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• Recommendations for stable, reliable flash drives

  - by Josh Kelley

  We're looking to purchase some flash drives for use in some embedded devices. Most of our requirements aren't too different the generic "good, fast" flash drive: reliability is very important, speed is good, and so that the drive will fit, the case shouldn't be too large (so no OCZ Throttles). Consistency is also a major priority; we'd like to be able to buy more or less the same product a year or two from now without having to worry about the manufacturer swapping drive components with less reliable or slower parts. (We've been burned already by our previous manufacturer doing this.) Any recommendations, especially regarding consistency? I can read Ars Technica to get an overview of current models, but what are consistently good models?

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• Can a consumer wireless router act as both a wireless client and access point?

  - by glibdud

  I'm going to be moving in the future, and integrating my home network into that of my landlord. I wish to maintain an isolated network while using his internet connection, so I'm planning on cascading my router off of his (WAN-to-LAN type configuration). Unfortunately, it looks like it might not be feasible to run a wire between the two. Therefore, I'd like to send my WAN connection over WiFi to his router. At my disposal, I have a WRT54GL (running Shibby's Tomato mod), and I just bought an Asus RT-N66U (I can be flexible with the firmware). My first thought was to set up the WRT as a wireless bridge, then run a wire between that and the N66U's WAN port. I'm reasonably sure I could make that work, but can I eliminate the WRT from the equation altogether? Can the N66U connect to the landlord's WiFi as a client, effectively using that as the WAN port, while simultaneously providing wireless access to my devices on an altogether different WLAN?

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• Logitech bluetooth audio receiver quality

  - by lietus

  I bought a Logitech Bluetooth Audio receiver, and have run into a problem: When playing audio, it contains short hisses/clicks on higher tones or vocal+heavy instrumental music (Sound quality appears to be unclean). I'm not sure what could be the reason, but this only happens when I play from certain devices. My laptops (a Dell XPS Win7, and an Asus Eee seashell Win7) and my phone (Samsung Player 5) both have the problem. However, when I tried using a Samsung S2 phone, the audio was crystal clear. Seems that this could be something with Bluetooth transiting device.. Has anyone encountered a similar problem?

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• USB forwarding from dom0 to domU

  - by Karolis T.

  What are my options to forward two USB connected phones to xen guest? I've read about PCI-passthrough http://www.wlug.org.nz/XenPciPassthrough, but I'm sure usb controller in the server isn't a pci card. There's device level forwarding, but I need to forward two devices, this here doesn't say how to do it: http://www.olivetalks.com/2008/02/03/usb-forwarding-on-xen-it-just-does-not-work/ Would something as simple as: usbdevice = [ 'host:xxx', 'host:yyy', ] work? EDIT: I'm now starting a bounty. This is really important for me and for other people also, hoping someone who have this resolved will be able to help.

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• Ways to do simple failover with one server and two IPs

  - by CrassHoppr

  The setup is one server (Windows 2008) at one location with two incoming connections. As the server has to interface with various on-site devices, and will have a small number of incoming connections, a data center is not an option, and instead cable/dsl connections must be used. The goal is that users visit https://service.site.com and are sent to either the primary IP address or a secondary IP if the primary is down. I've seen advice to use round robin DNS for this, but caching an IP for a downed interface is something I'd like to avoid. Is something like this possible with these constraints?

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• Servers at remote sites vs. centralized servers?

  - by Boden

  Looking for some opinions here. We've got three physical locations and site-to-site VPN between all three. Currently we've got Windows domain controllers at each location, with roughly 50 clients at each. The domains are currently separate, and we're looking at integrating the three sites. Email (Exchange) will be located at the primary site, and RPD is already being used at the secondary branches to hit the app servers also located at the primary site. The bulk of the local user load at the other two sites is just file sharing. What would the main benefits and drawbacks be of replacing the local domain controllers with NAS devices, and only keeping the domain controller(s) at the primary site? (assuming upgrades are coming regardless) Under what circumstances would you choose one setup over the other?

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• Logical and Physical network topologies

  - by t.thielemans

  I'm trying to understand the difference between logical and physical topologies but it's a bit confusing to me. Cisco states these as logical topologies, but from my understanding these should be physical topologies? This is what I understand so far: Physical PtP: desktop directly connected to a desktop Multiaccess: several desktops connected to a medium with access to each other (Cisco Ring image, how should I view this in a live situation?) Ring: several desktops directly connected to each other creating a loop? Logical PtP: two desktops (virtually) connected to each other with intermediairy devices in between MultiAccess: (don't have a clue) Ring: (don't have a clue) Could anyone help me out and perhaps explain the difference a bit more detailed? Online I can't find any useful topics. I am using the Cisco Network Fundamentals book.

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• 8 Character Device names

  - by Lee Harrison

  Is there any reason to still use only 8 characters in a device name? My boss still uses this rule for printers, computers, routers, servers... basicly any device connected to our network. This leads to massive confusion among users, especially when it comes to printer. It also leads to confusion from an administration standpoint because every device is named vaguely, and similarly(its only 8 characters!). I understand the history behind this and compatibility with older systems, but none of our legacy systems will ever make use of PS-printers and Wifi networks. Is there any reason to still do this, and what is everyone else doing when it comes to naming network devices at an enterprise level?

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• Disable RAID Controller

  - by B.Mr.W.

  I have some decent HP Proliants server that come with "HP Smart Array P410i Controller" enabled, I am using these boxes to set up a Hadoop cluster and I know, RAID is for sure a no-no for Hadoop since the application itself will take care of data redundancy and extra intelligence provided by RAID won't be helpful and might turn down the performance. I tried to disable the devices at the BIOS and the box cannot even access the disk afterwards. So I am assuming the controller is sitting between disks and mother board, and we have to turn it on and configure it to "level0" or something like that. I am wondering what should I do to "disable" the RAID functionality so it will fit into the Hadoop environment.

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• Not able to connect to internet in RHEL 5

  - by chankey007

  I just installed red hat enterprise 5 in my laptop and on desktop both. In desktop it is working fine but in laptop it is not showing the eth device. (I tried ifconfig only lo is there). I tried ifup eth0 still nothing happened. The network service in /etc/sysconfig/network-scripts/ifcfg-eth0 and in /etc/sysconfig/network are enable. I had ubuntu in my laptop before and I faced same problem with that too. Is there any problem with my laptop? I have my system on dual boot and in win7 networking is running fine. I am not able to connect to the internet only, other devices are working fine. System conf: Sony vaio E series. 3 GB RAM, intel core i3 2.13 GHZ.

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• Not able to connect to internet in RHEL 5

  - by chankey007

  I just installed red hat enterprise 5 in my laptop and on desktop both. In desktop it is working fine but in laptop it is not showing the eth device. (I tried ifconfig only lo is there). I tried ifup eth0 still nothing happened. The network service in /etc/sysconfig/network-scripts/ifcfg-eth0 and in /etc/sysconfig/network are enable. I had ubuntu in my laptop before and I faced same problem with that too. Is there any problem with my laptop? I have my system on dual boot and in win7 networking is running fine. I am not able to connect to the internet only, other devices are working fine. System conf: Sony vaio E series. 3 GB RAM, intel core i3 2.13 GHZ.

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• Can I buy a wireless access point that also acts as a DNS nameserver?

  - by Brabster

  Hi, I was wondering if I buy a wireless access point/router that also acts as a DNS nameserver for DHCP clients. I can see the hostnames of my home devices in the DHCP clients table of the router I have, it doesn't seem like a great leap of the imagination to have a local nameserver on there, something like hostname.home that automatically publishes those entries to a local zone. But - I can't find one that does that. Is there a reason why this shouldn't/can't be done? Or is my Google-Fu just weak? Cheers,

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• Transferring analog media (VHS casettes, vinyl records) to PC

  - by Javier Badia

  I have some VHSs and vinyl records which I'd like to convert to DVDs and CDs, respectively. I have a couple of questions about how to hook the devices up to the computer. I've seen some RCA-to-USB cables on the Internet like this one. Will those work for connecting the VCR to the computer? And what program would I use to take that and save it as a video file? Can I connect the phonograph directly to the Line In port in my PC or do I need some amplifier or something in the middle? I'm using Windows 7 x64, if it matters.

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• Seeking a solution to automatically copy files from the cd-rom disk to the USB drive once it's connected.

  - by Ray Nathan

  I plan to distribute a free CD that automatically copies files to a connected usb device. This process will be done on the computers of the users that obtain the cd. The CD will contain an autorun.ini file that will instruct the computer to copy a set of files located on the cd..to a specific directory on the connected usb device. The usb drive letter is not the same on all the systems, therefore...Windows XP should automatically know the drive letter of the usb device before the copy operation begins. What would be the best way of creating a short batch file or script that I can place on the CD to execute this process? Also, please note that it is NOT feasible or recommended to include a batch file on the USB devices to sync this operation due to the explanation at the beginning of this paragraph. :) Thank You All

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• Xen 4.1 host (dom0) with blktap disks ("tap:aio:") not connecting

  - by Manwe

  Problem using blktap with xen-4.1 running Ubuntu Precise stock kernel with dom0 xen-4.1. I get: [ 5.580106] XENBUS: Waiting for devices to initialise: 295s...290s. ... [ 300.580288] XENBUS: Timeout connecting to device: device/vbd/51713 (local state 3, remote state 1) And some syslog lines: May 17 13:07:30 localhost logger: /etc/xen/scripts/blktap: add XENBUS_PATH=backend/tap/10/51713 May 17 13:07:31 localhost logger: /etc/xen/scripts/blktap: Writing backend/tap/10/51713/hotplug-status connected to xenstore. with tap:aio: disk lines. file:/ works. disk = [ 'tap:aio:/data/root.img,xvda1,w', ] Problem exists with lucid and precises domU kernels and both guests work in Ubuntu hardy dom0 Host 64bit 2.6.24-28-xen xen-3.3 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise

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• How to detect device type from device connected to router?

  - by molly

  I have a att router and there is an unknown device connected to my network. I can't seem to kick it off because of how att's router settings are created which is kind of dumb. I am able to see its local ip and mac address. I am on a mac with snow leopard. How can I get more information on the device with the information that I have? I want to see what kind of device it is, I have checked all devices that are connected to the router and none seem to match the local ip that is connected. I have WPA encryption setup with a strong password.

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• What are the essential considerations for setting up systems in a location with unreliable power?

  - by dunxd

  I deal with a lot of remote offices located in parts of the world where the local grid power supply is unreliable. Power can go off anytime with no warning, with outages ranging from minutes to days Power fluctuation is wild, with spikes and brown outs Currently the offices will have some or all of the following: A generator, with an inverter, or some sort of manual switch A big UPS or battery array connecting a number of devices Several smaller APC UPS with computers attached Low cost Voltage Regulators sometimes connected between mains and UPS or device. I know that each of these things needs to be appropriately rated for the equipment to which it is connected (although I am not sure how to calculate the correct rating). The offices will generally have the following equipment (in varying quantities): some sort of internet connection device (VSAT router, ADSL modem, WiMax router) Cisco ASA 5505 firewall a bunch of PCs printers one server I don't seek to replace the advice of an electrician, but in some of these locations they only answer the questions you ask them, so I need to make sure I have enough understanding of the essentials to protect equipment from damage, and possibly get through some power cuts.

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• Is there some standard way to publish a calendar feed?

  - by CMP

  For a web application I am working on, I would like to be able to give the user a single url that they can enter into the calendar application of their choosing to have events from our application show up in their calendar. Most other sites I have seen that do similar things will have a one time download of an .ics file that can be imported. If I have to require my users to download a new file every time the schedule changes, it sort of defeats the purpose of having the feed at all. The calendar can change many many times a day. What I would really like is something like rss where their calendar program can look up a url and automatically see the most recent data. Does anything like this exist? Our main target is mobile devices, so it really should be supported by iCal and google Calendar. Anything else is bonus.

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• Realtek "Microphone Effects" no longer working

  - by abc

  I have a mic plugged into my computer, and I was able to use the "microphone effects" tab here to enable/disable noise suppression and acoustic echo cancellation. Noise suppression off and acoustic echo cancellation on were the most recent settings I had on before the problem occurred. I disabled my mic in the windows 7 "recording devices" tab, then re-enabled it. When it came back, these options were grayed out, and remained so even after a reboot. I am not sure why this is or how to fix it, all other options are still the same (Settings are identical to when it was working). Any ideas whats wrong or how to fix it? edit: can't post image due to being new.

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• How to Set "<options>" in fstab - Manual Mounting is Successfull

  - by nicorellius

  I am not real familiar with fstab yet, so I have a couple questions. When I use this command to mount devices: sudo mount -t cifs -o username=admin //192.168.1.134/share_name /mnt/share_name With passwords: sudo="local user password" password="password for device" How do I translate that into an fstab entry? So far, I have tried this in the fstab and mounting fails: //192.168.1.134/share_name /mnt/share_name cifs default 0 0 This is where the question comes in. Where I have default, should there be something instead, indicating username=admin, etc?

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• Laptop connects to other network but not to my home wireless

  - by Nilesh

  My home network's wireless SSID is say "XYZ" I also have an ethernet wire from the same router. I have two laptops A and B Earlier both A and B were able to connect to my home internet through the ethernet and wireless. Suddenly, the laptop B can no longer connect to XYZ or through ethernet. When I do plug the wire, i get the connection icon all green but when I try to access any web page it errors out (page not found) But strangely laptop B connects to my neighbours wireless SSID "ABC". I have also tested laptop B with other networks and it connects fine. Laptop A and many other devices still connect fine with my home wireless "XYZ" Strange thing is when my laptop B connects wireless through XYz, it gets the IP address but then none of the browsers (chrome,firefox, IE) can show any web pages. What settings should I be checking on laptop B that is preventing it to connect to my home internet. Thank you

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• Is it possible to sync specific router settings across multiple routers?

  - by Betard Fooser

  I recently purchased a second Linksys wireless routers set up on the other side of my home and I am wondering if it is possible to somehow sync particular settings between the two? For instance what I am really after is the "MAC Filter List". I would "like" to be able to maintain the list on both routers without having to manually type in the field values. maybe this isn't possible, or has an easy answer, but hopefully those of you who know will cut me a bit of slack. I tried to "google" the answer to this of course, but it seems any searches with the words "sync" and "router" and/or "wifi" result in pages of people having issues with synching their iOS devices over wifi. I would say that have decent amount of networking knowledge in regards to average home networks, and I imagine in larger businesses / corporations they must have a "simpler" way of maintaining things like this. Any insight to point me in the right direction will be much appreciated.

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• What is needed for 'Previous Versions' to be visible on the client OS?

  - by Zoredache

  I have servers with Shadow Copies enabled taking snapshots a couple times a day. From the server, if you look at the local devices you can see the Previous Versions being populated reliably. But from remote clients, the ability for an end-user to see the Previous Versions seems to be very hit-or-miss. For the sake of this question you can assume that all my clients are Windows 7 and the Servers are Windows Server 2008 R2. Is there an exhaustive list of everything that is required for end user to see Previous Versions? Are their any requirements for a certain level of share or filesystem permissions, other then read access? Does something need to be open on the firewall, other then what is already in-place for normal Windows networking?

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• Odd Apple AirPort Express behaviour

  - by MatthewD

  I've been using a rather old AirPort Express for home Wi-Fi for a number of years. (It's old enough that it only supports WPA, not WPA2 -- perhaps this is an indication that I should upgrade!) In the last week I've been experiencing very slow internet over the Wi-Fi. Suspecting that someone outside my home was leeching from me (despite a reasonable password and MAC address filtering turned on) I decided to change some settings: I changed the SSID, turned off broadcast of the SSID and changed the password. After these changes, I managed to connect using the new password on my iPad. But on the other devices I tried (iPhone, PS3) I was not able to connect. In fact, I only succeeded in connecting when I entered my OLD password! Is this a known issue with ancient AirPort Express units? Is my unit cracked and unrecoverable?

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• Cross-platform automatic adhoc wifi?

  - by marienbad

  I'm not very knowledgeable about wifi, but I understand the notion of Adhoc networks (Wifi without a router), so... Is there a standard (or widely implemented) way of letting a device "momentarily" negotiate a wifi connection (Adhoc network or otherwise) directly to another device, transfer some data, and then quit, all without any user intervention on either device? For example, let's say I have a PC and an ereader in the same room and there's no nearby wifi router for either of these devices to connect to. I want to send a file from PC to ereader but I don't want to do the work of setting up network, selecting an SSID, or entering passwords. Is that possible?

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