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• What's a worthwhile test for a new HD?

  - by Michael Kohne

  I work for a company that uses standard 2.5" SATA HD's in our product. We presently test them by running the Linux 'badblocks -w' command on them when we get them - but they are 160 gig drives, so that takes like 5 hours (we boot parted magic onto a PC to do the scan). We don't actually build that many systems at a time, so this doable, but seriously annoying. Is there any research or anecdotal evidence on what a good incoming test for a hard drive should be? I'm thinking that we should just wipe them with all zeros, write out our image, and do a full drive read back. That would end up being only about 1 hour 45 minutes total. Given that drives do block remapping on their own, would what I've proposed show up any infant mortality just as well as running badblocks?

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• which mail server is better suited for high volume? [closed]

  - by crashintoty

  I'm planning out a project (web/mobile app) that would require a mail server that could handle hundreds of thousands connections per hour (both IMAP/POP and SMTP) and has the ability to interface with PHP (or python or whatever) to dynamically create, delete and check for mailboxes? This is not for spam stuff, I just need my app to generate random mailboxes (and static/permanent ones too) to receive mail and process it for items listed on my service. The little research I've done so far has turned up courier, dovecot, cyrus and haraka. I think the ability to scale and/or load balance (I'm new to these terms, pardon me) would also be a requirement. Any ideas?

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• Setting up VPS hosting

  - by RobinFTW

  I'm trying to set up my own vps hosting. It wont be a paid service, just an experiment for me and some nerdy friends. What I'd like to be able to do is this: Run multiple virtual servers on 1 external IP. These servers can run anything from Minecraft servers to simple http servers. They will also need to be accessible thru SSH. What I don't get is how I can address these servers using domain names. I've done some research and found out that I could use Vhosts with Apache. However this only applies to http servers. It was also suggested I'd use a reverse proxy(squid) but this also only applies to http requests. I could just use different ports for different servers, but thats not ideal and not what I want. Can someone suggest a setup? Maybe some tutorials or anything.

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• Is it possible to put an 8000 series socket-F Opteron into a dual-socket motherboard?

  - by René Kåbis

  Exactly what it says on the Tin. I have a dual-socket, socket-F motherboard in which I am looking to put two high-end quad-core Opterons, but the 2000 series are nearly double the price of the 8000 series on eBay. Can I just drop in a pair of 8000 series processors and be done with it, or are there processor-critical motherboard features that would be present on a quad(+)-socket motherboard that don’t exist on a dual-socket motherboard? Please elaborate or link to resources that can explain this further, as I am not adverse to research (and I am interested in the technical issues involved) I am probably using the wrong search terms, as Google failed to return anything within the first few dozen results.

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• Fedora 14 - Error 5 - No space on Disk - After installation.

  - by amitahire

  I am new to Fedora, am still figure my way through it. I was going about tweaking it and preparing it to my needs, While installing through yum I dont have much other than the fact that I have to search for the packages. But when I open "Add/remove software" of Fedora. I am greeted with " No space left on the disk" and when I seek for more details it says " Disk Error :[errno 5] Input/output error" I did some research and I saw that it usually occurs during installation, but here I have successfully installed it. Can someone help me with it? Later on I even had notification of the same warning. And mind you I got loads of free space. Thanks for the help

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• Move email off Small Business Server to Google Apps, retain other SBS functions?

  - by Paul S.

  Recently, an in-house Microsoft Small Business Server 2011 was installed where I work. Unfortunately, our buildings have a bad electrical power supply and we suffer frequent outages. We have a large percentage of staff working off-site. Now when the power goes off here, everyone everywhere loses email functionality. I have been assigned to research the possibility of routing our email to Google Apps while maintaining LAN functions on the SBS. I haven't worked with Microsoft products for several years now, so do not know how SBS is structured. Can anyone here tell me if this is possible, or point me to good resources that explain our options?

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• Windows XP alt-tab: How to restrict options to certain applications, in certain order and exclude others?

  - by Rob

  In Windows XP Alt-tab keypress sequence to select applications, how can I ensure that certain applications always appear, in a certain order, with others always excluded? Background for asking is that most XP-based machines that I am working with on a shop floor present the list of shortcuts in a certain order and certain applications. There is one machine however, that displays an additional application. This is a hindrance to the users of the machines, as the nature of their work is routine and this variation disrupts the remembered sequence, "disrupts their flow". Thoughts? Being a good superuser, I research first before asking, and I found: Applications randomly alt-tab? (especially full screen games) Restore Alt-Tab behavior so that minimizing an app once again moves it to the end? (2. looks close to the control I need, but would need more finer, preciser control over what appears in the selection). Suggestions? (Thanks in advance.)

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• Restoring the Windows 7 boot loader after uninstalling Windows 8?

  - by ???

  A while back I installed Windows 8 Consumer Preview on my PC. As expected, I quickly grew bored of it, and uninstalled it. I removed the whole partition on which I had installed the OS, and everything seemed okay, until I rebooted. Whenever I reboot, I'm displayed with the Windows 8 boot loader (even though I deleted the whole partition it was on?), and I can't choose any operating system to boot into. It just says that there was an error. I did some research, and found out that I should use EasyBCD, but I'm not sure if I can burn it on to a CD and then boot from it? (I have only 700 MB CDs available) Or if there's another tool that I could burn on to a CD that would let me remove the Windows 8 boot loader, and just let me boot to Windows 7.

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• Could 11.5 Million 401's be causing bottlenecks?

  - by roviuser

  I'm going to preface this with a warning: My knowledge about servers and networking is VERY limited, and if you provide me with technical answers, I probably won't understand much until I research your answer further. I'm trying to expand my knowledge and learn about it, though. If the information that I am able to provide in this question is insufficient to answer the question, I understand, and it can be closed. We have a SharePoint 2007 system that is extremely slow, mostly from huge amounts of use. We've been told that the main speed bottleneck is the access to the sql databases. However, they do provide a statistics dashboard, so I did some poking around, and noticed that we have 11.5 million or more 401 - access denied errors every month. Could this be causing major speed/performance decreases? Authentication for sharepoint uses active directory.

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• Installing Ubuntu on an External Drive

  - by Dom

  I am trying to install ububtu on an external drive. I am a programmer who wants to start using Linux. I downloaded the usb installer from the ubuntu website and followed all the steps. But when I get to the part where I have to setup the partitioning, it says an error when moving forward "No root file system is defined". I've been doing some research and I think that I have to partition the external drive but do not know how to do so. The problem is that I only want 20gb used from that external drive and let the rest be used for storage. I am also a musician and use Pro tools so I would like to keep all my files there, but I dont want ubuntu on my main hardrive since the external one is portable. I'd appreciate it also if you could provide me the steps.

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• Restarting Nagios Using PHP

  - by X-Ware

  I am making a tool that is interacting with NAGIOS where some config files should be added so a restart will be needed. What I need to know is how to restart NAGIOS using PHP code since this tool is written in PHP .. when I try to do this using: shell_exec("service nagios restart"); changes do not take place but when I do this manually by the console all changes I did using the PHP script are applied ... after 2 minutes research I found that I am asking linux to execut this command while I am logged in as apache user so I changed the command to: shell_exec('echo "mypass" | sudo -S service nagios restart'); still having the same problem ... new config files are not read until I restart manually any suggestions will be appreciated :)

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• Why would one server be sending DUP ACK packets to one PC, which is responding with HTTP RST packets?

  - by IronicMuffin

  I'm not a network profressional, so please excuse any wrong language. I was debugging why my DNS traffic was a constant 160Kbps on our corporate network. I opened up a wireshark trace, and I see one PC of a coworker broadcasting HTTP [RST] packets to one of our DMZ servers at the rate of 1000 a second. He restarted his machine, and as soon as it went offline, the server started broadcasting [DUP] [ACK] packets, until he came back online. It then resumed the HTTP [RST] packets. Apparently this server has been doing this kind of behavior since it went live. I believe it did this with a printer and an access point as well. Can anyone explain why this behavior is occurring? Any solutions? The initial research was done because there have been "bandwidth issues" and I wonder if this is contributing.

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• Howto display or view encrypted data in encrypted form?

  - by Brian Gianforcaro

  In the Wikipedia Article on Block Cipher Modes they have a neat little diagram of an unencrypted image, the same image encrypted using ECB mode and another version of the same image encrypted using another method. At university I have developed my own implementation of DES (you can find it here) and we must demo our implementation in a presentation. I would like to display a similar example as shown above using our implementation. However most image files have header blocks associated with them, which when encrypting the file with our implementation, also get encrypted. So when you go to open them in an image viewer, they are assumed to be corrupted and can't be viewed. I was wondering if anybody new of a simple header-less image format which we could use to display these? Or if anyone had any idea's as to how the original creator of the images above achieved the above result? Any help would be appreciated, Thanks Note: I realise rolling your own cryptography library is stupid, and DES is considered broken, and ECB mode is very flawed for any useful cryptography, this was purely an academic exercise for school. So please, no lectures, I know the drill.

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• C# Generic Generics (A Serious Question)

  - by tahirhassan

  In C# I am trying to write code where I would be creating a Func delegate which is in itself generic. For example the following (non-Generic) delegate is returning an arbitrary string: Func<string> getString = () => "Hello!"; I on the other hand want to create a generic which acts similarly to generic methods. For example if I want a generic Func to return default(T) for a type T. I would imagine that I write code as follows: Func<T><T> getDefaultObject = <T>() => default(T); Then I would use it as getDefaultObject<string>() which would return null and if I were to write getDefaultObject<int>() would return 0. This question is not merely an academic excercise. I have found numerous places where I could have used this but I cannot get the syntax right. Is this possible? Are there any libraries which provide this sort of functionality?

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• A require a server hosting package that would be suitable for several .net managed applications, accessed only by me

  - by user67166

  Hello, I currently run a server at home consisting of SQL Server 2008 .net Framework 2010 VPN Connection ASP.net Web Services running around 5-6 applications supporting a financial trading system that i regularly use. THe only user is me. Recently the requirement to have these applications running in a 24/7 100% uptime (or 99%) environment has become important. No longer can I both meet this requirement and host my server at home on my network - so i am looking to move to a dedicated hosting company. After some research, the only real companies I can find offering such services are geared towards company web-space hosting. I don't need 1TB+ bandwidth, what i need is CPU, Memory and as much control over the environment as possible. Does anyone have any examples of such a service? Thanks in advance.

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• ModRewrite Domain

  - by Mike Knoop

  I've done a little research into ModRewrite rules and conditions but have not been able to find a satisfactory set of rules/conds which achieve the effect I'm looking for. Essentially, I have a directory on domain A (http://www.domaina.com/dir/) which I would like to redirect to a different directory on domain B (http://www.domainb.com/diff_dir/). Note that I only want to apply the rewrite rule if the user is attempting to access /dir/ on domaina. If they are accessing a different directory or root I do not want to rewrite the URL. Thank you!

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• How to temporarily disable SonicWall from connecting to the internet?

  - by Jerry Dodge

  I have been doing some extensive seeking in our SonicWall TZ-215 for the source(s) of unnecessary internet traffic, as we have issues with excessive traffic. As part of my research, I need to watch the Connections Monitor, which lists me all the current connections. This list becomes quite long, with 40+ devices on the network, it's tough to pinpoint the main causes. What I would like to do is disable the SonicWall its self from letting its internal components from connecting to anything. Is there any type of trick I can do in the Firewall which can prevent the router system from connecting to anything, to clean up the connections monitor and allow only suspicious traffic?

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• Vista Home Premium won't connect to network.

  - by Ice

  I deinstalled some software (e.g. some Toolbars for IE and Norton security suite, because the free trial period of 60 days is run out and so i want to switch to microsofts free security essentials). But now i cannot connect to the network again: Neither over LAN nor over WiFi. Neither with standard DHCP ON (sets a 169.254.x.y address) nor with fixed IP-Address. No error during changing the settings. Ping to the Gateway e.g. doesn't work and gives "generall failure". The DHCP-Client sets no IP-Address. There is allways only 'local access' on every network-connection. i ran out of ideas, please help. UPDATE per 2011-03-11: I followed each and every hint but nothing changed. I did a research on microsofts homepage through all the sites belonging to network but nothing helped. What can i do next?

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• Hardware needed for 2000 users? [closed]

  - by Trcx

  I have school assignment that is fairly well defined, requiring us to come up with a plan for an environment serving dynamic web applications to 2000 users, and should be able to scale up to six thousand. I have done plenty of research as far as load balancing, redundancy, UPSs, etc, but am having a hard time figuring out how much hardware is actually needed in the way of physical servers, ram, processing power, etc. The assignment states that the server will have a lot of dynamic code, email, and a database are required, all utilizing the appropriate microsoft service (MS SQL, Exchange, IIS). I already plan on splitting them out on to separate servers, but can't even fathom the hardware requirements of something that large scale. Could someone with experience weight in on this, or point me two some good articles?

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• Is is better to combine Apache for file manipulation and upload and Nginx for static file serving, or to use one of the two alone

  - by user1032393

  Based on my research, I've read that nginx is best and ideal for serving up static files and images. My application depends heavily on uploading of images and rewriting them, then serving them up. Given that I only have one VPS currently, it has been suggested that I use nginx to serve up the images and website, and reverse proxy to Apache (on the same VPS) to rewrite files with image magick and handle the file uploads. Which would be the best solution, Apache, Nginx, or Apache + Nginx? In terms of best solution, I'm looking at minimal average RAM consumption, while maintaining decent load speed of maybe sub 2 seconds?

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• How to move a Windows instance to a different EC2 data centre?

  - by Darren Cook

  I've a Windows EC2 instance running in one region and need to move it to another region (Tokyo and Singapore in this case). Is that even possible? What potential problems do I need to watch out for? (I found http://stackoverflow.com/questions/2181849/ec2-instance-cloning which is describing how to do it, but appears to assume Linux instances, and to assume the same data centre. Is it possible to move my keys across to another region?) I tried something similar with a Windows instance a few months ago, just trying to clone it in the same data centre, but I couldn't get it working quickly, so I had to give up and just create a fresh instance at that time. This time I've got a bit of breathing space, and want to research how to do it properly! Root Device Type: ebs Block Devices: sda1 xvdf (both are ebs, "attached", and have Delete on termination set to "no"; sda1 is the root device) The AMI is described as "Unavailable" (then an ami number).

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• Slow Crash with Filter Manager

  - by Alex N.

  I have been having sporadic freezes on my machine lately. There is no blue screen or crash screen. All the applications just stop responding and ~5~10 minutes later it will power off. After checking the event log a couple times, I have found that the same event occurs right before each crash. File System Filter 'Avgmfx64' (6.1, ?2011?-?12?-?23T08:08:12.000000000Z) has successfully loaded and registered with Filter Manager. My question is twofold: I can not seem to find any information on what the Filter Manager actually is supposed to do. for curiosities sake, what is it? And more importantly, how do I fix this problem. From the research I have done, I see that similar problems can be caused by out of date drivers, so I have already taken the time to update all of my drivers, run MemTest, and verify the drive integrity.

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• Installation stuck on "Installation Type" screen

  - by Andrew Latham

  I am trying to install Ubuntu 11.10 with Windows 7 from a CD. I am using an HP Pavilion dm4. I've never used Ubuntu (or any Linux) before. Everything goes alright until I get to the "Installation Type" screen. Instead of giving me options, it just has a blank menu, and all the buttons are disabled. When I click "Continue", it gives me an error saying that it can't find the root or something like that. The trial version works fine, but I can't actually install it. Everything on the trial version is really slow, presumably because everything is on the CD or the Windows partition. I did some research, but the only post I could find was http://ubuntuforums.org/showthread.php?t=1870478 Where the only advice is to format the entire drive, which I'm not willing to do. Any suggestions? I'm downloading 10.04 right now and I'm going to try with that instead. EDIT: 10.04 didn't work either. I got to the partitioning screen and got the same problem. I read some more forums, loaded up 11.10 trial from the disk, opened the Terminal and typed sudo apt-get remove dmraid and then y. Then I was actually able to see something on the "Installation type" page: "Erase disk and install Ubuntu" or "Something else". Which is weird, since Windows 7 should be installed. When I click Something Else, I get: /dev/sda /dev/sdb /dev/sdb1 (ntfs) (208 MB) (69 MB used) /dev/sdb2 (ntfs) (477542 MB) (unknown used) /dev/sdb3 (ntfs) (18085 MB) (16094 MB used) /dev/sdb4 (fat32) (4265 MB) (3084 MB used) I have no idea what any of this means. Also, my device for boot loader installation changed from /dev/sda to /dev/sda ATA SAMSUNG MZMPA032 (32.0 GB)

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• How do I blend 2 lightmaps for day/night cycle in Unity?

  - by Timothy Williams

  Before I say anything else: I'm using dual lightmaps, meaning I need to blend both a near and a far. So I've been working on this for a while now, I have a whole day/night cycle set up for renderers and lighting, and everything is working fine and not process intensive. The only problem I'm having is figuring out how I could blend two lightmaps together, I've figured out how to switch lightmaps, but the problem is that looks kind of abrupt and interrupts the experience. I've done hours of research on this, tried all kinds of shaders, pixel by pixel blending, and everything else to no real avail. Pixel by pixel blending in C# turned out to be a bit process intensive for my liking, though I'm still working on cleaning it up and making it run more smoothly. Shaders looked promising, but I couldn't find a shader that could properly blend two lightmaps. Does anyone have any leads on how I could accomplish this? I just need some sort of smooth transition between my daytime and nighttime lightmap. Perhaps I could overlay the two textures and use an alpha channel? Or something like that?

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• Travelling MVP #1: Visit to SharePoint User Group Finland

  - by DigiMortal

  My first self organized trip this autumn was visit to SharePoint User Group Finland community evening. As active community leaders who make things like these possible they are worth mentioning and on spug.fi side there was Jussi Roine the one who invited me. Here is my short review about my trip to Helsinki. User group meeting As Helsinki is near Tallinn I went there using ship. It was easy to get from sea port to venue and I had also some minutes of time to visit academic book store. Community evening was held on the ground floor of one city center hotel and room was conveniently located near hotel bar and restaurant. Here is the meeting schedule: Welcome (Jussi Roine) OpenText application archiving and governance for SharePoint (Bernd Hennicke, OpenText) Using advanced C# features in SharePoint development (Alexey Sadomov, NED Consulting) Optimizing public-facing internet sites for SharePoint (Gunnar Peipman) After meeting, of course, local dudes doesn’t walk away but continue with some beers and discussion. Sessions After welcome words by Jussi there was session by Bernd Hennicke who spoke about OpenText. His session covered OpenText history and current moment. After this introduction he spoke about OpenText products for SharePoint and gave the audience good overview about where their SharePoint extensions fit in big picture. I usually don’t like those vendors sessions but this one was good. I mean vendor dudes were not aggressively selling something. They were way different – kind people who introduced their stuff and later answered questions. They acted like good guests. Second speaker was Alexey Sadomov who is working on SharePoint development projects. He introduced some ways how to get over some limitations of SharePoint. I don’t go here deeply with his session but it’s worth to mention that this session was strong one. It is not rear case when developers have to make nasty hacks to SharePoint. I mean really nasty hacks. Often these hacks are long blocks of code that uses terrible techniques to achieve the result. Alexey introduced some very much civilized ways about how to apply hacks. Alex Sadomov, SharePoint MVP, speaking about SharePoint coding tips and tricks on C# I spoke about how I optimized caching of Estonian Microsoft community portal that runs on SharePoint Server and that uses publishing infrastructure. I made no actual demos on SharePoint because I wanted to focus on optimizing process and share some experiences about how to get caches optimized and how to measure caches. Networking After official part there was time to talk and discuss with people. Finns are cool – they have beers and they are glad. It was not big community event but people were like one good family. Developers there work often for big companies and it was very interesting to me to hear about their experiences with SharePoint. One thing was a little bit surprising for me – SharePoint guys in Finland are talking actively also about Office 365 and online SharePoint. It doesn’t happen often here in Estonia. I had to leave a little bit 21:00 to get to my ship back to Tallinn. I am sure spug.fi dudes continued nice evening and they had at least same good time as I did. Do I want to go back to Finland and meet these guys again? Yes, sure, let’s do it again! :)

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