From: "Digest" To: "OS/2GenAu Digest" Date: Fri, 1 Mar 2002 01:00:00 +1100 (EDT) Subject: [os2genau_digest] No. 284 Reply-To: Date:- 1 March 2002 1================================================ From: "Ian Manners" Date: Wed, 27 Feb 2002 02:48:39 +1100 (EDT) Subject: Re: [os2genau] Leave on or off? Hi Jim You didnt per chance have relatives in Kalgoorlie did you ? >3) If electronic equipment is designed for normal power fluctuations >(i.e. at least allowing for +- 15% on voltage levels for 200 msec >duration, and +-7% sustained) then the occasional blip from a high >powered motor starting surge shouldn't worry it in the least. Induction >motors are particularly vulnerable to sustained low voltages (say -10% >for more than 5 minutes), but most fans or other small motors are pretty >resistant to voltgae fluctuations or well isolated from mains >fluctuations by the power supply circuitry. All true but remember that most PC fans are of the sleeveless variety, the bigger problem is friction. Once a "modern" PC switch mode power supply looses its air flow, it will last from a few hours to a few months depending on load, and placement of other fans in the box. >4) Modern PC power supplies typically use self regulating high >frequency inverter circuits that are quite insensitive to voltage >fluctuations. The better ones tolerate anything in the range 105V to >260V without even raising a sweat - or at worst require a simple change >to tolerate a choice of ranges centered on something like 100V and 230V. Thank goodness (from a servicing side), one gets a bit tired of explaining to people they cant claim a PS under warranty because its obvious someone put the voltage switch in the 110v position. >I have never seen an incident of mains-power-induced damage I've only seen one here in Melbourne, but then I'm from Kalgoorlie, its amazing what you can run off gen sets :-)) On the other hand, I've seen some good mains power induced damage in the Goldfields but then I havent seen things like large Jaw Crushers and SAG Mill's starting up around here on the scale of some of the mine sites. I remember when Mt Charlotte dipped the power grid out in Kalgoorlie after a very rare full site shutdown, blew a lot of lights out around Kalgoorlie-Boulder, Then again, its amazing what modern power supplies will survive with, only to go from a dry joint, leaky cap etc. PC's are very accepting of supply fluctuations, they survive on some very square and triangular looking wave forms coming from UPS's. Monitors however, are a lot more fickle about what they get. One other thing I've noticed since being in Melbourne, the mains voltage over here is very stable around 240-243 volts. Western Australia, its around 245-265 volts. That, combined with the heat, and dust, I'm sure also lead to an overall shorter equipment life. Cheers Ian B Manners http://www.os2site dot com/ 2============================================== Date: Wed, 27 Feb 2002 09:44:50 From: Voytek Eymont Subject: Re: [os2genau] Leave on or off? ** Reply to note from Jim Boyle Tue, 26 Feb 2002 21:38:58 +1000 > My machines typically run 24*7 - and my monitors are "Energy Star > compliant" the monitors/BIOSs with 'ESC' logos: is that in the hardware/firmware ? does that works with OS/2, or, requires a compliant video driver ? Voytek Eymont SBT Information Systems Pty Ltd http://www.sbt dot net dot au/links/ phone +61-2 9310-1144 fax +61-2 9310-1118 3============================================== Date: Wed, 27 Feb 2002 18:31:00 +1100 From: Peter Subject: [os2genau] WarpUp CD & Hard Drives > 8.4Gb Greetings, I know the WarpUp CD & 8.4Gb hard drives info has been mentioned many times before. But during those times, i thought i'll look into it later when i'm really interested. Well, now i'm interested in WarpUp coz i want to install OS/2 Warp 4 on a pc with a 30Gb hard drive. But is WarpUp a standalone OS/2 installation from which the installation disks are made so as to eliminate the need for all the updated install disks, idedasd.exe, etc if installing the old Warp 4? Btw, i also have Fixpak 14. I have Windows ME & Windows 98 on 2 c: drives using Systems Commander. Reason i have both Windows is in case one plays up, i can use the other. Need i say more? I've often read that to install OS/2 on a large drive, it needs to be under the 1023 cylinder limit which is about at the 4Gb mark. But what if i want to put OS/2 on a logical drive some 10Gb above the 2 Windows? And finally, Prism Data Works seems to be the only place from where WarpUp can be purchased. Is this so? Thanks to those who might respond. Peter