rackmount system unit
and the RM XMI crate are both 200-240VAC single-phase. The standard
plug is a NEMA 6-15, so I'd guess it's not pulling more than 10A-12A peak.
http://h18000.www1.hp.com/products/quickspecs/SOC/QB0013PF.PDF
A whole system, including processor, XMI cage, and a half-dozen
BA350s, will fit in a full-height rack.
Doc