[Asterisk-Users] Hot plug PCI?
steveu at coppice.org
Wed Mar 31 07:42:12 MST 2004
Scott Laird wrote:
> On Mar 31, 2004, at 12:01 AM, Nicolas Bougues wrote:
>> - hardware : you must have hotplug capable boards and bus. I believe
>> the only option there is CompactPCI, and of course cPCI boards and
>> chassis are very different from your day-to-day PCI stuff. Of course
>> Digium boards, as well as any other standard PCI board does not
>> cPCI boards and chassis are considerably more expensive than their
>> standard counterparts, if they exist at all.
>> You can't just hot (un)plug a standard PCI board : the bus is not
>> meant for this, you have most chances of destroying your board and/or
>> your bus.
> You can buy systems with hot-plugable standard PCI slots. Many
> higher-end servers have included the ability for years.
> If you read down far enough, it mentions that the PCI-X slots are
> hot-pluggable. Linux has kernel support for the HP/COMPAQ/IBM
> hot-plug chips, but I'm pretty sure that you still need a bit of
> driver support.
I haven't tried with a recent Compaq, but a couple of years ago the hot
plug slots were a joke. It was nearly impossible to swap a card without
disturbing the others in the chassis, and crashing the server. The cards
did not slide out cleanly; ribbon cables for RAID drives ran across the
top of the hot plug slots; etc. So, watch out - you need slots which are
hot plug in deed as well as in word :-)
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