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• NTFS disk mounted as fuseblk in ubuntu 12.10 is very slow and a lot of errors when rsync. Is that not a rare thing?

  - by Pablo Marin-Garcia

  I am having problems with a NTFS disk mounted as a fuseblk in my ubuntu 12.10 through external usb3. When I did a 1.1TB backup with rsync the speed was 1-2MB/s (wiht a ext4 disk speed was 70 MB/s before and after trying the NTFS disk). Also after one hour errors started to appear: rsync: write failed on "xxx": No such file or directory recv_files: "yyy" is a directory #but this file is a FILE not a dir ??!! .... As this is the first time I have mounted the NTFS in linux for heavy usage (the data would be used in windows afterwards), I would like to know if this kind of thinks are common o was only that something became unstable in my system and a simply restart would probably have solved it. This leads me to the these questions: Can I trust fuse for manage NTFS disks? Or is a problem of the NTFS tools in linux not yet totally stables for writing? Do people is still suffering from low performance with fuse-NTFS vs ext4 (in the past I have read about people complaining about this)?

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• How can I format a USB "thumb drive" so it will be readable on OS X and Windows?

  - by Ethan

  I have an OS X system. I want to use it to put some files on a USB drive and then be able to loan the drive to Mac and XP and Vista users so they can get the files off it. I also need to wipe the drive clean first to make sure there's nothing sensitive on it by accident because I'm going to be passing it around. What the name of the filesystem format I want? What's the procedure? Command line operations are fine.

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• How to control respond_to based on variable in Rails controller?

  - by smotchkkiss

  The dilemma I'm using a before_filter in my controller that restricts access to admins. However, I want to allow access public access to some methods based on request format. See the index method to understand what I'm talking about. items_controller.rb class ItemsController < ApplicationController before_filter :superuser_required layout 'superuser' def index @items = Item.all respond_to do |format| format.html format.js # I want public to have access to this end end def show @item = Item.find(params[:id]) respond_to do |format| format.html end end def new @item = Item.new respond_to do |format| format.html end end # remaining controller methods # ... def superuser_required redirect_to login_path unless current_user.superuser? end end

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• How to create iso dvd image for use with Mac OS X's "Disk Utility"?

  - by adolf garlic

  This seemed way easier on my pc. I would just pop a blank dvd in the drive, it asked what I wanted to do with it, to which I would respond, "burn dvd with nero" (paraphrasing), then I would pick "new" and just drag and drop the folders in there. Mac appears to have "Disk Utility" which just requires that I 'choose an image' but then doesn't bother to detail: how to do this what the options mean e.g. format "Mac OS Extended (Journaled)" is that ever going to be readable on a non Mac machine? I want to create an ISO standard DVD as per the 'default' you'd get on nero. All the stuff on the web points to doing things with 'Terminal' (the whole point of buying a Mac was to get away from command line jiggery pokery - I'm trying to burn some photos not land a friggin lunar module here!) Please, if you can just provide some simple instructions on what I need to achive this I'd be extremely grateful. Ta muchley in advance.

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• What causes "All-in-one USB Card Reader" to create 6 drives that always appear in Disk Management?

  - by tim11g

  I installed a "All-in-one USB Card Reader" to read SD cards and other media. It has caused six new drives to appear in Disk Management with six new drive letter assignments. These drives and letters are always present, even when there are no cards in the reader. When unused, they are labeled "No Media". Why does this multifunction reader cause these phantom Disks to appear and consume drive letters? Every USB port can (and does) allow removable media to be mounted and assigned a drive letter, and the drive letter assignment "disappears" when the USB drive is removed. Why are these card reader's drives and letters staying allocated permanently? Is there anything that can be done to make the slots work like a typical USB drive? (The reader is in fact connected to USB).

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• How can I convert audio files to this format?

  - by jeffamaphone

  I have a bunch of audio files that are named .wav but it seems not all .wavs are created equal. For example: $ file * file1.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz file2.wav: Audio file with ID3 version 2.2.0, contains: MPEG ADTS, layer III, v1, 160 kbps, 44.1 kHz, JntStereo file3.wav: Claris clip art? file4.wav: Audio file with ID3 version 2.2.0, contains: MPEG ADTS, layer III, v1, 160 kbps, 44.1 kHz, JntStereo And for good measure, a non-wav: file5.m4a: ISO Media, MPEG v4 system, iTunes AAC-LC I would like to convert all of these files to the format that file1.wav is: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz What is the proper set of arguments to pass to afconvert to make that happen?

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• Add JSON support to Rails app

  - by Meltemi

  I am experimenting with Rails and was wondering what's needed to allow/add support for JSON requests? I have a vanilla installation of Rails 2.3.5 and the default scaffolding seem to provide support for HTML & XML requests but not JSON. class EventsController < ApplicationController # GET /events # GET /events.xml def index @events = Event.all respond_to do |format| format.html # index.html.erb format.xml { render :xml => @events } end end # GET /events/1 # GET /events/1.xml def show @event = Event.find(params[:id]) respond_to do |format| format.html # show.html.erb format.xml { render :xml => @event } end end ... I'm new to this but it would appear as though i would need to add a format line in each method along the lines of: format.js { render :js => @event.json } couldn't this be done automatically? perhaps there's a template somewhere i need to update...or a flag i can set? Or perhaps, and most likely, I've missed the boat entirely?!?

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• Why is my HDD not showing up?

  - by Mike

  I'm on Windows 7, got a new 2 TiB NON-external hard disk. When I plug it in it doesn't show up on the Disk Management list in the Computer Management window (that you get by right-clicking My Computer and selecting "Manage"). At first I thought it was broken, but I could see it using a friend's computer. I've run a full disk scan using the official tool from Western Digital, no problems. I've formatted it and partitioned it at another friends place, I've even encrypted the disk fully without any problems, then mounted it and placed a text file on it with the word "hello" inside and saved the file. When I boot my own computer the disk shows up in BIOS. So the disk is not broken. I've tried changing what SATA slot on the motherboard I stick it in. Makes no difference. After all this: Why won't my Windows 7 discover the disk???

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• how to get SSRS 2008 R2 to export/render in Excel 2007 format?

  - by James Manning

  I have a report that has ~1k columns and ~17k rows and I'm trying to render it to Excel 2007 with SSRS 2008 R2 Nov CTP. SSRS team members have mentioned in multiple places that Excel 2007 format is included in 2008 R2, for instance: http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/69545568-73cb-4f4c-8f35-44472ba6d013 Now, it's certainly possible that it just hasn't made it into the product yet (at least as of Nov CTP), and if that's the case, that would be good to know, too (and ideally when it would be in the product). The repro report and data (along with attempts showing the existing interface still does Excel 2003 format) are attached to the bottom of this blog post, FWIW: http://cid-456117cf53a42144.spaces.live.com/default.aspx

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• how to create iso dvd image for use with mac/osx "Disk Utility"?

  - by adolf garlic

  This seemed way easier on my pc. I would just pop a blank dvd in the drive, it asked what I wanted to do with it, to which I would respond, "burn dvd with nero" (paraphrasing), then I would pick "new" and just drag and drop the folders in there. Mac appears to have "Disk Utility" which just requires that I 'choose an image' but then doesn't bother to detail - how to do this - what the options mean e.g. format "mac OS extended (journaled)" is that ever going to be readable on a non mac machine? I want to create an ISO standard dvd as per the 'default' you'd get on nero. All the stuff on the web points to doing things with 'terminal' (the whole point of buying a mac was to get away from command line jiggery pokery - I'm trying to burn some photos not land a friggin lunar module here!) Please, if you can just provide some simple instructions on what I need to achive this I'd be extremely grateful. Ta muchley in advance.

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• How do I extract all the files in a VHD to a hard disk including permissions?

  - by Middletone

  I'd like to know wha thte best way is to make an exact copy of a vhd image and pu tit onto my hard disk. I've tried xcopy but there seems to be a number of issues rlated to permissions when doing this. Ideally I'd like to copy the bits so that they match exactly on the new drive. I encountered this when trying to restore a vista backup only to discover the idiots work who decided to not let me restore a 400 gig image to a 1 TB drive size. I've sucessfully mounted the drive in Win 7 which is the environment in which I'm trying ot copy these files.

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• Custom format document option in visual studio. Formatting CSS tags.

  - by Batu

  Hi, When i work in VS2008, i use the Ctrl+K+D very often as it saves a lot of time. But in CSS files, this command formats the document in a way i don't quite like. For example when i auto format the document, .Foo { width:1px; height:2px; } However, i like to format tags this way, as it is much more easy to read (in my opinion): .Foo { width:1px; height:2px; } So, are there any way that i can implement this ? The "Tag specific options" feature seems to be the thing that i need, but i am not quite sure how to do this. Thanks.

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• Linux software raid robustness for raid1 vs other raid levels

  - by Waxhead

  I have a raid5 running and now also a raid1 that I set up yesterday. Since raid5 calculates parity it should be able to catch silent data corruption on one disk. However for raid1 the disks are just mirrors. The more I think about it I figure that raid1 is actually quite risky. Sure it will save me from a disk failure but i might not be as good when it comes to protecting the data on disk (who is actually more important for me). How does Linux software raid actually store raid1 type data on disk? How does it know what spindle is giving corrupt data (if the disk(subsystem) is not reporting any errors) If raid1 really is not giving me data protection but rather disk protection is there some tricks I can do with mdadm to create a two disk "raid5 like" setup? e.g. loose capacity but still keep redundancy also for data!?

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• Rails and Prawn PDF - add current item ID to filename?

  - by dannymcc

  Hi Everyone, I have two PDFs that are made "on the fly" using Prawn PDF. The PDFs are called jobsheet.pdf and discharge.pdf - their URL's are: railsroot/kases/IDNO/jobsheet.pdf railsroot/kases/IDNO/discharge.pdf I am trying to work out how to automagically append the filename with the ID number: railsroot/kases/IDNO/jobsheet_IDNO.pdf railsroot/kases/IDNO/discharge_IDNO.pdf To create the PDFs the code is as follows: Kases Controller def jobsheet @kase = Kase.find(params[:id]) respond_to do |format| format.html {} # jobsheet.html.erb format.xml { render :xml => @kase } format.pdf { render :layout => false } prawnto :prawn => { :background => "#{RAILS_ROOT}/public/images/jobsheet.png", :left_margin => 0, :right_margin => 0, :top_margin => 0, :bottom_margin => 0, :page_size => 'A4' } end end # GET /kases/1 # GET /kases/1.xml def discharge @kase = Kase.find(params[:id]) respond_to do |format| format.html { } # discharge.html.erb format.xml { render :xml => @kase } format.pdf { render :layout => false } prawnto :prawn => { :background => "#{RAILS_ROOT}/public/images/discharge.png", :left_margin => 0, :right_margin => 0, :top_margin => 0, :bottom_margin => 0, :page_size => 'A4' } end end Routes map.resources :kases, :member => { :discharge => :get } map.resources :kases, :member => { :jobsheet => :get } To view the PDF's I use the following links: jobsheet_kase_path(@kase, :format => 'pdf') discharge_kase_path(@kase, :format => 'pdf') Is this even possible? Thanks, Danny

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• Have error message show when form is created through AJAX

  - by Railslearner

  I have a page called /add that you can add a Dog on and the form is in its own partial. I'm using Simple Form and Twitter Bootstrap. I added the files for the main Bootstrap but use a gem for simple_form to work with it just so you know. DogsController # new.js.erb (deleted new.html.erb) def new @dog = Dog.new respond_to do |format| format.js end end # create.js.erb def create @dog = current_user.dogs.new(params[:dog]) respond_to do |format| if @dog.save format.html { redirect_to add_url, notice: 'Dog was successfully added.' } format.json { render json: @dog, status: :created, location: @dog} format.js else format.html { render 'pages/add' } format.json { render json: @dog.errors, status: :unprocessable_entity } end end end dogs/_form.html.erb <%= simple_form_for(@dog, :remote => true) do |f| %> <%= render :partial => "shared/error_message", :locals => { :f => f } %> <%= f.input :name %> <%= f.button :submit, 'Done' %> <% end %> This line: <%= render :partial => "shared/error_message", :locals => { :f => f } %> Is for bootstrap so it renders the errors html correctly. PagesController def add respond_to do |format| format.html end end pages/add.html.erb <div id="generate-form"> </div> dogs/new.js.erb $("#generate-form").html("<%= escape_javascript(render(:partial => 'dogs/form', locals: { dog: @dog })) %>"); Now how would I get this to render the error partial as if it was still on my dogs/new.html.erb since its being created through AJAX? I don't need client side validations do I?

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• Server hard disk read speed and client download speed, is there a connection? [closed]

  - by Mywiki Witwiki

  Ok so a client's download speed is only as fast as a server's upload speed, and vice versa. Based on the answers to this post: Does upload speed depend upon download speed of the server? In other words, the data transfer rate between the two computers is only as fast as the speed of the "bottleneck". Let's pretend the two computers are in two different networks and both have 100Mbps internet connection. Ben wants a copy of a file in Mark's computer hard disk with 30Mbps read speed. Does this mean that Ben can download the file at a speed of around 30Mbps only, despite having an internet connection faster than 30Mbps?

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• What lasts longer: Data stored on non-volatile flash RAM, optical media, or magnetic disk?

  - by Chris W. Rea

  What lasts longer: Data stored on non-volatile flash RAM (USB stick or SD cards?), optical media (CD, DVD, or Blu-Ray?), or magnetic disk (floppies, hard drives?) My gut tells me optical media, but I'm not sure. Furthermore, which of those digital media would be most suitable for long-term data storage where environmental issues are unknown, such as low/high temperature or humidity? For example, what digital media could be stored in a basement, attic, or time capsule, and be expected to survive a reasonably long time? e.g. a lifetime, and then some. Update: Looks like optical media and magnetic tape each have one vote below. Does anybody else have an opinion or know of a study comparing the two?

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• Maximum disk size for a Debian 6 VMware installation?

  - by Mohamed Abobakr

  I'm planning to install a variety of Linux distributions on VMware Player to get more experience with Linux (I've only used Fedora back in university). I'm starting with Debian 6.0.5 Squeeze, and have already downloaded the small CD i386 netinst image. In the new virtual machine wizard, it's asking me for the maximum disk size of the image. It says that the recommended size for Debian 6 is 8 GB. However, I'm trying to figure out what is the absolute minimal size that I can get away with, since I'm only testing it out with very few software installations (mainly testing web server applications).

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• VMware ESXi 4 On-Disk Data Deduplication - possible and supported?

  - by hurikhan77

  Environment: We are running multiple web, database, and application servers which usually share a pretty common installation (gentoo linux) and similar configuration in VMware ESXi 4. The differences are usually only some installed features or differing component versions. To create a new server, I usually choose the most similar (by features) running server, rsync a copy of it into freshly mounted filesystems, run grub, reconfigure and reboot. Problem: Over time this duplicates many on-disk data blocks which probably sums up to several 10's of gigabytes. I suppose if I could use a base system as template with the actual machines based on top of that, only writing changed blocks to some sort of "diff image", performance should improve (increased cache hit rate) and storage efficiency should increase (deduplicated storage space). This would be similar to what ESXi already supports for RAM deduplication (page sharing). Question: Is there any way to easily do this on ESXi 4? I already share the portage tree via NFS but this would not work for the rootfs.

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• Any jquery autocomplete plugin which consumes this json format?

  - by Pandiya Chendur

  Any jquery autocomplete plugin which consumes this json format? {"Table" : [{"ClientName" : "Pandiya"}, {"ClientName" : "Bala"}]}

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• How to choose my own filename format for subscribed podcast files?

  - by meomaxy

  I subscribe to several podcasts where the filenames of the downloaded mp3 files have no particular pattern to them. When I copy the directory of accumulated mp3 files into my mp3 player, the files play in alphabetical order. What I really want is to play the files chronologically by release date. I currently use iTunes on Windows XP to download the files. What I do now is manually rename the files, adding the date in YYYYMMDD format to the start of each filename so that an alphabetical listing of files will correspond to their chronological order when I listen to them later in PocketTunes on my Palm Centro. Is there some way to get the release date into the filename automatically? If so, I could automate or possibly skip the file renaming step. I would switch from iTunes to something else if that would solve my problem. The file creation time on my local disk isn't a reliable indicator because sometimes I download a few days worth of content at one time, and the files don't necessarily get downloaded in chronological order.

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• how Can we get the output format to CSV instead of HTML in Alfresco using webscripts?

  - by pavan123

  how Can we change the output format to CSV instead of HTML in Alfresco using webscripts? below are the my corresponding FTL and Webscript files recursive.get.html.ftl <#macro recurse_macro node depth> <#if node.isContainer> <tr> <td> ${node.properties.name} </td> <td></td> </tr> <#list node.children as child> <#if child.isContainer> <@recurse_macro node=child depth=depth+1/> <#list child.children as child2> <#if child2.isDocument> <tr><td></td><td>${child2.properties.name}</td></tr> </#if> </#list> </#if> </#list> </#if> </#macro> Recursive Listing of Spaces & Documents: Space Document recursive.get.desc.xml <webscript> <shortname>recurcive</shortname> <description>Recursive</description> <url>/sample/recursive/{recursive}</url> <format default="html">extension</format> <authentication>guest</authentication> </webscript> and html output is Recursive Listing of Spaces & Documents: Space Document Company Home Data Dictionary Space Templates Software Engineering Project Documentation Drafts Pending Approval Published Samples system-overview.html Discussions UI Design Presentations Quality Assurance Presentation Templates doc_info.ftl localizable.ftl my_docs.ftl my_spaces.ftl my_summary.ftl translatable.ftl recent_docs.ftl general_example.ftl my_docs_inline.ftl show_audit.ftl readme.ftl Email Templates notify_user_email.ftl invite_user_email.ftl RSS Templates RSS_2.0_recent_docs.ftl Saved Searches admin Scripts backup.js example test script.js backup and log.js append copyright.js alfresco docs.js test return value.js Web Scripts org alfresco sample blogsearch.get.js blogsearch.get.atom.ftl blogsearch.get.desc.xml blogsearch.get.html.ftl blogsearch.get.html.400.ftl blogsearch.get.atom.400.ftl categorysearch.get.js categorysearch.get.atom.ftl categorysearch.get.desc.xml categorysearch.get.html.ftl categorysearch.get.html.404.ftl categorysearch.get.atom.404.ftl folder.get.js folder.get.atom.ftl folder.get.desc.xml folder.get.html.ftl avmstores.get.desc.xml avmstores.get.html.ftl avmbrowse.get.js avmbrowse.get.desc.xml avmbrowse.get.html.ftl recursive.get.desc.xml recursive.get.html.ftl sgs.get.desc.xml sgs.get.csv.ftl sample1.get.desc.xml sample1.get.csv.ftl first.get.desc.xml first.get.text.ftl rag.get.html.ftl rag.get.desc.xml new1.get.desc.xml new1.get.html.ftl excel.get.html.ftl excel.get.desc.xml sgs1.get.desc.xml one.get.html.ftl one.get.desc.xml one.get.js readme.html Web Scripts Extensions readme.html Guest Home Alfresco-Tutorial.pdf User Homes isabel Users Home

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• Passing Derived Class Instances as void* to Generic Callbacks in C++

  - by Matthew Iselin

  This is a bit of an involved problem, so I'll do the best I can to explain what's going on. If I miss something, please tell me so I can clarify. We have a callback system where on one side a module or application provides a "Service" and clients can perform actions with this Service (A very rudimentary IPC, basically). For future reference let's say we have some definitions like so: typedef int (*callback)(void*); // This is NOT in our code, but makes explaining easier. installCallback(string serviceName, callback cb); // Really handled by a proper management system sendMessage(string serviceName, void* arg); // arg = value to pass to callback This works fine for basic types such as structs or builtins. We have an MI structure a bit like this: Device <- Disk <- MyDiskProvider class Disk : public virtual Device class MyDiskProvider : public Disk The provider may be anything from a hardware driver to a bit of glue that handles disk images. The point is that classes inherit Disk. We have a "service" which is to be notified of all new Disks in the system, and this is where things unravel: void diskHandler(void *p) { Disk *pDisk = reinterpret_cast<Disk*>(p); // Uh oh! // Remainder is not important } SomeDiskProvider::initialise() { // Probe hardware, whatever... // Tell the disk system we're here! sendMessage("disk-handler", reinterpret_cast<void*>(this)); // Uh oh! } The problem is, SomeDiskProvider inherits Disk, but the callback handler can't receive that type (as the callback function pointer must be generic). Could RTTI and templates help here? Any suggestions would be greatly appreciated.

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• How to accept localized date format (e.g dd/mm/yy) in a DateField on an admin form ?

  - by tomjerry

  Is it possible to customize a django application to have accept localized date format (e.g dd/mm/yy) in a DateField on an admin form ? I have a model class : class MyModel(models.Model): date = models.DateField("Date") And associated admin class class MyModelAdmin(admin.ModelAdmin): pass On django administration interface, I would like to be able to input a date in following format : dd/mm/yyyy. However, the date field in the admin form expects yyyy-mm-dd. How can I customize things ? Nota bene : I have already specified my custom language code (fr-FR) in settings.py, but it seems to have no effect on this date input matter. Thanks in advance for your answer

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• Which converting format of Calibre will keep a MOBI ebook's formatting together?

  - by verve

  I've got a MOBI/Kindle book and I want to convert it to a format that's easy to markup, make notes etc. but when I try to convert to TXT or PDF the result is awful. Are any of the other formats in Calibre's conversion options easily opened on any computer; any of the other formats offered by Calibre fare better after a MOBI conversion? On a side note, are there other programs that will convert a MOBI book better than Calibre? One that will keep the formatting... Win 7. IE 9.

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