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  • Software RAID for several HDs which retains files on each HD

    - by Fuxi
    Is there some kind of software/driver that would enable me to create one big volume out of several hard disks but retain the file structure on each HD? This would be in case where one hard disk crashes and only data on that HD will be lost. Windows 7 enables me to do that but in case one HD breaks all data will be lost.

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  • How to Mount remote disc as local in Windows 7 and Windows 2003?

    - by Robert
    Is it possible to mount remote file system (on Windows 2003 server) as local disk in Windows 7? I have Windows 2003 server with software RAID and some shares. On another computer with Windows 7 I have software which can access only data form local or USB disks. This solution doesn't work because program doesn't see files in folder: Mount Remote CIFS/SMB Share as a Folder not a Drive Letter Everything is the same LAN.

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  • How bad is it to use a virtual file system with VMWare?

    - by user37244
    IT is running a series of VMs that we'd like to see optimized further: if the VMs' are Windows XP, storing their NTFS images out to the virtual disk (ext3) provided by Linux/VMWare, how much of a hit are we taking - as opposed to having a partition of the host hard drive formatted NTFS to eliminate the translation layer and the extra level of operating system IO preparation?

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  • Corrupted WebSphere Installation

    - by Keith
    When our server's disk fills up, WebSphere gets corrupted (missing resources in the administration console, missing servers, etc.). Is there a way to recover or repair WebSphere instead of reinstalling?

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  • How do I tell mdadm to start using a missing disk in my RAID5 array again?

    - by Jon Cage
    I have a 3-disk RAID array running in my Ubuntu server. This has been running flawlessly for over a year but I was recently forced to strip, move and rebuild the machine. When I had it all back together and ran up Ubuntu, I had some problems with disks not being detected. A couple of reboots later and I'd solved that issue. The problem now is that the 3-disk array is showing up as degraded every time I boot up. For some reason it seems that Ubuntu has made a new array and added the missing disk to it. I've tried stopping the new 1-disk array and adding the missing disk, but I'm struggling. On startup I get this: root@uberserver:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md_d1 : inactive sdf1[2](S) 1953511936 blocks md0 : active raid5 sdg1[2] sdc1[3] sdb1[1] sdh1[0] 2930279808 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] I have two RAID arrays and the one that normally pops up as md1 isn't appearing. I read somewhere that calling mdadm --assemble --scan would re-assemble the missing array so I've tried first stopping the existing array that ubuntu started: root@uberserver:~# mdadm --stop /dev/md_d1 mdadm: stopped /dev/md_d1 ...and then tried to tell ubuntu to pick the disks up again: root@uberserver:~# mdadm --assemble --scan mdadm: /dev/md/1 has been started with 2 drives (out of 3). So that's started md1 again but it's not picking up the disk from md_d1: root@uberserver:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md1 : active raid5 sde1[1] sdf1[2] 3907023872 blocks level 5, 64k chunk, algorithm 2 [3/2] [_UU] md_d1 : inactive sdd1[0](S) 1953511936 blocks md0 : active raid5 sdg1[2] sdc1[3] sdb1[1] sdh1[0] 2930279808 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] What's going wrong here? Why is Ubuntu trying to pick up sdd into a different array? How do I get that missing disk back home again? [Edit] - After adding the md1 to mdadm.conf it now tries to mount the array on startup but it's still missing the disk. If I tell it to try and assemble automatically I get the impression it know it needs sdd but can't use it: root@uberserver:~# mdadm --assemble --scan /dev/md1: File exists mdadm: /dev/md/1 already active, cannot restart it! mdadm: /dev/md/1 needed for /dev/sdd1... What am I missing?

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  • configuring apache with mod_mono for .net app

    - by Mystere Man
    I'm having a huge problem getting mod_mono and apache configured to work correctly. I've had this working at one time, but I can't seem to figure out where i'm going wrong. I'm using mono-server4. I'm trying to use a seperate port from the main website. So I have in /etc/apache2/sites-available (with a link from sites-enabled) a vhost configuration that looks like this: <VirtualHost *:9999> ServerName XXX ServerAdmin web-admin@XXX DocumentRoot /var/xxx MonoServerPath XXX "/usr/bin/mod-mono-server4" MonoDebug XXX true MonoSetEnv XXX MONO_IOMAP=all MonoApplications XXX "/:/var/xxx" <Location "/"> Allow from all Order allow,deny MonoSetServerAlias XXX SetHandler mono SetOutputFilter DEFLATE SetEnvIfNoCase Request_URI "\.(?:gif|jpe?g|png)$" no-gzip dont-vary </Location> <IfModule mod_deflate.c> AddOutputFilterByType DEFLATE text/html text/plain text/xml text/javascript </IfModule> </VirtualHost> I used mono-server4-admin to create the application mono-server4-admin --path=/var/xxx --app=/XXX --port=9999 When i start apache, it gives the error: Syntax error on line 13 of /etc/apache2/sites-enabled/xxx: Server alias 'XXX, not found. This corresponds with the MonoSetServerAlias statement. So I commented it out, and when I do that apache starts. However, when I try to access the site, I get a 500 error. The access log indicates that it's trying to access the app on port 80, rather than 9999. I'm not sure what the problem is here. Can anyone help me get figure out where I went wrong? My mono-server4-hosts.conf contains this: # start /etc/mono-server4/conf.d/RMRSite/10_XXX Alias /XXX "/var/xxx" AddMonoApplications default "/XXX:/var/xxx" <Directory /var/xxx> SetHandler mono <IfModule mod_dir.c> DirectoryIndex index.aspx </IfModule> </Directory> # end /etc/mono-server4/conf.d/XXX/10_XXX Also, my /etc/mono-server4/conf.d/XXX/10_XXX contains this: This is the configuration file for the XXX virtualhost path = /var/xxx alias = /XXX vhost = localhost port = 9999

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  • What causes Mac OS X Permission errors?

    - by Matthew Savage
    This is out of interest rather then looking for a fix to a problem. What actually causes permissions on Mac OS X Systems to become messed up? Its an easily fixed problem (i.e. there's a quick and easy fix via Disk Utility) but its something I'd encountered a few times doing support in a Mac-reseller store without actually understanding the causes. I'd guess that part of it is due to some applications not playing nicely, but what else might be the source of this issue?

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  • Install mod_perl2 on Apache 2.2.14 (Ubuntu10.04)

    - by MICADO
    Hi guys, I have installed via synaptic package ibapache2-mod-perl2. I tried this line in httpd.conf: "LoadModule perl_module modules/mod_perl.so" Apache tells me when I reload the server : "[warn] module perl_module is already loaded, skipping". Well ok, but when i try to look in the browser to a repertory i don't have access .Apache send me the error : Forbidden You don't have permission to access /cgi-bin/ on this server. Apache/2.2.14 (Ubuntu) Server at 192.168.0.10 Port 90 But this should show modperl is installed and that's not the case... I would like my virtual host that follows run with mod_perl2 <VirtualHost v1:80> ServerAdmin webmaster@localhost ServerName v1 DocumentRoot /var/www/v1 <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/v1/html/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /var/www/v1/cgi-bin/ <Directory "/var/www/v1/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> I'd like to know how to configure mod_perl2. Do i have to change something in the apache configuration file to make my cgi repertory works with mod_perl2? Thanks to any help!

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  • mod_rewrite redirect subdomain to folder

    - by kitensei
    I have a wordpress blog at the url http://www.orpheecole.com, I would like to setup 3 subdomains (cycle1, cycle2, cycle3) being redirected to their folders (1 subdomain = 1 wp blog, no multisite enabled) The file tree looks like this: /var/www/orpheecole.com/ /var/www/cycle1.orpheecole.com/ /var/www/cycle2.orpheecole.com/ /var/www/cycle3.orpheecole.com/ the following .htaccess try to redirect to /var/www/orpheecole.com/cycleX instead of its own directory, but id it's possible i'd rather redirect every subdomain to its own www folder. my sites-enabled file for main site is # blog orpheecole <VirtualHost *:80> ServerAdmin [email protected] ServerName orpheecole.com ServerAlias *.orpheecole.com DocumentRoot /var/www/orpheecole.com/ <Directory /var/www/orpheecole.com/> Options -Indexes FollowSymLinks MultiViews Order allow,deny allow from all </Directory> ErrorLog /var/log/apache2/orpheecole.com-error_log TransferLog /var/log/apache2/orpheecole.com-access_log </VirtualHost> and the .htaccess located on /var/www/orpheecole.com/ looks like this <IfModule mod_rewrite.c> RewriteEngine on RewriteCond %{HTTP_HOST} !^www.* [NC] RewriteCond %{HTTP_HOST} ^([^\.]+)\.orpheecole\.com$ RewriteCond /var/www/orpheecole.com/%1 -d RewriteRule ^(.*) www\.orpheecole\.com/%1/$1 [L] # BEGIN WordPress RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] # END WordPress </IfModule> I tried to remove wordpress directives but nothing change, and the rewrite mod is enabled and working.

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  • How can use mod_rewrite to redirect a multiple specific URLs containing multiple query strings?

    - by Derek
    Hi there folks, we recently migrated a site from a custom CMS to drupal. In an effort to preserve some links that our users bookmarked (we have about 120 redirects) we would like to forward the original URLs to a new URL. I have been searching for a couple days, but can't seem to find anything simple to what I need. We have existing URLS that contain one or more query strings, for example: /article.php?issue_id=12&article_id=275 and we would like to forward to the new location: http://foobar.edu/content/super-happy-fun-article I started using: RewriteEngine On RewriteRule ^/article\.php?issue_id=12&article_id=275$ http://foobar.edu/content/super-happy-fun-article [R=301,L] This, however, does not work. A simple RewriteRule works: RewriteRule ^test\.php$ index.php It is unclear to me how I need to use {QUERY_STRING} with multiple Basically it's 120 simple redirects that go from one existing URL to a new one. I don't need ranges [0-9], because there is no sequential order to existing URLs. Perhaps I can do what I need with RewriteMap and a simple text file that contains a line like this: index.php?issue_id=12&articleType_section=0&articleType_id=65 http://foobar.edu/category/fall-2008 If anyone has any idea on using mod_rewrite to accomplish this or if there is a better, or more simple mod, I am open to that as well. Thanks!

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  • Why does a hard disk suddenly look to Windows as if it "needs to be formatted"?

    - by pufferfish
    This is more of a theory question, but what are the reason(s) for a disk to suddenly cause Windows to start saying it "needs to be formatted"? It happens to an IDE disk that I have in a cheap external enclosure, and I can usually get most of the data back by using software like recuva. It's now happened to an internal disk I have. I'm not looking for software to fix this (although links would be appreciated), but rather a low-level explanation as to what gets corrupted on the disk.

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  • Is there a performance difference between Windows 7 on SSD installed from scratch versus it using a recent ghost/clone drive image from a harddisk?

    - by therobyouknow
    I'm planning to upgrade a notebook PC to a Solid-State Flash Drive (SSD) soon. I want to use the notebook before that and am considering installing Windows 7 on the hard disk (spinning variety, 5400rpm) before I get the SSD. To save time I am wondering if I can ghost/clone the installation of Windows 7 from the hard drive and put on the SSD. Would the performance of this clone from the harddisk onto the SSD be different from starting again and reinstalling Windows 7 from scratch on the SSD? (Windows 7 32bit professional)

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  • Are there any known issues with Windows-8 installed on a VHD?

    - by Richard
    I installed Windows 8 preview on a VHD image and it seemed to work until I actually started using it. I´m seeing terrible performance. Installing anything makes everything else "stutter" or freeze for up to a couple of seconds at a time. I looked up hard disk performance in the task manager and this is what I found: It doesn't seem right it has 2500ms response time while reading/writing at those speeds. Is this an issue with my drive, installation or VHDs in general?

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  • How to get apache to look for files in different subfolders folders?

    - by prb
    I am definitely new to mod-rewrite stuff. Note:- here the URL is common, and all the folders and subfolders on same host. The url a user uses to access their page is http://myurl.com/1234/filename.jpg Here the name of the subfolder is an integer is unique and generated dynamically by another application. The subfolder stores images specific to an individual user. So the folder structure is as follows main1 = document root main2 is another folder within main1 or document root. /main1/1234/filename.jpg /main1/5678/filename.jpg /main1/2345/filename.jpg /main1/1212/filename.jpg /main1/main2/2367/filename.jpg /main1/main2/8790/filename.jpg /main1/main2/9966/filename.jpg So, I want to write a rewrite a rule so that if a user tries to type in http://myurl.com/1234/filename.jpg, the rewrite rule will need to look where the file is and serve the request; so for request http:/myurl.com/1234/filename.jpg the actual page is located at /main1/1234/filename.jpg and then need to serve that page from that folder. So, if another users makes a request as http://myurl.com/9966/filename.jpg, it should serve the page from the following destination /main1/main2/9966/filename.jpg Please let me know if the question is still not clear. This is what i have done so far and does not work at all. RewriteCond {DOCUMENT_ROOT}/%{REQUEST_FILENAME} -f RewriteRule ^(.*)$ {DOCUMENT_ROOT}/$1 [L] RewriteCond {DOCUMENT_ROOT}/main2/%{REQUEST_FILENAME} -f RewriteRule ^(.*)$ {DOCUMENT_ROOT}/main2/$1 [L] any help is really grateful

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  • .NET assembly cache / ngen / jit image warm-up and cool-down behavior

    - by Mike Jiang
    Hi, I have an Input Method (IME) program built with C#.NET 2.0 DLL through C++/CLI. Since an IME is always attaching to another application, the C#.NET DLL seems not able to avoid image address rebasing. Although I have applied ngen to create a native image of that C#.NET 2.0 DLL and installed it into Global Assembly Cache, it didn't improved much, approximately 12 sec. down to 9 sec. on a slow PIII level PC. Therefore I uses a small application, which loads all the components referenced by the C#.NET DLL at the boot up time, to "warm up" the native image of that DLL. It works fine to speed up the loading time to 0.5 sec. However, it only worked for a while. About 30 min. later, it seems to "cool down" again. Is there any way to control the behavior of GAC or native image to be always "hot"? Is this exactly a image address rebasing problem? Thank you for your precious time. Sincerely, Mike

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  • Rails Counter Cache and its implementation

    - by Ishu
    Hello All, I am trying to get hold of rails counter cache feature but not able to grasp it completely. Let's say that We have 3 models A B C A belongs to B or C depending upon a field key_type and key_id. key_type tells whether A belongs to B or C so if key_type="B" then the record belongs to B otherwise it belongs to C. In my model a.rb, I have defined following associations: belongs_to :b, :counter_cache => true, :foreign_key => "key_id" belongs_to :c, :counter_cache => true, :foreign_key => "key_id" and in b and c model files has_many :as , :conditions => {:key_type => "B"} has_many :as , :conditions => {:key_type => "C"} Both B and C Models have a column as as_count The problem is every time an object of a is created count is increased in the both the models b and c. Any help is appreciated. Initially i thought that this may work: belongs_to :b, :counter_cache => true, :foreign_key => "key_id", :conditions => {:key_type => "B"} belongs_to :c, :counter_cache => true, :foreign_key => "key_id", :conditions => {:key_type => "C"} But this does not help. Thanks

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  • SQL Cache Dependency not working with Stored Procedure

    - by pjacko
    Hello, I can't get SqlCacheDependency to work with a simple stored proc (SQL Server 2008): create proc dbo.spGetPeteTest as set ANSI_NULLS ON set ANSI_PADDING ON set ANSI_WARNINGS ON set CONCAT_NULL_YIELDS_NULL ON set QUOTED_IDENTIFIER ON set NUMERIC_ROUNDABORT OFF set ARITHABORT ON select Id, Artist, Album from dbo.PeteTest And here's my ASP.NET code (3.5 framework): -- global.asax protected void Application_Start(object sender, EventArgs e) { string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["MyConn"].ConnectionString; System.Data.SqlClient.SqlDependency.Start(connectionString); } -- Code-Behind private DataTable GetAlbums() { string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["UnigoConnection"].ConnectionString; DataTable dtAlbums = new DataTable(); using (SqlConnection connection = new SqlConnection(connectionString)) { // Works using select statement, but NOT SP with same text //SqlCommand command = new SqlCommand( // "select Id, Artist, Album from dbo.PeteTest", connection); SqlCommand command = new SqlCommand(); command.Connection = connection; command.CommandType = CommandType.StoredProcedure; command.CommandText = "dbo.spGetPeteTest"; System.Web.Caching.SqlCacheDependency new_dependency = new System.Web.Caching.SqlCacheDependency(command); SqlDataAdapter DA1 = new SqlDataAdapter(); DA1.SelectCommand = command; DataSet DS1 = new DataSet(); DA1.Fill(DS1); dtAlbums = DS1.Tables[0]; Cache.Insert("Albums", dtAlbums, new_dependency); } return dtAlbums; } Anyone have any luck with getting this to work with SPs? Thanks!

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  • Jsp page getting called from cache rather than getting loaded from server

    - by sam4u-optimistic86
    I am calling a jsp based on 2 parameters which is passed from jsp 1 in this way.Below i pass 2 parameters into 2.jsp and based on these 2 parameters data is displayed in 2.jsp.I have a loop in which i have a number of hrefs like the one i have described below.Each of these href passes a different set of value to 2.jsp. out.println("<a href=\"2.jsp?prId=" + prog.getId() + count + "\">" + prog.getName() + "</a>"); I retrieve these 2 parameters in 2.jsp using the following lines count_id = request.getParameter( "country_id" ); prog_id = Integer.parseInt(request.getParameter( "program_id" )); Based on these 2 parameters i show the corresponding data in 2.jsp Now i have a back button in 2.jsp and i call 1.jsp in 2.jsp using the following code <a href="1.jsp"><img src="/image/back.gif" border="0"></a> The problem is when i use the back button and go back to 1.jsp and select another href like the one i have described above i get the data related to the previous href selected. I guess the problem is when i request the page is loaded from cache rather than from the server. Please advice

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  • Cache consistency & spawning a thread

    - by Dave Keck
    Background I've been reading through various books and articles to learn about processor caches, cache consistency, and memory barriers in the context of concurrent execution. So far though, I have been unable to determine whether a common coding practice of mine is safe in the strictest sense. Assumptions The following pseudo-code is executed on a two-processor machine: int sharedVar = 0; myThread() { print(sharedVar); } main() { sharedVar = 1; spawnThread(myThread); sleep(-1); } main() executes on processor 1 (P1), while myThread() executes on P2. Initially, sharedVar exists in the caches of both P1 and P2 with the initial value of 0 (due to some "warm-up code" that isn't shown above.) Question Strictly speaking – preferably without assuming any particular CPU – is myThread() guaranteed to print 1? With my newfound knowledge of processor caches, it seems entirely possible that at the time of the print() statement, P2 may not have received the invalidation request for sharedVar caused by P1's assignment in main(). Therefore, it seems possible that myThread() could print 0. References These are the related articles and books I've been reading. (It wouldn't allow me to format these as links because I'm a new user - sorry.) Shared Memory Consistency Models: A Tutorial hpl.hp.com/techreports/Compaq-DEC/WRL-95-7.pdf Memory Barriers: a Hardware View for Software Hackers rdrop.com/users/paulmck/scalability/paper/whymb.2009.04.05a.pdf Linux Kernel Memory Barriers kernel.org/doc/Documentation/memory-barriers.txt Computer Architecture: A Quantitative Approach amazon.com/Computer-Architecture-Quantitative-Approach-4th/dp/0123704901/ref=dp_ob_title_bk

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  • Load SQL query result data into cache in advance

    - by Marc
    I have the following situation: .net 3.5 WinForm client app accessing SQL Server 2008 Some queries returning relatively big amount of data are used quite often by a form Users are using local SQL Express and restarting their machines at least daily Other users are working remotely over slow network connections The problem is that after a restart, the first time users open this form the queries are extremely slow and take more or less 15s on a fast machine to execute. Afterwards the same queries take only 3s. Of course this comes from the fact that no data is cached and must be loaded from disk first. My question: Would it be possible to force the loading of the required data in advance into SQL Server cache? Note My first idea was to execute the queries in a background worker when the application starts, so that when the user starts the form the queries will already be cached and execute fast directly. I however don't want to load the result of the queries over to the client as some users are working remotely or have otherwise slow networks. So I thought just executing the queries from a stored procedure and putting the results into temporary tables so that nothing would be returned. Turned out that some of the result sets are using dynamic columns so I couldn't create the corresponding temp tables and thus this isn't a solution. Do you happen to have any other idea?

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  • Rate Limit Calls To Api Using Cache

    - by namtax
    Hi I am using coldfusion to call the last.fm api, using a cfc bundle sourced from here I am concerned about going over the request limit, which is 5 requests per originating IP address per second, averaged over a 5 minute period. The cfc bundle has a central component which calls all the other components, which are split up into sections like "artist", "track" etc...This central component "lastFmApi.cfc." is initiated in my application, and persisted for the lifespan of the application // Application.cfc example <cffunction name="onApplicationStart"> <cfset var apiKey = '[your api key here]' /> <cfset var apiSecret = '[your api secret here]' /> <cfset application.lastFm = CreateObject('component', 'org.FrankFusion.lastFm.lastFmApi').init(apiKey, apiSecret) /> </cffunction> Now if I want to call the api through a handler/controller, for example my artist handler...I can do this <cffunction name="artistPage" cache="5 mins"> <cfset qAlbums = application.lastFm.user.getArtist(url.artistName) /> </cffunction> I am a bit confused towards caching, but am caching each call to the api in this handler for 5 mins, but does this make any difference, because each time someone hits a new artist page wont this still count as a fresh hit against the api? Wondering how best to tackle this Thanks

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  • Radio buttons being reset in FF on cache-refresh

    - by Andrew Song
    (This is technically an addendum to an earlier StackOverflow question I had posted, but my original post asked a different question which doesn't really cover this topic -- I don't want to edit my older question as I feel this is different enough to merit its own page) While browsing my website in Firefox 3.5 (and only FF3.5), I come across a page with two radio buttons that have the following HTML code: <input id="check1" type="radio" value="True" name="check" checked="checked"/> <input id="check2" type="radio" value="False" name="check"/> This page renders as expected, with 'check1' checked and 'check2' unchecked. When I then go to refresh the page by pressing Control + R, the two radio buttons render, but they are both unchecked even though the raw HTML code is the same (as above). If I do a cache-miss refresh (via Control + F5 or Control + Shift + R), the page returns back to the way you'd expect it. This is not a problem in any other browser I've tried except FF3.5. What is causing these radio buttons to be reset on a normal refresh? How can I avoid this?

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  • Gem Load Error about whois command and removed cache

    - by Puru puru rin..
    Hello, I have an awesome trouble with Gem. After executing this command: rm -f /usr/local/lib/ruby/gems/1.9.1/cache/* I can not do any thing. If I try for instance: gem cleanup I get this kind of answer: /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/gemwhois.rb:3:in `require': no such file to load -- rubygems/commands/whois (LoadError) from /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/gemwhois.rb:3:in `<top (required)>' from /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/rubygems_plugin.rb:2:in `require' from /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/rubygems_plugin.rb:2:in `<top (required)>' from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1113:in `load' from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1113:in `block in <top (required)>' from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1105:in `each' from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1105:in `<top (required)>' from <internal:gem_prelude>:235:in `require' from <internal:gem_prelude>:235:in `load_full_rubygems_library' from <internal:gem_prelude>:334:in `const_missing' from /usr/local/bin/gem:12:in `<main>' It's the same for gem -v, of just gem command... I'm working of Snow Leopard. What should the best solution about you? Thanks a lot!

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  • Database cache that I'm not aware of?

    - by Martin
    I'm using asp.net mvc, linq2sql, iis7 and sqlserver express 2008. I get these intermittent server errors, primary key conflicts on insertion. I'm using a different setup on my development computer so I can't debug. After a while they go away. Restarting iis helps. I'm getting the feeling there is cache somewhere that I'm not aware of. Can somebody help me sort out these errors? Cannot insert duplicate key row in object 'dbo.EnquiryType' with unique index 'IX_EnquiryType'. Edits regarding Venemos answer Is it possible that another application is also accessing the same database simultaneously? Yes there is, but not this particular table and no inserts or updates. There is one other table with which I experience the same problem but it has to do with a different part of the model. How often an in what context do you create a new DataContext instance? Only once, using the singleton pattern. Are the primary keys generated by the database or by the application? Database. Which version of ASP.NET MVC and which version of .NET are you using? RC2 and 3.5.

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