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• Must partprobe before using drive?

  - by Jeff Welling

  This is a followup question to Cannot mount /dev/sdc1 on Debian 5.0, special device /dev/sdc1 doesn't exist Basically, I have 6 SATA hard drives in a machine and I'm trying to create a RAID6 array with them. When I try to run the mdadm command to create (with the verbose option) a raid array, I see messages like "mdadm: super1.x cannot open /dev/sdf1: No such device or address" which are resolved by doing partprobe /dev/sdf and then re-running the mdadm command. The problem is that I have to run partprobe after each reboot, and from experience I don't think this is normal behaviour -- on no other linux machine do I have to partprobe the device before I can use it. Something must be going wrong, but how do I troubleshoot this to find out what? Could this be caused by a hardware problem? Edit: Additional note - before I seemed to only have this problem with one drive, but now I'm having it with 3 drives.

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• Win7 glass-like Aero feature - unable to enable

  - by user24752

  I have a 4 months old PC with Win7 Home Premium x64. Windows Experience Index is 5.4. Intel i5 processor 6GB memory nVidia GT220 video card. During games, Windows reported shortage of system resources, so switched the desktop back to "Windows 7 Basic" desktop theme. After game-over, I could switch back to the normal theme and enjoy all Aero eye-candies. However, lately the glass-like window transparency feature got disabled, and I found no ways to enable it again. There is a Troubleshouting option in Control Panel saying: "Find and fix problems with transparency and other visual effects". If I launch that, it does not find anything. Event viewer is full with the following warnings: The Desktop Window Manager is experiencing heavy resource contention. Scenario : The Desktop Window Manager responsiveness has degraded. Taskbar, window borders, etc, none of the other transparent features work, and I cannot turn them on. Any thoughts?

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• RAID 0 performance gains?

  - by NickAldwin

  I'm building a new computer over the summer. I'm fairly competent in computer hardware, and am thus building the computer from scratch. I have everything planned out, but I was wondering about RAID. I asked which RAID I should use earlier, but now that it's pretty clear that RAID 1 isn't really that great, I think I'll go with cloud-backup instead of disk-redundancy. However, I still face a choice: use two 1TB drives as two 1TB drives, or combine them into a RAID 0 striped array. Is there any performance gain at all? I know that if one drive dies, everything is gone, so is the performance gain worth it? I'm building a pretty advanced computer, with SLI video cards and a fast CPU, so I'm thinking RAID 0 would give me some good hard drive performance. From your experience, is RAID 0 viable?

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• PostgreSQL 9.1 Database Replication Between Two Production Environments with Load Balancer

  - by littleK

  I'm investigating different solutions for database replication between two PostgreSQL 9.1 databases. The setup will include two production servers on the cloud (Amazon EC2 X-Large Instances), with an elastic load balancer. What is the typical database implementation for for this type of setup? A master-master replication (with Bucardo or rubyrep)? Or perhaps use only one shared database between the two environments, with a shared disk failover? I've been getting some ideas from http://www.postgresql.org/docs/9.0/static/different-replication-solutions.html. Since I don't have a lot of experience in database replication, I figured I would ask the experts. What would you recommend for the described setup?

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• Unable to Turn On Media Streaming in Windows Media Player 12 on Windows 7

  - by Chau Chee Yang

  I have 2 PC installed with Windows 7 and Media Player 12. I would like to use Play To feature on both PC connected via LAN. Both PC (A and B) run media player in standard user account. I able to turn on media streaming option in PC A (with privilege access prompt) without any problem. However, PC B also prompt privilege access but no response after enter administrator password. Both PC follow same configuration steps. I may use "play to" PC A (in standard user account) from other PC without any problem. But I can't "play to" PC B in standard user account. I can only run media player in administrator account for "play to" to function. I have tried uninstall and reinstall media player via "Programs and Features" in control panel on PC B. However, it doesn't work too. Does anyone has similar experience as me failing to turn on media streaming that running Windows media player in standard user account?

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• Set a login with username/password for SQL Server 2008 Express

  - by Ewald Stieger

  I would like to set a password and username for connecting to a server with SQL Management Studio 2008. I set up SQL Server 2008 Express on a customer's computer to host a DB used by an Access 2007 app. The customer should not be able to access the DB or connect with SQL Management Studio. How do I set up a login and remove any logins that allow a user to connect via Windows Authentication and without entering a username and password? I have not much experience with logins and controlling access.

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• Video Card needs additional mounting support

  - by Sean

  We are creating a fairly decent system with crossfire. The issue we are having is apparently the video cards are physically to heavy to be supported purely by the motherboard and case mounts. Whenever we have the case horizontal everything works fine however when we bring the case upright the computer stops working. Relevant Info: Video Cards (2) - Sapphire 5870 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814102856) MotherBoard - Asus M4A79T Deluxe Case - CoolerMaster 922 HAF To me it looks as if an additional support bracket that could hold up the end of the card would be required (included with the viideo cards!!!) Does anyone have any experience with this.

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• Snow Leopard tzdata

  - by pgb

  I live in Argentina, and our DST rules change often. So often, that major OS' tend to ship with an old version of tzdata DBs. In the past, I successfully updated the time zone databases in Tiger and Leopard. Today, however, when trying to update it in Snow Leopard, it did not work. Not only it failed, but now even after I reverted my changes, there seems to be some "cache" where the time zone information was retained. The files I updated (and reverted) are located at: /usr/share/zoneinfo and /usr/share/icu. To update those, I grabbed Apple's source code for ICU and recompiled it's database using the latest tzdata file (2010b). Then, I recompiled the tzinfo by running zic, and copied all the files to the system folders. Does anyone have experience dealing with Snow Leopard's timezone DB and can help? Thank you.

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• How do I calculate the amount of tuning needed for my server ?

  - by Low Kian Seong

  I have a server which is running a few discrete Python, Java application which most of the time imports data into a PostGreSQL database. I would like to know from people out there who have experience tuning enterprise grade servers how do i go about calculating in a holistic way the amount of tuning needed for my server for example vm.swappiness, vm.overcommit_ratio and other numerical tunings needed for my server. I tried to enable sar on my server to capture daily numbers but these are more along the lines of total numbers and I can't figure out how to allocate memory for my applications. Help would be appreciated. Thanks.

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• Mod_rewrite display subdomain.domain.com and call domain.com/subdomain/ for SSL

  - by Jeff H.

  I have a website secured by a standard SSL certificate, securing a few different shops under different subdirectories. Ex. domain.com/shop1/ The shops are also accessible via a subdomain e.g. shop1.domain.com. What I'm trying to accomplish: display shop1.domain.com to the user, while keeping all of the actual server calls as domain.com/shop1, so that the secure pages will continue to work properly. (Not sure if I'm using the proper language, exactly, I hope my point is clear.) To be clear: my SSL is working fine, and I don't need help with that, and I don't need or want to purchase a UCC cert. It can't be that difficult for anyone with experience with Apache. (I've spent 3 hours trying to learn about mod_rewrite. It's just not clicking.) I'm on a GoDaddy secure shared server, so please keep in mind that I'm not able to reset the server or anything.

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• Is there a blog tool with support for tagging posts, only displaying posts with certain combinations

  - by Philip

  What I want: A blog. I can tag posts, e.g. "A" or "B" or "all," and then you can either 1) click to only view posts tagged "A" or "all" or 2) even more ideally, I can set it so you automatically see posts tagged "A" or "all" when you log in. LaTeX support--I can type in LaTeX in the editor and it will show the math properly. No anonymous anything--must sign up and be logged in to view and comment Not as important, but convenient: Admin controls, e.g. detailed statistics, see who posts or views what when, control who posts / views, etc. Hosting: Ideally, if there's some software I can install on "my" own server, that would be ideal. But if we can't host it, it'd still be good to find some free (or maybe even paid) service elsewhere that would host the blog if it provided those tools. Any thoughts? I have no experience with this. Thanks!

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• Redirect folder to different server

  - by yuval

  Just for clarity, I already posted this on StackOverflow and got advice that this better fits in ServerFault.com so here goes: I know you can redirect subdomains to a different server, but can you do the same with folders? Say I have example.com. I can redirect mysubdomain.example.com to a different server, but can I redirect example.com/mysubdomain to a different server? I'd like to host a rails app in that folder on a site that runs php while still maintaining good search engines ratings (by not creating a sub domain which in my experience in recognized as a different site). Any help? Thanks!

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• How to make MAMP PRO / XAMPP secure enough to serve as production webserver? Is it possible?

  - by Andrei

  Hi, my task is to setup a MAMP webserver for our website in the easiest way so it can be managed by my colleagues without experience in server administration. MAMP PRO is an excellent solution, but some guys don't suggest to use it for serving external requests. Could you explain why it is bad (in details if possible) and how to make it secure enough to be a full-scale and not-only-local webserver? Is there a better solution? Update There is a discussion on the MAMP website. XAMPP developers say that one can make their product secure: The default configuration is not good from a securtiy point of view and it's not secure enough for a production environment - please don't use XAMPP in such environment. Since LAMPP 0.9.5 you can make your XAMPP installation secure by calling »/opt/lampp/lampp security«. Could you comment it?

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• How can I provide secure web content to mobile devices that can't access an intranet?

  - by evanmcd

  I'm working with a client on development web content for their intranet. We want users to be able to access a version of the content on their mobile devices, but most of them don't have the VPN capability to get on to their intranet. I'm wondering if anyone has had experience with this and can recommend a solution. One other thing to consider is that the content is not mission critically secure. If someone outside the company gained access to it, it would not represent a major issue, only a minor annoyance. Thanks for any advice.

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• scalability with nginx, passenger, ruby on rails setup

  - by Dani Cela

  Hey guys I had a question regarding scalability for my RoR application. We have been optimizing our application over the last few days and after running blitz.io, notice that our application times out after maybe 1000 hits in 30 seconds we experienced massive timeouts. In the 1 minute test apparently 74% of users would have timed out. Look at the performance of my website: http://blitz.io/report/1c8eb2f395a5eadeabd62fd831ada9e5 Not saying that our website will in any way experience this now, but I wish to design the infrastructure to handle this. What is normally done in this situation? Currently we have one web server and one database server. Would load balancing be the route to go?

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• Prevent apache http server changing response code

  - by Brad

  Hi all, I have a servlet providing a REST based service running on tomcat which I am accessing through Apache Http Server v2.2. My problem is that a response code for one for the service methods is being changed when it passes through http server. I have a curl script which I use to test the service. It is supposed to return a 204 No content response which it does when I hit the servlet directly. When I hit Apache with the script the response gets changed to a 200 Ok. Can anyone with experience of configuring Apache advise me how to fix this? Thanks, Brad.

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• What backup solution for Windows 2008 R2 servers on XenServer 5.0?

  - by Niels R.

  A friend of mine is hosting a lot of Linux VM's on his servers using XenServer 5.0. He uses rdiff-backup to make daily backups. I'm trying to convince him to host some Windows VM's (Windows 2008 R2 Web Edition) too, so he could provide (me) .NET hosting. The main problem at the moment is a backup strategy for these Windows VM's. I would like to see something like a weekly full backup (snapshot of the VM?) with daily incrementals. I've looked at Windows Backup, but because the backups are made onto network shares it doesn't provide incrementals (for what I understand). Does anyone has any experience with this situation? How did you solve this in a "not-too-hard-to-install/maintain" way?

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• Can't edit an account in MySQL Administrator on OS X

  - by Wavy Crab

  I'm running MySQL 5.5.20 on OS X 10.6.8. Using MySQL Administrator 1.2.12 (the latest) I am unable to edit any accounts. After successfully connecting to the database in MySQL Administrator, I go the Account tab, expand a user, and it just says "Loading...". It will stay on "Loading..." indefinitely. The symptoms are almost identical to user's experience and this MySQL bug from 2006, which has since been closed (fixed?). If I create a user and grant permissions to a schema, I get the error "Could not save changes to the use", which came up in 2005 as a bug (now closed). How do I edit MySQL accounts using MySQL Administrator?

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• What am I (a beginner) losing, by choosing Cherokee over Apache for serving dynamic content?

  - by Bad Learner

  I am a complete beginner and am planning to setup a photo sharing site. This is the setup I am planning, basically for a start - - Cherokee (instead of Apache) for serving dynamic content (python-based application), and Nginx for serving static files. Since, I am a beginner, what have I, to lose? So, can someone, from your experience, please tell me, what I'd lose by choosing Cherokee over Apache for serving dynamic content in PHP/Python/whatever? Anything other than the fact that there's lot of documentation, many people who can help when there's an issue etc as Apache is well established and the most popular web server? Again, my intention is not to spurt a flame war here. Just wanted to know if Cherokee would be better than Apache in terms of performance, reliability, and speed, when it matters (peak load times). Also, I heard it's a lot faster than Apache in serving dynamic content, is it true?

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• Linux Mint 13 64bit Cinnamon and Oracle Virtualbox: 3d acceleration crash

  - by Stephen Swensen

  I've recently got an interest in Linux. After some research, it looks like Linux Mint 13 cinnamon is hot and I thought I'd try it out... I'm running Windows 7 64bit and have experience with Oracle Virtual Box. So I thought it would be a good idea to try out Linux Mint inside Virtual Box. I download Linux Mint 13 64bit Cinnamon and set it up in my VM player... Nothing special about my settings. Except Linux Mint 13 Cinnamon requires 3d acceleration, and when I enable that, it crashes whenever I open the Menu in the bottom left corner of the guest OS (and some other times too)... I've seen other mentions of this problem on the web, but no solutions. Is there a solution? If not, any suggestions short of installing the OS on a partition for trying out this OS (I'm not interested in the LIve mode either - I'd really like to get the full feel for it)?

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• Vertex 2 SSD is running faster than my Vertex 3 SSD?

  - by Kairan

  I used Acronis Disk Director to do a direct clone of my C:\ windows 7 x64 drive from my Vertex 2 to my new Vertex 3 SSD (Just to show the drive software winstall everything is identical.) I ran a performance test on Windows using the Windows Experience Index. The rating I am receiving when booting on the Vertex 2 is 7.5 While I am getting only a rating for the Vertex 3 of 6.9 My understanding is that the read/write speeds of the Vertex 2 is only up to 250MB/sec while the Vertex 3 is up to 500MB/sec. Copying a single file (3GB in size) from the Vertex 3 to itself was getting speed of approx 70-80MB/sec This speed is no better (maybe worse) than what I got from the Vertex 2 I am connected via the SATA 3 port on the motherboard, using an SATA 3 cable Is this issue caused by the drive cloning? Do I have a bad SSD?

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• What is your best travel (portable) WiFi router?

  - by Sorin Sbarnea

  I'm looking for a small WiFi router that I could use to create my own wireless network when I travel. I'm also interested in a router that has very good signal/antenna and that is easy to take with you. Please do not recommend products just because you can find them on the net, I'm interested about personal experience. Also it's good to know if you can install open-source firmware on it. Selection criteria: size signal quality price Required: to support both 110V/220V power supply, best if embedded or retractable cord.

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• SQL Server 2008 R2 SQL Server has encountered x occurrence(s) of I/O requests taking longer than 15 seconds to complete on file

  - by Natalia

  When I alter or create a stored procedure directly on production or QA database, after a few seconds I start experience timeouts and application becomes unavailable. Log files shows this error: SQL Server has encountered 3 occurrence(s) of I/O requests taking longer than 15 seconds to complete on file [C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\QA_Database.ldf] in database [QA_Database] (9). The OS file handle is 0x0000000000000568. The offset of the latest long I/O is: 0x0000002821a200 We have SQL Server 2008 R2 installed, including latest Service Pack. Production and staging environments are completely separated. I tried to reproduce it on QA, but to no avail. I have no clue what it could be. Appreciate your help.

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• Employee Monitoring software

  - by nute

  I am looking for an employee monitoring solution, that would allow us to remotely connect to our computers to see what is happening live, and preferably having some recording capabilities such as snapshots, URLs visited, etc ... I've looked around the web and most softwares I found were from unknown companies, had crappy websites, and made me feel like their either wanted me to install a virus on my computer, or to scam me. Most also seemed to have planted "reviews" online most likely written by themselves. Basically, anyone has experience with a trustworthy company to accomplish that? Thanks

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• Moving files fails due to privileges but they seem to be OK

  - by joaoc

  I am trying to copy old files from an OS X 10.5.8 to a new external HD. When trying to copy a folder I get the message: The operation cannot be completed because you do not have sufficient privileges for some of the items. I've checked the privileges and they seem ok (read & write for me). What is curious is that the folder is created empty on the target drive and I can then copy the contents from inside the original folder to inside the new folder without changing anything else. This happens with several folders but not all and is making backup a pain. I have to figure out which folder broke the copy, copy its contents to the external disk and then select what hasn't been copied to copy (and eventually stop at some point and repeating the experience)

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