Date: Sun, 05 Jun 2011 23:31:29 +0300 From: Kaya Saman <kayasaman@gmail.com> To: perryh@pluto.rain.com Cc: freebsd-questions@freebsd.org Subject: Re: Strange system lockups - kernel saying disk error Message-ID: <4DEBE7A1.4070508@gmail.com> In-Reply-To: <4dead25e.dVwQb8YCMs0X59f/%perryh@pluto.rain.com> References: <4DE8CF13.1040304@gmail.com> <4de9679b.AE3DPW9jNqVtiL2D%perryh@pluto.rain.com> <4DE9E44E.3080707@gmail.com> <4dead25e.dVwQb8YCMs0X59f/%perryh@pluto.rain.com>
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On 06/05/2011 03:48 AM, perryh@pluto.rain.com wrote: > Kaya Saman<kayasaman@gmail.com> wrote: > > >>> Did you apply any updates shortly before it started to fail? >>> >> No updates! I did however, install unrar through ports. >> > Intuitively, that seems unlikely to have triggered the problem. > This doesn't sound like an issue to me either as it wouldn't touch the kernel or any modules. > >> I remember on other boards that went on me in the past with >> capacitor issues, a bunch of orange stuff starts leaking out >> of them when they blow up. >> > A leaking capacitor has surely gone bad, but the syndrome I'm > thinking of is more subtle. The top of the can, which should > be flat, bulges upward a little bit. > > Whether replacing bad capacitors qualifies as "quick" depends > on how comfortable you are using a soldering iron. It does > generally require taking the board out of the case, which may > or may not be "quick" or "easy" depending on the case design. > I have a degree in Electronic Engineering :-) - though no soldering iron :-( > >> Also the chassis doesn't have any cooling fans either since it was >> bought extremely cheaply by the family member but not sure that's >> the culprit neither power problems as the system has run in high >> outside ambient temps in the past with no A/C in the room and also >> was working fine on the PSU installed with the 4 disks. >> > Fans that were never there can't have suddenly failed :) > Odd that isn't it :-P > Power supplies do fail occasionally, and not always in obvious > ways such as failing to turn on at all. The output voltages may > be a little too high or too low, or they may be correct but with > excessive ripple or electrical noise; or the supply may be just > fine until a disk draws a current spike to move the arm rapidly. > This needs either a voltmeter or oscilloscope to check out the voltages, fluctuations, and ripple. None of those at home :-( ....<man what I am I doing with 2 racks and no tools to fix things???> > It might be worth checking the fan mounted on the CPU heatsink if > there is one, and the fan in the power supply (which ventilates the > case as well as the power supply itself). > CPU fan works - at least it spins, fan in PSU not checked as I'd need to open it as it's a PS/2 design if not mistaken! But all these tips would be useful for a system that was given more value then mine. If I had actually paid for the system and it been quite advanced it would definitely be worth taking everything into account. Regards, Kaya
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