Date: Sat, 25 Mar 2000 18:08:50 -0500 (EST) From: David Gilbert <dgilbert@velocet.ca> To: freebsd-current@freebsd.org, freebsd-scsi@freebsd.org Subject: MegaRAID jiggles clock? Message-ID: <14557.18178.239025.747850@trooper.velocet.net>
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I'm wondering if the AMI MegaRAID controller/driver might be the reason that I'm getting a large number of clock resets from ntpd. About every half hour, ntpd seems to feel the need to reset the clock on the server by about 1/3 of a second. The server has a moderate NFS load (going out through 12 dc interfaces) and an AMI MegaRAID 1400 controller with 8 disks in a RAID-5 config. I have other servers with 12 dc ports, and havn't seen any particularly bad time performance from them, which is why I'm suspicious of the megaraid. This machine is also using a motherboard common to many of our other machines. None of our other servers (we have a "ring" of 5 time servers to which all our internal hosts connect) or clients appear to have any issues. I have considered setting the option on ntpd to only adjust time by adjusting the frequency ... to see if this is just a bogon clock chip or somesuch. ideas? Dave. -- ============================================================================ |David Gilbert, Velocet Communications. | Two things can only be | |Mail: dgilbert@velocet.net | equal if and only if they | |http://www.velocet.net/~dgilbert | are precisely opposite. | =========================================================GLO================ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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