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• Can I get redundancy with a JBOD storage subsystem

  - by Dat Chu

  I have a Promise Technology J610S. This is a JBOD subsystem. Is it possible for me to buy a SAS hardware RAID controller and provide some type of redundancy for these drives? I am unsure whether I will use Linux or Windows yet so an answer with enumeration for both would be highly appreciated. One solution that I thought of was: if my J610s can export each drive as a target, my server will simply see 16 drives. The RAID controller can then perform the RAID5/RAID6 if I want.

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• Why some recovery tools are still able to find deleted files after I purge Recycle Bin, defrag the disk and zero-fill free space?

  - by Ivan

  As far as I understand, when I delete (without using Recycle Bin) a file, its record is removed from the file system table of contents (FAT/MFT/etc...) but the values of the disk sectors which were occupied by the file remain intact until these sectors are reused to write something else. When I use some sort of erased files recovery tool, it reads those sectors directly and tries to build up the original file. In this case, what I can't understand is why recovery tools are still able to find deleted files (with reduced chance of rebuilding them though) after I defragment the drive and overwrite all the free space with zeros. Can you explain this? I thought zero-overwritten deleted files can be only found by means of some special forensic lab magnetic scan hardware and those complex wiping algorithms (overwriting free space multiple times with random and non-random patterns) only make sense to prevent such a physical scan to succeed, but practically it seems that plain zero-fill is not enough to wipe all the tracks of deleted files. How can this be?

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• Still no external sound after installing ubuntu 10.04

  - by Walter

  As suggested I upgraded. Same as before except now not even the speaker control in the application bar. Please help. Background: I have Ubuntu 9.10. Headphones appear to work fine. External speakers - nothing. There are so many sound preferences I have no idea what or which combination. Went to terminal and ran alsamixer which seems to recognize my sound card, though the driver is not listed in System Administration Hardware Drivers; the only driver listed is my graphics card. Setup: I have a Dell 8250. Speakers are plugged into the SB live card. Woofer and 2 speakers using transformer.

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• Windows DFS Limitations

  - by Phil

  So far I have seen an article on performance and scalability mainly focusing on how long it takes to add new links. But is there any information about limitations regarding number of files, number of folders, total size, etc? Right now I have a single file server with millions of JPGs (approx 45 TB worth) that are shared on the network through several standard file shares. I plan to create a DFS namespace and replicate all these images to another server for high availability purposes. Will I encounter extra problems with DFS that I'm otherwise not experiencing with plain-jane file shares? Is there a more recommended way to replicate these millions of files and make them available on the network? EDIT: I would experiment on my own and write a blog post about it, but I don't have the hardware for the second server yet. I'd like to collect information before buying 45 TB of hard drive space...

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• Is HDCP working for ATI/AMD cards on windows 8?

  - by Joel Barsotti

  I have an AMD 6950 and am running windows 8 RTM. I've tried the Catalyst 12.8 drivers and the 12.9 beta drivers. With either drive HDCP seems to be non operational. I've got two dell monitors, one a u2410 and the other a 2408wfp. Both were previously identified as supporting HDCP in windows 7 with the same hardware. I've tested the monitors individual on both DVI and display port, and neither one works. I'm using cyberlinks BD-Advisor to test. My end goal is getting the DirecTv2PC app working again, which is by cyberlink for DirecTV, and requires HDCP. Currently it shuts off when you start playing a recording.

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• xinet vs iptables for port forwarding performance

  - by jamie.mccrindle

  I have a requirement to run a Java based web server on port 80. The options are: Web proxy (apache, nginx etc.) xinet iptables setuid The baseline would be running the app using setuid but I'd prefer not to for security reasons. Apache is too slow and nginx doesn't support keep-alives so new connections are made for every proxied request. xinet is easy to set up but creates a new process for every request which I've seen cause problems in a high performance environment. The last option is port forwarding with iptables but I have no experience of how fast it is. Of course, the ideal solution would be to do this on a dedicated hardware firewall / load balancer but that's not an option at present.

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• Is there a free tool/package that can monitor web traffic and display URLS accessed? [closed]

  - by Anthony

  I couldn't find a similar question but then maybe I am searching for the wrong terms. A few years ago I used a router like device, I'm pretty sure it was a SonicWall, that did this on a clients site. Basically all traffic would be routed through this device and it allowed the manager/administrator to inspect web usage of the workers, determine how often certain resources were accessed and block them if necessary (much like content filter). It showed reports based on domain name reached etc. Facebbok.com, Bebo.com and so on. It also displayed the usual IP traffic information etc. it was a UTM also. I have tried Endian firewall, with it's NTOP install, but I don't think that will show URLs browsed. Maybe I just haven't found it in NTOP yet? I need this to troubleshoot connection and traffic issue at my home, with about twenty devices/users so didn't want to buy a dedicated solution and have spare hardware to use a community product.

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• Need help upgrading MacBookPro3,1 RAM to 4GB.

  - by Fantomas

  My questions are: 1) Where to buy it and what to buy? I have heard that this RAM is generic enough and it does not have to come from Apple. 2) Can I reuse my existing stick(s)? Would I have a single 2GB module, or 2 x 1GB modules? 3) If I have 2GB already, is it a good idea to have one old stick and one new one? Which one is better placed at the top and which one at the bottom? Let me know what questions you have. My computer's info: Hardware Overview: Model Name: MacBook Pro Model Identifier: MacBookPro3,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.4 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 4 MB Memory: 2 GB Bus Speed: 800 MHz Boot ROM Version: MBP31.0070.B07 SMC Version (system): 1.16f11

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• Blocked port 25 on Windows 7 64 bit

  - by Michal Gow

  Strange problem. I have 2 computers connected to Wifi router. One with Windows Vista & second with 2 operating systems: SUSe Linux and Windows 7 64bit on it. Computer with Vista can connect to SMTP server of my email provider (and any other) using port 25, and can connect to a mail server using telnet mail.server.com 25 if this port is open. Computer with dual operating system can (using Linux) do the same. The same computer, with the same hardware (Wifi card etc.), and using the same WiFi router, cannot however use Port 25 and cannot Telnet into any smtp server. So the problem is in Windows 7. I did uninstall all antivirus software and disabled the firewall. The problem is still here. Is there way how find out which software is blocking this port?

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• monitoring load on AWS EC2

  - by hortitude

  I'm interesting in monitoring our EC2 instances to ensure we scale up when necessary. Right now we are monitoring idle CPU time as our metric. We aren't measuring disk IO as we are not a very disk intensive application. When running on our own hardware in a datacenter I also usually monitor "load" from the top command. My question is: Does it make sense to monitor "load" on a shared env such as EC2? If so, how do you interpret the results?

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• Context Menu for Browser to download file to specific folder

  - by elcojon

  There is this website which has customized audio files for me. I would like to save them in a special folder. Now I don't want to select the "special folder" each time in the file-chooser dialogue of my browser. I would rather prefer to have a custom entry in the context menu when I right-click the download link. This context-menu-entry should do the trick and download the file to the predefined "special folder". How would I start about that? I am using Safari and Chrome. So a solution in either browser is fine. To get into the context menu of the browser, what kind of programming do I need to do? Is it an extension, plugin, etc.? Thanks

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• Duplicate name exists solution

  - by user978733

  I have about 70 pc's with exactly same hardware. I decided to automate turning on and off. I took 1 PC. Here is what I've done: Changed bios configuration so that now pc's waking when I turn on AC switch Installed Windows XP and configured so that I can turn off remotelly, changed workgroup name to "WG1", and pc name to "ExamPC" Then created acronis backup image of this pc I installed this image in several PC's and tried to test All worked well till windows opened. The problem is, all tested PC's started Windows nearly at the same time, and all of them popped up error Duplicate name exist. I can't figure out any solution. Any suggestions?

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• Can I write an Excel macro to find product info based on a SKU?

  - by GorillaSandwich

  My coworker wants to create an invoice template in Excel 2007. In column 1, he wants to be able to put in a SKU like '000293954'[1], and when he hits tab, have the other columns fill in a matching description and price. There would be a bunch of different SKUs and information. Has anybody done this type of thing with a macro before? Any advice? (I have programming experience with Javascript, PHP, and Ruby, but have never written a macro.) [1] The input wouldn't be typed - he'd use a wedge barcode scanner that inputs just like it was typed. Not that it matters for this question.

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• All terminal commands (like ls, cd, edit, open) are returning errors on my Mac

  - by park

  From what I can tell from reading other questions/answers is that my .bash_profile file may be corrupt. If I type echo $PATH in terminal the result is: /usr/local/git/bin From what I've read, that's not what the result is supposed to be. But I also can't get any of the commands (like edit or subl, for Sublime Text 2) to open the .bash_profile file to edit it. I was able to open the file in TextEdit using "cmd-shift-.", and here's what's in the file: [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" PATH=$PATH:~/bin export PATH export PATH=/usr/local/git/bin But the file is LOCKED, so I can't edit it there either. I'm very new to programming and in the middle of trying to install everything on my Mac to go through a Ruby on Rails tutorial. I can't even check my version of ruby, since even ruby -v returns -bash: ruby: command not found Any help would be greatly appreciated. Thanks.

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• Windows 8 will only recognize the Blu-Ray drive, if the Windows 8 disc is present at boot time

  - by aceinthehole

  If I have the install disc in the Blu-Ray ROM drive at boot time and subsequently remove the disc and replace it with Blu-Ray media, everything functions as I’d expect. However, if I have no media present, or another disc in the drive at boot time, then Windows 8 does not seem to recognize that the Blu-Ray player is even present in the computer. It is not present in My Computer, the Device Manager does not show the player, and scanning for new hardware yields nothing. It seems that the driver is installed and working as expected, but what is it about having the Windows 8 install disc in the drive or not that would cause this kind of behavior?

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• NVIDIA Driver Crashing on Custom-Built Windows 7 PC

  - by srunni

  I've got a custom-built PC with these specs: Fractal Design Define R3 ASUS P8Z77-V motherboard Intel Core i7-2700k with Thermalright HR-02 Macho Cooler NVIDIA GeForce GTX 560 with Arctic Cooling Accelero Twin Turbo II Cooler Crucial M4 128 GB SSD 1 TB Hitachi HDD G.SKILL Ares Series 2x8 GB RAM (x2) SeaSonic 520W PSU Windows 7 Ultimate SP1 (x64) NVIDIA driver version 301.42 Upon building the PC, I overclocked the CPU (but never the GPU), and there were no problems for 1-2 months. Then I started getting crashes with this error when doing anything that's computationally or graphically intensive: I un-overclocked the CPU, but that hasn't fixed anything. This is what the inside of my case looks like: I'd appreciate any guidance on resolving this problem. I did get some of the thermal paste on the graphics card when installing the aftermarket cooler, but there were no issues for a month or two. Update I did a clean install and the issue persisted - looks like it's a hardware issue. I will try removing/cleaning/reseating all the parts.

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• Windows XP Activation Issues

  - by David

  Related to my older question: Get xp product key from boot Thanks for the help on that one. So, in the end, i couldn't get into my harddrive because i didn't have the available hardware to hook it up to another computer to get the old activation key. So, instead, i entered another activation key (i know, naughty) in hopes that there would be a way to retrieve the old one, restore point or something afterwords. What legal ways can I get xp re-activated after a repair when I don't have any record of my activation key? for those who think im just trying to crack it, your wrong: Got a virus, which stopped me from getting into windows Got AVG Anti Virus, which stopped me from getting into safe mode Got a 2 year old, who decided to rip-off and chew my activation sticker on my computer (nice one). Repaired windows installation thinking i wouldn't be asked to re-enter the activation key, to find that i was.

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• How to use 2 or more internet connections on the same network?

  - by Rogue

  Living in a joint family we have 3 internet connections, each floor has one internet connection which is split per floor. Each internet connection is shared between 4-5 computers using a switch per floor. Each of these internet sharing networks are independent of each other. What I want to achieve here is a local network (for local messenger and file sharing) that can combine all the 3 independent networks, problem is that whenever I try to do that the whole network tends to use just one internet connection. I have all the necessary hardware. How do I solve this problem, one approach could be that I could get one PC to act as a server and bridge the internet connections and then the whole network would have to access the internet through this server. Theoretically this could be possible but I have never tried this approach in real life. Also if certain computers need be restricted from internet access how would this be possible on the same network?

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• Is there a limit on the number of USB external drives?

  - by Beska

  I've got three external HDDs, all My Books, 500 GB, 750 GB, and 1 TB. If I hook one or two of them up to a computer, everything seems fine. If I hook all three of them to a computer (I've tried this on two different computers, one running Windows XP, one running Windows Vista), the bootup time goes up by more than an order of magnitude. It can suddenly take about 10-20 minutes to boot the machine, whereas before it might take a minute. All three drives work fine on their own. I'm not using any kind of hub; all three are plugged directly into the machine. Is this associated with some kind of inherent limit in USB? Is this bad hardware design in the CPU box? Is this a My Book problem?

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• What is causing my internet to be slow on one laptop but not the other and only at a distance?

  - by Matt Case

  I have a newer laptop, purchased within the last year (acer aspire 7740). This laptop does not have any problem connecting to wireless networks and indicates that the signal strength is excellent on most of the wireless networks I connect to. When the laptop is within 10 feet of my wireless router it gets 30 down 10 up. When it is farther away than 10 feet it will be lucky to get 3 down and 1 up. I also have an older laptop, purchased in 2005, that has no problems at all at the same range. None of my phones, gaming consoles or tablets have this problem. I am beginning to think that the problem must be some hardware defect with the wireless card. I can provide additional information if needed. Just thought I'd check to see what others thought because I've been working on computers my whole life and have never heard of this happening. I have also tried to change the channels on my wireless router and have had no success with this idea.

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• Proper way to partition filesystem with Xen

  - by luckytaxi

  I'm coming from a vmware environment, wanting to play with Xen. I have a server with 2 x 500G SATA drives (no hardware RAID available, have to use software-based RAID1). My partitions are all RAID1 except for swap. I left a little over 400G for my VMs and I would like to use LVM for the disk images. For domU's swap, should I allocate that from the 400G or should that be coming from dom0's partition? I asked because I've seen numerous config options that shows either or.

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• Make laptop boot to external monitor

  - by Ozzy

  Hi all. Heres my setup: Dell 1737 2x Dell U2311H The laptop lid is always closed and is wall mounted behind the monitors. Every time i boot the laptop, i have to open the lid a little until it goes to the win 7 logon screen. Once there, i close the lid and both monitors get detected and the laptop screen switches off. As the laptop is wall mounted how ever, its really tedious to keep opening and closing the lid. Is there any way i can make it default to the external monitors permanently? Any suggestions are welcome, even hardware mods. Im willing to rip apart the laptop to install a switch or something if needs be lol

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• PC cannot see Clonezilla server when using PXE Boot

  - by r2b2

  Hi I have about 15 workstations, all have the same hardware specs so I figured clonezilla is perfect for cloning them. So I followed everything this guide says :cloning groups of school computers That guide above makes it all look easy but when I tried setting up Clonezilla Server Edition on my laptop (Kubuntu 10.10) and configured the master computer for PXE boot, the master computer could not see the Clonezilla server. It just shows 'DHCP...' which seems it trying to grab an IP address but to no avail. Please help. Thanks!

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• Dropbox.py on RHEL 6

  - by Timothy R. Butler

  I'm trying to run a headless install of Dropbox on RHEL 6. The daemon seems to be running, but when I try to use Dropbox's associated dropbox.py tool to control the daemon, it fails to run with the following error: Traceback (most recent call last): File "./dropbox.py", line 26, in <module> import locale File "/usr/lib64/python2.6/locale.py", line 202, in <module> import re, operator ImportError: /home/dropbox/.dropbox-dist/operator.so: undefined symbol: _PyUnicodeUCS2_AsDefaultEncodedString I'm running the current RHEL build of Python 2.6: root@cedar [/home/dropbox/.dropbox-dist]# rpm -qv python python-2.6.6-29.el6_3.3.x86_64 (I'm not sure if this would be better suited to Stack Overflow since it is on the verge of being a programming issue, but since I'm trying to use a program straight from Dropbox, I placed it here.)

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• How does a winkydink Teradici offer high res, full FPS, 3D rendering on ESXi 5 VDIs for AutoCAD/SolidWorks/1080p YouTube applications?

  - by BlueToast

  How does such a small Teradici card ![enter image description here][1] offer high resolution, full FPS 3D graphics (1:38) http://www.youtube.com/watch?v=eXA4QMmfY5Y&feature=player_detailpage#t=97s for ESXi 5.0/5.1 VDI environments? We're shooting for an AutoCAD/SolidWorks/YouTube 1080p capable environment. I can't see how such a small and low profile card could possibly have the horsepower to handle such GPU computations for a big environment like that. We're going to have up to 64 VDIs per server, and are a 500-1000 employee count sized company. Someone enlighten me please! Determining which route to go (between RemoteFX and VMware View/PCoIP) and the hardware (NVIDIA 4GB non-Quadro/Tesla GPUs vs Teradici card). Servers have three 4x, three 8x, and one 16x PCI-E lane. Two of the 8x lanes will be occupied by SAS RAID cards.

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