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• Tool to Save a Range of Disk Clusters to a File

  - by Synetech inc.

  Hi, Yesterday I deleted a (fragmented) archive file only to find that it did not extract correctly, so I was left stranded. Fortunately there was not much space free on the drive, so most of the space marked as free was from the now-deleted archive. I pulled up a disk editor and—painfully—managed to get a list of cluster ranges from the FAT that were marked as unused. My task then was to save these ranges of clusters to files so that I could examine them to try to determine which parts were from the archive and recombine them to attempt to restore the deleted file. This turned out to be a huge pain in the butt because the disk editor did not have the ability to select a range of clusters, so I had to navigate to the start of each cluster and hold down Ctrl+Shift+PgDn until I reached the end of the range (which usually took forever!) I did a quick Google search to see if I could find a command-line tool (preferably with Windows and DOS versions) that would allow me to issue a commands such as: SAVESECT -c 0xBEEF 0xCAFE FOO.BAR ::save clusters 0xBEEF-0xCAFE to FOO.BAR SAVESECT -s 1111 9876 BAZ.BIN ::save sectors 1111-9876 to BAZ.BIN Sadly my search came up empty. Any ideas? Thanks!

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• File Replication Service Errors

  - by ekamtaj

  Hey Guys, We have a windows 2003 r2 server and couple of the users are reporting that they can not scan files into the windwos server. They are getting an Out of Space errors. I took a look at the server and we have 600GB free disk space on that partition. But while looking at the event log I found a lot of errors like (13552,13555) The File Replication Service is unable to add this computer to the following replica set: "DOMAIN SYSTEM VOLUME (SYSVOL SHARE)" This could be caused by a number of problems such as: -- an invalid root path, -- a missing directory, -- a missing disk volume, -- a file system on the volume that does not support NTFS 5.0 The information below may help to resolve the problem: Computer DNS name is "server.domain.local" Replica set member name is "server" Replica set root path is "c:\windows\sysvol\domain" Replica staging directory path is "c:\windows\sysvol\staging\domain" Replica working directory path is "c:\windows\ntfrs\jet" Windows error status code is FRS error status code is FrsErrorMismatchedJournalId Other event log messages may also help determine the problem. Correct the problem and the service will attempt to restart replication automatically at a later time. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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• java get file paths

  - by user283188

  hey everybody, I have a jsp page which contains the code which prints all files in a given directory and their file paths. The code is if (dir.isDirectory()) { File[] dirs = dir.listFiles(); for (File f : dirs) { if (f.isDirectory() && !f.isHidden()) { File files[] = f.listFiles(); for (File d : files) { if (d.isFile() && !d.isHidden()) { System.out.println(d.getName()+ d.getParent() + (d.length()/1024)); } } } if (f.isFile() && !f.isHidden()) { System.out.println(f.getName()+ f.getParent() + (f.length()/1024)); } } } The problem is that it prints the complete file path, which when accessed from tomcat is invalid. For example, the code spits out the following path: /usr/local/tomcat/sites/web_tech/images/scores/blah.jpg and I want it to only print the path up to /images ie /images/scores/blah.jpg I know I could just mess around with an actual string, ie splitting it or string matching, but is there an easier way to do it? Thanks

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• How can I delete a file created and opened with Perl's IO::File and XML::Writer?

  - by Sho Minamimoto

  So I'm running through a list of things and have code that creates an .xml files with IO::File called $doc, then I make a new writer with XML::Writer(OUTPUT => $doc). More code runs and I build a big XML file with XML::Writer. Then, near the end of the file, I find out if I need this file at all. If I do need it, I just: $writer->end(); $doc->close(); but if I don't need it, what should I enter to just delete all data I've stored/saved and move onto the next file? I tried unlink($docpath) (before and after $doc->close()), the file was not deleted.

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• Reverse massive text file in Java

  - by DanJanson

  What would be the best approach to reverse a large text file that is uploaded asynchronously to a servlet that reverses this file in a scalable and efficient way? text file can be massive (gigabytes long) can assume mulitple server/clustered environment to do this in a distributed manner. open source libraries are encouraged to consider I was thinking of using Java NIO to treat file as an array on disk (so that I don't have to treat the file as a string buffer in memory). Also, I am thinking of using MapReduce to break up the file and process it in separate machines. Any input is appreciated. Thanks. Daniel

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• Efficient way to delete a line from a text file (C#)

  - by Valentin Vasilyev

  Hello. I need to delete a certain line from a text file. What is the most efficient way of doing this? File can be potentially large(over million records). Thank you. UPDATE: below is the code I'm currently using, but I'm not sure if it is good. internal void DeleteMarkedEntries() { string tempPath=Path.GetTempFileName(); using (var reader = new StreamReader(logPath)) { using (var writer = new StreamWriter(File.OpenWrite(tempPath))) { int counter = 0; while (!reader.EndOfStream) { if (!_deletedLines.Contains(counter)) { writer.WriteLine(reader.ReadLine()); } ++counter; } } } if (File.Exists(tempPath)) { File.Delete(logPath); File.Move(tempPath, logPath); } }

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• repeated entries in website log file

  - by Reza

  I am writing an ad hoc log analyser for my website log file. The following is part of the log file in which it shows file1.pdf has been downloaded twice. Looking carefully, the time stamp and IP address are exactly the same in both entries. How can it be possible to have 2 downloads at the same time by the same person. Should I count it as 2 in my programme or as 1? Any reply is appreciated. name_of_subdomain xxx.xxx.xx.xx - - [02/Apr/2012:09:13:31 +0100] "GET /file1.pdf HTTP/1.1" 206 3706 "-" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; CMDTDF)" name_of_subdomain xxx.xxx.xx.xx - - [02/Apr/2012:09:13:31 +0100] "GET /file1.pdf HTTP/1.1" 206 425462 "-" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; CMDTDF)"

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• Update in grub.cfg file for loading new kernel image in Ubuntu 11.04

  - by user1627657

  I am new to Linux. I am compiling Linux kernel (ver: 2.6.34.12) in gcc in traditional manner in VMware machine in Ubuntu (kernel version - 2.6.38-8-generic) 11.04 version. I am unable to find, where to update about newly compiled kernel in the grub.cfg file. I updated the newly created image version name in the existing image. Then VMware didn't able to load new kernel. I have searched in internet but I didn't find. So anyone can help me, to update in the grub.cfg and to successfully load new kernel. Few things about what I have done: Make bzImage to create image file. Make modules_install && make install to install modules and then sudo mkinitramfs -o initramfs.img-2.6.34 2.6.34. Then sudo gedit grub.cfg. In that at the mementry I updated the version of vmlinuz and initrd from 2.6.38-8 to 2.6.34.12. This is I have done.

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• Load/Store Objects in file in Java

  - by brain_damage

  I want to store an object from my class in file, and after that to be able to load the object from this file. But somewhere I am making a mistake(s) and cannot figure out where. May I receive some help? public class GameManagerSystem implements GameManager, Serializable { private static final long serialVersionUID = -5966618586666474164L; HashMap<Game, GameStatus> games; HashMap<Ticket, ArrayList<Object>> baggage; HashSet<Ticket> bookedTickets; Place place; public GameManagerSystem(Place place) { super(); this.games = new HashMap<Game, GameStatus>(); this.baggage = new HashMap<Ticket, ArrayList<Object>>(); this.bookedTickets = new HashSet<Ticket>(); this.place = place; } public static GameManager createManagerSystem(Game at) { return new GameManagerSystem(at); } public boolean store(File f) { try { FileOutputStream fos = new FileOutputStream(f); ObjectOutputStream oos = new ObjectOutputStream(fos); oos.writeObject(games); oos.writeObject(bookedTickets); oos.writeObject(baggage); oos.close(); fos.close(); } catch (IOException ex) { return false; } return true; } public boolean load(File f) { try { FileInputStream fis = new FileInputStream(f); ObjectInputStream ois = new ObjectInputStream(fis); this.games = (HashMap<Game,GameStatus>)ois.readObject(); this.bookedTickets = (HashSet<Ticket>)ois.readObject(); this.baggage = (HashMap<Ticket,ArrayList<Object>>)ois.readObject(); ois.close(); fis.close(); } catch (IOException e) { return false; } catch (ClassNotFoundException e) { return false; } return true; } . . . } public class JUnitDemo { GameManager manager; @Before public void setUp() { manager = GameManagerSystem.createManagerSystem(Place.ENG); } @Test public void testStore() { Game g = new Game(new Date(), Teams.LIONS, Teams.SHARKS); manager.registerGame(g); File file = new File("file.ser"); assertTrue(airport.store(file)); } }

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• How to search for duplicate values in a huge text file having around Half Million records

  - by Shibu

  I have an input txt file which has data in the form of records (each row is a record and represents more or less like a DB table) and I need to find for duplicate values. For example: Rec1: ACCOUNT_NBR_1*NAME_1*VALUE_1 Rec2: ACCOUNT_NBR_2*NAME_2*VALUE_2 Rec3: ACCOUNT_NBR_1*NAME_3*VALUE_3 In the above set, the Rec1 and Rec2 are considered to be duplicates as the ACCOUNT NUMBERS are same(ACCOUNT_NBR1). Note: The input file shown above is a delimiter type file (the delimiter being *) however the file type can also be a fixed length file where each column starts and ends with a specified positions. I am currently doing this with the following logic: Loop thru each ACCOUNT NUMBER Loop thru each line of the txt file and record and check if this is repeated. If repeated record the same in a hashtable. End End And I am using 'Pattern' & 'BufferedReader' java API's to perform the above task. But since it is taking a long time, I would like to know a better way of handling it. Thanks, Shibu

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• Elevating UAC via .bat file?

  - by jslaker

  Pretty straightforward one that I'm having trouble finding an answer to. serverfault previously helped me with finding a way to automate Windows updates without using WSUS. It's working fantastically, but to run it over the network, you have to first mount a shared drive. That's pretty simple XP since you just mount the drive and run the updater. On Vista and W7, though, this all has to be done with elevated privileges to work correctly. The UAC account can't see network drives mounted by the regular user, so in order to get everything working, I have to mount the share via net use from an escalated shell. I'd like to automate mounting this share and launching the updater via a simple .bat file. I could probably just instruct everybody to right click "Run as Administrator" on the .bat file, but I'd like to keep things as simple as possible and have the .bat automatically prompt the user to escalate their privileges. Since these computers don't belong to us, I can't count on anything like Powershell being installed, so that rules any solution along those lines out and pretty much have to rely on things that would be included in an RTM Vista install. I'm hoping I'm mostly missing something obvious here. :)

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• how check all of my file copy correctly by batch file?

  - by rima

  Dear all friends I have a batch file that copy all the files from src place to dest place. I used xcopy command. Now I want to make sure all of my file copy correctly and delete all the files in src folder, do you have any idea? I dont know is there any command for delete the folder with all the files and folder inside it? please advise me.... my source folder has below structure > root | > [sub folder1] > | > filex.s > filei.z > [sub folder2] > | > filep.a > fileq.q > [sub folder3] > | > filex.s > filei.z > filsi.w > file1.xx > file2.cc > file3.ss

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• Java File manipulation

  - by user69514

  So I have an application with a JFileChooser from which I select a file to read. Then I change some words and write a new file. The problem that I am having is that when I write the new file it's saved in the project directory. How do I save it in the same directory as the file that I chose using the JFileChooser. Note: I don't want to use the JFileChooser to choose the location. I just need to save the file in the same directory as the original file that I read.

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• In which document do file specifications belong?

  - by Andrew

  In which document would a file specification belong? Perhaps this file is used as an input to a third-party system. Would it belong in its own document? Or would it be better to put it in the functional or design spec? Or somewhere else? When I say file specification, I mean a description of what format the file is (CSV, fixed width, etc), columns, data types, etc. Also, where should you document how the file is generated? i.e. business rules/algorithms which are used to generate the file.

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• Windows batch/script code to conditionally process based on date value in text file

  - by CarolinaJay65

  I am using Windows XP. The code can be used in a batch file or vbs script. I intend to use Windows scheduler to run the program. I need code to read a date from a text file (could be the only line in the text file or the date could be included in the filename, I control the process that generates the file) The code would then need to evaluate the text file date against the current date to confirm that the text file date is from the prior month. I'm starting to build a process to be able to run 1st-of-the-month jobs once the monthly data has been refreshed. I'm new to building this kind of process using batch/script files. Thanks for your time

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• Split a binary file into chunks c++

  - by L4nce0

  I've been bashing my head against trying to first divide up a file into chunks, for the purpose of sending over sockets. I can read / write a file easily without splitting it into chunks. The code below runs, works, kinda. It will write a textfile and has a garbage character. Which if this was just for txt, no problem. Jpegs aren't working with said garbage. Been at it for a few days, so I've done my research, and it's time to get some help. I do want to stick strictly to binary readers, as this need to handle any file. I've seen a lot of slick examples out there. (none of them worked for me with jpgs) Mostly something along the lines of while(file)... I subscribe to the, if you know the size, use a for-loop, not a while-loop camp. Thank you for the help!! vector<char*> readFile(const char* fn){ vector<char*> v; ifstream::pos_type size; char * memblock; ifstream file; file.open(fn,ios::in|ios::binary|ios::ate); if (file.is_open()) { size = fileS(fn); file.seekg (0, ios::beg); int bs = size/3; // arbitrary. Actual program will use the socket send size int ws = 0; int i = 0; for(i = 0; i < size; i+=bs){ if(i+bs > size) ws = size%bs; else ws = bs; memblock = new char [ws]; file.read (memblock, ws); v.push_back(memblock); } } else{ exit(-4); } return v; } int main(int argc, char **argv) { vector<char*> v = readFile("foo.txt"); ofstream myFile ("bar.txt", ios::out | ios::binary); for(vector<char*>::iterator it = v.begin(); it!=v.end(); ++it ){ myFile.write(*it,strlen(*it)); } }

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• Direct3D9 application won't write to depth buffer

  - by DeadMG

  I've got an application written in D3D9 which will not write any values to the depth buffer, resulting in incorrect values for the depth test. Things I've checked so far: D3DRS_ZENABLE, set to TRUE D3DRS_ZWRITEENABLE, set to TRUE D3DRS_ZFUNC, set to D3DCMP_LESSEQUAL The depth buffer is definitely bound to the pipeline at the relevant time The depth buffer was correctly cleared before use. I've used PIX to confirm that all of these things occurred as expected. For example, if I clear the depth buffer to 0 instead of 1, then correctly nothing is drawn, and PIX confirms that all the pixels failed the depth test. But I've also used PIX to confirm that my submitted geometry does not write to the depth buffer and so is not correctly rendered. Any other suggestions?

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• Why should i write a commit message?

  - by acidzombie24

  Why should i write a commit message? I dont want to and i think its stupid every single time. A gui frontend i use which will go unnamed forces you to do it. I hear other doing it everytime even if they are using the VCS on the command line. If i commit several times a day and havent finish a feature what am i writing about? I ONLY ever write a message after many comments and i feel its time for a mini tag or when i do an actual tag. Am i right or am i missing something? also i am using a distributed system

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• Improving mdadm RAID-6 write speed

  - by BarsMonster

  Hi! I have a mdadm RAID-6 in my home server of 5x1Tb WD Green HDDs. Read speed is more than enough - 268 Mb/s in dd. But write speed is just 37.1 Mb/s. (Both tested via dd on 48Gb file, RAM size is 1Gb, block size used in testing is 8kb) Could you please suggest why write speed is so low and is there any ways to improve it? CPU usage during writing is just 25% (i.e. half of 1 core of Opteron 165) No business critical data there & server is UPS-backed. mdstat is: Personalities : [raid6] [raid5] [raid4] md0 : active raid6 sda1[0] sdd1[4] sde1[3] sdf1[2] sdb1[1] 2929683456 blocks super 1.2 level 6, 1024k chunk, algorithm 2 [5/5] [UUUUU] bitmap: 0/8 pages [0KB], 65536KB chunk unused devices: <none> Any suggestions?

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• How to write good blog post tags

  - by keruilin

  It seems that you have three choices in deciding how you write tags for your blog posts: Make them user friendly Make them highly searchable Combo of the two For example, let's say that I have a blog post that has write-ups on the top 10 ipad apps for business travel (e.g., Evernote, Dragon Diction, Instapaper, etc.). User friendly tags: ipad apps, business travel Searchable keywords (analyzed with Google Keyword Analyzer): ipad apps, ipad travel apps, evernote ipad, instapaper, instapaper ipad Combo: ipad apps, ipad travel apps So my question comes down to this: which is really the best choice -- 1, 2 or 3? Note: this visible post tags will also serve as the meta keywords for the post page.

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• ARC write-up on the OTM SIG

  - by John Murphy

  ARC write-up on the recent OTM SIG event. The Oracle Transportation Management Special Interest Group (OTM SIG) hosted its 6th annual user conference in Philadelphia, Pennsylvania, August 13-15, 2012. This independently run conference drew almost 400 attendees, predominantly Oracle Transportation Management (OTM) users. It featured four concurrent tracks that included both functionally and technically focused presentations. The tracks included a number of informative presentations by OTM users from various industries. These discussed the users' implementations, current usage, and future plans for OTM within their organizations. ARC Advisory Group found ConAgra's and Mutual Materials' presentations on OTM adoption and Kraft's presentation on the company's use of Fusion Transportation Intelligence particularly informative. Complete ARC write-up

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• How to write functionally in a web framework

  - by Kevin Burke

  I love Rich Hickey, Clojure and Haskell and I get it when he talks about functions and the unreliability of side-effecting code. However I work in an environment where nearly all the functions I write have to read from the database, write to the database, make HTTP requests, decrement a user's balance, modify a frontend HTML component based on a click action, return different results based on the URI or the POST body. We also use PHP for the frontend, which is littered with functions like parse_str(), which modifies an object in place. All of these are side-effecting to one degree or another. Given these constraints and the side-effecting nature of the logic I'm coding, what can I do to make my code more reliable and function-able?

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• What file manager/uploader do you use with your embeded wysiwyg editor ?

  - by Wookai

  I am looking for a wysiwyg editor to allow user to edit part of their website. I already worked with TinyMCE, and heard about CKEditor, which both look great. However, they both lack a free (PHP) file manager/uploader, as they sell their own tool to make some money. I found a few free alternatives for TinyMCE, the best one (for my needs) being PHP Letter's one, but I was wondering about what the community uses ? Do you buy the "official" file manager ? Do you code your own ? Or do you have a great (free) alternative ?

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• why write-enable ring

  - by SpashHit

  Here's an "interview question" that while ostensibly about hardware really does inform a software design principal as well. Computers used to (still do I guess, somewhere) use magnetic tape reels to store data. There was a plastic accessory you could attach to a tape reel called a "write-enable ring". If the tape had such a ring, the tape drive allowed writing to the tape... if not, it only allowed read access. Why was the choice to design the system in this way? Why not have a "write protect ring" instead, with the opposite effect?

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• Why a write-enable ring?

  - by SpashHit

  Here's an "interview question" that while ostensibly about hardware really does inform a software design principal as well. Computers used to (still do I guess, somewhere) use magnetic tape reels to store data. There was a plastic accessory you could attach to a tape reel called a "write-enable ring". If the tape had such a ring, the tape drive allowed writing to the tape... if not, it only allowed read access. Why was the choice to design the system in this way? Why not have a "write protect ring" instead, with the opposite effect?

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