Re: [gentoo-user] Emergency shutdown, how to?
On Fri, 04 Apr 2008 13:06:04 -0400 Steven Lembark [EMAIL PROTECTED] wrote: Main thing that speeds up the AMD box is using 320MB scsi's for near-term storage. They are hugely faster than [S]ATA or IDE used on most equipment these days. what R/W speeds can you expect? -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Main thing that speeds up the AMD box is using 320MB scsi's for near-term storage. They are hugely faster than [S]ATA or IDE used on most equipment these days. what R/W speeds can you expect? Operations on SCSI run 2-3 times faster for large-ish file transfers (say 1MB or more). For example GIMP runs without noticeable pauses on most operations with my 2GHz opteron using the SCSI's as storage and scratch space; on the same machine with the SATA's it bogs down to the point of annoyance, with things like saves taking seconds to complete. The only difference being which drives I'm using for tiles and data. Bonnie gets upset validating the scsi space on this box since it has 8GB of core and I don't have 16GB free on the device so I can't give you any specific numbers. -- Steven Lembark85-09 90th St. Workhorse Computing Woodhaven, NY, 11421 [EMAIL PROTECTED] +1 888 359 3508 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Dale wrote: Steven Lembark wrote: Well, this one takes longer. Just the foldingathome takes about 20 seconds or more to shutdown. It can take over 60 seconds at times. That service for some reason has to completely shutdown before the others start to shutdown. The others will shutdown in parallel like I have set up. Then there is all the other services that have to stop. Quite literally, I only had seconds to shutdown since the P/S was stinking like a skunk. I just needed to umnount the file systems and power off as fast as possible. I didn't want to just pull the plug but I needed a shutdown that fast. Hackint the shutdowns to background the shutdown op and return is usually pretty simple -- don't know why more app's don't do that by default. 'halt' will get you down with little typing if you want to bypass the init scripts; so will kill -TERM 1. Add a 'sync' before either of them and you'll probably be able to come up with minimal trouble. What's the difference between halt command and shutdown? I thought they were basically the same thing. Also, in case you missed it. I have a service, foldingathome, that takes a while to stop and no other service can be stopped in parallel with this one. That is one of my key sticking points with the shutdown. Most of the others are pretty fast. I just needed the quickest *clean* shutdown I could get. Thanks I have four FAH jobs running on my compute server. I can kill -TERM fah6 in about 0.70 sec here, they start up again and just keep going. FAH is pretty robust when it comes to restarts; again if you crash the proc's then it won't be any worse than the outcome of loosing power: FAH will have to pick up its pieces and keep going. At least with halt -f you'll get the kernel space cleaned up. Halt will stop the O/S (see note from manpage, below). In this case a 'halt -f' would get the system down about as quickly as possible without just hitting the reset button. NOTES Under older sysvinit releases , reboot and halt should never be called directly. From release 2.74 on halt and reboot invoke shutdown(8) if the system is not in runlevel 0 or 6. This means that if halt or reboot cannot find out the current runlevel (for example, when /var/run/utmp hasn't been initialized correctly) shutdown will be called, which might not be what you want. Use the -f flag if you want to do a hard halt or reboot. -- Steven Lembark85-09 90th St. Workhorse Computing Woodhaven, NY, 11421 [EMAIL PROTECTED] +1 888 359 3508 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
In most cases you'll find that 'shutdown -h now' takes only a few seconds. you must have nice hardware :) He must have. I have a AMD 2500+ CPU with 1Gb of ram. It's not the slowest but not the fastest either. Pair of dual-PIII VA Linux machines, one compute server with twin dual-core opterons. Main thing that speeds up the AMD box is using 320MB scsi's for near-term storage. They are hugely faster than [S]ATA or IDE used on most equipment these days. -- Steven Lembark85-09 90th St. Workhorse Computing Woodhaven, NY, 11421 [EMAIL PROTECTED] +1 888 359 3508 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Steven Lembark wrote: I have four FAH jobs running on my compute server. I can kill -TERM fah6 in about 0.70 sec here, they start up again and just keep going. FAH is pretty robust when it comes to restarts; again if you crash the proc's then it won't be any worse than the outcome of loosing power: FAH will have to pick up its pieces and keep going. At least with halt -f you'll get the kernel space cleaned up. Halt will stop the O/S (see note from manpage, below). In this case a 'halt -f' would get the system down about as quickly as possible without just hitting the reset button. NOTES Under older sysvinit releases , reboot and halt should never be called directly. From release 2.74 on halt and reboot invoke shutdown(8) if the system is not in runlevel 0 or 6. This means that if halt or reboot cannot find out the current runlevel (for example, when /var/run/utmp hasn't been initialized correctly) shutdown will be called, which might not be what you want. Use the -f flag if you want to do a hard halt or reboot. I see your point on stopping FAH. Here, when I do a regular stop, it has a 17 second wait, can be 60 seconds depending on what it is doing at the time. That is if it is called by /etc/init.d/zzfah stop. I didn't have time to type in a lot of commands at the point my P/S was stinking my room up. You are also correct that FAH is very robust. It writes its restart point every 3 minutes on this rig so the most it will loose is about 3 minutes. I have only lost data with FAH once. I did test the halt -f command last night. I must say, it was fast. It was literally a few seconds, very few. I did have one file system that was . . . well . . . a little upset. I use reiserfs and after a fsck, everything was fine. I also learned to add the -p option to that command. The halt -f command but did not power off my system. I learned a lot with this ordeal. One thing is that the P/S's protection circuit must have worked very well. My mobo is doing just fine so no damage outside of the P/S itself. I also learned that the halt -f -p command should be really fast if this happens again. Keep those thoughts coming. Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
I learned a lot with this ordeal. One thing is that the P/S's protection circuit must have worked very well. My mobo is doing just fine so no damage outside of the P/S itself. I also learned that the halt -f -p command should be really fast if this happens again. Keep those thoughts coming. poweroff -f; NAME halt, reboot, poweroff - stop the system. SYNOPSIS /sbin/halt [-n] [-w] [-d] [-f] [-i] [-p] [-h] /sbin/reboot [-n] [-w] [-d] [-f] [-i] [-k] /sbin/poweroff [-n] [-w] [-d] [-f] [-i] [-h] -- Steven Lembark85-09 90th St. Workhorse Computing Woodhaven, NY, 11421 [EMAIL PROTECTED] +1 888 359 3508 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Basically, this is not intended to be used to shutdown a puter on a regular basis, unless you burn out P/S's on a daily basis. O-o Just didn't want someone to be using this on a regular basis and then wondering why their system has a new nickname, FUBAR. :'( In most cases you'll find that 'shutdown -h now' takes only a few seconds. If you're typing againsed the clock and don't to it every day then the SysReq tecnhique is somewhat error prone. In most cases the stuff that can't handle a crash tends to live at higher runlevels anyway and gets stopped when you exit rl 3; stuff that gets started at boot time are more likely service daemons that can easily handle a reset. Even if your shutdown croaks halfway through the stuff, chances are that got shut down first was the most fragile anyway (e.g., databases that had to flush cache) and you got whatever you could cleaned up however fast you could do it and you live with the rest on restart. -- Steven Lembark +1 888 359 3508 Workhorse Computing 85-09 90th St [EMAIL PROTECTED] Woodhaven, NY 11421 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Steven Lembark wrote: Basically, this is not intended to be used to shutdown a puter on a regular basis, unless you burn out P/S's on a daily basis. O-o Just didn't want someone to be using this on a regular basis and then wondering why their system has a new nickname, FUBAR. :'( In most cases you'll find that 'shutdown -h now' takes only a few seconds. If you're typing againsed the clock and don't to it every day then the SysReq tecnhique is somewhat error prone. In most cases the stuff that can't handle a crash tends to live at higher runlevels anyway and gets stopped when you exit rl 3; stuff that gets started at boot time are more likely service daemons that can easily handle a reset. Even if your shutdown croaks halfway through the stuff, chances are that got shut down first was the most fragile anyway (e.g., databases that had to flush cache) and you got whatever you could cleaned up however fast you could do it and you live with the rest on restart. Well, this one takes longer. Just the foldingathome takes about 20 seconds or more to shutdown. It can take over 60 seconds at times. That service for some reason has to completely shutdown before the others start to shutdown. The others will shutdown in parallel like I have set up. Then there is all the other services that have to stop. Quite literally, I only had seconds to shutdown since the P/S was stinking like a skunk. I just needed to umnount the file systems and power off as fast as possible. I didn't want to just pull the plug but I needed a shutdown that fast. Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Well, this one takes longer. Just the foldingathome takes about 20 seconds or more to shutdown. It can take over 60 seconds at times. That service for some reason has to completely shutdown before the others start to shutdown. The others will shutdown in parallel like I have set up. Then there is all the other services that have to stop. Quite literally, I only had seconds to shutdown since the P/S was stinking like a skunk. I just needed to umnount the file systems and power off as fast as possible. I didn't want to just pull the plug but I needed a shutdown that fast. Hackint the shutdowns to background the shutdown op and return is usually pretty simple -- don't know why more app's don't do that by default. 'halt' will get you down with little typing if you want to bypass the init scripts; so will kill -TERM 1. Add a 'sync' before either of them and you'll probably be able to come up with minimal trouble. -- Steven Lembark +1 888 359 3508 Workhorse Computing 85-09 90th St [EMAIL PROTECTED] Woodhaven, NY 11421 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Thu, 2008-04-03 at 12:10 -0400, Steven Lembark wrote: In most cases you'll find that 'shutdown -h now' takes only a few seconds. you must have nice hardware :) -- Iain Buchanan iaindb at netspace dot net dot au flannister, n.: The plastic yoke that holds a six-pack of beer together. -- Sniglets, Rich Hall Friends -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Steven Lembark wrote: Well, this one takes longer. Just the foldingathome takes about 20 seconds or more to shutdown. It can take over 60 seconds at times. That service for some reason has to completely shutdown before the others start to shutdown. The others will shutdown in parallel like I have set up. Then there is all the other services that have to stop. Quite literally, I only had seconds to shutdown since the P/S was stinking like a skunk. I just needed to umnount the file systems and power off as fast as possible. I didn't want to just pull the plug but I needed a shutdown that fast. Hackint the shutdowns to background the shutdown op and return is usually pretty simple -- don't know why more app's don't do that by default. 'halt' will get you down with little typing if you want to bypass the init scripts; so will kill -TERM 1. Add a 'sync' before either of them and you'll probably be able to come up with minimal trouble. What's the difference between halt command and shutdown? I thought they were basically the same thing. Also, in case you missed it. I have a service, foldingathome, that takes a while to stop and no other service can be stopped in parallel with this one. That is one of my key sticking points with the shutdown. Most of the others are pretty fast. I just needed the quickest *clean* shutdown I could get. Thanks Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Iain Buchanan wrote: On Thu, 2008-04-03 at 12:10 -0400, Steven Lembark wrote: In most cases you'll find that 'shutdown -h now' takes only a few seconds. you must have nice hardware :) He must have. I have a AMD 2500+ CPU with 1Gb of ram. It's not the slowest but not the fastest either. Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Fri, Mar 28, 2008 at 10:07 AM, Dale [EMAIL PROTECTED] wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Since I wanted to shutdown instead of reboot, it would be ALT + SysRq + S + U + O then correct? Are there any potential harms to the hardware / system in case one tends to abuse (i.e. use more often than necessary) of this command? It's so often so tempting to shut down your system fast. Liviu -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Am Mittwoch, 2. April 2008 schrieb ext Michael Schmarck: Dirk Heinrichs [EMAIL PROTECTED] wrote: Am Mittwoch, 2. April 2008 schrieb ext Michael Schmarck: You're not shutting down the system in a clean way. You're not? I thought that's the purpose of the whole thing? It's more like pulling the plug, isn't it? At least none of the shutdown scripts is run. And if you don't run ALT + SysRq + U, or if it just doesn't work (like hangs at some (remote) fs), But nobody proposed _not_ to run ALT + SysRq + U, Neil even proposed ALT + SysRq + EISUB, to be sure everything is killed, sync'd and unmounted. filesystems aren't even unmounted and thus dirty and thus need a fsck run on next boot. XFS to the rescue :-) Bye... Dirk -- Dirk Heinrichs | Tel: +49 (0)162 234 3408 Configuration Manager | Fax: +49 (0)211 47068 111 Capgemini Deutschland | Mail: [EMAIL PROTECTED] Wanheimerstraße 68 | Web: http://www.capgemini.com D-40468 Düsseldorf | ICQ#: 110037733 GPG Public Key C2E467BB | Keyserver: www.keyserver.net signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Emergency shutdown, how to?
On Wed, Apr 2, 2008 at 7:28 AM, Dirk Heinrichs [EMAIL PROTECTED] wrote: But nobody proposed _not_ to run ALT + SysRq + U, Neil even proposed ALT + SysRq + EISUB, to be sure everything is killed, sync'd and unmounted. There is actually a Wikipedia page that recommended remembering the word BUSIER and then executing it backwards: ALT+SysRq+REISUB - Mark -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Wed, 2 Apr 2008 16:28:29 +0200, Dirk Heinrichs wrote: But nobody proposed _not_ to run ALT + SysRq + U, Neil even proposed ALT + SysRq + EISUB, to be sure everything is killed, sync'd and unmounted. Just don't try to do E or I over an SSH connection. It kills the SSH daemon and you can't reboot the box. You can guess how I learned that one :( -- Neil Bothwick Windows Error #02: Multitasking attempted. System confused. signature.asc Description: PGP signature
Re: [gentoo-user] Emergency shutdown, how to?
Liviu Andronic wrote: On Fri, Mar 28, 2008 at 10:07 AM, Dale [EMAIL PROTECTED] wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Since I wanted to shutdown instead of reboot, it would be ALT + SysRq + S + U + O then correct? Are there any potential harms to the hardware / system in case one tends to abuse (i.e. use more often than necessary) of this command? It's so often so tempting to shut down your system fast. Short of a serious emergency (e.g., UPS with 30-sec lag and no input power) stick with 'shutdown -fh now'. The main problem is that you bypass the stop phase of all the app's started up via init.d; very little short of just hitting the reset switch or yanking the power. -- Steven Lembark +1 888 359 3508 Workhorse Computing 85-09 90th St [EMAIL PROTECTED] Woodhaven, NY 11421 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Mittwoch, 2. April 2008, Steven Lembark wrote: Liviu Andronic wrote: On Fri, Mar 28, 2008 at 10:07 AM, Dale [EMAIL PROTECTED] wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Since I wanted to shutdown instead of reboot, it would be ALT + SysRq + S + U + O then correct? Are there any potential harms to the hardware / system in case one tends to abuse (i.e. use more often than necessary) of this command? It's so often so tempting to shut down your system fast. Short of a serious emergency (e.g., UPS with 30-sec lag and no input power) stick with 'shutdown -fh now'. The main problem is that you bypass the stop phase of all the app's started up via init.d; very little short of just hitting the reset switch or yanking the power. if you do it the right way, start with 'e' and 'i', all apps are cleanly terminated/killed. So if an app does not quit cleanly, it is broken. The correct sequence is: e,i,u,b/o and it is absolutly save. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Volker Armin Hemmann wrote: On Mittwoch, 2. April 2008, Steven Lembark wrote: Liviu Andronic wrote: On Fri, Mar 28, 2008 at 10:07 AM, Dale [EMAIL PROTECTED] wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Since I wanted to shutdown instead of reboot, it would be ALT + SysRq + S + U + O then correct? Are there any potential harms to the hardware / system in case one tends to abuse (i.e. use more often than necessary) of this command? It's so often so tempting to shut down your system fast. Short of a serious emergency (e.g., UPS with 30-sec lag and no input power) stick with 'shutdown -fh now'. The main problem is that you bypass the stop phase of all the app's started up via init.d; very little short of just hitting the reset switch or yanking the power. if you do it the right way, start with 'e' and 'i', all apps are cleanly terminated/killed. So if an app does not quit cleanly, it is broken. The correct sequence is: e,i,u,b/o and it is absolutly save. Folks, keep in mind why I asked this question in the first place. My power supply was frying and I needed a VERY fast shutdown. This was not asked as a fast way to shutdown just because we are impatient or something. This was for the event of a serious emergency where I needed a shutdown in just a very few seconds not a minute or two. Some of my services take a while to stop, foldingathome being the longest one. Basically, this is not intended to be used to shutdown a puter on a regular basis, unless you burn out P/S's on a daily basis. O-o Just didn't want someone to be using this on a regular basis and then wondering why their system has a new nickname, FUBAR. :'( Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Wed, Apr 2, 2008 at 12:19 PM, Dale [EMAIL PROTECTED] wrote: Volker Armin Hemmann wrote: On Mittwoch, 2. April 2008, Steven Lembark wrote: Liviu Andronic wrote: On Fri, Mar 28, 2008 at 10:07 AM, Dale [EMAIL PROTECTED] wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Since I wanted to shutdown instead of reboot, it would be ALT + SysRq + S + U + O then correct? Are there any potential harms to the hardware / system in case one tends to abuse (i.e. use more often than necessary) of this command? It's so often so tempting to shut down your system fast. Short of a serious emergency (e.g., UPS with 30-sec lag and no input power) stick with 'shutdown -fh now'. The main problem is that you bypass the stop phase of all the app's started up via init.d; very little short of just hitting the reset switch or yanking the power. if you do it the right way, start with 'e' and 'i', all apps are cleanly terminated/killed. So if an app does not quit cleanly, it is broken. The correct sequence is: e,i,u,b/o and it is absolutly save. Folks, keep in mind why I asked this question in the first place. My power supply was frying and I needed a VERY fast shutdown. This was not asked as a fast way to shutdown just because we are impatient or something. This was for the event of a serious emergency where I needed a shutdown in just a very few seconds not a minute or two. Some of my services take a while to stop, foldingathome being the longest one. Basically, this is not intended to be used to shutdown a puter on a regular basis, unless you burn out P/S's on a daily basis. O-o Just didn't want someone to be using this on a regular basis and then wondering why their system has a new nickname, FUBAR. :'( Dale :-) :-) Understood. I think it sort of morphed into something more general, like what to do when the rest of us run into the occasional problem we all run into. Yesterday our MythTV backend server crashed 4 times. It hung completely killing X, etc. and I was in need of a good way to bring the machine down. I found this topic both timely and helpful, at least for future problems. Cheers, Mark -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Mittwoch, 2. April 2008, Dale wrote: Volker Armin Hemmann wrote: On Mittwoch, 2. April 2008, Steven Lembark wrote: Liviu Andronic wrote: On Fri, Mar 28, 2008 at 10:07 AM, Dale [EMAIL PROTECTED] wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Since I wanted to shutdown instead of reboot, it would be ALT + SysRq + S + U + O then correct? Are there any potential harms to the hardware / system in case one tends to abuse (i.e. use more often than necessary) of this command? It's so often so tempting to shut down your system fast. Short of a serious emergency (e.g., UPS with 30-sec lag and no input power) stick with 'shutdown -fh now'. The main problem is that you bypass the stop phase of all the app's started up via init.d; very little short of just hitting the reset switch or yanking the power. if you do it the right way, start with 'e' and 'i', all apps are cleanly terminated/killed. So if an app does not quit cleanly, it is broken. The correct sequence is: e,i,u,b/o and it is absolutly save. Folks, keep in mind why I asked this question in the first place. My power supply was frying and I needed a VERY fast shutdown. This was not asked as a fast way to shutdown just because we are impatient or something. This was for the event of a serious emergency where I needed a shutdown in just a very few seconds not a minute or two. Some of my services take a while to stop, foldingathome being the longest one. Basically, this is not intended to be used to shutdown a puter on a regular basis, unless you burn out P/S's on a daily basis. O-o Just didn't want someone to be using this on a regular basis and then wondering why their system has a new nickname, FUBAR. :'( Dale :-) :-) even in an emergency, e,i,u,b/o is the right thing to do. Just don't wait after the e and follow it directly by the i. -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
quoth the Neil Bothwick: On Wed, 2 Apr 2008 16:28:29 +0200, Dirk Heinrichs wrote: But nobody proposed _not_ to run ALT + SysRq + U, Neil even proposed ALT + SysRq + EISUB, to be sure everything is killed, sync'd and unmounted. Just don't try to do E or I over an SSH connection. It kills the SSH daemon and you can't reboot the box. You can guess how I learned that one :( Ha. Hopefully the machine wasn't too far away physically. -d -- darren kirby :: Part of the problem since 1976 :: http://badcomputer.org ...the number of UNIX installations has grown to 10, with more expected... - Dennis Ritchie and Ken Thompson, June 1972 -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Wed, 2 Apr 2008 12:57:21 -0700, Mark Knecht wrote: Yesterday our MythTV backend server crashed 4 times. It hung completely killing X, etc. and I was in need of a good way to bring the machine down. You have X and a keyboard on your MythTV backend? There's no way I could shut mine down quickly, first I have to get the ladder to get into the loft... -- Neil Bothwick Stop tagline theft! Copyright your tagline (c) signature.asc Description: PGP signature
Re: [gentoo-user] Emergency shutdown, how to?
On Wed, 02 Apr 2008 14:19:36 -0500, Dale wrote: Folks, keep in mind why I asked this question in the first place. My power supply was frying and I needed a VERY fast shutdown. I'd shutdown and stay shutdown until I could replace the PSU. PSUs are cheap, the components a dying one can take with it are not :( -- Neil Bothwick What is a free gift ? Aren't all gifts free? signature.asc Description: PGP signature
Re: [gentoo-user] Emergency shutdown, how to?
Neil Bothwick wrote: On Wed, 02 Apr 2008 14:19:36 -0500, Dale wrote: Folks, keep in mind why I asked this question in the first place. My power supply was frying and I needed a VERY fast shutdown. I'd shutdown and stay shutdown until I could replace the PSU. PSUs are cheap, the components a dying one can take with it are not :( Well, the P/S went out right when it was unmounting at the very end of the shutdown process. I had one file system that it had to replay a few things when I rebooted. It was a close call since the file systems that wasn't unmounted was not a critical one. I did replace the P/S with a new one tho. After getting the rubber band off the fan, I did check to see if it would boot up but it just sat there. I took it back apart and one of the transistors had a burnt spot, actually, it was a diode. Since when those things burn out they are basically not repairable, I just got a new one locally. I plan to get a permanent replacement from newegg soon. The P/S I have right now is a A-Open or something. It was all they had. I did notice that the 5 volt rail is higher than the other P/S's I have had before tho. This one is at 4.97 volts where it is usually 4.91 or something. You are right about burning out other components tho. I have had two P/S's to burn out in this one rig. So far, nothing else hurt. I have some good luck I guess. Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
On Wed, 02 Apr 2008 14:58:22 -0600, darren kirby wrote: Just don't try to do E or I over an SSH connection. It kills the SSH daemon and you can't reboot the box. You can guess how I learned that one :( Ha. Hopefully the machine wasn't too far away physically. Yards, fortunately :) -- Neil Bothwick Bother, said Pooh, as Christopher Robin shut the washing machine door. signature.asc Description: PGP signature
Re: [gentoo-user] Emergency shutdown, how to?
Dale wrote: Neil Bothwick wrote: On Wed, 02 Apr 2008 14:19:36 -0500, Dale wrote: Folks, keep in mind why I asked this question in the first place. My power supply was frying and I needed a VERY fast shutdown. I'd shutdown and stay shutdown until I could replace the PSU. PSUs are cheap, the components a dying one can take with it are not :( Well, the P/S went out right when it was unmounting at the very end of the shutdown process. I had one file system that it had to replay a few things when I rebooted. It was a close call since the file systems that wasn't unmounted was not a critical one. I can no longer contain my curiosity. How did you know it was frying? Smell, smoke? Normally, when something like that fails, it will fail too quickly for you to do anything about it. I did replace the P/S with a new one tho. After getting the rubber band off the fan, I did check to see if it would boot up but it just sat there. I took it back apart and one of the transistors had a burnt spot, actually, it was a diode. Since when those things burn out they are basically not repairable, I just got a new one locally. I plan to get a permanent replacement from newegg soon. The P/S I have right now is a A-Open or something. It was all they had. I did notice that the 5 volt rail is higher than the other P/S's I have had before tho. This one is at 4.97 volts where it is usually 4.91 or something. Ah yes, the old dead fan problem... that's why I keep a can of compressed air near my desk, and if not that, a pair of full lungs. ;-) A low quality PSU shouldn't be too bad, for the time being. However, I wouldn't recommend running on one for longer than necessary. I've had friends who trusted case PSUs a little too much, and paid the price. You are right about burning out other components tho. I have had two P/S's to burn out in this one rig. So far, nothing else hurt. I have some good luck I guess. Sounds like it. Hey, can I borrow some of that luck? You'll get it back in *almost* mint condition. Dale -Hal :-) :-) -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
2008/3/28, Dale [EMAIL PROTECTED]: Hi, I had a problem the other day where I needed to shutdown, like in a real hurry. My power supply was packed up and checking out without paying the bill. I was in KDE and just selected logout then shutdown from the menu. Is there a faster way to shutdown so that at least the file system is clean? Some fancy keystroke pattern or a short command maybe? I run foldingathome and that pesky waiting 17 seconds thing was torture. I need it to bypass that little feature as well. I hope I never run into this again but just in case I would like a pointer. It did make it to the point where it said it was unmounting file systems but one partition must have been mounted since it was well, pissed, about not being unmounted cleanly. ;-) Thank goodness for reiserfs coming to the rescue. After putting in a new P/S all is well again. You can try this one: http://en.wikipedia.org/wiki/Magic_SysRq_key Regards, Daniel -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Am Freitag, 28. März 2008 schrieb ext Dale: Is there a faster way to shutdown so that at least the file system is clean? Read /usr/src/linux/Documentation/sysrq.txt. HTH... Dirk -- Dirk Heinrichs | Tel: +49 (0)162 234 3408 Configuration Manager | Fax: +49 (0)211 47068 111 Capgemini Deutschland | Mail: [EMAIL PROTECTED] Wanheimerstraße 68 | Web: http://www.capgemini.com D-40468 Düsseldorf | ICQ#: 110037733 GPG Public Key C2E467BB | Keyserver: www.keyserver.net signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Emergency shutdown, how to?
Am Freitag, 28. März 2008 schrieb ext Daniel Pielmeier: You can try this one: http://en.wikipedia.org/wiki/Magic_SysRq_key Wow, good to know that Wikipedia has it, just in case I don't have kernel sources installed on my Gentoo systems ;-) Bye... Dirk -- Dirk Heinrichs | Tel: +49 (0)162 234 3408 Configuration Manager | Fax: +49 (0)211 47068 111 Capgemini Deutschland | Mail: [EMAIL PROTECTED] Wanheimerstraße 68 | Web: http://www.capgemini.com D-40468 Düsseldorf | ICQ#: 110037733 GPG Public Key C2E467BB | Keyserver: www.keyserver.net signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Emergency shutdown, how to?
2008/3/28, Dirk Heinrichs [EMAIL PROTECTED]: Am Freitag, 28. März 2008 schrieb ext Daniel Pielmeier: You can try this one: http://en.wikipedia.org/wiki/Magic_SysRq_key Wow, good to know that Wikipedia has it, just in case I don't have kernel sources installed on my Gentoo systems ;-) Yeah, i think it is a bit more readable than the kernel documentation. ;-) By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Regards, Daniel
Re: [gentoo-user] Emergency shutdown, how to?
Daniel Pielmeier wrote:
2008/3/28, Dirk Heinrichs [EMAIL PROTECTED]:
Am Freitag, 28. März 2008 schrieb ext Daniel Pielmeier:
You can try this one: http://en.wikipedia.org/wiki/Magic_SysRq_key
Wow, good to know that Wikipedia has it, just in case I don't have kernel
sources installed on my Gentoo systems ;-)
Yeah, i think it is a bit more readable than the kernel documentation. ;-)
By the way the safest and recommended command, although a bit longish
should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot).
Regards,
Daniel
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Since I wanted to shutdown instead of reboot, it would be ALT + SysRq +
S + U + O then correct? I have never done this before so what if any
are the gotcha's with this? Anybody ever do it and can tell me how long
a shutdown takes? Is it like seconds or what? Also, will this work if
I am logged into KDE and in the GUI?
Thanks.
Dale
:-) :-)
--
gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Emergency shutdown, how to?
Am Freitag, 28. März 2008 schrieb ext Dale: I have never done this before so what if any are the gotcha's with this? None. Anybody ever do it and can tell me how long a shutdown takes? As long as you need to strike the keys. Also, will this work if I am logged into KDE and in the GUI? Yes. Bye... Dirk -- Dirk Heinrichs | Tel: +49 (0)162 234 3408 Configuration Manager | Fax: +49 (0)211 47068 111 Capgemini Deutschland | Mail: [EMAIL PROTECTED] Wanheimerstraße 68 | Web: http://www.capgemini.com D-40468 Düsseldorf | ICQ#: 110037733 GPG Public Key C2E467BB | Keyserver: www.keyserver.net signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Emergency shutdown, how to?
On Fri, 28 Mar 2008 08:51:20 +0100, Daniel Pielmeier wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Alt-SysRq E I S U B is better as it kills running processes first. If you have time, pause between the keystrokes to give them time to work. -- Neil Bothwick Are Cheerios really doughnut seeds? signature.asc Description: PGP signature
Re: [gentoo-user] Emergency shutdown, how to?
Hello On Fri, Mar 28, 2008 at 09:11:53AM +0100, Dirk Heinrichs wrote: Anybody ever do it and can tell me how long a shutdown takes? As long as you need to strike the keys. Not really true. I have set my dirty cache timeout to 10 minutes, so it can hold some few hundred megabytes of unsynced data (happens rarely), so it can take like 10 seconds to dump them to disk. But with clean cache, it is as fast as hitting a hard switch. -- Hallowed be the zeroes and ones Michal 'vorner' Vaner pgpfCKbpetqm3.pgp Description: PGP signature
Re: [gentoo-user] Emergency shutdown, how to?
Neil Bothwick wrote: On Fri, 28 Mar 2008 08:51:20 +0100, Daniel Pielmeier wrote: By the way the safest and recommended command, although a bit longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot). Alt-SysRq E I S U B is better as it kills running processes first. If you have time, pause between the keystrokes to give them time to work. Cl. I'll try to grow a pair and test this thing sometime. This sounds like it would be pretty fast. Thanks. Dale :-) :-) -- gentoo-user@lists.gentoo.org mailing list
