HDD problems causing Kernel panics in Linux/Debian?
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From: Ant on 10 Mar 2010 10:10 On 3/9/2010 9:07 AM PT, Rod Speed typed: >>> On the other hand, the serial interface is simple, so console >>> output, including error messages, will still be written to it. >>> If you need that output, connect a different computer to >>> the serial port, activate the serial console and capture >>> its output. I have done this a number of times, mostly to >>> try out experimental kernels on a cluster, but also to debug >>> kernel panics. > >> Can I use my old serial external dial-up modem for this? > > Nope, you need a serial cable between the PCs. > > It would be a lot better if Linux allowed a dump to a USB stick if > you are happy to risk the contents of the USB stick on a kernal panic. Yes, I have no problems with a USB flash drive/stick. I can reformat. ;) -- "I love ants. Do they have uncles? Ha Ha!" --Elmo from Sesame Street (unknown episode) /\___/\ / /\ /\ \ Phil./Ant @ http://antfarm.ma.cx (Personal Web Site) | |o o| | Ant's Quality Foraged Links: http://aqfl.net \ _ / Nuke ANT from e-mail address: philpi(a)earthlink.netANT ( ) or ANTant(a)zimage.com Ant is currently not listening to any songs on his home computer.
From: Vlad_Inhaler on 10 Mar 2010 13:03
On Mar 9, 7:14 pm, Arno <m...(a)privacy.net> wrote: > In comp.sys.ibm.pc.hardware.storage Vlad_Inhaler <andrew.willi...(a)t-online.de> wrote: > > > > > And Linux can do it. It just dumps to console instead of disk and > this choice is resonable because fo data safety, albeit sometimes > inconvenient in cheap setups. (Nothing against cheap setups, but > they are a bit limited on the hardware side and that sometimes is > inconvenient.) > > You are supposed to have more than one of these boxes in one place > and then there is no issue. You can also use a number of > serial-over-internet devices to record logs. Or a laptop with > serial interface placed next to the offending machine. Or a modem. > Or a serial data recorder, for example the Logomatic v2 Serial > SD Datalogger (-> Google), which costs about 50 EUR. > > The cheapest solution is usually just a serial crossover cable to > the next box in the rack that is under your control. Remember > that this is a sercer OS we are talking about here, not an > MS single-user-no-network OS that has over the course of time > been heavily extended. > > Side note: With server PC hardware you get an IPMI console that > also gives you the output, so the comparison with big iron is not > fair. The serial console is the low-low-cost solution. > > I should also add that a "soft panic" (which is closest to a blue > screen) typically dumps to /var/log/messages. It is only a hard panic > that is limited to the console. A hard panic corresponds to a lockup > without blue screen on windows. > > Arno > > -- > Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: a...(a)wagner.name > GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F > ---- > Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans Nah, the NT family was designed to be on a network from the very start. When you say 'single-user-no-network' you are talking about 3.1. Even the Win95/98/ME line was expecting to be hooked up although the network support was just an add-on. I will have to take the time next week to study this area (dumping over serial interfaces). Of course, then I need to be able to understand the dump :-( Yousuf Khan's comment about how Solaris does it was very interesting. My day-job is on mainframes (not IBM) and when you boot one of them, they always ask if you want a dump of the previous session. That would be rather annoying here but it is a good starting point. Dumping after a previous crash landing would be useful, at least as an option which could be turned on in some way. |