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• Using "enterprise" switches in home network?

  - by Industrial

  Hi everyone, After more than 12 years working with computers, I am still way behind when it comes to networking, so please bear with me :) As of this Christmas, the number of computers in my home has increased and it's well about time to upgrade the current network hardware in order to offer LAN connection to all computers. Trying to find a cheap solution, A close friend offered me a great deal on a "enterprise-class" Switch from HP (more LAN ports than I would ever need), at the same price as what a brand new Netgear or D-link Switch with 6/8 ports would cost me in retail. Would it be common sense to get this one and start using it immediately and never again have to worry about running out of LAN connections, or am I taking on a bigger bite than what I could chew?

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• Non-Apple RAID card for Mac PRO (TOWER)

  - by Arthor

  I have the following: MAC PRO (Model Number: A1186) (PCIe - SLOTS) At present I am using the software RAID however I wish to move to the hardware raid because of the following: Performance (4 x 300gb SATA II in RAID 5) Redundancy (Raid 5, 1 drive can fail and system will be online) I do not wish to use the Apple RAID card (very expensive), I would like to use an aftermarket one which is cheaper. Questions: Does anyone have a WORKING aftermarket RAID card working in their MAC PRO (TOWER)? -(Have done some research, ROCKETRAID, need confirmation) If so to the above, does it work from boot? Thanks

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• Is there a simple Load Balancer app for development environment on Windows?

  - by djangofan

  Does there exist a simple Load Balancer app for development on Windows? I am running a pair of JBoss 5.x instances in a cluster on a single machine. Normally , this configuration is load balanced by a nice hardware load balancer but I am wondering if there is a simple piece of software to enable load balancing in my Eclipse dev environment. Basically, for example, I want a load balancer running on port 11111 that round-robins between the 2 clustered JBoss instances on ssl ports 8443 and 8543 . (or http port if thats not possible) I know that Glassfish has a built-in load balancer but I can't use Glassfish. One idea I have is to try to setup a separate instance of Tomcat with the "balancer" web app. Im trying that now... not sure if it will work... and its a complicated setup and I wish there was something really easy.

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• Recommended CPU upgrade for Dell Vostro 220 with Intel E7300 processor?

  - by Justin Grant

  I've got a Dell Vostro 220 with an E7300 processor (Intel Core 2 Duo @ 2.66Mhz, LGA775 socket) and I'm thinking about upgrading my processor so I can run Windows Server 2008 R2 with Hyper-V, which requires Hardware Virtualization support in the processor. Yes, I know this is underpowered for a server, I'm actually using it as a desktop machine but I'd like to use Hyper-V instead of Virtual Server (which I'm using now for running VMs). I'd like to keep the same motherboard and ideally the same CPU fan and RAM too. Any suggestions for a good, relatively cheap (under $200) processor upgrade?

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• Are speakers wasting power when they are not in use?

  - by Dennis Cheung

  I guess all of you have a pair/set of speakers for your MP3s. I am just interesting to how do they do when they are not playing? How actually the power spent by the speaker? Does any the below cases matter? Idle / Silence input When you computer is off / not connected Raise the volume by hardware (turn/push the button on the speaker) Raise the volume by software (do it with your mouse) BTW, to save the world. I am here to suggest you to unplug it when you leave your PC.

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• Windows Vista stuck on crcdisk.sys

  - by hristo

  Hello everyone, I'm here with some Vista-trouble. After a cigarette-break I returned to my desk to find my PC with a black screen, and after failing to wake it up did a forced restart. I haven't been installing any hardware or software for quite a while. Ever since, Vista gets stuck on the animated 'Microsoft Corporation' progress bar with the animation still running and no hard disk activity. With an F8 and safe-mode + prompt I saw that the boot gets stuck at crcdisk.sys. I'm running Vista64 SP1. What could the problem be? Any advice?

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• Configuring NAT and static IP on Cisco 877W

  - by David M Williams

  Hi all, I'm having trouble setting up a static IP reservation on a network. What I want to do is assign IP 192.168.1.105 to MAC address 00:21:5d:2f:58:04 and then port forward 35394 to it. If it helps, output from show ver says Cisco IOS software, C870 software (C870-ADVSECURITYK9-M), version 12.4(4)T7, release software (fc1) ROM: System bootstrap, version 12.3(8r)YI4, release software I have done this - service dhcp ip routing ip dhcp excluded-address 192.168.1.1 192.168.1.99 ip dhcp excluded-address 192.168.1.200 192.168.1.255 ip dhcp pool ClientDHCP network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 192.168.1.1 lease 7 ip dhcp pool NEO host 192.168.1.105 255.255.255.0 hardware-address 0021.5D2F.5804 ip nat inside source static tcp 192.168.1.105 35394 <PUBLIC_IP> 35394 extendable However, the machine is getting assigned IP address 192.168.1.101 not .105 ... any suggestions? Thanks !

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• MSI netbook refuses to connect to home wireless network with Windows XP

  - by sa125

  I'm trying to connect my girlfriend's MSI netbook to the wireless network in my house, and failing repeatedly. It's not a hardware issue, b/c it connects to other networks successfully, and, it's not a network issue, because I have another mac and linux laptops that have no problem detecting and connecting to the same network. When I open windows' network connections box, I can see the network available, and when I try to connect to it (using a password), I get a "network no longer in range.." error (the router is 2 ft away). This has been the case for the past 6 months, and I'm about to give up. I've reset the router, erased all saved network preferences and pretty much all I could think of short of re-installing XP. Any idea what else could be done? thanks.

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• development and music recording machine suggestions?

  - by dean nolan

  I wasn't sure if this belongs on SuperUser so flag if so. I am looking to build, primarily, a windows development machine that is also good for recording using Cubase. I know I should use seperate machines but I'm on a budget this time of year. I also havn't kept up with hardware for quite a few years. Basically I know I want quad core, multiple monitor support (no gaming requirements). A lot of RAM, very quiet case and super fast HDD (SSD OR 10,000RPM)for compiling and latency. I will store libraries and other data on a USB drive. Sound card is not needed as I will be using an audio interface, all other music recording equipment is taken care of also. I could do with some decent monitor recomendations also. All suggestions welcome, thanks.

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• Guaranteeing ACID properties for InnoDB databases.

  - by plinehan

  What steps must one take to ensure that an otherwise defaultly-configured InnoDB server is truly ACID compliant? The InnoDB configuration page mentions that the hardware itself must be configured to honor fsync calls, i.e. disable any write-back caches. This page mentions some other concerns, but may be conflating the binary log and the InnoDB log, and may be a bit out of date regarding default settings for MySQL 5.x. Upon reading the binary log document page it would seem that the "sync_binlog=1" setting is not required for ACID properties in general, only for ACID properties vis a vis point-in-time recovery and replication. So, is disabling write-back disk caching sufficient, or are there other settings that must be tweaked?

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• What software can I use to pinpoint why Windows Server 2003 takes 15 seconds for any operation?

  - by Dr. Zim

  Ram is about 1/2 in use, four CPUs are all but idle. I tried "Microsoft Server Performance Advisor" with no luck. No entries in the Event Log for hardware failures, etc. And yet I can click on the start menu and wait 15 seconds for any new attempt. Launching software takes 30 seconds to respond. The server has an 8 drive WD RE 250 gig each Dell Perc 6 Sata raid array with Intel gigabit network cards. Anyone have any software titles that could analyze what is going wrong with this server?

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• USB driver problems (Windows 8.1)

  - by HelloWorld

  Every time I turn on my laptop the USB ports don't work and the drivers have an error. In order to fix this I'm forced to start the Device Manager, uninstall all the USB drivers, open the Control Panel, click Find and fix problems (under System and Security), click Configure a device (under Hardware and Sound) and then when that window pops up just hit Next until I can see my USB drivers reinstalled and working in the Device Manager window under Universal Serial Bus controllers. I found this way to fix it but I would like a permanent solution so that I don't have to do this every time I turn on the machine. Any ideas? When I bought the machine it had Window 7 installed but I later upgraded it to Windows 8.0 and then 8.1 after that.

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• TP-LINK-8901 modem does not connect automatically; only works in bridged mode [closed]

  - by Arash

  Possible Duplicate: Cannot Connect To Internet In Automatic (pppoe) Mode Of Modem My TP-LINK-8901 modem does not connect to internet with "always on" (automatic) connection. I have to put it in bridge mode and make a connection in Windows to connect to internet. Also, there is no configuration problem. What I did: Reset modem Update firmware Is there any way to solve the problem myself, e.g. through hardware or software? I can't have it repaired because the warranty already expired.

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• Windows Disk I/O Analysis

  - by Jonathon

  It appears that we are having a problem with the disk i/o speed on our Windows 2003 Enterprise Edition server (64-bit). As we were initializing a database that created two 1G tablespaces on 3 different machines, it became obvious that the two smaller machines (each 32-bit Windows 2003 Standard Edition with less RAM) killed the larger machine when creating the files. The larger machine took 10x as long to create the tablespaces than did the other machines. Now, I am left wondering how that could be. What programs or scripts would you guys recommend for tracking down the I/O problem? I think the issue may be with the controller card (all boxes are hardware RAID 10, but have different controller cards), but I would like to check the actual disk I/O speed as well, so I have some hard numbers to work with. Any help would be appreciated.

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• "custom" routers for VPN - useful or waste of money?

  - by Andrew Heath

  I use VPN in China and my current service contract expires soon so I was checking what sort of plans are out there now. I found that Witopia offers a "Cloak Box", what appears to be a Linksys wireless router with allegedly hacked/custom firmware to support VPN. Aside from allowing multiple computers to share one VPN connection, is there anything else at work here to justify that price when most new routers are $100 or less these days? Or is this something targeted towards the cd-rom cupholder crowd? And yes, I've contacted them, but haven't heard back yet... EDIT I've heard back from the company - here are the details if anyone else is interested: the router is a Linksys WRT54GL running TomatoVPN custom firmware the hardware waranty is one (1) year, from Linksys/Cisco the VPN is hard-set, so any device connected to the router MUST use the VPN (Witopia blocks torrents) I've decided it's not for me, but hopefully this information will prove useful to others.

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• Exchange 2010 domainprep messing up mailbox permissions on existing Exchange 2003 server

  - by tearman

  So our environment is basically we have an Exchange 2003 server, and we're attempting to move to Exchange 2010 gradually, and move to new hardware while we're at it. So our first step was obviously to get Exchange 2010 installed on the new box. However, after running the domainprep steps listed in http://technet.microsoft.com/en-us/library/bb125224.aspx (including PrepareLegacyExchangePermissions) our mailbox permissions get messed up. Normally, we have an AD security group for Exchange Administrators that allows anyone in that group to view all folders inside any user's mailbox. However, now, this functionality is gone and our Exchange Admins can't access anyone's mailboxes. We'd like to get this functionality back if we could. Thanks

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• Toshiba monitor not displaying anything

  - by MirroredFate

  Alright, so I agreed to fix a friends computer, thinking it was a software problem, not hardware. I was going to use an XP disc and valid code to swap her from Vista to XP, as apparently Vista had some driver issues. I found out, however, that the real problem was her heat sink was completely clogged, causing the computer to overheat and shut down. So, I took the computer apart and cleaned the heat sink. However, after putting it all back together, and turning it on, nothing at all shows up. I plugged in an external monitor, and nothing shows up on that either. I have double, triple, decuply checked all the connections and everything appears to be plugged in, attached, and in the right place. I am out of ideas. So, my question is, does anyone have any clue what is going on, and have suggestions I could try?

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• How to customize Windows 7 HAL library during installation (BSOD STOP: 0x000000A5)?

  - by koldovsky

  While trying to install Windows 7 x86 Ultimate on Samsung M40 laptop (Pentium M 1.7 Dothan, 2 GB RAM/ 100 GB HDD) i receive BSOD STOP: 0x000000A5: The bios in this system is not fully ACPI compliant. Please contact your system vendor for an updated bios. The bios on the system is updated to latest version. If ACPI is the real source of the issue it means that I possibly could use another HAL library. In Windows XP it is possible to install system with generic HAL library pressing F7 when installer asks to supply drivers, but on Windows 7 I can't find such option. Ironically, Vista installs and works nice, even if they said that Windows 7 is less demanding for hardware. Windows 7 Advisor also tells nothing suspicious. Can anybody tell me how to customize Windows 7 installer to use generic HAL library (if it is possible, of course) or point me to another solution?

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• Re-enabling audio on an iMac

  - by Warren Seine

  Hello guys, I know Super User is not a 'tech support' forum, so I will try to make it short: my computer's sound does not work anymore. I have asked for support on the Apple board but I feel a bit on my own. To summarize, the Sound Panel of my iMac does not display any outgoing channel (headphones or internal speakers). It does not work on Windows either. Contrary to what it may seem, I have the feeling that it is not a hardware issue (and that GarageBand is somehow interfering). If you have an idea to solve the problem, please share. Making it work again is a lost cause without sending it back to Apple, so the question I'm asking is: What is the best workaround (cheap Firewire sound card?) for getting my sound back? Thanks.

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• How can I watch TV on my Computer (Not Online)?

  - by Sammy

  Novice question here, but how can I watch TV on my PC without using online sites? I have heard of tv tuners but is it just a matter of hooking a tv tuner to your computer and that's it? Do I have to just buy a tuner or pay for a service as well? If no service needs to be paid for, will I get just regular channels or cable/satellite channels as well? Will my PC need to be connected to the Internet when I want to watch TV? Do I need any type of software aside from the hardware tuner?

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• Can I upgrade an Asus M51Sn laptop to 2x4GB of RAM? (DDR2)

  - by matteo

  My Asus M51Sn has 2 RAM slots which currently have 1x1GB + 1x2GB DDR2-800 SODimm RAM modules installed. I've found out that 4GB DDR2 SODimm modules do exist, though they are impossible to find in local stores nere here, but I've found them in online stores like these: http://www.pccomponentes.com/g_skill_ddr2_800_pc2_6400_4gb_so_dimm.html They seem to meet the specification, so can I replace both my current modules with 2x4GB modules, and reach a total of 8GB? Or should I worry about some limit (e.g. 4GB max or 2GB per slot) imposed by the matherboard, chipset or whatever? (I currently use Ubuntu 12.04 32 bit, so I plan to use the pae kernel, which supposedly supports 4GB ram on a 32bit system; or I may consider switching tu 64bit ubuntu; the question is about hardware limitations, not OS limitations).

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• What is causing my newly built PC with Windows 7 to BSOD?

  - by Ben S

  I recently built my own PC from parts and installed Windows 7 and I have been getting BSODs with various different stop codes. The latest was 0x24, but I've also had 0xd1 and 0x1e. However, Windows does not let me know where the fault occurred, so I have no idea how to go about resolving this. I know the cause is likely a hardware driver, but I don't know which and cannot find information about how to use the minidumps to troubleshoot my problem. I've uploaded the last three minidumps in case someone can make sense out of them and let me know what could be causing my BSODs. Thanks, Ben

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• Kernel config file generator

  - by lisak

  Hey guys, could please anybody recommend some kind of kconfig generator that would trim modules and built-in stuff that is not needed according to current hardware ? The best I have found is this : http://lkml.org/lkml/2008/9/16/290 I don't care about compilation time and the amount of modules that are not built-in. I'm concerned about performance. I don't know how much memory and runtime is wasted on huge kernels with almost everything possible. I'm a java developer and I don't know what most of the modules and drivers are for. So there is not much I can disable and be sure that I don't screw it up. Thanks in advance

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• How to secure Firefox traffic (+DNS) through SOCKS proxy under Ubuntu 10.04?

  - by Maarx

  I'm using Ubuntu 10.04, and starting a SOCKS proxy with 'ssh -D', and setting Ubuntu to use it with "System - Preferences - Network Proxy". Firefox uses the proxy, and the proxy's IP appears when I visit a site like http://www.whatismyip.com/. My question is, is Firefox resolving DNS requests through this proxy? Is my web-browsing truly secure? (That is, until I exit the other end of the proxy. I know it's insecure after that.) (And I've verified the keys, I'm not being man-in-the-middled) (And--screw it. You know what I mean. Is it resolving DNS requests through the proxy?) I don't know how I would go about verifying such a thing for myself. Using additional hardware such as another debugging proxy is not an option. If Firefox isn't resolving my DNS requests through the SOCKS proxy, how do I go about fixing it?

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• What could cause Vista machines to degrade in performance?

  - by gencha

  We have installed several machines running Windows Vista at a client site. These machines run the same set of applications each day and are not operated with by any user. They mainly run a 3D application for digital signage purposes. After a few months I noticed that several machines suffer from really bad stuttering. The performance is unacceptable. At first I figured it was faulty hardware. But after putting a fresh image on them, they run perfectly fine again. These are Core i7 machines with GTX 280 graphics adapters. They should be able to handle the workload without any trouble (and they do, at least for a while). I really have no idea how to track down the source of this issue. Especially since not all of the machines display the same issue.

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