| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 989.1 | | KONING::KONING | Paul Koning, A-13683 | Thu Jun 10 1993 10:37 | 3 |
| No. DECconcentrator-500 does not support hot swap.
pauyl
|
| 989.2 | no hotswap in a DC500 | ASDS::LEVY | | Thu Jun 10 1993 10:38 | 3 |
| No. The DC500 was not designed for supporting hotswap. If a customer is
looking for increased availability, consider recommending a dual-homed
configuration.
|
| 989.3 | Hub-based products ? | LARVAE::HARVEY | Baldly going into the unknown... | Mon Jun 14 1993 08:30 | 6 |
| Presumably the future hub 900 FDDI options will be "hot-swoppable" as per
current hub modules.....
Is the requirement for an exisiting customer or future procurement ?
Rog
|
| 989.4 | | KONING::KONING | Paul Koning, A-13683 | Mon Jun 14 1993 10:17 | 3 |
| Re Hub FDDI modules: yes.
paul
|
| 989.5 | Disaster tolerant | BRAT::BUKOWSKI | | Mon Jun 21 1993 11:46 | 14 |
| Speaking of hot swapable:
Are these HUB 900 series boards going to be complete hotswapable, or
are they like that DECnis box which only has hot-insertion, and even
that require a slot power down.
It would be awsome if the HUB had the features of the GIGAswitch. Now
that is great. Totally hot swapable boards (all of them), hotswapable
fan trays, hotswapable power supplies, totally redundant power
supplies, autoselect 50-60Hertz and 120-240v. This is the first
DEC box that I really like.
A gigaswitch owner,
Mike
|
| 989.6 | DECHub 900 has the switch's hotswap features -- and more | LEVERS::MELARAGNI | | Mon Jun 21 1993 12:39 | 24 |
| The 900 has hotswap-able modules like the switch. To remove a module, you must
lift a handle that powers the module down. When the module is powered down, it
can be removed. The switch on the handle doesn't actually switch the power but
rather tells the backplane-integrated management card that the card in slot
(whatever) wishes to be powered down. When it is safe to do so, the management
agent commands the module to power down.
On insertion the process is similar. The card in slot (whatever) requests power
from the management agent that will then grant the module permission to power
up when it is appropriate to do so. If, for example, you only have one power
supply plugged into the hub and you plug in more modules than that one supply
can handle, the management card will power up only those modules that will not
violate the power supply's max output. I'm not sure the GIGAswitch has this
level of sophistication.
I don't know the details of how the power supplies are hot-swapped into the
system.
The management card that controls the hot swapping (among many other things) is
fully integrated into the DECHub 900's backplane. There is an LCD display
that is visible to the user that gives continuous updates of the modules and
power supplies plugged into the backplane.
bill
|