On 2015-01-22 07:58 AM, Steve Shockley wrote:
On 1/21/2015 8:50 AM, Brent Cook wrote:
I think Dell used to have servers in its 'Cloud' line that fit 2
machines in 1U, though IIRC they were a little pricey. I couldn't find
them again when searching.
The C6100 was a 2U 4-server "cloud-dense" device, sort of like a 2U
blade chassis. I've considered getting one, but I'm not sure if I
could stand the reported noise. IIRC they have two power supplies per
chassis and the blades are individually removable, so that may or may
not meet your definition of redundancy. It looks like the C6220-II is
the current model, but I haven't looked at those since they're not
cheap on ebay.
I'm running a pair of redundant OpenBSD firewalls/routers on C6100
blades. I can confirm, having had to strip and repair one of mine, that
the only shared components common to all 4 slots are:
1. The metal shell
2. The fan control board
3. the SATA backplane, at least physically.
The backplane the blades plug into is split into (independent) top and
bottom halves.
The power distribution/sharing system is split into (1+1 redundant,
connected) top and bottom halves.
The SATA backplane, although shared, appears to be 99% passive and
signal traces appear to be highly localized; power is another story for
obvious reasons; a catastrophic failure in one SATA drive could
propagate to other drives, but would be fused at the power distribution
board(s).
It's inaccurate to characterize the 4 servers in a C6100 chassis as
**completely** indepedent, but I can confirm that you definitely can
pull and replace individual blades without affecting the others.
In my case, I have enough 6 other servers running at that site, so I can
put one router in each chassis, thus ensuring complete separation all
the way out to the ethernet switch and/or the shared UPS (take your pick).
--
-Adam Thompson
[email protected]
