This isn't quite right. Windows does use GMT (it might be UTC, but I think it is GMT). The confusion comes from two things: Some Windows users don't set the timezone right, and this makes the hardware clock wrong. Some RTCs are broken, especially old 386 based systems. The trick of getting the local time from the RTC is to work around broken RTCs.
-----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Rob van der Heij Sent: Thursday, April 27, 2006 5:35 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Problem with RMFPMS and the recent time change On 4/28/06, Alan Altmark <[EMAIL PROTECTED]> wrote: > But it's important to remember that the TOD doesn't have an intrinsic > timezone. Linux has been told to *assume* the TOD is set to UTC, and > since a virtual TOD is set from the LPAR TOD, the machine must be set to > UTC. Note that the Linux system clock itself runs at UTC. The thing with the "hardware clock UTC" is because of Windows in dual-boot configurations. Because Windows programs the RTC in local time, the Linux kernel and hwclock have some ugly tricks to allow Linux to pick up the local time from the hardware clock (as set by Windows) and compute UTC out of that again (just like CP does when you change the clock at IPL). The other amusing difference is that Linux uses the system clock now and then to correct the drift of the cheap RTC chip, where Windows uses that cheap drifting RTC clock to correct for the cases where its system clock failed to tick properly :-) And now we have this clear, should we run UTC or GMT ? -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
