os2-wireless_users@2rosenthals.com ?????????????? ????? #5443 ??????? ??????? ?????

???: "Lewis G Rosenthal" <os2-wireless_users@2rosenthals.com> ?? ????
?????????
???: "OS/2 Wireless Users Mailing List" <os2-wireless_users@2rosenthals.com>
??: Re: [OS2Wireless] Dopey on-off switch (was: Re: [OS2Wireless] Terminology)
??: Thu, 27 Dec 2007 19:14:57 -0500
??: "OS/2 Wireless Users Mailing List" <os2-wireless_users@2rosenthals.com>

On 12/27/07 06:15 pm, Mark Henigan thus wrote :
Hello Lewis:

I was under the impression that turning off
the radio via the wireless "widget" was just
as effective as a hardware switch.  I know
that when I turn off my Cisco 350 PCMCIA card
the "Plug'n'Play for PCMCIA" applet shows the
card as turned off and the lights no longer
flash on the card.  Is it different with the
internal and/or newer cards?

Not necessarily with the mPCI cards, Mark, as they are not (AFAIK) hot pluggable. Thus, it is impossible to actually power down the slot from software. I thought that the hardware switch did this, but thinking on it now, it probably isn't so, as there still wouldn't be a way to recognize the slot upon power up without a PCI hot plug driver. So, essentially, all the switch must do (and XWLAN, for that matter) is tell the card to shut off its radio. This consumes less power and shouldn't allow any broadcasting, but it's not the same as telling Plug'n'Play for PCMCIA to power down a slot. That actually does cut the flow of power (the card should actually cool down, except for the heat generated from inside the machine).

At least that's the way I believe it works. In servers, we actually do have hot plug PCI, so I can, for example, pull a Proliant server out of a data cabinet on its drawer glides, open the case with the unit still running, press a button to release a plugged in card (which will cut power to it, avoiding any chance of short circuiting the slot), pull the card, swap in a new one, and power the slot back up. It's pretty neat, and when swapping SCSI cards for tape drives and such, does save a lot of time and hassle, particularly with OSes which self-tune over time (like NetWare), where I absolutely hate the thought of bringing down a server which has been running for five or six months and has just reached a really sweet spot.

--
Lewis
------------------------------------------------------------
Lewis G Rosenthal, CNA, CLP, CLE
Rosenthal & Rosenthal, LLC
Accountants / Network Consultants
 New York / Northern Virginia           www.2rosenthals.com
eComStation Consultants                  www.ecomstation.com
Novell Users Int'l       www.novell.com/openenterpriseserver
Need a managed Wi-Fi hotspot?               www.hautspot.com
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