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• RAID FS detection at boot time

  - by alex

  An excerpt from dmesg: md: Autodetecting RAID arrays. md: Scanned 2 and added 2 devices. md: autorun ... md: considering sdb1 ... md: adding sdb1 ... md: adding sda1 ... md: created md1 md: bind<sda1> md: bind<sdb1> md: running: <sdb1><sda1> raid1: raid set md1 active with 2 out of 2 mirrors md1: detected capacity change from 0 to 1500299198464 md: ... autorun DONE. md1: unknown partition table EXT3-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT2-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT4-fs (md1): mounted filesystem with ordered data mode Is it OK that kernel tries to mount an ext4 raid as ext3, ext2 first? Is there a way to tell it to skip those two steps? Just in case: /dev/md1 / ext4 noatime 0 1 TIA.

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• Good HDMI splitter/switch solution

  - by Mehper C. Palavuzlar

  I have a full HD TV which has only 2 HDMI ports on it. Since I have more than 2 devices I connect to TV (e.g. laptop, game console, DVD player), it becomes uncomfortable to plug in and plug out HDMI cables every time I need to use the relevant device. I need a cheap solution to increase the number of my HDMI ports at least to 3. What type of splitter/switch do you recommend? Does the quality of splitter matter, or do they all produce the same audio & video quality?

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• KVM machine does not start ssh, network is started, used to work

  - by lleto

  have been searching an pulling my hear out for the last 6 hours. I have a virtual machine that has been running fine for the last six months. I was happy ssh'ing into it and it was running a database and some small apps. Tonight ssh stopped working, so I decided to reboot the machine. I now have the following situation: virsh list --all states machine as running I can ping the machine and get a reply When I ssh to the machine I see "ssh: connect to host [myserver] port 22: Connection refused" nmap does not show port 22 as open I have tried to: - reboot the machine once more (no luck) - mount the filesystem and check /etc/ssh/sshd.conf (has not changed since working situation) - install virsh console, however this does not seem to work When I mount the fs directly using losetup the strange thing is that file dates seem to be frozen in /var/log/ around the time of the crash. If I look in /var/run/ I can see an sshd.pid, but the time is 6 hours ago (and numerous reboots). My virsh xml looks like this: <domain type='kvm' id='21'> <name>myserver</name> <uuid>09678c8d-a99b-1d18-a7af-88d027cc8f93</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/disk01/myserver'/> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:e3:13:86'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'> <listen type='address' address='127.0.0.1'/> </graphics> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-09678c8d-a99b-1d18-a7af-88d027cc8f93</label> <imagelabel>libvirt-09678c8d-a99b-1d18-a7af-88d027cc8f93</imagelabel> </seclabel> </domain> I'm sort of lost as to where I can look to get the machine up and running again. On the same instance of kvm I have another server running which is working fine. Both are Ubuntu 12.04. All help is welcome....

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• How can ShadowProtect SBS backup to alternating external drives?

  - by detly

  I am trying to configure ShadowProtect SBS (v. 4.1.5.10129) in Windows Server 2003 SBS to backup my server hard drives to two alternating external drives. What I want is to be able to swap one drive for another every Friday, and have ShadowProtect continue on the same schedule. Ideally, this would require absolutely no user interaction whatsoever, apart from physically unplugging one drive and reconnecting the other. The trouble is, Windows Server 2003 does not allow you to assign the same drive letter to two different devices. So if I plug in drive #1 and assign it drive letter "X:", the next week when I unplug it and plug in drive #2, it gets some other letter. But since ShadowProtect is set to backup to "X:\", it can't find it and the backup fails. The drives are Samsung STORY Station 3.0 2TB drives. How can I configure things so I can just swap the drives over every week and not worry about having to reconfigure drive letters every time?

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• prevent domain controller using wpad for windows update

  - by BeowulfNode42

  We have a 2012 domain controller in an environment where we are running a web proxy auto discovery (WPAD) setup for client devices, and that proxy server requires authentication. However windows update does not support proxy servers requiring authentication. So we want to prevent windows update on our servers from using the WPAD proxy settings. On a domain member server we can log in to the local administrator account (not domain admin) and un-tick the the "Auto detect proxy settings" in IE internet options and that fixes the issue on those servers. But a domain controller does not have a local admin account, as that account is the domain admin account. Doing this to the domain admin account on the DC does not prevent it from using WPAD. Our whole purpose of running a proxy server that requires authentication is so we can identify what the users on our session based remote desktop servers are doing on the internet. See this MS KB Article for some info about Windows update and proxy servers "How the Windows Update client determines which proxy server to use to connect to the Windows Update Web site" - http://support.microsoft.com/kb/900935

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• Log centralization, display, transport and aggregation at scale v2

  - by Eric DANNIELOU

  This is a duplicate question of Log transport and aggregation at scale and http://stackoverflow.com/questions/1737693/whats-the-best-practice-for-centralised-logging, but the answers might differ now : The softwares described in 2009 may have changed since (for example Octopussy evolved from version 0.9 to 1.0.5). Rsyslog has become the default on most linux distro. Requirements have changed (security, software configuration management, ...). I'd like to ask the following questions : How do you centralize, display and archive system logs? How would you like to do it now if you had to? Most linux distro use rsyslog nowadays, which can provide reliable log transport. But some older unices, network devices and maybe windows box still use old udp rfc-style transport. How did you manage to get reliable transport? Storing logs for a few months can represent a huge amount of disk space. How do you store them? rdbms? Compressed and encrypted text files?

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• How can I get VirtualBox Guest Additions installed in an Ubuntu 9.10 server?

  - by sutch

  I have a freshly installed Ubuntu 9.10 server installed within a VirtualBox VM instance. From the VirtualBox menu bar, I selected Devices: Install Guest Additions... Then performed the following commands: > sudo apt-get install -y build-essential linux-headers-$(uname -r) > sudo mount /dev/cdrom /mnt/ > sudo /mnt/VBoxLinuxAdditions-amd64.run After some successful looking results, the following error is displayed: Installing the Window System drivers ...fail! (Could not find the X.Org or XFree86 Window System.) After restarting, I was looking forward to some UI integration with my host desktop (resize window, not needing to press right-Ctrl to escape the client window, and having copy and paste functionality. Is it possible to install the Guest Additions without the X Window overhead (I plan to only use for shell commands)? If additional packages are required, which ones?

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• logparser Message with error codes

  - by nsr81

  Hi All, Is there anyway to get complete error message using LogParser? When I run the following query: logparser -i:EVT -o:NAT "SELECT TimeGenerated,EventID,Message from System WHERE EventTypeName='Error event'" I get the following output: 2009-09-02 19:35:44 7000 The USB Mass Storage Driver service failed to start due to the following error: %%1058 The full "Message" in EventViewer is: Description: The USB Mass Storage Driver service failed to start due to the following error: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it. How can I obtain complete message using logparser?

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• Remote Desktop or Streaming Software/Services that Supports Gaming

  - by Griffin

  I've simply been amazed by the quality and speed of Onlive, as this technology has the potential of making hardware requirements irrelevant to the average user. However, at the moment Onlive is only for remotely controlling video games, and not desktops or other devices in general. I'm in pursuit of software or services that can accomplish this as well as Onlive does. I need: viewer (client) program portability (able to run on a USB stick) DirectX, OpenGL / full-screen game compatibility on the server side.** Gaming-acceptable color/scaling quality and responsiveness. I have a very powerful desktop at home and I want to be able to access this raw power from any other computer that I stick my USB into (in the same way Onlive gives gamers use of their powerful servers) What software/services has most of the above? NOTE: please specify what features your suggestion doesn't have.

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• Strange messages on new Dell Workstation during bootup

  - by dan99t

  I recently installed Windows 7 Ultimate on a new Dell T-7500 Workstation, and am seeing some strange messages on the screen: Dell SAS 6 Host Bus Adapter BIOS MPTBIOS 6.22.03.00 ( 2008.08.06 ) Initializing….. Press Ctrl – C to run SAS Configuration Utility Searching for Devices at HBA 0….. Dell MPT Boot ROM Successfully installed Then it loads Windows 7. All of above happens on its own, I don't touch anything. So what is going on & what do I have to do get rid off those initializing commands ? I have never had this happen to any previously owned Dell systems. Also I haven't installed any drivers yet but Sound, Video & Internet does work. Do I need to install any additional drivers?

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• DSL connection dropping when starting game

  - by bootoo

  New connection set up last week - have called tech support, signal fine, sending out tech guy tomorrow - however i cant make sense of this using Vista, 2wire connection 6mb ATT conn, wireless, i can browse website, stream video from my PC wirelessly to my xbox, watch Hulu in high res, connection seems fine I load up World of Warcraft, i select Enter World and without fail my 2wire modem 'DSL' light goes red, my internet light goes out, im no longer connected, then after 10 or 15 seconds it works again, but game has kicked me Noticed the same thing on opening or closing Utorrent as well No other phones/devices plugged into the phone jacks in the apartment - why would joining a game cause my DSL to drop? i can only guess it throws a bunch of information to the server when i hit 'enter world' and that causes an issue that shuts my connection down or my router hates me - all help appreciated

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• Unable to sync the Zune software with my HTC HD7

  - by Varpi

  I have a brand new HTC HD7 with Windows Phone 7, with no Software installed. I am running on Windows 7 64 bit. Whenever I try to sync my Mobile Device with Zune- I get this message: Can't connect to your phone. Disconnect it, restart it, then try connecting again I've downloaded latest Zune software and all updates. I don't have any certificates on my personal certificates. My phone is listed under Portable devices in Device manager (It shows as phone with driver version 4.7.965.0). I've restarted both my computer and the mobile device few times. I tried unlocking the device during the Zune sync Any ideas as to how I can sync my phone ?

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• What effect does RAID stripe size have on read-ahead settings?

  - by stbrody

  I'm trying to figure out the correct read-ahead values to set on a RAID10 array, and I'm wondering if the RAID stripe size should factor into my considerations. I've heard conflicting information about this in the past. I once heard that you should always set your read-ahead value to a multiple of the RAID stripe size, and never below the stripe size, because that is the minimum amount of data the RAID controller will ever try to read at once. Someone else told me, however, that setting read-ahead below the stripe size is fine, and can, in fact, increase the amount of parallel reads you can do across devices in the array, increasing performance and decreasing load on the array. So which is it? Do read-ahead settings that aren't multiples of the stripe size make sense or not?

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• UAC-account-users can't see their mounted network-drives

  - by Daniel

  I wrote a few login batches in the Group Policy Management which mount specified devices to specified usergroups. The batches work as they should as long UAC is disabled. My problem is that the UAC-account-users can't see their mounted network-drives because the login scripts run in elevated context. I tried to fix the problem with PsExec (-l) so that the network-folders are mapped with limited user rigths. But it seems that this won't work. (PsExec is already installed on all computers so it can work local.) Has anyone an idea how to fix that problem? I spended a long time in trying to fix the problem but I did not find any solutions about THIS problem.

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• Change audio output depending on which one is on

  - by pkrish

  I have a PC that is hooked up to my HDTV (via a long hdmi cable) and to a monitor, which is in another room. I have speakers directly plugged to the PC audio out. The PC is next to the monitor and speakers. I am not sure but I think Windows can play sound on only 1 audio device at a time. And I can only set 1 device as the default output. I can get sound on the TV or speaker depending on which device I set to default. But I would have to do this every time I switch between using my TV or my monitor! Is there some way to configure such that sound plays through the TV if the TV is on, else it plays in the speakers? If this is not possible, then the next best alternative would be to get the sound to play on both the devices at the same time. Thanks!

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• How do i use a USB wifi device properly?

  - by acidzombie24

  I'll just say a few random things One usb wifi device i notice only worked when it plugged into my usb hub Another one worked but couldnt get full speed. It came with an extention cord and when i had it a few feet away i was able to (usually) get full speed I had a wifi card in a tower in the past and just about all laptops have it built in How do i use a USB wifi adapter properly? The first device didnt come with an extention cord and made no mention of bringing it away from the computer. When someone else tested the device he said he was getting full speed while it was plugged into his tower so i was pretty surpised. How do i use USB wifi devices properly?

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• How to automate changing my ip?

  - by callisto

  I am very new to OSX. I will use my MBP at work and home. I would like to be easily able to switch my ip when changing location. Thus far I have dabbled with the automator, hoping to do something like this: [pseudocode] If IP = 192.168.0.10 root# changeip 192.168.0.10 10.0.0.15 else root# changeip 10.0.0.15 192.168.0.10 The reason for this is that my IP from home will not allow me access at work and vice versa. I have friends and family who drop in now and then, multiple wireless devices set up for the home IP range. Changing all of that to accommodate one new device (the Macbook) would make me reconsider my foray into OSX. I'd rather have the MBP adapt to me than I to it.

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• Error in using DBAN on HDD

  - by John Watson

  I am using DBAN to erase HDD. DBAN is loaded from a CD and BIOS Boot order has been set to favour CD drive. On starting laptop, system boots from CD and DBAN interface can be seen. DBAN detects two storage devices, HDD and the SD Card. My HDD IS 320GB but DBAN says 298GB. It erases the SD card but when i try to erase HDD, it gives following error. DBAN finished with non-fatal errors. *ERROR /dev/sdb (process crash) *ERROR /dev/sda (process crash)

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• NAS + XBMC combination

  - by Hendrik

  I currently own a WD Sharespace and I am not too happy about it. It will freeze constantly and its rather slow. I've been thinking of replacing it. I also own a WD HD Live, and it works like it is supposed to, but recently I've seen XBMC in action and I was quite impressed. I've been wondering lately about the possibility of replacing both products with one new device: a fast reliable nas which I can install XBMC on and is capable of rendering video and has an HDMI out. Do any such devices exist for sale or is the only way to build one from scratch? I've seen HTPC's for sale but I've never seen any of them with a raid setup. I've also read about building your own NAS with freeNAS but those setups dont allow you to run XBMC. Does anyone have experience with this?

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• Enabling Surround sound on a Realtek ALC892 via SPDIF, on Windows 7

  - by Alex

  I have a problem with my ALC892, on an ASRock mainboard (ASRock 890FX Deluxe4). I get only stereo sounds if I use SPDIF connection, in general. My amp shows that is getting surround sound only when I use the Test feature of Windows 7. This test feature allows to know which formats are supported by the audio chip. The tests render correctly both Dolby Digital and DTS. You can find this test under Sounds, Playback Devices, Select Digital Audio, then "Properties". I am using Windows 7 x64, with the latest drivers from the official Realtek website. I also tested other driver versions, both from the Realtek website and from the ASRock one, but had no luck. Thanks for the help. Some specs: CPU: AMD Phenom II X4 965 MOBO: ASRock 890FX Deluxe4 (with onboard Realtek ALC892) Audio amp: Onkyo R-380 (works fine with other sources like PS3 and Xbox 360)

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• I can't get router and switches configured properly for my home office network

  - by BernicusMaximus

  Networking Gurus, I recently built a new detached garage, with an office above. As such I had it tied into my existing home ethernet wiring. The ethernet signal is coming into the garage just fine, but I can not get my network configured the way I want because of problems trying to link the various router/switch devices. Please see the following links for the network diagrams: Home Network So basically, I can't my future state to work. I'm not sure if I'm using incompatible switches or what, but I tried the future state with some 4 port switches from best buy and had no luck. I resorted to setting up the Current State so I could operate. What I am looking for is help on how best to get my future state to work. Is this possible with my current configuration, and if not, what should I do? Any help is appreciated. Thanks, Bernie

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• Ubuntu Server on Proliant ML350 G4

  - by eduardoavdr

  Hi Everyone, I have been given the task to change OS of a HP Proliant ML350 G4 server, and I decided to use Ubuntu server edition for that matter. The thing is that the server has already installed Windows server 2000 on the only Hard drive it has (SCSI). My question is, could I install an IDE HD on the IDE connection it has and install ubuntu without overwritting the boot configuration, so if I wanted to go back to the windows 2000 server installation with no problems? It also has a tape drive which is used for backups. Do you guys know how buntu deals with such devices? Thanks for your time

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• How does ARM Cortex A8 compare with a modern x86 processor

  - by thomasrutter

  I was wondering how does a modern ARM chip based on ARM Cortex A8 compare, in clock-for-clock performance and capability, to a modern x86 chip such as a Core 2 Duo or Core i5? I realise due to the different instruction sets it'll depend heavily on what you're doing. To put it another way, rendering a web page in webkit on a 1GHz ARM Cortex A8 based chip should be about equivalent to doing in on a Core i5 at __ MHz? Update October 2013: Since I asked this question years ago it's become a lot more common, when reading about mobile devices, to see architecture-agnostic benchmarks that you can compare across platforms - for example, in-browser benchmarks like Sunspider in Webkit will run on just about anything and you see these in reviews all the time now. And there's things like Geekbench now.

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• Getting triple-tap for Gyration Media Center remote working in Windows shell

  - by Lunatik

  I have this Gyration remote which, out of the box, does not support triple-tap for text entry outside of Media Center; only numbers can be entered in the Windows shell. Gyration have a patch that supposedly allows this, but it hasn't worked for me. I'm not alone in this regard it seems though. I've seem some discussion on removing and reinstalling USB devices to get this working, but nothing I'd really trust not to screw something else up. Does anyone have any tips for getting this functionality working properly?

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• Proper network configuration for a KVM guest to be on the same networks at the host

  - by Steve Madsen

  I am running a Debian Linux server on Lenny. Within it, I am running another Lenny instance using KVM. Both servers are externally available, with public IPs, as well as a second interface with private IPs for the LAN. Everything works fine, except the VM sees all network traffic as originating from the host server. I suspect this might have something to do with the iptables-based firewall I'm running on the host. What I'd like to figure out is: how to I properly configure the host's networking such that all of these requirements are met? Both host and VMs have 2 network interfaces (public and private). Both host and VMs can be independently firewalled. Ideally, VM traffic does not have to traverse the host firewall. VMs see real remote IP addresses, not the host's. Currently, the host's network interfaces are configured as bridges. eth0 and eth1 do not have IP addresses assigned to them, but br0 and br1 do. /etc/network/interfaces on the host: # The primary network interface auto br1 iface br1 inet static address 24.123.138.34 netmask 255.255.255.248 network 24.123.138.32 broadcast 24.123.138.39 gateway 24.123.138.33 bridge_ports eth1 bridge_stp off auto br1:0 iface br1:0 inet static address 24.123.138.36 netmask 255.255.255.248 network 24.123.138.32 broadcast 24.123.138.39 # Internal network auto br0 iface br0 inet static address 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 bridge_ports eth0 bridge_stp off This is the libvirt/qemu configuration file for the VM: <domain type='kvm'> <name>apps</name> <uuid>636b6620-0949-bc88-3197-37153b88772e</uuid> <memory>393216</memory> <currentMemory>393216</currentMemory> <vcpu>1</vcpu> <os> <type arch='i686' machine='pc'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='cdrom'> <target dev='hdc' bus='ide'/> <readonly/> </disk> <disk type='file' device='disk'> <source file='/raid/kvm-images/apps.qcow2'/> <target dev='vda' bus='virtio'/> </disk> <interface type='bridge'> <mac address='54:52:00:27:5e:02'/> <source bridge='br0'/> <model type='virtio'/> </interface> <interface type='bridge'> <mac address='54:52:00:40:cc:7f'/> <source bridge='br1'/> <model type='virtio'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> </devices> </domain> Along with the rest of my firewall rules, the firewalling script includes this command to pass packets destined for a KVM guest: # Allow bridged packets to pass (for KVM guests). iptables -A FORWARD -m physdev --physdev-is-bridged -j ACCEPT (Not applicable to this question, but a side-effect of my bridging configuration appears to be that I can't ever shut down cleanly. The kernel eventually tells me "unregister_netdevice: waiting for br1 to become free" and I have to hard reset the system. Maybe a sign I've done something dumb?)

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