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• How do I make an encrypted disk image on Debian?

  - by Blacklight Shining

  I'm basically looking for an equivalent to OS X's encrypted sparsebundles. The solution should have support for file ACLs and should not force me to specify a size in the beginning (the image should only take up as much space as it needs) or require root access to mount and unmount. Ideally, I should be able to set two different passwords (both for the same data), but that's not too important. (I do have root access to the machine and so can install packages and such, but I would rather not have to sudo just to mount an image.)

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• What is the easiest way to do a direct file transfer of an extremely large file over the Internet?

  - by Kenneth Cochran

  I would like to transfer a 20+ GB file to a friend. I would like it to: Be fast Ensure data integrity Not require opening ports in either end's firewall Be free Not broadcast the file's existence to everyone on the Internet I've looked a several technologies and nothing seems to fit: Gnutella, BitTorrent, et al. satisfies 1, 2 and 4 JetBytes... 1, 3, 4 and 5 Yahoo Messenger, AIM, etc. 3, 4 and 5 FTP, SFTP... 1?, 4 and 5 rsync... 1, 2, 4 and 5 For a file this size speed and data integrity are the most important. No one wants a 20 GB file to fail a MD5 check after spending two days downloading it. Is there anything that meets all these requirements?

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• centos 100% disk full - How to remove log files, history, etc?

  - by kopeklan

  mysqld won't start because disk space is full: 101221 14:06:50 [ERROR] /usr/libexec/mysqld: Error writing file '/var/run/mysqld/mysqld.pid' (Errcode: 28) 101221 14:06:50 [ERROR] Can't start server: can't create PID file: No space left on device running df -h: Filesystem Size Used Avail Use% Mounted on /dev/sda2 16G 3.2G 12G 23% / /dev/sda5 4.8G 4.6G 0 100% /var /dev/sda3 430G 855M 407G 1% /home /dev/sda1 76M 24M 49M 33% /boot tmpfs 956M 0 956M 0% /dev/shm du -sh * in /var: 12K account 56M cache 24K db 32K empty 8.0K games 1.5G lib 8.0K local 32K lock 221M log 16K lost+found 0 mail 24K named 8.0K nis 8.0K opt 8.0K preserve 8.0K racoon 292K run 70M spool 8.0K tmp 76K webmin 2.6G www 20K yp in /dev/sda5, there is website files in /var/www. because this is first time, I have no idea which files to remove other than moving /var/www to other partition And one more, what is the right way to remove log files, history, etc in /dev/sda5?

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• Errors in ~/.xsession-errors

  - by Kuberan Naganathan

  I'm getting errors in ~/.xession-errors. I'm running ubuntu 12.04 Many apps fail to run without mention of problems in the .xsession-errors file. I looked around and tried to resolve issues myself but failed so far. I have to say it's possible that the issue is related to me mounting /home on another partition. (I say possibly because stuff worked ok for a while.) Fortunately my .xsession-errors file is small enough to post here. Thanks in advance for the help: gnome-keyring-daemon: insufficient process capabilities, unsecure memory might get used gnome-keyring-daemon: insufficient process capabilities, unsecure memory might get used gnome-keyring-daemon: insufficient process capabilities, unsecure memory might get used gnome-keyring-daemon: insufficient process capabilities, unsecure memory might get used Backend : gconf Integration : true Profile : unity Adding plugins Initializing core options...done (gnome-settings-daemon:2547): color-plugin-WARNING **: failed to get edid: unable to get EDID for output (gnome-settings-daemon:2547): color-plugin-WARNING **: unable to get EDID for xrandr-default: unable to get EDID for output (gnome-settings-daemon:2547): color-plugin-WARNING **: failed to reset xrandr-default gamma tables: gamma size is zero Initializing composite options...done Initializing opengl options...done Initializing decor options...done ** Message: applet now removed from the notification area Initializing vpswitch options...done Initializing snap options...done Initializing mousepoll options...done Initializing resize options...done Initializing place options...done Initializing move options...done Initializing wall options...done Initializing grid options...done I/O warning : failed to load external entity "/home/kuberan/.compiz/session/10754cf696d335e98e13471376531156900000024960034" Initializing session options...done Initializing gnomecompat options...done Initializing animation options...done Initializing fade options...done Initializing unitymtgrabhandles options...done Initializing workarounds options...done Initializing scale options...done compiz (expo) - Warn: failed to bind image to texture Initializing expo options...done Initializing ezoom options...done ** Message: using fallback from indicator to GtkStatusIcon (compiz:2560): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed Initializing unityshell options...done Setting Update "main_menu_key" Setting Update "run_key" Setting Update "icon_size" ** Message: moving back from GtkStatusIcon to indicator

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• Wrong chrome full screen resolution with multiple displays

  - by Martin

  I am using Google Chrome on Windows 7 64bit with two displays. The displays have different resolutions and aspect-ratios. My problem is best visible when playing back full-screen videos from a flash player inside chrome (but it is not flash related). The maximum size is calculated from the primary displays' resolution, even when the relevant window is maximised on the second screen. The problem is also visible on websites that set the width to 100%. The 100% then apply to the primary display, even when the window is opened on the secondary display. Are there any known solutions to this problem? I am observing it since many Chrome versions, do not know if it has been ever correct.

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• Post raid5 setup reboot shows single hard drive failure on ubuntu 12.10?

  - by junkie

  I just set up raid 5 on linux using three HDDs as per a guide. It all went fine until when I rebooted I got the following text: http://i.stack.imgur.com/Zsfjk.jpg. Does this mean one of my HDDs has failed? How do I check if any of them are failing? I tried using smartctl and didn't see any issues. Or is it nothing to do with failure and something else altogether? I would like to get the raid 5 working again but I'm not sure where to go from here. I'm using ubuntu 12.10 and the three raid disks each have a gpt partition with a single full size partition of filesystem type ext4. Note I only got an error on reboot not while I was creating the raid array which went fine. Thanks.

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• XCache permission issue

  - by Guilhem Soulas

  I successfully installed XCache on a Linux server where WHM/cPanel is installed too. However when I go to the admin interface it shows me only the cache for the owner of the folder (= a cPanel account). So I copied the admin interface on another cPanel account of the same server and I'm surprised about the memory allocation because it seems to use the memory I set in php.ini for EACH user. So if set the memory size to 64M and I have 10 users, doesn't it mean that XCache can take up to 640M? It's not the behaviour I want because I can't control the memory in that case! I would like to set 64M only for the entire server.

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• Using VLC to Unicast High Definition Webcam over local gigabit LAN with low/zero delay

  - by Robin Day

  We're setting up a webcam "window" between two offices in the same buildilng. The two PC's are connected to the same gigabit switch. We're using VLC to stream the webcam over HTTP using the following commands. vlc dshow:// :dshow-caching="0" :dshow-size="640x480" :sout=#transcode{vcodec=h264,vb=0,scale=0}:http{mux=ffmpeg{mux=flv},dst=:8080/} :no-sout-rtp-sap :no-sout-standard-sap :ttl=1 :sout-keep vlc http://192.168.0.1:8080 :http-caching="0" Even with the caching set to zero, the delay in the image is a good 2-3 seconds. The CPU usage of each pc is also maxed. I'm guessing it's the transcoding that's causing much of the delay. Can anyone give me some changes to these command lines that will reduce the transcoding power, or send the webcam over a different protocol, or anything that will reduce the delay of the cameras? Bandwidth is not an issue at all as the pc's can be connected to a dedicated switch/vlan if required.

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• RasterizerState set to null after calling DrawText in Nuclex

  - by ProgrammerAtWork

  I have the following code in XNA: // class members Text t1; Text t2; Text t3; // init // Debugfont is size 24 vectorfont t1 = MM.DebugFont24.Fill("hello"); t1 = MM.DebugFont24.Extrude("hello"); t2 = MM.DebugFont24.Fill("hello"); t2 = MM.DebugFont24.Extrude("hello"); t3 = MM.DebugFont24.Fill("hello"); t3 = MM.DebugFont24.Extrude("hello"); // Draw TextBatch test = new TextBatch(MM.GD); test.DrawText(t1, Color.Red); test.DrawText(t2, Color.Red); test.DrawText(t3, Color.Red); test.End(); //After the second call to the TextBatch, RasterizerState of the GraphicsDevice is set to null //But I don't get any runtime errors or any indication of that something is wrong. Is this supposed to happen? Or am I doing something wrong? I've discovered that this happened because culling was set to None when I was rendering textures

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• Get Zipped Logs from a Remote Server

  - by Jonathan

  I am tasked with trying to find a way to download zipped logs from a remote server. There are quite a bit of these logs and they are constantly created. I do have limited ssh access to the remote server and can scp or rsync the files. However, due to the sheer size of these logs file, I do not want to rsync all of them. The logs could get to terabytes and for rsync to compare them may take some time. I only want to get any new file that was created/last updated an hour ago. I also am worried that I will rsync logs that are in the process of being created, so I was thinking to only rsync files that were last modified 3-5 minutes ago. Would anyone be so kind as to help me with such a process? Thank you in advance.

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• Using rsync to synchronise folders without overwriting files of same name on Mac OS X

  - by Adam

  I would like to synchronise the contents of two directories. Without overwriting but to create a copy if two files have the same name, but different sizes Without duplicating if two files have the same name and size. To work recursively So far I have found the following command which might work $ rsync -varE --progress ~/folder /volumes/server/folder But I'm not entirely sure what the -E flag does. It was suggested by a user on bananica.com but couldn't see a description for it in the manual. Would this do what I require successfully? Thanks

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• Unable to get to remote samba share

  - by tubaguy50035

  I have a remote VPS that I would like to setup samba on and only allow my IP access to it. I currently have in my smb.conf: [global] netbios name = apollo security = user encrypt passwords = true socket options = TCP_NODELAY printing = bsd log level = 3 log file = /var/log/samba/log/%m debug timestamp = yes max log size = 100 [hosting] path = /hosting/ comment = Hosting Folder browseable = yes read only = yes guest account = yes valid users = nick I have the ports (137,138,139,445) open in iptables (they're open to everyone right now while I debug) and I see nothing in the syslog about iptables blocking my requests. When I try to open a file browser to my address \\ipaddress, it hangs for a good thirty seconds, and then opens a log in box. I enter my user name and password for the server, hit okay. It then opens the same box, I enter my credentials again and hit enter. Windows then tells me it could not connect. My user account is added to Samba already. Anybody have any suggestions what I can do to get this working?

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• CodePlex Daily Summary for Monday, November 11, 2013

  CodePlex Daily Summary for Monday, November 11, 2013Popular ReleasesULS Log Viewer Feature: ULS Log Viewer Feature: What's getting installed? - The solution include Custom Action (New action in Site Menu). Features: - Only Site Administrators can see Custom Action in site menu. - Multi-Language SUPPORT! (English, Hebrew). - Works against Secure Store Service to use administrator rights for getting access to ULS Logs Path on farm servers (Use the guide for creating new SSA). - Load only the last log file from ULS log path. - Gets automatically the ULS log path from Central Administration. - Choose from whi...Lib.Web.Mvc & Yet another developer blog: Lib.Web.Mvc 6.3.3: Lib.Web.Mvc is a library which contains some helper classes for ASP.NET MVC such as strongly typed jqGrid helper, XSL transformation HtmlHelper/ActionResult, FileResult with range request support, custom attributes and more. Release contains: Lib.Web.Mvc.dll with xml documentation file Standalone documentation in chm file and change log Library source code Sample application for strongly typed jqGrid helper is available here. Sample application for XSL transformation HtmlHelper/ActionRe...Magick.NET: Magick.NET 6.8.7.501: Magick.NET linked with ImageMagick 6.8.7.5. Breaking changes: - Refactored MagickImageStatistics to prepare for upcoming changes in ImageMagick 7. - Renamed MagickImage.SetOption to SetDefine.Media Companion: Media Companion MC3.587b: Fixed* TV - Locked shows display correctly after refresh * TV - missing episodes display in correct colour for missed or to be aired * TV - Rescrape of Multi-episodes working. * TV - Cache fix where was writing episodes multiple times * TV - Fixed Cache writing missing episodes when Display missing eps was disabled. Revision HistoryGenerate report of user mailbox size for Exchange 2010: Script Download: Script Download http://gallery.technet.microsoft.com/scriptcenter/Generate-report-of-user-e4e9afcaCheck SQL Server a specified database index fragmentation percentage (SQL): Script Download: Script Download http://gallery.technet.microsoft.com/scriptcenter/Check-SQL-Server-a-a5758043Save attachments from multiple selected items in Outlook (VBA): Script Download: Script Download: http://gallery.technet.microsoft.com/scriptcenter/Save-attachments-from-5b6bf54bRemove Windows Store apps in Windows 8: Script Download: Script Download http://gallery.technet.microsoft.com/scriptcenter/Remove-Windows-Store-Apps-a00ef4a4PCSX-Reloaded: 1.9.94: General changes:Support for compressed audio in cue files. ECM support. OS X changes:32-bit support has been dropped Partial French and Hungarian translationsDynamics AX 2012 R2 Kitting: AX 2012 R2 CU7 release of Kitting: Here is the AX 2012 R2 CU7 release of kitting. Released both as a XPO and a model.VidCoder: 1.5.12 Beta: Added an option to preserve Created and Last Modified times when converting files. In Options -> Advanced. Added an option to mark an automatically selected subtitle track as "Default". Updated HandBrake core to SVN 5878. Fixed auto passthrough not applying just after switching to it. Fixed bug where preset/profile/tune could disappear when reverting a preset.Toolbox for Dynamics CRM 2011/2013: XrmToolBox (v1.2013.9.25): XrmToolbox improvement Correct changing connection from the status dropdown Tools improvement Updated tool Audit Center (v1.2013.9.10) -> Publish entities Iconator (v1.2013.9.27) -> Optimized asynchronous loading of images and entities MetadataDocumentGenerator (v1.2013.11.6) -> Correct system entities reading with incorrect attribute type Script Manager (v1.2013.9.27) -> Retrieve only custom events SiteMapEditor (v1.2013.11.7) -> Reset of CRM 2013 SiteMap ViewLayoutReplicator (v1.201...Microsoft SQL Server Product Samples: Database: SQL Server 2014 CTP2 In-Memory OLTP Sample, based: This sample showcases the new In-Memory OLTP feature, which is part of SQL Server 2014 CTP2. It shows the new memory-optimized tables and natively-compiled stored procedures, and can be used to show the performance benefit of in-memory OLTP. Installation instructions for the sample are included in the file ‘awinmemsample.doc’, which is part of the download. You can ask a question about this sample at the SQL Server Samples Forum Composite C1 CMS - Open Source on .NET: Composite C1 4.1: Composite C1 4.1 (4.1.5058.34326) Write a review for this release - help us improve, recommend us. Getting started If you are new to Composite C1 and want to install it: http://docs.composite.net/Getting-started What's new in Composite C1 4.1 The following are highlights of major changes since Composite C1 4.0: General user features: Drag-and-drop images and files like PDF and Word directly from own your desktop and folders into page content Allow you to install Composite Form Builder ...CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.9.0: Implemented Recent Scripts list Added checking for plugin updates from AboutBox Multiple formatting improvements/fixes Implemented selection of the CLR version when preparing distribution package Added project panel button for showing plugin shortcuts list Added 'What's New?' panel Fixed auto-formatting scrolling artifact Implemented navigation to "logical" file (vs. auto-generated) file from output panel To avoid the DLLs getting locked by OS use MSI file for the installation.Resources Editor: Resources Editor: Stable releaseWPF Extended DataGrid: WPF Extended DataGrid 2.0.0.10 binaries: Now row summaries are updated whenever autofilter value sis modified.Social Network Importer for NodeXL: SocialNetImporter(v.1.9.1): This new version includes: - Include me option is back - Fixed the login bug reported latelyVeraCrypt: VeraCrypt version 1.0c: Changes between 1.0b and 1.0c (11 November 2013) : Set correctly the minimum required version in volumes header (this value must always follow the program version after any major changes). This also solves also the hidden volume issueCaptcha MVC: Captcha MVC 2.5: v 2.5: Added support for MVC 5. The DefaultCaptchaManager is no longer throws an error if the captcha values was entered incorrectly. Minor changes. v 2.4.1: Fixed issues with deleting incorrect values of the captcha token in the SessionStorageProvider. This could lead to a situation when the captcha was not working with the SessionStorageProvider. Minor changes. v 2.4: Changed the IIntelligencePolicy interface, added ICaptchaManager as parameter for all methods. Improved font size ...New ProjectsASP.NET Web API: ASP.NET Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices. ASP.NET WebDungeonPaper: DungeonPaper will be a platform for RPG players to utilize computers to replace traditional pen and paper in their campaigns.EMS: demoEvent Dispatcher: Event Dispatcher is a powershell module for centralized logging. Supports filtering events, and outputs to flat files or the Windows event log.Koopakiller.Numerics: A growing Math-Library for .NET, provided as a portable class library.NetroTrix: NetroTrix is a LAN Messenger Project.....Sharp Explorer: Sort of an alpha Play with C# to make a treeView Windows explorer. Currently multi-threaded dbl click to explore, r-click to preview some text files.TI Sensor Tag Library: A library to access the Texas Instruments Sensor Tag in Windows Store apps with Bluetooth GATT. Written in C#.ULS Log Viewer Feature: "ULS Log Viewer Feature" used by SharePoint Administrators, Developers and SharePoint Site Managers for get easily the real error behind the Correlation ID.Visual Studio Code Line Counter: VS Code Line Counter parses a Visual Studio solution file (.sln), reads each included project, and counts the number of lines in each included file.Vulcanus: TODOWax - The WiX Setup Project Editor: An interactive editor for WiX setup projects.

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• Moving windows using keyboard...faster?

  - by Alois Mahdal

  I like using keyboard shortcuts because it's faster as it does not force me to move my hands off the keyboard. In Windows I can use them to move windows around desktop: Press Alt+Space to open common windows menu Press M to choose "Move" command Navigate window position by cursor keys Confirm new position with Enter Additionally, to achieve better accuracy, I can hold Ctrl while navigating. Now the problem is that the normal "step" when moving is about 20px, and my desktop is quite large, so "walking" all the way across takes quite a long time. This kind of defeats the purpose of using keyboard for these tasks. Is it possible to change size of this step so that takes less steps to walk the same distance? (I imagine a hidden setting in Windows registry...?) I tried holding Alt while navigating, but it does not seem to have influence on speed.

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• 1080p Screen resolution problem after 10.04 to 12.04 update

  - by Ale

  I have a Samsung LCD 40" with a NVidia GeForce 6150SE nForce 430 Card. I recently upgraded from 10.04 to 12.04 and the best resolution I can get is 1360x768. I've tried the propietary drivers available on the repository kmod:nvidia_current kmod:nvidia_173_updates kmod:nvidia_current_updates kmod:nvidia_96 kmod:nvidia_96_updates kmod:nvidia_173 I've also downloaded latest from NVidia's Web, version: 295.40. But still no luck. With Nouveau driver, I can only get 1024x768. I know there is no problem with my hardware (video card, cable and monitor), I was using it perfectly on 10.04. Can anybody suggest something else I could try, to get my 1920x1080 resolution back? Thanks in advance. Here are some more information, that I got reading other similar posts on askubuntu. $ lspci | grep VGA 00:0d.0 VGA compatible controller: NVIDIA Corporation C61 [GeForce 6150SE nForce 430] (rev a2) $ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 320 x 240, current 1360 x 768, maximum 1360 x 768 default connected 1360x768 0 0 0mm x 0mm 1360x768 50.0 52.0* 1024x768 51.0 800x600 53.0 54.0 55.0 680x384 56.0 57.0 640x480 58.0 576x432 59.0 512x384 60.0 400x300 61.0 62.0 63.0 320x240 64.0

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• win2008 R2 server core software RAID

  - by shimonyk

  I am trying to set up software raid on a win2008 R2 server core. I have the disks configured as dynamic. In the server manager gui, i can see the disks, but when i right click, the option to set up "new mirrored volume" is not listed. I tried it with the command line using diskpart, and it gives the error "Virtual Disk Service Error: The size of the extent is less than the minimum." The drive are a new pair of 1Tb disks. Is this not supported in server core, or am i missing something else? Thank you

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• Problem in multi booting Ubuntu 12.04 with existing Windows XP, 7 and 8 in 500GB HDD with 5 Partitions

  - by Dhruva

  Here's my case. I have 500GB HDD with 5 Partitions with XP, Windows7 and Windows8 RP in the first three. As per one of the instruction I've seen in this forum, I did shrink my 4th Partition to create a 30GB unallocated free space to install Ubuntu 12.04. But, when next I'm trying to boot the Ubuntu CD and choosing "Something Else", its only recognizing my 500GB HDD in whole as "/sda" and not reading the free 30GB space separately to install Ubuntu in it as suggested in the instruction mentioned in this forum. I've also tried to install in from within Windows7, by mounting the Ubuntu ISO file and using the .exe file and instruction thereupon (choosing free drive, user name, installation size, etc.), but that also failed after the PC restarted to continue the installation, showing as error for file extension, partition something error. One thing to be noted that the PC I'm trying to install Ubuntu in it is my Home PC and doesn't have any internet connection. Hence, no updates or otherwise online help. What shall I do?? Kindly suggest. Sorry if I made some grammatical mistakes as English is not my first language. Thanks in advance.

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• How to force 640*480@60Hz screen resolution on xubuntu 12.04

  - by c2h2

  It seems xubuntu won't be able to correctly set resolution at 640*480@60Hz at its Display settings. And I am unable to correctly my super small 6.4 inch Mitsubishi VGA panel via VGA cable. I have tried to hack both X11 conf /etc/X11/Xorg.conf and xfce4 conf, but all the document I can find is outdated. and conf files are changed into other location. Can someone give me a hand and I'll mark correct for other people to use? Thanks! EDIT: The board is an Intel Atom D2700, gpu is SGX545. I tried to use xrandr --output default --mode 640*480 It seems works fine, but refresh rate is 75Hz, but the screen only suports 60Hz So I used xrandr --output default --mode 640*480 --rate 60 but it give error: xrandr: Failed to get size of gamma for output default Can anyone pointing any directions?

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• Installing Ubuntu next to Windows XP

  - by jess

  I have iso image for Ubuntu 11.0.4 on a CD. My OS is windows XP. I have 3 partions c, E and F. Windows is installed on C, and F has data. E is empty drive. Now, after I start installation , I choose the third option. Then click forward and I am shown three figures -- /dev/sda1 52427(total)/50931(used) /dev/sda5 52427(total)/3221(used) -- surprised, since it should be empty. I had used wubi to install earlier but have uninstalled. /dev/sda5 215206(total)/37545(used) Now, it means I need to choose sda5. Now how should I go about creating 3 partions for /(root), /home and /swap. Click edit partion and give size for each of them?

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• OSX Mail.app send only plaintext but read as html

  - by bawkstoo

  I get email which seems properly plaintext formatted, but when I forward it out, the font size ends up being enormous and a few other formatting stupidities. So I tried the following: defaults write com.apple.mail PreferPlainText -bool TRUE And this works great, all outgoing email regardless of the text original is plaintext only, just the way I like it. But now for incoming email only the plaintext portions are available to read without going into View - Message - Raw Source (or something similar to that). Does anyone know how I can force only outgoing mail to include only plaintext, but continue to read incoming mail in the formatting it was intended?

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• Is it possible at all to install Ubuntu 10.04 on Windows 7 (64-bit) using its Virtual PC?

  - by Jian Lin

  It was said that Win 7's Virtual PC is not suitable for installing Ubuntu 10.04... Is there any method at all that it will work? The following is the scenario I ran into: The first time Ubuntu 10.04 installation CD-R boots up, it asked for the Language, and "Install Ubuntu" and then the screen has vertical green bars and then the VPC just closed. The 2nd or 3rd time it booted up, there is no asking of Language or "Install Ubuntu" and just shut down the VPC, sometimes with vertical green bars. I even created another new hard drive and same thing happened. And created VPC 02, and same thing happened. Created VPC 03 with a fixed hard drive size of 60GB and same thing happened.

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• How full is too full for mechanical hard drives?

  - by Sunny Molini

  I have heard many claim that it doesn't matter how full a drive is until it starts cutting into temp and virtual memory space. This doesn't make sense to me, given the nature of how the data is transacted on a hard drive. The inside of the platter presents less data per revolution than the outside of the drive does, by significant factors. The inside 40% of the radius of full size hard drive is used for the spindle, so only the outside 60% is used for data storage, but that still means that the inside track of a hard drive presents data 60% slower than the outside track. By my calculation, a Hard drive that is only 10% full should perform about 2.25 times faster than a hard drive that is 90% full, assuming that the flow is constrained by other factors. Am I wildly off base here? For all the drives I know, even the top speeds of the first 1% of the drive would be well within the bandwidth provided by a SATA 2 connection.

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• Hardware RAID 0 without OS re-installation

  - by sterz

  I have Ubuntu & Windows 7 installed on my hdd. Can I mirror the image of the hdd to the second identical drive? Is this not recommended (i.e have to re-install every OS)? If it is okay to mirror, is there anything else to do to make hw RAID 0 work? Does RAID 0 have the same risk as a single drive? What sector size would you recommend for read/write/extract video files (mostly each around 2 GB)?

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• TCP 30 small packets per second flood connection with server

  - by Denis Ermolin

  I'm testing connection with flash client and cloud server(boost::asio for software) over TCP connection. My connection with server already is really poor - 120 ms ping in average. I found when i start to send packets with 2 bytes size (without tcp header) with speed 30 packets/s - ping grow to 170-200 average. I think that it's really bad and my bad connection and bad cloud provider is reason for this high ping without any load. What do you think? (I tested my software - it can compute about 50k small packets/s so software is not a problem). I measure my ping through flash client - send packet with timestamp and immediatly send from server to client.

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• Rendering multiple squares fast?

  - by Sam

  so I'm doing my first steps with openGL development on android and I'm kinda stuck at some serious performance issues... What I'm trying to do is render a whole grid of single colored squares on to the screen and I'm getting framerates of ~7FPS. The squares are 9px in size right now with one pixel border in between, so I get a few thousand of them. I have a class "Square" and the Renderer iterates over all Squares every frame and calls the draw() method of each (just the iteration is fast enough, with no openGL code the whole thing runs smootlhy at 60FPS). Right now the draw() method looks like this: // Prepare the square coordinate data GLES20.glVertexAttribPointer(mPositionHandle, COORDS_PER_VERTEX, GLES20.GL_FLOAT, false, vertexStride, vertexBuffer); // Set color for drawing the square GLES20.glUniform4fv(mColorHandle, 1, color, 0); // Draw the square GLES20.glDrawElements(GLES20.GL_TRIANGLES, drawOrder.length, GLES20.GL_UNSIGNED_SHORT, drawListBuffer); So its actually only 3 openGL calls. Everything else (loading shaders, filling buffers, getting appropriate handles, etc.) is done in the Constructor and things like the Program and the handles are also static attributes. What am I missing here, why is it rendering so slow? I've also tried loading the buffer data into VBOs, but this is actually slower... Maybe I did something wrong though. Any help greatly appreciated! :)

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