Re: Adaptec Storage Manager reports "No controllers were found in this system"
- From: Aragorn <aragorn@xxxxxxxxxxxxxxxxxxx>
- Date: Fri, 16 May 2008 23:20:49 +0200
Rob wrote:
Hello again,
I downloaded a newer ASM package, asm_linux_x64_v5_20_17414.rpm, off
the Adaptec site and got the Adaptec Storage Manager GUI to work
properly.
In my original post I had installed a much older version of the ASM
package asm-linux_v2.12_922.rpm. This package was "supposed" to work
with the 2230SLP card and the SuSE OS though. Aparently not : )
Glad you figured that one out by yourself then. ;-)
I'm still curious about the fact that the controller card is running
at 66Mhz though. I used to work for Silicon Graphics as a System
Support Engineer and I used to install a lot of SCSI and Fiber Channel
HBAs in their IX-Bricks. Depending on the model of card and whether
or not the neighbor slot was populated, the PCI-X card could run at
66Mhz, 100Mhz, or 133Mhz.
Yes, but 66 MHz is not PCI-X mode. That's the legacy PCI mode, which most
(but not all) PCI-X adapter cards support.
A good example would be putting two U320 cards in adjoing slots.
These cards would normally clock at 133Mhz each but since their paired
up on the same SHUB (Bus) chip they downclock to 100Mhz.
This is true only if the adapter card actually supports working at 100 MHz.
You have to keep in mind that if the card is forced to work at 100 MHz when
it is listed as normally working at 133 MHz, it would not function well
without that the manufacturer had taken the proper measures to ensure that
it does.
If the card were rated suitable for operation at 100 MHz, then it would have
been listed on Adaptec's website as PCI-X 133/100 MHz-capable. Yet it
isn't - I have a 2130-SLP myself, which is the single channel variant of
the card you have. It's listed as PCI-X 133 MHz or PCI 66 MHz.
Similarly, there are PCI-X cards that are geared for operation at 100 MHz,
so it would be a bad idea to plug them into a 133 MHz slot. You can
compare it to 3.3 Volt and 5 Volt PCI cards. Some cards are rated to work
at both voltages, while others are rated to work only at 3.3 Volt, and
others only at 5 Volt.
In addition, if you were to have a motherboard with two PCI-X slots on the
same bus, then putting a single PCI-X card in one of the slots while
leaving the other open would indeed run it at 133 MHz - provided that the
adapter card is rated for that speed - while plugging in a PCI-X card in
both slots would reduce their bus speed to 100 MHz, again, provided that
the adapter card is rated for that speed.
However, if you were to plug one PCI-X card into one of the slots and a
regular PCI card into the other slot, then *both* slots will operate at 66
MHz and at PCI specification, not PCI-X specification.
The only time I've seen a card clock at 66Mhz is because it's a legacy
card and didn't support a faster bus speed or the bus, in the case of an
older I-Brick, only supported 66Mhz.
PCI-X slots are backwards compatible with PCI - although not all PCI-X
*adapter* *cards* are backwards compatible! - so if you plug a PCI device
into a PCI-X slot, the slot will operate at PCI specification. PCI-X is
more than just PCI running at a higher bus speed. ;-)
There is ample documentation on the web about the latest PCI, PCI-X and PCIe
standards. Google is your friend and all that. ;-)
--
*Aragorn*
(registered GNU/Linux user #223157)
.
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