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• UNRAID V4.7: Lost write permission on Win7/Android devices

  - by JROC

  I'm currently running V4.7 and I haven't touched any of the user or share settings, and I'm periodically losing read.write permission on both my windows 7 pc and my android tablet connecting over the wireless. Sometime I can access my shares and see the folder directories, but when attempting to open a folder windows denies me access saying I don't have the proper permission. This is after I have logged in with my main account that has full read/write access of everything, same on my android device. This all started when I attempted to delete a large amount of files (8gb) to make more room and about half way through started getting permission errors. What could be causing this? Thanks

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• AIX network parameters to close TCP sockets of unplugged devices

  - by ADD Geek

  Hi there We have an AIX box, running what we call in banking "ATM Switch" not the ATM networking switch, but the bank ATM driver. where we have some ATM machines connected to two server processes. The problem is, when we disconnect any of these machines, the netstat -na| grep <port number> command shows that the socket established for this disconnected device is still established, we have to manually send a command from the software to make the socket aware that it is not live anymore. Is there a parameter on tcp level to make this connection aware within a minute or two that this device is not connected anymore? we had the following parameters set with root privileges: no -o tcp_keepidle=1000 no -o tcp_keepcnt=2 no -o tcp_keepintvl=150 no -o tcp_finwait2=100 it was originally having the default values. but even after we changed these parameters and restarted the server processes, the problem was still there.

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• Bridging Network Devices with Multiple IPs

  - by Andy

  I have a small server with a single NIC that I am trying to get a bridge functioning on so that I can run KVM. On this NIC I have a couple IPs statically assigned to it: eth0 = 192.168.1.1 eth0:1 = 192.168.1.2 eth0:2 = 192.168.1.3 eth0:3 -> Assign the bridge to this I am attempting to set up a bridge using the following instructions: sudo brctl addbr br0 sudo brctl addif br0 eth0:3 sudo ifconfig br0 192.168.1.120 netmask 255.255.255.0 up sudo route add -net 192.168.1.0 netmask 255.255.255.0 br0 sudo route add default gw 192.168.1.1 br0 sudo tunctl -b -u root -t tap0 > /dev/null sudo ifconfig tap0 up sudo brctl addif br0 tap0 However, when I do the second command: sudo brctl addif br0 eth0:3 It puts the ENTIRE eth0 device into promiscuous mode. This knocks the server offline and inaccessible by anything other than locally. Is there a way to bridge JUST eth0:3 to br0 and not put the entire device into promiscuous mode?

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• Storage (EBS) attached to my EC2 instance reporting files on two devices at once

  - by Philip Isaacs

  I have on EC2 instance with two attached EBS drives. One drive /dev/sda1 is mounted on / The second /dev/sda2 is mounted on /var2 So here's what's strange. Whenever I add any files to /var2 the it is also reporting that the / device is also filling up. As if they are the same device. It's so strange. So if I were to save a 10 mb file to a directory on /var2. Both / and /var2 use 10 mb of space up. Is this bizarre?

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• Are FC and SAS DAS devices standard enough?

  - by user222182

  Before I ask my questions, here is some background info that may or may not be useful: For the first time I find myself needing a DAS solution. My priority is data through-put in a single direction. I can write large blocks, and I don't need to read at the same time. The server (the data producing device) is not really a typical server, its a very powerful single board computer. As such I have limited options when it comes to the add-in cards I can install since it must use the fairly uncommon interface, XMC. Currently I believe I am limited PCIex8 gen 1 which means that the likely bottle neck for me will be this 16gbps connection. XMC Boards I have found so far offer the following connections: a) Dual 10GBE ethernet controller, total throughput 20gbps b) Dual Quad SAS 2.0 Connectors (SFF-8XXX) HBA (no raid), total throughput 48 gbps c) Dual FC 8gb HBA (no raid), total throughput 16gbps My questions for you guys are: 1) Are SAS and/or FC, and by extension their HBAs, standard enough that I could purchase a Dell or Aberdeen storage server with a raid controller that has external SAS or FC ports and expect that I can connect it to my SAS or FC HBA, be presented with a single volume (if I so configured the storage server), all without having to check for HBA compatibility? 2) On a device like a Dell PowerVault (either DAS or NAS) is there an OS on it to concern myself with, or is it meant to be remotely managed? Is there a local interface in case I cant remotely manage it (i.e. if my single board computer uses an OS not supported by Dell OpenManage). Would this be true of nearly any device which calls itself a DAS? 3) If I purchase some sort of Supermicro storage chassis, installed a raid controller with external connections, is there a nice lightweight OS I can run just for management of the controller? Would I even need an OS since the raid card would be configured pre-boot anyway? 4) It is much easier to buy XMC based 10gigabit ethernet cards (generally dual port). In what ways would I be getting into trouble by using iSCSI as a DAS are direct cabling with SFP+ cables? Thanks in advance

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• IP address reuse on macvlan devices

  - by Alex Bubnoff

  I'm trying to create easy to use and possibly simple testing environment for some product and got some strange behaviour of macvlan's. What I'm trying to achieve: make a toolset for one-line start/stop of lxc containers(via docker) bound to external ip(I have enough of it on host machine). So, I'm doing something like this: docker run -d -name=container_name container_image pipework eth1 container_name ip/prefix_len@gateway and pipework here does this: GUEST_IFNAME=ph$NSPID$eth1 ip link add link eth1 dev $GUEST_IFNAME type macvlan mode bridge ip link set eth1 up ip link set $GUEST_IFNAME netns $NSPID ip netns exec $NSPID ip link set $GUEST_IFNAME name eth1 ip netns exec $NSPID ip addr add $IPADDR dev eth1 ip netns exec $NSPID ip route delete default ip netns exec $NSPID ip link set eth1 up ip netns exec $NSPID ip route replace default via $GATEWAY ip netns exec $NSPID arping -c 1 -A -I eth1 $IPADDR And it works for first time per IP. But for second time and later packets for containers IP isn't getting into container, while all configuration seem fine. So it looks like this: External machine ? ping 212.76.131.212 ....silence.... Host machine root@ubuntu:~# ip link show eth1 2: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:15:17:c9:e1:c9 brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip addr show eth1 2: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:15:17:c9:e1:c9 brd ff:ff:ff:ff:ff:ff root@ubuntu:~# tcpdump -v -i eth1 icmp tcpdump: WARNING: eth1: no IPv4 address assigned tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 00:00:46.542042 IP (tos 0x0, ttl 60, id 9623, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2345, length 64 00:00:47.549969 IP (tos 0x0, ttl 60, id 9624, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2346, length 64 00:00:48.558143 IP (tos 0x0, ttl 60, id 9625, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2347, length 64 00:00:49.566319 IP (tos 0x0, ttl 60, id 9626, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2348, length 64 00:00:50.573999 IP (tos 0x0, ttl 60, id 9627, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2349, length 64 ^C 5 packets captured 5 packets received by filter 0 packets dropped by kernel 1 packet dropped by interface Host machine, netns of container root@ubuntu:~# ip netns exec 32053 ip link show eth1 48: eth1@if2: mtu 1500 qdisc noqueue state UNKNOWN link/ether b2:12:f7:cc:a1:9d brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip netns exec 32053 ip addr show eth1 48: eth1@if2: mtu 1500 qdisc noqueue state UNKNOWN link/ether b2:12:f7:cc:a1:9d brd ff:ff:ff:ff:ff:ff inet 212.76.131.212/29 scope global eth1 inet6 fe80::b012:f7ff:fecc:a19d/64 scope link valid_lft forever preferred_lft forever root@ubuntu:~# ip netns exec 32053 tcpdump -v -i eth1 icmp tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes ....silence.... ^C 0 packets captured 0 packets received by filter 0 packets dropped by kernel So, can anyone say, what can it be? Can this be caused by not a bug in macvlan implementation? Is there any tools I can use to debug that configuration?

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• Print server does not show up on router's attached devices

  - by AshTee

  Recently I bought a new more powerful wireless N router, DLink DIR 628. So I removed all connections from the previous router (Netgear WGT624) and connected them as they should be to the DLInk router. Everything works fine except for the print server. I have Hawking print server connected to HP Laserjet 6P parallel port printer. It works well with the Netgear router. But when I connect it to the DLInk router, it does not even show up in the LAN computers list. I am not sure what is going on. There is a utility called PSAdmin that can talk to the Hawking print server if I switch to Netgear router. With that utility, I can get the assigned IP address to the print server. But when switching to DLink router, even the PSAdmin fails to find the print server. I have been trying various things for last couple of days in vein. Please help.

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• How to scan local network (LAN) for connected devices (MacOS)

  - by smotchkkiss

  I'm basically looking for something like this but available on Mac. I am trying to connect a new workstation to our wireless multifunction printer and I'm having a hell of a time getting the device to spit out an IP for me to connect to. Is there a way I can scan the network somehow? If it makes a difference, the new workstation is using MacOS X 10.6 Thanks in advance :)

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• Input devices stopped working during system upgrade

  - by amorfis

  Hi, I was upgrading Ubuntu on my server (but Ubuntu is in desktop version) when mouse and keyboard stopped working :( So the screen went black (screensaver), and now I can't do anything. I don't know what stage of upgrade it stopped working, probably now it waits for me to answer some question. Keyboard and mouse were connected by KVM, connecting them directly doesn't help. Both are on USB. What I can do, is connecting to the machine by ssh. Can I somehow see and answer questions of update system and somehow finalize process of upgrade?

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• Removing/hiding the option to "safely remove USB devices" via GPO and registry

  - by dyasny

  I ave already gone through http://serverfault.com/questions/12833/how-to-prevent-windows-from-safely-removing-hardware and it has a registry based solution for WinXP, however what I am after is: 1. a GPO based solution 2. windows 7, 2003 and 2008 as well thanks

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• serving mp3s to mobile devices is flooding nginx with partial requests

  - by drumfire

  I am serving mp3s with a minimalistic nginx server. What I see in my log files is that there are a lot of requests, in particular from AppleCoreMedia and sometimes Android useragents, that flood the server with short requests. Sometimes they keep requesting to download the same partial content for a very long time; sometimes more than an hour. For example: "GET /somefile.mp3 HTTP/1.1" 206 33041 "AppleCoreMedia/1.0.0.9B206 (iPhone; U; CPU OS 5_1_1 like Mac OS X; en_us)" "GET /somefile.mp3 HTTP/1.1" 206 33041 "AppleCoreMedia/1.0.0.9B206 (iPhone; U; CPU OS 5_1_1 like Mac OS X; en_us)" "GET /somefile.mp3 HTTP/1.1" 206 33041 "AppleCoreMedia/1.0.0.9B206 (iPhone; U; CPU OS 5_1_1 like Mac OS X; en_us)" [...] I also get a lot, but not as much, of these: "-" 400 0 "-" "-" 400 0 "-" The IP addresses are always from clients that start downloading shortly after that request, usually they have roughly the same UserAgent as in the first example. emphasized text I have enabled server throttling and connection limits in nginx to limit the huge amount of log entries from equivalent IPs at least somewhat. There was a performance issue when I saw the same behaviour on the previous server that used Apache. I installed nginx on a better server then moved the site. When Apache could not handle more connections from the increasing number of clients effectively that server was ddossed. There was no bandwidth issue with already connected clients and I don't know if the already connected clients were using more than one connection at a time. Please tell me: Are clients that appear to get stuck on a download a Bad Thing™ I heard people say their mobile bandwidth use was much higher than they could account for. I'm thinking this type of client behaviour can account for that. And costs us more bandwidth too. Which up to date alternatives exist out there that can handle serving this type of data better than plain HTTP? Useful general insights for someone who just came into this field straight out of the late 90s. :-)

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• Cannot get sound in Windows 7 - No audio devices are installed

  - by bobsr

  Just installed Windows 7. After install everything was working fine until i noticed that i had no sound. It is a AMD Athlon x64 Dual Sound works in XP, has these sound drivers Yamaha DS1 WDM HD Audio Render I tried finding the above drivers, but no luck.

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• Wireless USB devices compatible with Windows 7 64-bit

  - by BrynJ

  I want to upgrade my Vista 64-bit edition to Windows 7 64-bit, so I've installed and run the Windows 7 Compatibility Test. The only item that is being highlighted as incompatible is my Zyxel G-202 wireless usb network device. Does anyone know of a wireless USB device that is compatible with Windows 7 64-bit?

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• Uploading with browser makes all other browser tabs and devices disconnect

  - by fabsenet

  Whenever I upload a video to YouTube all other browser tabs behave like there is no connection at all. It even affects my phone and other computers on the network therefor I think it has to do with my router. When the upload is done everything works normally again. I never observed this behavior with any other upload. My router is a Fritz!Box 7390 and my uploading PC is connected through a 1000mb/s switch (wired) to the router. Uploading through another browser does not change anything. I understand that other sites become slow as the network resources are limited, but stopping altogether feels wrong. speed.io measures for my internet connection: 40.894 Kbit/s down, 2.685 Kbit/s up, 29 ms ping, 2.048 con/m connects

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• Wireless dropouts that only affect subset of devices

  - by jwaddell

  When watching videos streamed over WiFi from a NAS box (D-Link DNS-323) I am getting wireless dropouts. However they only appear to occur when I have left my laptop (Dell Inspiron 9300 running Windows XP SP3) running; the laptop is usually suspended if I'm not using it. The dropouts have occurred when streaming to a Netgear EVA8000 streaming device, and also to a PS3. I'm using a Netgear DG834G as the wireless modem/router. When a dropout occurs I go to the laptop and see that its wireless connection has also dropped out. The odd thing is that my wife's MacBook and my iPhone still maintain their connections. What could be causing this behaviour, and how do I go about fixing it?

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• Can MySQL use multiple data directories on different physical storage devices

  - by sirlark

  I am running MySQL with its data dir on a 128Gb SSD. I am dealing with large datasets (~20Gb) that are loaded and processed weekly, each stored in a separate DB for the purposes of time point comparisons. Putting all the data into a single database in unfeasible because the performance on such large databases is already a problem. However, I cannot keep more than 6 datasets on the SSD at a time. Right now I am manually dumping the oldest to much larger 2Tb spinning disk every week, and dropping the database to make space for the new one. But if I need one of the 'archived' databases (a semi regular occurrence) I have to drop a current one (after dumping), reload it, do what I need to, then reverse the results. Is there a way to configure MySQL to use multiple data directories, say one on the SSD and one on the 2Tb spinning disk, and 'merge' them transparently? If I could do this, then archiving would no longer mean "moved out of the database entirely", but instead would mean "moved onto the slow physical device". The time taken to do my queries on a spinning disk would be less than that taken to completely dump, drop, load, drop, reload two entire databases, so this is a win. I thought of using something like unionfs but I can't think of a way to control which database gets stored on which physical drive, because it works by merging on a directory level (from what I understand) so I'm still stuck with using multiple directories. Any help appreciated, thanks in advance

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• Can't ping IPs for devices not part of Windows Domain

  - by GiddyUpHorsey

  I have a home network with a Trendnet wireless router and a Windows Domain. The DNS server is on a Windows 2000 Server and is configured to forward queries to DNS servers provided by the ISP. The router provides DHCP and is configured with the Windows 2000 Server as the DNS server. When I connect iPhones to the network over WiFi, the router can ping the iPhones through its browser based admin interface, but Windows machines that are part of the Windows Domain cannot. A laptop was connected to the network over WiFi that wasn't joined to the domain and it could see the iPhones. All machines either have a fixed or DHCP allocated IP on the 192.168.0.* subnet. How do I configure the DNS server or the Windows Domain so that Windows machines can see the iPhones?

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• How To Monitor Home Wireless Network Connected Devices Bandwith

  - by GWLlosa

  (Originally posted on SuperUser, not sure if it might be better suited here) I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from the modem to a late-series Linksys router, which provides wired and wireless networking. The vast majority of the users are wireless connections. For day-to-day tasks, this connection is fully sufficient for all my needs. However, on regular occassions, we have social gatherings that involve many people bringing laptops and other PCs and using the network and internet simultaneously, frequently for gaming. I have no administrative oversight over these machines; they have been known to be riddled with spyware and/or bloatware or be running torrents, legal or otherwise. The only reason I care is that on a regular basis, one of the machines will flatline my internet bandwith, and consume it all in order to upload/download/spam people/whatever. When this happens, the latency of the connections for gaming and the like becomes unacceptable, and everyone suffers. My question is: Is there a system I can set up whereby I can easily monitor the various systems connected to my wireless connection, see how much bandwith each one is using, and for what ends? That way, at a glance, I can spot the offending machine and kick it from the connection, without having to go from machine to machine, checking each one's "bandwith used" properties manually, and dealing with the owner's indignant protests all the while. I understand this will likely involve 3rd-party software and/or hardware; my issue is I don't even know where to begin.

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• Need advice on how to set up live video streaming to web/mobile devices

  - by jasondewitt

  I have a bunch of live udp video streams that currently are viewed by set top boxes in my network. I would like to pick this video up (I can do this with vlc now) and stream it out to other non-STB endpoints (webpage or a phone/tablet of some sort). Right now I am able to pick up the udp stream with vlc and convert it to an http stream on port 8080 of my vlc box. Then I can use the vlc client to pick up and watch that video stream. This is where I'm not sure where to go with it. I really doubt I would want everyone who is watching the video to make a connection back to my vlc server that is doing the encoding, so how do I distribute this live video to the people who want to see it?

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• No internet on some devices, still on WiFi

  - by Joost

  Ok, here's the situation. I live with 3 friends, and we often sit in the living room with laptops out. There's a WiFi router in the kitchen, and we have quite a stable connection. The issue, however, is this: sometimes, all of a sudden one of my friends loses internet connection. Even disconnecting/reconnecting to the WiFi network does not help. When we restart the router, though, it works like a charm again. The odd thing is, it happens just for this one Windows 7 laptop. We've switched routers (for a different reason) in the mean time, but the issue remained. This makes me suspect the laptop even more. I realise I've given little details, but I don't really know what to try/do. Any suggestions what it might be?

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• Booting CDs/USB devices after installing Windows 8

  - by shoyip

  I recently installed Windows 8 on one of my four primary partitions. I had two partitions for Windows 7 (boot and os), one for the Windows System Recovery Environment and the last for Ubuntu. I was often using Ubuntu, but after the installation of Windows 8 Pro I couldn't boot in it because it needed the reinstallation of GRUB2. So I thought to do it by Terminal in a live cd; but when I tried to boot the Live CD, it booted me Windows 8 Pro. This is a problem of UEFI, Secure Boot or my BIOS? It didn't happen never before now. And if it's a problem of Secure Boot, how to disable it? Thanks in advance, Sho.

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• How to analyze a wifi network with many devices

  - by Caveatrob

  My friend has a wifi network with an x-box, a wii, a playstation, and two nintendo portables. She's also got 2-3 PC's and a network printer. She's got a wifi repeater as well. She claims that she didn't have any issues for months with everything working together, and suddenly everything stopped disconnecting. I haven't been over there yet - wanted to figure out the best way to diagnose the thing. I asked her to send me the stats on the booster and the modem, etc: The booster is Netgear serial #2ac2195506b95 The modem is Cisco Linksys e1500 #10910c12129103 We have a sprint router thru centurylink and they said it is working fine 660 series

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• Virtualbox - USB Devices don't install correctly using Windows 7

  - by MetaDark

  I am trying to install the drivers for my HTC Magic (2.1) and my iPod Touch "3G" 8GB (4.1), but when I plug them in, neither of them successfully install their drivers. They work perfectly fine when running on Windows natively, why are they behaving like this on Virtual Box? I am using Windows 7 (AMD64) - Natively & Non Natively. Ubuntu 10.10 - Also Natively Virtual Box 4.0.0 Hopefully someone has encountered this before and has an answer XD

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• Problems with USB-Devices using VDR

  - by emmsinator

  Hey Guys, I'm using VDR on vSphere4. It works sucessfully. I've already backuped several VMs with VDR and I like it very much. But now we got a problem. We have 2 VMs, using an USB-Device Server with a stick plugged in, which is definetely need by these 2 VMs for Licensing and so. Every time, I start the Backup process, the VMs lost the communication to the USB-Server and its stick after building the snapshot and while online. Because of that, the software on these VMs can't work correctly. I have to restart both Machines to solve this problem. These fact is bad for an automatic backup. Does VDR have a special function for those cases or is something like this already known? It would be no problem, to shutdown the servers for building snapshots on Saturday or Sunday. Can VDR initiate a shutdown before starting the backup process? Otherwise I must try to use scripts, but that wouldn't be so nice. Thanks a lot for your help.

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• Audio problems with asus notebook with Bluetooth and usb devices in win 7

  - by QuickSilver

  My notebook is Asus P53E - core i5 Windows 7 installed Audio from PC speakers and headphone is distorted when i turn on bluetooth or some usb device plugged in. I belive this is a software issue. I tried updating my audio drivers but nothing help. Any help will be appreciated. Update: After a few days digging I found that this problem is causing by the asus sound enhancement application SonicFocus. The distortion stops while turning off sonic focus. Can anyone help me with a solution other than turning off SonicFocus

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