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  • Wifi Drops Connections with WPA2-PSK

    - by graf_ignotiev
    I run a small computer lab made up of 10 computers of identical hardware and software (Dell Latitudes with Windows 7 x64 Enterprise) and I use a ZyWALL 2WG as a router/firewall. Nine of the computers connect to the router over wifi using WPA2-PSK encryption while the last one is connected by ethernet cable. I'm having a problem where any computer connected to the wi-fi occasionally drops off the network (it cannot be pinged and the client cannot ping the gateway). It only happens on the wifi side and only when the encryption is WPA2-PSK or WPA-PSK. I tried using another router with a different make and model and had no problems. Thinking it could be a software error, I reset the router to factory defaults and installed the newest firmware (V4.04(AQI.8) | 04/09/2010), but still have the problem. The 802.1X log gives the following error User logout because of user disassociation. with this note WPA2-PSK:00242c582ece:logout where 00242c582ece is the mac address of the device. At this point I'm out of things to try and leads to follow. It looks like this user had the same or similar problem, but none of those proposed solutions work for me.

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  • Azure can't ping or telnet VM from client

    - by Raif
    I have a VM on Azure with an instance sqlserver 2012 running on it. From my work computer and my home computer I can't get sqlserver management studio connect to it. I have looked at ALL the settings recommended in numerous articles. everything is setup correctly. endpoint 1433 Private and public sqlserver tcp enabled. sqlserver tcp listening on right port sqlserver using mixed auth windows fire wall, holes poked and then disabled on both client and VM can log in from VM using the credentials that I'm trying to use remotely further more I can't ping the dns or ip or tellnet address from my local machines. I can however hit the iis from a browser using the ip. strange. CS asked me to download MS Network Monitor, which I did and pinged and telneted. I have the results saved but can't really make heads or tails of them. CS hasn't responded yet. I can post some info here that would help. EDIT Never one to shrink from a challenge, I deleted my VM and re-did everything. Now it works although my confidence azure is somewhat shaken.

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  • MD3200 - 3 to 4x less throughput than MD1220. Am I missing something here?

    - by Igor Polishchuk
    I have two R710 servers with similar configuration. One in my office has MD1220 attached. Another one in the datacenter of my hosting services vendor has MD3200. I'm getting significantly worse throughput from MD3200 at my vendors setup. I'm mostly interested in sequential writes, and I'm getting these results in bonnie++ and dd tests: Seq. writes on MD1220 in my office: 1.1 GB/s - bonnie++, 1.3GB/s - dd Seq. writes on MD3200 at my vendor's: 240MB/s - bonnie++, 310MB/s - dd Unfortunately, I could not test the exactly the same configurations, but the two I have should be comparable. If anything, my good performing environment is cheaper than the bad performing. I expect at least similar throughput from these two setups. My vendor cannot really help me. Hopefully, somebody more familiar with the DAS performance can look at it and tell if I'm missing something here and my expectations are too high. To summarize, the question here is it reasonable to expect about 100MB/s of sequential write throughput per each couple of drives in RAID10 on MD3200? Is there any trick to enable such performance in MD3200 with dual controller as opposed to simple MD1220 with a single H800 adapter? More details about the configurations: A good one in my office: Dell R710 2CPU X5650 @ 2.67GHz 12 cores 96GB DDR3, OS: RHEL 5.5, kernel 2.6.18-194.26.1.el5 x86_64 20x300GB 2.5" SAS 10K in a single RAID10 1MB chunk size on MD1220 + Dell H800 I/O controller with 1GB cache in the host Not so good one at my vendor's: Dell R710 2CPU L5520 @ 2.27GHz 8 cores 144GB DDR3, OS: RHEL 5.5, kernel 2.6.18-194.11.4.el5 x86_64 20x146GB 2.5" SAS 15K in a single RAID10 512KB chunk size, Dell MD3200, 2 I/O controllers in array with 1GB cache each Additional information. I've also ran the same tests on the same vendor's host, but the storage was: two raids of 14x146GB 15K RPM drives RAID 10, striped together on the OS level on MD3000+MD1000. The performance was about 25% worse than on MD3200 despite having more drives. When I ran similar tests on the internal storage of my vendor's host (2x146GB 15K RPM drives RAID1, Perc 6i) I've got about 128MB/s seq. writes. Just two internal drives gave me about a half of 20 drives' throughput on MD3200. The random I/O performance of the MD3200 setup is ok, it gives me at least 1300 IOPS. I'm mostly have problems with sequentioal I/O throughput. Thank you for looking into it. Regards Igor

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  • Dvorak hotkey remapping in vim, worth it?

    - by Bryan Ward
    I've been trying to learn the dvorak keyboard layout of late and I have been making some good progress this time around. The trouble I am finding now is that all of my hotkeys are all in the wrong places. As a vim user this is particularly troubling. I have found good resources to switch the bindings back so that they are in the places in vim, but I wonder if this is worth it. I also use set -o vi in my ~/.zshrc file so that I can use the familiar bindings in the terminal as well. hjkl navigation is also featured in a number of other applications such as less. For those of you out there who have successfully made the switch, is it worth remapping things to be familiar again, or is it better in the long run to just deal with weirdly placed hotkeys?

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  • Dedicated NIC or dedicated port for iSCSI?

    - by Newt
    When spec'ing and configuring a machine that will utilise shared iSCSI storage, I've read a lot of documentation which suggests a dedicated network adapter should be used for iSCSI communication. That makes a lot of sense and I have no problem with it. The question I do have, is this - should that suggestion be taken to mean that a separate physical NIC should be used, or will a dedicated port/ports on a dual/quad port NIC be just as good? My suspicion is that simply using dedicated port(s) on a shared NIC would be just as good. Any input greatly appreciated.

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  • Which linux distro for a laptop in windows environmet?

    - by Dev er dev
    I just got new laptop at work. What would you recommend as a linux distribution for it? All other developers are working under windows, and use windows tools. I'm currently using ArchLinux, but want to change it. I don't want to waste time configuring wireless, windows network shares, network pritners, projector, etc ... I want this stuff to just work, while still having sane and stable development evironment and tools. Is Ubuntu a good choice for this? I use gentoo at home, but don't think it is a good match for work environmet. EDIT: Note that we are working on cross platform apps, and deployment platform is almost always linux. There are very few windows apps that I have to use (like MS Project). It is just that everything else is windows centric. I use linux because I feel more productive with it, even if I have to dual boot to edit MS Project files.

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  • How to securely generate memorable passwords?

    - by Tim
    Whenever I need new passwords I use some tools to generate those, preferable memorable passwords, but I've been wondering how secure this might actually be. Using The xkcd random number generator is probably pretty bad, cat /dev/random is probably pretty good, but generating memorable passwords seems a bit more tricky. Whenever a program generates a memorable password, it only uses a subset of the total password space available, and it is not clear to me how big this space is. Of course a long password should help in this case, but if the `memorable' part of the program is too predictable, your passwords are not very good in the end. TL;DR: how secure are memorable password generators, given the fact that `memorable' passwords are a subset of total password space? Some tools I know of: pwgen -- seems ok, but passwords are not too memorable Mac Password Assistant - generates memorable passwords but it is unclear to me how this works.

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  • Fedora-13 not detecting USB HDD enclosure (with HDD)

    - by Ramy
    I recently purchased this enclosure: http://www.amazon.com/Inland-2-5-Inc.../dp/B003SZ2Y12 and this HDD: http://www.amazon.com/Seagate-Barrac...3811667&sr=8-1 Now, I let my brother in law use the enclosure with his 160GB disk to back some stuff up. He then gave me that disk in my enclosure and I backed up my computer and my fiances computer. So...obviously, i had no problem mounting that disk. I plan on keeping this disk as my "natural disaster backup" (in case my apartment building burns down, i still have that disk with my stuff backed up). I want to use the 1.5T disk as my regular/more frequent backup device, but it doesn't seem to be mounting to my F-13 machine. I searched through this forum and found someone advising to run the following: # mount -t vfat /dev/sda1 /mnt this is the output i get when I run that: mount: /dev/sda1 already mounted or /mnt busy mount: according to mtab, /dev/sda1 is mounted on /boot Thing is, shouldn't this disk automatically mount just like the LAST disk in the same enclosure with the same USB cable and power supply? Any help would be greatly appreciated. THANKS!

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  • CORAID using only 1 of the 2 available NICs for AoE traffic

    - by Peter Carrero
    We got 6 CORAID shelves in my workplace. On 2 of them I see AoE traffic on only 1 of the 2 NICs that are attached to the SAN switch. We got jumbo frames enabled on all devices. Both NICs show up when I issue the aoe-interfaces command. This wouldn't bother me too much if the throughput performance observed on the "bad" shelves using bonnie++ wasn't half of the result of the "good" shelves. The "good" shelves are older SR1521 model and they have ReiserFS on their LUNS - not that I think it makes a difference - and the "bad" shelves are newer SR2421 model and have JFS. Any help as to what is going on and how to rectify this would be greatly appreciated. BTW: even the lower performing shelves outperform another iSCSI device we got, but that is another story... Thanks.

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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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  • my Website loss packet in 70% countries, how can i dertermine why its loss packets?

    - by user2511667
    I checked my website on google page speed tester, it show result 90/100. I checked my website on pingdom it shows good result there. When i check my website in cloudmonitor.ca.com, it shows good result in 30% countries and all other countries it show packet loss (100%) How we can determine why my website has packet loss? And what is its solution? Is this problem from my server or from my website? I created new html blank page and set it too my index page, after I tested, it still shows packet loss, guess this means the problem is not in my website. Here is live result When I visit my website in browser, website is working fine. But when i test my domain or IP 198.178.123.219 in command Prompt it shows "Request time out" Why time out in command prompt?

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  • iTunes Home Sharing only works one way between 2 WinXP PC's on the same LAN

    - by scunliffe
    Both PC's have the latest iTunes installed. PC (A) can "see" that there is a shared library "B library" but attempts to connect to it return this error message: The shared library "{Username}'s Library" is not responding (-3259) Check that any firewall software running on either the shared computer or this computer has been set to allow communication on port 3689. however the reverse works fine. e.g. PC (B) can "see" shared library "A library" and can access all content. Notes: Both PC's have Home Sharing enabled (turned off/on several times to verify). Both PC's have Windows Firewall turned on, but in the exceptions tab, iTunes is allowed, and Port 3689 is also added as a firewall exception (just in case) Both iTunes accounts have been "authorized" on both PC's Both PC's connect via LAN via D-Link DIR-615 router. In the advanced application rules, iTunes has also been added to allow traffic on port 3689 un-hindered. Is there any other magical setting/configuration option that I should be aware of and set in order to get this to work? I could care less about sharing apps etc. I just want the music sharing to work. Update: Solved! It turns out on PC (B) there were multiple accounts set up. 1 of the accounts had the checkbox checked under the windows firewall "On" option which states "No exceptions" thus even though it was added to the exception list on the main user account, this other account was blocking access.

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  • BOOTMGR is compressed

    - by JavaAndCSharp
    So I've just finished messing up my computer beyond repair. I originally had a Windows 7 install on my 64GB SSD and all my data on my 1.5TB HDD. So I decided to install Windows 8 Consumer Preview. I tried to clone my 64GB SSD onto my HDD; but that didn't work either at first. I later learned that it wiped all my data off of it. Thank goodness for the cloud. So I retried the cloning after I realized that my data was gone, and I finished it. So I rebooted and got a cryptic error message: BOOTMGR is compressed. Press Ctrl+Alt+Del to restart. So I did. Several times. I followed the instructions to rebuild the bootmanager from many websites, including HowToGeek, smallvoid.com, and more. None worked. BTW, I've lost my Windows 7 Professional DVDs. All I have is my Windows 7 Home Premium DVD. It's the one I got with my laptop. How can I get back to a working computer? I'm willing to wipe anything, as my data is all in the cloud.

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  • Random Hard Freeze of Windows 7 (is Kaspersky to be blamed for this?)

    - by Christian Ivicevic
    The last few weeks I experienced a new strange behavior of my computer. Sometimes Windows 7 just freezes with no real reason at all. While listening to music for example the playback hangs and you can hear a very nasty sound. Neither mouse nor keyboard input is handled and everything is just stuck. Using Ubuntu this does not happen, so I think it is just a matter of driver issues or a Windows 7 bug. Furthermore I am really suspicious about Kaspersky (Internet Security 11) and so I let it perform a complete virus scan while no other app is running. At about 50% it happened again and I needed to restart the computer by holding the power button the bad way... A really weird thing is that playing Skyrim this happened once, however music playback did not stop. Only the framerate dropped to 0 and sometimes for a few seconds I am able to move. Therefore I am really confused as furthermore no bluescreen pops up. Memtest told me that everything seems to be alright... Can anyone explain me which data you need about my hardware and software (and which tools tools to use to gather the informatik) to be able to provide any help on my problem?

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  • Parallel port blocking

    - by asalamon74
    I have a legacy Java program which handles a special card printer by sending binary data to the LPT1 port (no printer driver is involved, the Java program creates the binary stream). The program was working correctly with the client's old computer. The Java program sent all the bytes to the printer and after sending the last byte the program was not blocked. It took an other minute to finish the card printing, but the user was able to continue the work with the program. After changing the client's computer (but not the printer, or the Java program), the program does not finish the task till the card is ready, it is blocked until the last second. It seems to me that LPT1 has a different behavior now than was before. Is it possible to change this in Windows? I've checked BIOS for parallel port settings: The parallel port is set to EPP+ECP (but also tried the other two options: Bidirectional, Output only). Maybe some kind of parallel port buffer is too small? How can I increase it?

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  • Windows 7, network connection with no default gateway: any way to change the "Unknown network" statu

    - by e-t172
    Hi, I have a computer running Windows 7 Pro RTM. This computer has two network connections: A Wi-fi connection to the Internet (through a home router) which works just fine. An OpenVPN virtual network connection. More precisely, this is a virtual Ethernet connection which behaves exactly like a physical Ethernet wired connection. My problem is that the "Network and sharing center" shows "Unknown network" for the OpenVPN connection. After some research I found that logical networks (outside a domain) are identified by the MAC address of the default gateway of the connection. Problem is, the OpenVPN connection has no default gateway: it is a private network, so I don't need one... Consequently, the "Unknown network" is always considered public, so the firewall is always in "public mode", which I don't want. Plus, I can't rename "Unknown connection" or anything (which makes sense), so it is kinda ugly. My goal is to define a proper logical network for the OpenVPN connection with the private profile. I know of some workarounds (disable the firewall, modify security policy to make all unknown networks "private") but they're still workarounds. I just want my clients to connect to the VPN without having to disable their firewall settings, without changing global configuration with potential side-effects (the "security policy" solution) and without having to look at an ugly "Unknown connection" in the Network and sharing center. Is there any way I can do this? I tried to check what was going on in the registry (HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList is interesting), but I still didn't find a way to "force" the OpenVPN connection to be assigned to a logical network. Any help would be very appreciated. A related question showed up at Superuser: http://superuser.com/questions/37355/windows-7-cant-identify-network/37422

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  • Tools to test multicast routing

    - by Zoredache
    I am looking for a good simple tool that runs on a standard OS (Windows or Linux) that I can used to test that multicast is being passed properly by a router. I have been asked by a client to enable multicast routing on a Linux box acting as their router since their phone system requires multicast to for a few features. Since I am not physically near the client I don't really have the ability to experiment with the various methods for setting up multicast routing on Linux. I can setup a router at my desk that is identical to what is deployed on their network, but I don't know of any good simple tools that I can use to generate or listen for multicast traffic. The one mulicast tool I have found is mcast.exe tool which is part of the Windows 2000/2003 resource kit. From what I have read online it seems that mcast.exe does not work across a router, and only works on the local network, so that doesn't seem to be useful for me to test multicast routing. So what do tool(s) do you use to test that multicast routing is properly setup?

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  • How to utilize 4TB HDD, which is showing up as 2.72TB

    - by mason
    I have two internal HDD's. They're both 4TB capacity. They're both formatted with the GPT partitioning scheme, and they're Basic Discs (not dynamic). I'm on Windows 8 64bit. I have UEFI, not BIOS. When I view the discs in Computer Management MMC with Disk Management, they show that each partition is formatted as NTFS and takes up the entire drive. And it shows that each drive has a capacity of 3725.90GB in the bottom section of Disk Management, but 2.794.39GB in the top section. When I view the discs in "My Computer"/"This PC" they only show up as 2.72TB, which matches the amount capacity I'm getting from some other 3TB HDD's I have. Why are they showing up as only 2.72GB? Will I be able to use the full 4TB capacity? Also of note, although I'm not sure it's relevant: I often get corrupted files on these two HDD's. None of my other HDD's give me corrupted files. Usually the problem is fixed by running chkdsk /f on the drives, but it's extremely annoying. In the picture below, it's the X: and Y: drives. Steps I've tried Flashed latest BIOS (MSI J.90 to K.30)

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  • netlogon errors

    - by rorr
    I have two instances of mssql 2005 and am using CA XOSoft replication. The master is a failover cluster and the replica is a standalone server. They are all running Server 2003 sp2 x64. Same patch levels on all servers. This setup has worked great for several months until we recently restricted the RPC ports on both nodes of the master(5000 - 6000 using rpccfg.exe). We have to implement egress filtering, thus the limiting of the ports. We began receiving login errors for sql windows authentication and NETLOGON Event ID: 5719: This computer was not able to set up a secure session with a domain controller in domain due to the following: Not enough storage is available to process this command. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. We also see group policies failing to update and cluster file shares go offline at the same time. The RPC ports were set back to default when we started seeing these problems and the servers rebooted, but the problems persist. The domain controllers are not showing any errors. Running dcdiag and netdiag shows everything is fine. We have noticed that the XOSoft service ws_rep.exe is using a lot of handles(8 - 9k), about the same number that sqlserver is using. As soon as xosoft replication is stopped the login errors cease and everything functions correctly. I have opened a ticket with CA for XOSoft, but I'm not sure that the problem is actually xosoft, but that it is the one bringing the problem to light. I'm looking for tips on debugging RPC problems. Specifically on limiting the ports and then reverting the changes.

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  • Event Log: atapi - the device did not respond within the timeout period - Freeze

    - by rjlopes
    Hi, I have a Windows Server 2003 that stops working randomly (displays image on monitor but is completely frozen), all I could found on the event log as causes were an error from atapi and a warning from msas2k3. The event log entries are: Event Type: Error Event Source: atapi Event Category: None Event ID: 9 Date: 22-07-2009 Time: 16:13:33 User: N/A Computer: SERVER Description: The device, \Device\Ide\IdePort0, did not respond within the timeout period. For more information, see Help and Support Center at http : // go.microsoft.com / fwlink / events.asp. Data: 0000: 0f 00 10 00 01 00 64 00 ......d. 0008: 00 00 00 00 09 00 04 c0 .......À 0010: 01 01 00 50 00 00 00 00 ...P.... 0018: f8 06 20 00 00 00 00 00 ø. ..... 0020: 00 00 00 00 00 00 00 00 ........ 0028: 00 00 00 00 01 00 00 00 ........ 0030: 00 00 00 00 07 00 00 00 ........ Event Type: Warning Event Source: msas2k3 Event Category: None Event ID: 129 Date: 22-07-2009 Time: 16:14:23 User: N/A Computer: SERVER Description: Reset to device, \Device\RaidPort0, was issued. For more information, see Help and Support Center at http : // go.microsoft.com / fwlink / events.asp. Data: 0000: 0f 00 10 00 01 00 68 00 ......h. 0008: 00 00 00 00 81 00 04 80 ......? 0010: 04 00 00 00 00 00 00 00 ........ 0018: 00 00 00 00 00 00 00 00 ........ 0020: 00 00 00 00 00 00 00 00 ........ 0028: 00 00 00 00 00 00 00 00 ........ 0030: 01 00 00 00 81 00 04 80 ......? Any hints?

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  • Can I use this power supply + case combination without causing problems?

    - by evan
    I am putting together a computer with a Antec P180 case and a Thermaltake TR2 RX 650 W power supply. The problem is that the Antec P180 case has a separate compartment for the power supply. With an opening for the on/off switch + ac connector to one side, a wall with a small hole for cables to route through on top, a wall on the bottom, and on the other side a fan which pushes air from the hard drive compartment to the power supply compartment. I think the design of the case assumes the power supplies fan is on the side next to the on/off switch, but the fan on the power supply I have is on top, which makes me worry about overheating the power supply. There is about half an inch between the top of the power supply and the wall and the other fan should keep air flowing to push out the air that the power supply pushes upwards. Do you think this setup should work, or should I go get another power supply? Thanks!! PS: This computer will be running an Ubuntu server, so it will always be on, but the rest of the components shouldn't be generating as much heat as they would on say a gaming machine.

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  • Damaged XenServer Storage LVM partition table

    - by Fiolek
    I have a homeserver running under XenServer control with 3x1TB discs inside, one for XenServer and two mirrored(using Intel's fakeRAID and dmraid) for VMs and a user data(but now I think RAID didn't work). I tried to pass PCI card to VM using PCI-passthroug and I read somewhere that I need to recompile kernel with pciback module but something went wrong(I made mistake in /boot/extlinux.conf and server couldn't run) and I had to use LiveCD of GPartEd(I already had it on USB key) to correct this. But when I re-run the server all VDIs were gone. I have completly no idea what could go wrong. I tried to repair RAID using dmraid -R in the hope that everything will return to noramal but now I think this done more bad than good(and corrupted rest of LVM table...). Is there any possibility to recover this SR or only data from one(~100GB) of VDI? I also wants to apologise for my English, I'm not from English-speaking country and I'm only 16 years old, so I hadn't "time" to learn it(school isn't good place to do this) in sufficient way.

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  • Cursor lag when mouse cursor changes?

    - by Mathias Lykkegaard Lorenzen
    Cursor lag issue Introduction I'm experiencing a newly arrived problem lately that frustrates me a lot. The computer I bought is a Clevo 150ERM. Two of my friends bought the same machine, and are experiencing the same issue. The computer came with Windows 7. There, I had no issues. Then, when we all switched to Windows 8, they had the mouse problem and I didn't. That is until after 4 or 5 months when I decided to install the RTM driver of my Intel graphics chip, and the latest Nvidia driver. I also installed the latest version of Skype that just released (Skype 6 and Skype for Metro). This basically leads me to conclude that the issue is not hardware-prone, and is not based on the operating system itself, rather the drivers or components that follow with it. Description of the issue The issue itself (lag with the mouse) happens whenever the cursor icon changes. For instance, if I keep hovering from and to a textfield (and the cursor changes into a caret and then back to a mouse), it stops for 200 milliseconds while it changes the icon. An example is if I follow the mouse in the pattern shown by the arrows below. When crossing the window border, the cursor changes into a "resize window" cursor for a short while, making the cursor lag. This doesn't sound like much, but it happens every time the cursor changes (even if it's to just move the mouse somewhere else, and accidentally make it cross a window border from where the resize cursor shows etc). What do you suggest I try?

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  • Replicate / SYNC / Copy thousands of files

    - by rihatum
    Windows 32BIT Box (Server OS) 4GB RAM a 800GB LUN Mapped to the above box as a local drive Around 700GB of text files (Yes text files and a few thousand word documents) nested in thousands of directories. I need to move this to a new storage and map another server to it. What would be the best way to go about it ? What I did was mapped the existing LUN to our new box and mapped a LUN from the New storage to the new box too, and tried copying (windows copy) but that wasn't good / fast enough considering the downtime. I am now looking for either a script which will do this or a utility (prefer opensource / free) to move this size of data at a good speed. 2 x 1GB Nics teamed ether channel 2GBPs Any suggestions or pointers would be off great help Thanks !

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