Also, I've seen some try this by setting the BMC clock, but if the delta between the BMC and RTC is more than a few seconds, very strange things will happen. That's asking for trouble.
For Intel BMCs, the BIOS sets the BMC clock during POST according to the RTC, so setting the RTC is the root time anyway. However you set the RTC, you would need a software agent on the target system to do it remotely. Andy -----Original Message----- From: Corey Minyard [mailto:miny...@acm.org] Sent: Tuesday, April 07, 2009 5:08 PM To: Geoff Nordli Cc: ipmitool-devel@lists.sourceforge.net Subject: Re: [Ipmitool-devel] setting RTC via IPMI Geoff Nordli wrote: > > I am trying to figure out a way to set the RTC (BIOS) time remotely > without using NTP. > > > > I can set the BMC clock using IPMI. > > > > Does anyone know of a way to set the RTC from the BMC clock? > Well, maybe, but not in a general case. Some systems put the RTC on an I2C bus. If it happens to be on an I2C bus that the BMC is also on, you could use the "Master Read-Write Command" of IPMI to perform the I2C operation. The exact operation is chip-specific, of course. Most PCs put it on the ISA bus, so it's not possible in that case. In my experience, trying to find out if this is even the case is almost impossible. There's usually 2 people on the planet that know (or knew) the information and it's almost impossible to find who they are and if you do they've forgotten. You could try to write some software that scanned the I2C bus, but that is not completely reliable and I really don't know how to do that. -corey ------------------------------------------------------------------------ ------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Ipmitool-devel mailing list Ipmitool-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ipmitool-devel The information contained in this document is CONFIDENTIAL and property of Kontron. Any unauthorized review, use, disclosure or distribution is prohibited without express written consent of Kontron. If you are not the intended recipient, please contact the sender and destroy all copies of the original message and enclosed attachments. ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Ipmitool-devel mailing list Ipmitool-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ipmitool-devel
