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  • Why can I not access the internet when Windows 7 finds no issue with the ethernet connection and the network can see my device?

    - by WannabeCoder
    So I just moved from a house to an apartment. In the house and the apartment I had Uverse set up - and in both I had my desktop connected via a ~40 foot long cat5 cable. However, upon moving to the apartment I found that my ethernet connection no longer provides internet. This would seem like a mundane problem if not for: The router can see the computer on the network Windows 7 (the desktop's OS) detects no problems with the ethernet connection. Connections over the internet (i.e. browser windows, Pandora, etc.) do not immediately fail. Instead they load for 2 minutes and then finally give up. Devices connected over the Wifi (PS4, Laptop) access the internet just fine While removing the cat5 cable from my house, I accidentally damaged the locking tab but managed to bend it back into the appropriate position. I would suspect that a bad cat5 cable might be to blame if not for the above issues (thought I've heard bad cat5 cables cause the most nonsensical problems) and the fact that I tested the cat5 cable by having it share internet between my laptop (working internet) to my desktop and it functioned just fine and provided the desktop with internet. My ipconfig /all successfully finds a default gateway, DHCP server, and DNS server. What could possibly be causing the problem?

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  • Hard Disk:S.M.A.R.T. Stas BAD, Back up and replace

    - by Nick
    I have an laptop top hard drive I was trying to use to my new media computer. The case is small and can accommodate for 2 2.5" drives, no 3.5" drives. I had been using the hard drive as storage hard drive until now. When I go to install Windows on the hard drive first I'm prompted at the bios of: Hard Disk:S.M.A.R.T. Stas BAD, Back up and replace. And then again in the Windows Setup, informing me that the hard drive is bad. So I did a full format of the drive and tried again. Same error. So I took it out and hooked it back up to my other computer via an Sata usb adapter kit (maybe the cause?). The hard drive is recognized fine and when I scanned it for errors by going: right click -> properties -> tools -> error checking It returns that the hard drive is fine. I have tried 3 different SATA cables and multiple jumpers. When I plugged in my 1.5 tb 3.5" drive the computer that gives me the S.M.A.R.T. error on the 2.5" drive, recognizes it with no problems. Any ideas on why this is happening and how I can fix it?

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  • How to wire 20 computers and 20 phones and 1 server into LAN?

    - by John Smith
    I have currently 3 switches Two Netgear JFS524 with 24 slots, One Belkin with 16 slots. Server DSL Internet Router. Main question is how to connect switches together, two Netgear's are next to each other, yet one is about 100 feet away and holds about 5 computer and 5 phones. If i connect them with only 1 wire will that limit bandwidth? e.g. all 23 computers will be limited to speed of one CAT5e cable? If i connect switches with 2 cables will this give speed boost? What's the ideal scenario should i just move the third switch next to other two? Will the speed of computer connected to white switch be same as computer connected to top switch? Will moving white switch right next top switch and having 16 wires comming 100 feet instead of 1 wire comming 100 feet make it faster? EDIT 1: I actually have NETGEAR ProSafe GS105 Gigabit switch its only has 4 ports in it though, you think i can have use of it in current setup? Like connect all 3 switches and server into it and keep internet router and phone server on one of the slower switches EDIT 2: Everyone mention gigabit switches, but will they do any difference with 10/100 network cards? I then have to use gigabit cards in every computer too? I could in server perhaps, but users will be 10/100

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  • Reinserted a RAID disk. Defined as foreign. Is import or clear the correct choice?

    - by Petrus
    I have re-inserted a RAID disk, on a DELL server with Windows Server 2008. The drive-status indicator was changing between a green and amber light, and the monitor gave the following message: There are offline or missing virtual drives with preserved cache. Please check the cables and ensure that all drives are present. Press any key to enter the configuration utility. I pressed a key and the PERC 6/I Integrated BIOS Configuration Utility showed that the RAID Status for that disk was Offline. After reinsertion of the disk the monitor is giving the following message: Foreign configuration(s) found on adapter. Press any key to continue or ‘C’ load the configuration utility, or press ‘F’ to import foreign configuration(s) and continue. After checking around on the net I am uncertain if I should choose import or clear. I cannot find out if an import means importing information from the array/system to the now foreign disk or the other way, i.e. importing information from the foreign disk to the array/system that was actually working fine. Also; if clear is a necessary thing to do ahead of a rebuild of that disk, or if clear means to clear the system to somehow make it ready to import the information from the foreign disk to the array/system, which is not what I want. I imagine that making the wrong choice here might be fatal. Please help clearing this out by telling what to choose and why.

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  • Splitting HDMI sound to 2 devices under Windows 7

    - by Jeramy
    Okay, this is a strange set-up and is frustrating me. I have an HDMI signal from my PC being split to my audio receiver and my HDTV. I need to split it to both so that I can choose to either play audio from the HDTV or from the surround sound speakers in the room. The problem that I am having is in Windows 7, the output is listed under "Playback Devices" and is auto-populated with the HDTV, which only has the option for stereo sound. If I unplug the HDTV from the splitter it will populate with my receiver information and let me set it to 5.1 surround, but as soon as I plug the HDTV back in it reverts. I tried reversing the order of the HDMI cables in the splitter and this seemed to work for a short while, then Windows must have polled the devices again or something because it reverted. It will work as long as Windows identifies the reciever, thereby unlocking the 5.1 surround option, otherwise I am stuck with stereo, which it assumes is all the HDTV is capable of. Is there a way to manually override this and set my own options? Or any other solutions?

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  • Apple Service Diagnostic application on USB key?

    - by Matt 'Trouble' Esse
    I found the following in a text file, and I would like to use the Apple Service Diagnostic Application from a bootable USB key but I cannot find where to download it or set it up? Also is this free software or does it require a separate licence? It sounds like it would be a useful tool for diagnosing Mac problems. The Apple Service Diagnostic application is designed to run both EFI and Mac OS X tests from an external USB hard drive. Apple Service Diagnostic (EFI) runs low-level tests of the hardware directly and does not require Mac OS X, while Apple Service Diagnostic (OS) uses Mac OS X to run tests. Booting and Using the Apple Service Diagnostic Application - Before using Apple Service Diagnostic, disconnect any Ethernet network, USB, and audio cables. - With the USB hard drive containing ASD 3S123 plugged into a USB port, restart the computer and hold down the option key as the computer boots up into the Startup Manager. To run ASD (EFI) select the "ASD EFI 3S123" drive icon and press return or select it with a mouse click. To run ASD (OS) select the "ASD OS 3S123" drive icon and press return or select it with a mouse click. ASD (EFI) will load in 20-30 seconds; ASD (OS) will load in 2-3 minutes. - After running ASD (OS) or ASD (EFI), press the Restart button to restart the computer back into the normal startup volume, or hold down the option key to get back to the Startup Manager. ASD is no longer delivered as an image to be restored onto a DVD. ASD 3S117 and newer versions requires installation onto an external USB hard drive. For more information, please refer to the document "Installing ASD on a USB hard drive".

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  • Hints on diagnosing performance issue in OpenBSD firewall

    - by Tom
    My OpenBSD 4.6 pf firewall has started having really bad performance in the past few weeks. I've isolated the firewall (as opposed to the WAN connection, switch, cable, etc.) as the problem, but need a hint on how to further diagnose or fix the problem. The facts: Normal setup is: DSL Modem - FW Ext. NIC - FW Int. NIC - Switch - Laptop Normal setup described above gives only 25 Kbps! Plugging the laptop straight from the DSL modem gives a 1 MBps connection (full speed, as advertised). Therefore, the DSL connection seems to be OK. Plugging the laptop directly into the firewall's internal NIC (bypassing the switch) also gives only 25 Kbps. Therefore, the switch does not seem to be a problem. I've replaced the ethernet cables, but it didn't help. Here's the weird thing. Reloading the ruleset (/sbin/pfctl -Fa -f /etc/pf.conf) causes the laptop's connection to go up to 1 Mbps (i.e. full speed) for a few minutes before it gradually degrades back down to 25Kbps again. Any ideas on what's wrong or how I could further diagnose the problem?

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  • LCD monitor flicker when connected to a laptop using VGA

    - by Björn Lindqvist
    I have a dual screen setup with two AOC e2450Sw monitors connected to a laptop. The laptop has one HDMI and one VGA output. When one of the monitors is connected using VGA, it flickers or displays static noise. The flickering is fairly subtle and only visible on darker colors. But it is there and noticable and appears like horizontal lines. The problem only appears on the monitor connected to the laptop using the VGA cable. If I swap the monitors, the one connected using VGA is displaying the flicker but not the one connected using HDMI. The simple solution would ofcourse be to connect both monitors using HDMI, but since the laptop only has one VGA and one HDMI out that isn't possible. I've tried tweaking the monitor setting using the OSD menu, but it had little or no effect. Update: After several more trouble shooting hours, it seems the problem is not related to the monitor or VGA cable as the problem persists even if I swap the display with another brand and different cables. So it may be the graphics card? Intel HD Graphics 4000. The laptop is Acer Aspire E1-571.

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  • Enabling AHCI in BIOS for SSD

    - by Robert
    I am trying to help a friend with a desktop upgrade. It is an old machine with an Intel DG31 main board. The board has 1 IDE port to which a DVD-ROM drive is connected, and 2 SATA ports. 1 SATA port had a hard drive with XP on it. I have made that the secondary drive now and wiped the OS as requested, so it is just for data. The new SSD has been installed but I read that for best results one must enable AHCI in the BIOS? So I checked and in the BIOS there is a SATA Mode setting with 2 options - Native and Legacy. I think Native means AHCI? After setting to Native, I installed Windows 7 Home Premium and all the latest drivers from Intel's website and all Windows Updates. Now when I check Device Manager I see this: Also Microsoft says HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci\Start and HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV\Start should have value 0 for AHCI but I see that the value is 3 for both. So does this mean that Native mode is not AHCI? Or Windows 7 ignored BIOS setting and installed in IDE mode, maybe because both cables are present? Please help me enable AHCI on this system. Thanks!

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  • SATA HDD not recognized by BIOS after Windows 7 reinstall

    - by RoliSoft
    I got Win32.Virut.56 virus, which is a very nasty stuff. I reinstalled my Win7, but it reappeared somehow. After hours of headache, I was able to remove it by booting into a live Ubuntu and running CureIT using Wine. I then started reinstalling Windows 7. After the "expanding files" stage it rebooted, however from that point on, my 160 GB Western Digital SATAII hard drive was not recognized. The bios just freezes at "SATAII 1: Detecting...". My other 1.5 TB Seagate SATAII hard drive works correctly. I tried switching cables; that didn't help. I googled this issue, but what came up were usually firmware problems. I can't update the firmware or do anything at all, because if I plug it in, it won't start. My motherboard is an ASRock 4Core1333-Viiv, if that helps. I'm now stuck on a live Ubuntu. I can't install Win7 on the 1.5 TB drive, because it's full of data I need. What do you think I could try to make the hdd work again? As for the moment, I don't have another computer to try if that one recognizes the hdd.

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  • Can't connect to samba

    - by Rick
    Windows 7, connecting to Samba shares I have a follow up question from the link above. I am running Samba 3.0.23d on FreeBSD is release 7.1 I changed the policies as described above but still cannot connect to the samba server with the windows 7 or a server 2008. I feel it is a problem with recognizing the new machines on the network. the windows machines can see the samba server, but cannot connect to it or view any of the files. After changing the security policies the samba server asked for network id and password but would not allow the machine to connect, said they were unknown username or bad password. Here is my current config file. there is no sign of encryption anywhere, should I just add the line? not sure what that would do elsewhere. Workgroup = WWOFFSET server string = WWO File Server (%v) security = server username map = /usr/local/etc/smb.users hosts allow = 10. 127. # If you want to automatically load your printer list rather # than setting them up individually then you'll need this ; load printers = yes # you may wish to override the location of the printcap file ; printcap name = /etc/printcap # on SystemV system setting printcap name to lpstat should allow # you to automatically obtain a printer list from the SystemV spool # system ; printcap name = lpstat # It should not be necessary to specify the print system type unless # it is non-standard. Currently supported print systems include: # bsd, cups, sysv, plp, lprng, aix, hpux, qnx ; printing = cups # Uncomment this if you want a guest account, you must add this to /etc/passwd # otherwise the user "nobody" is used ; guest account = pcguest # this tells Samba to use a separate log file for each machine # that connects log file = /var/log/samba/log.%m # Put a capping on the size of the log files (in Kb). max log size = 50 # Use password server option only with security = server # The argument list may include: # password server = My_PDC_Name [My_BDC_Name] [My_Next_BDC_Name] # or to auto-locate the domain controller/s # password server = * ; password server = <NT-Server-Name> password server = SERVER0 # Use the realm option only with security = ads # Specifies the Active Directory realm the host is part of ; realm = MY_REALM # Backend to store user information in. New installations should # use either tdbsam or ldapsam. smbpasswd is available for backwards # compatibility. tdbsam requires no further configuration. ; passdb backend = tdbsam ; passdb backend = smbpasswd # Using the following line enables you to customise your configuration # on a per machine basis. The %m gets replaced with the netbios name # of the machine that is connecting. # Note: Consider carefully the location in the configuration file of # this line. The included file is read at that point. ; include = /usr/local/etc/smb.conf.%m # Most people will find that this option gives better performance. # See the chapter 'Samba performance issues' in the Samba HOWTO Collection # and the manual pages for details. # You may want to add the following on a Linux system: # SO_RCVBUF=8192 SO_SNDBUF=8192 socket options = TCP_NODELAY # Configure Samba to use multiple interfaces # If you have multiple network interfaces then you must list them # here. See the man page for details. ; interfaces = 192.168.12.2/24 192.168.13.2/24 # Browser Control Options: # set local master to no if you don't want Samba to become a master # browser on your network. Otherwise the normal election rules apply ; local master = no # OS Level determines the precedence of this server in master browser # elections. The default value should be reasonable ; os level = 33 # Domain Master specifies Samba to be the Domain Master Browser. This # allows Samba to collate browse lists between subnets. Don't use this # if you already have a Windows NT domain controller doing this job ; domain master = yes # Preferred Master causes Samba to force a local browser election on startup # and gives it a slightly higher chance of winning the election ; preferred master = yes # Enable this if you want Samba to be a domain logon server for # Windows95 workstations. ; domain logons = yes # if you enable domain logons then you may want a per-machine or # per user logon script # run a specific logon batch file per workstation (machine) ; logon script = %m.bat # run a specific logon batch file per username ; logon script = %U.bat # Where to store roving profiles (only for Win95 and WinNT) # %L substitutes for this servers netbios name, %U is username # You must uncomment the [Profiles] share below ; logon path = \\%L\Profiles\%U # Windows Internet Name Serving Support Section: # WINS Support - Tells the NMBD component of Samba to enable it's WINS Server ; wins support = yes # WINS Server - Tells the NMBD components of Samba to be a WINS Client # Note: Samba can be either a WINS Server, or a WINS Client, but NOT both ; wins server = w.x.y.z # WINS Proxy - Tells Samba to answer name resolution queries on # behalf of a non WINS capable client, for this to work there must be # at least one WINS Server on the network. The default is NO. ; wins proxy = yes # DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names # via DNS nslookups. The default is NO. dns proxy = no # charset settings ; display charset = ASCII ; unix charset = ASCII ; dos charset = ASCII # These scripts are used on a domain controller or stand-alone # machine to add or delete corresponding unix accounts ; add user script = /usr/sbin/useradd %u ; add group script = /usr/sbin/groupadd %g ; add machine script = /usr/sbin/adduser -n -g machines -c Machine -d /dev/null -s /bin/false %u ; delete user script = /usr/sbin/userdel %u ; delete user from group script = /usr/sbin/deluser %u %g ; delete group script = /usr/sbin/groupdel %g unix extensions = no

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  • Audio card with built-in ground isolator?

    - by Dave Jarvis
    What audio cards would you recommend that eliminate hum, and hard-drive & mouse movement signal interference? Hardware components: Motherboard. Asus P5Q SE Audio. Realtek ALC 1200, 8-Channel High-Definition Audio CODEC (on board) Harddrive. WD Caviar 320 GB Mouse. Logitech Marbleman USB Mixer. Mackie d.4 Pro Amplifier. Sonance Sonamp 260 All components are plugged into the same Monster Power HDP 910 powerbar (does not help eliminate noise). I have no other components plugged in. The computer uses a Monster iCable 1000 to go from mini (on board audio) to RCA (mixer). I have moved the cable as far from other cables as possible. A ground loop isolator between the mixer and on board audio eliminates all noise. I would rather not use a ground loop isolator; an internal audio card that is Linux-compatible (Kubuntu) would be ideal. Suggestions?

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  • WD my cloud 4th is Super Slow

    - by Saduser
    I am using a WD my cloud 4Tb and I have read other posts about users complaining about getting only 10Mb per second. My problem is that I am getting about 100kb/s to transfer a 125gb iPhoto library. Estimated time is 11 days to transfer this file. This is unacceptable. On the back of the WD cloud I am getting a solid green light and from what I read this means that I am on a gigabyte network. I have mac book pro running Mac OS Mavericks. I have tried 4 different cables and turned off my router firewall. I don't run anti-virus nor any firewall on the mac. Other things I have checked: direct connection to both router and WD cloud device. Tried wireless but it is even slower. Previously I was able to transfer a 55Gb iPhoto library in 14 hours which I felt was acceptable. I figured it would take approximately double the time to transfer the 125gb file but 11 days is ridiculous. Any other suggestions? Anything else I can check (how to check it) what is the bottle neck?

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  • Setup for a live (low-latency) audio video broadcast over Wi-Fi?

    - by Majal Mirasol
    The Upgrade We are capturing audio (from mixer) and video (from a camera) from a main auditorium and passing it to separate rooms within the building. We used to have done this via manual audio/video cables and wires. We wanted to "upgrade" the system and wirelessly broadcast the stream via Wi-Fi. The Problem In our current setup (Wirecast running on A10 on a Wireless-N network), we have the problem of delay. Our streams are delayed from a minute up to five minutes on the clients (laptop/iPad/Android). This had not been a problem from the previous wired connections. Since the wireless network is local, we thought that a delay of less than a second should be achievable. Our Question And so it goes. Anybody there who has any experience for a setup that has both low latency and at the same time user-friendly to clients streaming in the program? Any recommendations would be highly appreciated. (Our current setup in on Windows 7, but setup on a dedicated Linux box is preferred, if achievable.)

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  • Why does just splitting an Ethernet cable not work?

    - by Sin Jeong-hun
    I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why would splitting one Ethernet line from my home router into two and connecting two computers not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room, and I had put a computer in another room (also my room, though). Since a wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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  • TV-out worked, now doesn't. May the problem be the cable, TV, driver, OS, graphic card?

    - by Petruza
    I have a CRT TV hooked to the PC, which once worked great, now doesn't. I can't consider getting a newer TV, this one is used in an MAME arcade cabinet so it has to be a CRT for best old school look and feel. It's connected through the TV-out connector of my graphic card. When it worked, I had Windows XP, the same PC and the same card. Now I have windows 7, not sure if the OS switch caused the malfunction as I don't use the TV-out all the time. Can it be an upgrade of the Nvidia driver? I thought it may be the S-video to RCA cable, but tried 3 different cables and neither worked. In fact, one of them, that unlike the other two, has a single RCA output connector instead of two, behaves differently, although it doesn't work, but it does the following: When I open the NVidia settings panel, or when I change a setting and click Apply then the TV flashes for a split second and you can see the windows screen, but then it goes back to blank. So any clues what can be failing here, and some advice? Possible failures, please comment on the one you suspect the most: NVidia driver version Windows version Cable Graphic card's TV out other?

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  • Why are SMART error rates going down?

    - by Jeff Shattock
    I have a hard drive that's part of a Linux software raid5 array. SMART has reported that its multi_zone_error_rate was 0, then 1, then 3. So I figured I better start backing up more frequently and prepare to replace the drive. Now, today, the multi_zone_error_rate of that very same drive is back down to 1. It seems that 2 errors unhappened while I wasn't looking. I've also seen simliar behaviour by inspecting the syslog on the server. Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 8 02:31:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 These are raw values, not the human-useful values that smartctl -a produces, but the behaviour is similar: error rates changing, then undoing the change. None of these are the drive that had the multi_zone weirdness. I haven't seen any problems from the RAID; its most recent scrub ( < 24 hours ago) came back totally clean. The only thing I can think of is that the SMART reporting circuitry on the drive isn't working properly all the time. The cables are in tight on the drive and board. What's going on here?

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  • how does a computer know which IP address will route information to the internet? [closed]

    - by JohnMerlino
    Possible Duplicate: How does IPv4 Subnetting Work? For example, I have a computer with a Network Inteface Card (NIC) which is an Ethernet card that is connected by Ethernet cables to a router. There is also another computer with a cable that is connected in another port of the router. This is a Belkin router operating over an Ethernet in the LAN. When I connect to serverfault.com, it maps to an IP address. My computer now has a task of connecting to that IP address. But my computer itself cannot connect to the serverfault IP address. Only the router can. So the task of my computer is to find the IP address associated with the node that will do the routing to the public internet. How does my computer know that a particular IP address in the local network belongs to the router, and is not another computer connected to the network? Is this information configured manually in the operating system itself? Somehow my computer must know that it must send ethernet frames to the router with the expectation that the router will then send the packet to a public IP. How does it know to send it to the router? Is the router's ip address stored in my computer like a key/value pair e.g. "router"="192.168.2.6", so that when I put a public ip address, my computer first knows to connect to 192.168.2.6?

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  • Is encryption really needed for having network security? [closed]

    - by Cawas
    I welcome better key-wording here, both on tags and title. I'm trying to conceive a free, open and secure network environment that would work anywhere, from big enterprises to small home networks of just 1 machine. I think since wireless Access Points are the most, if not only, true weak point of a Local Area Network (let's not consider every other security aspect of having internet) there would be basically two points to consider here: Having an open AP for anyone to use the internet through Leaving the whole LAN also open for guests to be able to easily read (only) files on it, and even a place to drop files on Considering these two aspects, once everything is done properly... What's the most secure option between having that, or having just an encrypted password-protected wifi? Of course "both" would seem "more secure". But it shouldn't actually be anything substantial. I've always had the feeling using any kind of the so called "wireless security" methods is actually a bad design. I'm talking mostly about encrypting and pass-phrasing (which are actually two different concepts), since I won't even consider hiding SSID and mac filtering. I understand it's a natural way of thinking. With cable networking nobody can access the network unless they have access to the physical cable, so you're "secure" in the physical way. In a way, encrypting is for wireless what building walls is for the cables. And giving pass-phrases would be adding a door with a key. So, what do you think?

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  • Is current SATA 6 gb/s equipment simply unreliable?

    - by korkman
    I have a 45-disk array of Seagate Barracuda 3 TB ST3000DM001 (yes these are desktop drives I'm aware of that) in a Supermicro sc847 JBOD, connected via LSI 9285. I have found a solution for the problem description below by reducing speed via MegaCli -PhySetLinkSpeed -phy0 2 -a0; for i in $(seq 48); do MegaCli -PhySetLinkSpeed -phy${i} 2 -a0; done and rebooting. The question remains: Is this typical for current 6 gb/s equipment? Is this the sad state of SATA storage? Or is some of my equipment (the sff-8088 cables come to mind) bad? The Problem was: Synchronizing HW RAID-6, disks kept offlining. Fetching SMART values reveiled that those which offlined did not increase powered-on hours anymore. That is, their firmware (CC4C) seems to crash. Digging into the matter by switching to Software RAID-6, with the disks passed-through, I got tons of kernel messages scattered across all disks, with 6 gb/s: sd 0:0:9:0: [sdb] Sense Key : No Sense [current] Info fld=0x0 sd 0:0:9:0: [sdb] Add. Sense: No additional sense information And finally, when a disk offlines: megasas: [ 5]waiting for 160 commands to complete ... megasas: [35]waiting for 159 commands to complete ... megasas: [155]waiting for 156 commands to complete ... megaraid_sas: pending commands remain after waiting, will reset adapter. Ugly controller reset here, then minutes later: megaraid_sas: Reset successful. sd 0:0:28:0: Device offlined - not ready after error recovery ... sd 0:0:28:0: [sdu] Unhandled error code sd 0:0:28:0: [sdu] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK sd 0:0:28:0: [sdu] CDB: Read(10): 28 00 23 21 2f 40 00 00 70 00 sd 0:0:28:0: [sdu] killing request Reduced speed to 3 gb/s like written above, all problems vanished.

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  • SATA Windows 7 Problems

    - by Isaacs
    Scenario: Core 2 Duo processor, Gigabyte MB, 4 SATA Western digital 500 GB hard drives, windows 7 64 bit. Problem: Copying data from USB or among SATA hard drives is faulty. When trying to copy 20GB from one HD to another it starts off with normal ~14-15 MB/s transfer rates and eventually bogs down to < 120KB/s transfer rates. If I leave it alone over night I come back with my computer crashed and setting at BIOS detecting hard drives. Troubleshooting: Removed all but 1 HD with OS on it, everything seems to be happy. I can copy large files from USB HD to main/single HD. Ran SpinRite on all hard drives, no errors found. Tried adding one HD to machine and problem exists, tried switching SATA cables, and SATA ports on MB. Reinstalled windows 7 x2 (from different disks..). Oddly enough if I boot to a ubuntu everything works fine. Getting ready to purchase a new MB, but wanted to see if anyone had suggestions. Thanks!

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  • Triple-monitor set-up (2 unique, 1 cloned): Can a VGA splitter be used on one output of a dual-head

    - by stakx
    Background: I'm currently researching hardware components for some kind of information terminal we're building. This application of ours makes use of three output screens: (1) A touch screen where all user input is made; (2) A regular LCD monitor where the requested information is being displayed; and (3) A projector which displays exactly the same signal as screen (2) does. (All screens will run at the same resolution of 1024x768 btw.) Now I figured that using a dual-head video card would be sufficient, let's say a Matrox P690 low-profile PCI card. This would involve having a Y cable connected to the graphics card itself, then two DVI-to-VGA adapters at each end of the Y cable, and then having a VGA splitter on one of the VGA outputs. The following shows the setup in question: 0--1---------2-> VGA (DSUB-15) \ \ ----2-3---------> VGA (DSUB-15) \ \ -----------------> VGA (DSUB-15) 0: graphics card (LFH60 jack) 1: LFH60 to DVI-I dual monitor Y cable 2: DVI-to-VGA adapters 3: VGA splitter cable Question(s): Will this work? I'm particularly concerned about the following points: Can a low-profile PCI video card output a signal which is strong enough for three monitors (even if it's a dual-head card)? Does the combination of so many adapters and splitter cables work? (The LFH-to-DVI cable comes with the video card) Will the VGA splitter cable degrade the signal on the output screen & projector significantly? (If so, would a USB-powered splitter cable remedy this problem?) I can't possibly expect anyone to answer all those questions, but any input is appreciated.

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  • How can I wipe my iPod classic and fix any bad sectors on the hard drive without killing it?

    - by Sam Meldrum
    My iPod never finishes syncing and only syncs audio, not pictures or video - any ideas as to how I can fix it? My iPod classic 160GB worked well for a couple of years. I used to sync a lot of photos at full resolution to it, but this recently stopped working after I moved to Windows 7. iTunes is on latest version - 9.1.1.12 iPod software is up to date - 1.1.2 Windows 7 is fully up to date and patched The symptoms are that the iPod will start to sync, all audio (music and podcasts will sync successfully) but the syncing will then just appear to continue - itunes message: Syncing iPod. Do not Disconnect. This sync never completes - I have left it trying for days. I have tried resetting the iPod using the Restore button, whereupon it restarts sync from default options and again will sync audio, but nothing else. I suspect that something has gone wrong on the hard-drive - either a bad sector or some corrupt data. Is there a process I can go through to fix this? E.g. SpinRite or a format? If so how do I go about formatting an iPod and will it be recognised as an iPod after format and work as normal? Any advice on what to try next much appreciated? Update I have eliminated problems with the files, PC or iTunes as they sync fine to other iPods. I have also eliminated the cable by trying different cables which work with other iPods. What I'd really like to know is if there is any way to more fundamentally wipe the iPod safely, attempt to repair any bad sectors on the hard drive and then start from scratch. Anyone ever managed this?

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  • 10Gbe sfp+ Cross Over Cable required? Is there such a thing?

    - by dc-patos
    To preface, this is my first experience with 10GBe networking and I have encountered an issue which research does not seem to document a solution for... I have two servers (older DL580G5 and DL380G5), each with a HP NC522SFP 10Gbe dual sfp+ port adapter. I have purchased copper "passive" direct connect adapter cables (which look like twinax), which seem to work well when I connect them to the sfp+ ports on my Dell 5524 switch. However, if I directly connect the two servers with the same cable, the link doesn't come up. I am running WS2012 standard on each server. My intention is to use one of these servers as a home brew SAN and I would like to enable mutiple 10Gbe paths for iSCSI traffic. My question(s): Can I connect the two adapters to each other, such as I would with other less speedy generations of ethernet? If I can, do I require a crossover cable, or some type of other sfp+ cable solution to do this? My 10Gbe sfp+ switch ports are premium, but server to server connections are doable in small numbers for me and I would really like the multiple paths this would give me. Is there a simple solution?

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  • Dell 2970 - HP 1/8 G2 autoloader keeps falling off LSI 2032 SCSI chain

    - by middaparka
    I've a somewhat irritating problem with a Dell 2970 that has a HP 1/8 G2 autoloader (the Ultrium LTO 2 model) attached to the Dell/LSI 2032 non-RAID SCSI card. In essence, sometimes the autoloader/drive completely fails to appear on the SCSI chain (i.e.: there's neither a media changer or tape drive present within the device manager) and sometimes it appears but then subsequently disappears at a seemingly random (yet always inconvenient) time, resulting in backup failures. On most occasions, there are simply no errors logged in the system event log, but I did manage to capture a series of LSI_SCSI event ID 11 ("The driver detected a controller error on \Device\RaidPort0") errors followed by an event ID 129, ("Reset to device, \Device\RaidPort0, was issued") error during testing. I've tried two different cables, both with the same effect – sometimes the autoloader appears (for a while), sometimes it's completely absent. There's only one terminator I've tried to use, but as I've since successfully tested the autoloader on multiple occasions (albeit via a Adaptec U160 card on a different machine), my gut feel is that the issue doesn't lie with the terminator, or indeed the autoloader itself. As such, I'm just wondering if anyone has any ideas? It's most likely not relevant, but this is all under Windows SBS 2008, running Backup Exec 12.5 SBS edition (the Dell version), both fully patched. Addidtionally, the autoloader is running the latest firmware. It's been a while since I've dealt with anything SCSI, so all suggestions will be gratefully, gratefully received.

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