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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!yarrina.connect.com.au!munnari.OZ.AU!news.ecn.uoknor.edu!fizban.solace.mh.se!paladin.american.edu!europa.chnt.gtegsc.com!gatech!newsfeed.internetmci.com!quanta.com!rsww From: rsww@quanta.com (Ross S. W. Walker) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Problems with File System Panics Date: 10 Nov 1995 09:00:05 GMT Organization: Quanta Communications, Inc. Lines: 50 Message-ID: <47v4al$nvd@tempis.quanta.com> References: <47j8io$9e3@molokini.conterra.com> <47qurk$6gb@helena.MT.net> NNTP-Posting-Host: quanta.quanta.com X-Newsreader: TIN [version 1.2 PL2] Nate Williams (nate@trout.sri.MT.net) wrote: : In article <47j8io$9e3@molokini.conterra.com>, : Jeff McElroy <jeff@conterra.com> wrote: : > : >I have a FreeBSD machine panicing every few hours w/ INN under heavy : >load. : > : >All panics have been in file system code, usually on the thread of a : >ufs_lookup. Drives are Seagate 4GB SCSI Barracuda with Adaptec 2940 : >running at first 2.0.5 and then 7/16 snap. : > : >I have tried a number of solutions to no avail. I am now thinking I : >may be getting corruption on writes to the Seagate. Anyone have : >any similar experiences? : I've seen lots of similar experiences with Cuda's on heavily loaded : systems. The first thing to check is your termination. This is almost : *always* the cause for problems. Both ends (and only the ends) need to : be properly terminated and you need to have decent cables. : Next, the Barracuda's are *notorious* for over-heating. Supposedly the : newer versions are fixed in this regard, but all of the older ones are : subject to disk corruption when they get warm. Make sure they are not : mounted internally and that they have proper air-flow to keep them cool. : If you can't leave your pinky on them for more than 10 seconds, they are : too warm. I had the same problem on the news server with the same configuration! My fix, I upgraded to a more recent snap 2.1-?? and the problems mysteriously disappeared. Well it's not that mysterious since some more big improvements where made to the 2940 driver code. Well the 4GB Barracuda has been spooling news now for a little over a month uptime without a hitch. I even have the min free and inode size decreased to 2048K and 0% free and under that load it still holds up. The Barracudas are known to have some bad quality control so it COULD be the drive. Other manufacturers are known to be worse though (Seagate), so it's a lose-lose proposition either way, the cost of cheap storage these days. Cheers, Ross Walker -- ------------------------------------------------------------------------------ | /\/ | Ross S. W. Walker (rsww@quanta.com) | \/\ | | | |\ | finger rsww@quanta.com for PGP key _____________________________ | |___|/ | | Quanta Communications, Inc. ------------------------------------------------------------------------------