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• WD My Passport Essential SmartWare External Hard Drive

  - by Acer

  Hi Ive been gifted a My Passport SmartWare External Hard Drive(500gb). I used it and it works fine and installed WDSmartWare The Second time i used it,still fine,but I took it out without using the "Safely Remove Hardware" So the third time I used it,there's a bubble come out that says: USB Device Not Recognized One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it.For assistance in solving the problem, click this message. I tried connecting it to other USB Ports but it didn't work I tried Uninstalling WDSmarWare and connect it but it didn't work Please help me I like this hard drive so much and I spoilt it easily XD P.S I think about 13% has been used up in the Hard Drive P.S.S Other USBs can work fine in the computer P.S.S.S I tried connecting it to other computer and works fine OMG

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• Postfix performance

  - by Brian G

  Running postfix on ubuntu, sending alot of mail ( ~ 1 million messages ) per day. loads are extremly high but not much in terms of cpu and memory load. Anyone in a similiar situation and know how to remove the bottleneck? All mail on this server is outbound. I would have to assume the bottleneck is disk. Just an update, here is what iostat looks like: avg-cpu: %user %nice %system %iowait %steal %idle 0.00 0.00 0.12 99.88 0.00 0.00 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 12.38 0.00 2.48 0.00 118.81 48.00 0.00 0.00 0.00 0.00 sdb 1.49 22.28 72.28 42.57 629.70 1041.58 14.55 135.56 834.31 8.71 100.00 Are these numbers in line with the performance you would expect from a single disk? sdb is dedicated to postfix. I think it is queue shuffling, from incoming-active-deferred More details from questions: Server: Quad core Xeon(R) CPU E5405 @ 2.00GH with 4 GB ram Load average: 464.88, 489.11, 483.91, 4 cores. but the memory utilization and cpu is minimal Postfix instances between 16 - 32

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• Merit and demerits for various Linux fiberchannel multipath options

  - by wzzrd

  On our Linux servers, we currently use HPs qla2xxx drivers, because it has multipathing (active/passive) built in. The are, however, various other options, like Red Hats device-mapper-multipath with the stock qla2xxx drivers (multibus and failover) and things like SecurePath and PowerPath (both of which can do trunking, iirc). Can someone tell me what the merits and demerits of the various options are (if I can ask such a question), besides the obvious fact that the {Secure,Power}Path options cost vast amounts of money? I'm mainly interested in the freely available options, like HPs qla2xxx vs. Red Hats multipathd and possible other open source solutions, but I would like to hear good reasons to go for the commercial solutions too. UPDATE: I'll be benchmarking various options the coming few days (the average of 10 runs of iozone for each option (options being native qla2xxx failver, native qla2xxx multibus, HP qla2xxx failover)). I'll post a summary of results here for those interested.

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• Windows 7 does not recognise second display output

  - by gilles27

  I've got a PC with dual BenQ G2222HDL monitors and an ATI Radeon HD 4650 video card. I've been running both monitors at 1920x1080 for some months now but last week the second monitor switched to a lower resolution and won't let me go back to 1920x1080. If I right click the Desktop and choose Screen Resolution from the menu, I get two items in the Display: drop down list BenQ G2222HDL D-SUB Display device on: VGA In the past 2 was always the same as 1. If I click Detect a third item appears Available display output on: ATI Radeon HD 4650 but if I use the Multiple displays: drop down list to use it says "No display detected" and then lets me choose from either "Connect anyway on S-Video" or "Connect anyway on Component", neither of which help. It seems like Windows 7 recognises the card is dual-head, and knows I have got two monitors, but can't link it all together. I have checked and all my drivers are up-to-date. Does anyone have any suggestions as to how I can get the second monitor working properly again?

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• Wi-Fi performance in Windows 8 RP on a MacBook Air (mid 2011)

  - by Steven Lu

  I was able to install the Boot Camp Windows software using the executable that it provided, and there are no unrecognized or unknown devices in Device Manager. Wi-Fi works but it seems to be limited to an extremely slow 1.5Mbits. Network Center reports an 802.11n connection (at 65Mbps usually) but transfers never reach above about 200kB/s. Being limited to 1/20th of the connection speed of my internet service is quite frustrating. Does anybody experience the same issue? I have been trying to identify the Broadcom Wi-Fi chipset and a driver that I could try to upgrade to but I have made very little progress on Google on this front.

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• Fastest way to move files from a guest VM to the host?

  - by iTayb

  Hey there. I'm looking for the fastest way to copy files from a VM to physical servers. Setting up a network between them isn't a thing I'd like to do. I believe it is much more secure when not having one. VMware suggests using the Copy-VMGuestFile cmdlet from their PowerCLI interface, however I find it slow (Running at approximately 1.5MB/s). I thought of the following: Creating a new virtual hard drive, moving the files in, and download the .vmdk file from the server, then extracting it locally. It is possible, however will not work with working VMs, and I don't want to shut-down the VM every time I want to move files. Use the virtual floppy device and download the .flp file. It works even if the VM is running, but it is limited to 2.8MB. Do I have any other way? I'm using ESXi 4.1. Thanks.

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• How can I get data off of a Corsair SSD?

  - by user1870398

  My Corsair SSD won't work and I have some critical data on it that I didn't back up (I needed to create a copy of my mechanical storage device, just forgot). The drive isn't detected by the OS or BIOS. I also tried it on another system, but all that happened was the OS failed to load (my guess was that it knew the drive was there, just couldn't read it). I tried powering it on without the data cable for a bit of time to see if it'd work again, but it didn't. Any ideas of how I can get the data off of this drive without having to send it in?

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• Backup strategy for Windows Server 2008 R2 and Hyper-V

  - by winserveradmin

  I am in the process of planning a Hyper-V deployment with SCVMM 2008 R2. I have several VMs on VMWare Player (temporary solution) for stuff like Sharepoint 2007, 2010, and a couple of other server apps. I want to develop a resilient backup plan for this. On the software side, Data Protection Manager 2010 will support all of the server apps I run (sQL Server 2008 R2, Sharepoint, Exchange, etc). But on the hardware side (storage), what is the best way to go? Drobo seems to have issues with Hyper-V juding by a few threads on here and doesn't support DPM 2010 (which is in beta anyway) but not even the 2007 version (see http://www.drobo.com/support/best_practices.php). What storage device would work well? Do I need a home server or just an external usb drive? Capacity wise, 2tb will probably be best so I can have a small archive and implement a round-robin system. Thanks

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• HD Video Capture Card w/ Good API?

  - by Sheep Slapper

  Does anyone here know of a good HD video capture card that has a good (comprehensive) API? I administer a few servers that do some video encoding right now, but when we make the switch to HD cameras, they won't be sufficient. In addition to this, the servers we have now are black boxes, closed to me except to start/stop the video capture device. I'd like to be able to roll my own, so we can better integrate it with our existing systems, but I know almost nothing about what kind of HD capture cards are out there, and if I can avoid spending money just to test their APIs that would rock. So does anyone have any experience with this? All our other software is in C#, and I'd like to set up the new servers with web interfaces to start/stop the capture (also in C#, using .NET 3.5 probably). I'm not sure how language specific these APIs would be, but that's what I'm working with just as a reference point. I appreciate any help the community can give!

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• How would I add a second physical hard drive to proxmox

  - by Cygnus X

  I installed proxmox on a single 250GB hard drive and I would like to add a second identical hard drive to put more VM's on. I already tried once, and didn't get very far. I added it and formatted it as an ext4, but when I went to use the disk, it said only 8GB was available. That's not quite right. So I did some searching and found that I had to make the device ID 8e for a linux lvm. After I did this, it said I had to restart, so I did... and it wouldn't boot!!! What did I do wrong? And how do I do it right? (I know I could throw in a RAID card and do a RAID 0, but I'd rather not).

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• software RAID array not starting in initramfs on Debian

  - by Jasper

  One of my Debian servers (kernel 2.6.30-AMD64) refuses to start the software RAID array that houses the root partition in initramfs. It dumps me with a busybox console. When I follow the necessary steps to continue booting it works fine (start the array with mdadm -A and then have LVM scan the volumes with pvscan and then vgchange -ay). I've tried starting with boot options rootdelay=10 to no avail. Also I've updated the initramfs and unpacked it to inspect whether it really tries to assemble the raid array (it does). Output before dumping to console : mount: mounting none on /dev failed: No such device W: devtmpfs not available, falling back to tpmfs for /dev and then some lvm messages saying it can't find the volumes holding the root partitions. Does anybody have a clue how I could fix this?

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• Create new partition on live production CentOS server

  - by Kimmel

  I have a production server that is running on CentOS. I'd like to create a partition on the server without having to reinstall everything. I have CLI and VNC access to the remote server. Is there anyway that I can create a partition safely? Here's my output from fdisk -l Disk /dev/sda: 85.9 GB, 85899345920 bytes 255 heads, 63 sectors/track, 10443 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00033d5e Device Boot Start End Blocks Id System /dev/sda1 * 1 10444 83885056 83 Linux Thanks.

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• How to add new partition to RAID-1 array on Redhat FC10?

  - by Peter Scott

  I have a RH FC10 system with RAID 1 partitions, here is mdadm.conf: # mdadm.conf written out by anaconda DEVICE partitions MAILADDR root ARRAY /dev/md1 level=raid1 num-devices=2 metadata=0.90 UUID=9588bfe1:ddfd5858:1067c814:ac499922 ARRAY /dev/md3 level=raid1 num-devices=2 metadata=0.90 UUID=3895ca46:c1526588:d48acd7e:c153aa83 ARRAY /dev/md4 level=raid1 num-devices=2 metadata=0.90 UUID=ebd4920f:b46c1f18:2eced24a:a21ca861 ARRAY /dev/md2 level=raid1 num-devices=2 metadata=0.90 UUID=048e8198:5d6d9682:d3a1e5c3:d475ad80 ARRAY /dev/md0 level=raid1 num-devices=2 metadata=0.90 UUID=d89ec2de:079d4be5:e00ee8f5:fcb19188 I want to carve off 500MB from md4 to make a new partition (for an AFS cache). I haven't touched mdadm or any other disk partitioning tools in years. md4 is 50GB and less than 10% used. What's the easiest way of doing this?

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• LVM2 vs MDADM performance

  - by archer

  I've used MDADM + LVM2 on many boxes for quite a while. MDADM was serving for both RAID0 and RAID1 arrays, while LVM2 where used for logical volumes on top of MDADM. Recently I've found that LVM2 could be used w/o MDADM (thus minus one layer, as the result - less overhead) for both mirroring and stripping. However, some guys claims that READ PERFORMANCE on LVM2 for mirrored array is not that fast as for LVM2 (linear) on top of MDADM (RAID1) as LVM2 does not read from 2+ devices at a time, but use 2nd and higher devices in case of 1st device failure. MDADM reads from 2 devices at a time (even in mirrored mode). Who could confirm that?

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• Resize underlying partitions in mdadm RAID1

  - by kyork

  I have a home built NAS, and I need to slightly reconfigure some of my drive usage. I have an mdadm RAID1 composed of two 3TB drives. Each drive has one ext3 partition that uses the entire drive. I need to shrink the ext3 partition on both drives, and add a second 8GB or so ext3 partition to one, and swap partition of equal size to the other. I think I have the steps figured out, but wanted some confirmation. Resize the mdadm RAID resize2fs /dev/md0 [size] where size is a little larger than the currently used space on the drive Remove one of the drives from the RAID mdadm /dev/md0 --fail /dev/sda1 Resize the removed drive with parted Add the new partition to the drive with parted Restore the drive to the RAID mdadm -a /dev/md0 /dev/sda1 Repeat 2-5 for the other device Resize the RAID to use the full partition mdadm --grow /dev/md0 -z max Is there anything I've missed, or haven't considered?

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• How do I use wine's new multi-channel audio support?

  - by Forest

  Wine supposedly added Multi-channel support to the ALSA driver in a recent release. However, I haven't found any documentation about it or any reports of anyone successfully using it. I have 5.1 surround sound through ALSA (not Pulse) on my linux system, yet games in wine don't seem to use anything more than stereo, no matter which ALSA device I select in winecfg. Can someone explain what must be done to get wine games to use all my speakers for positional audio, or failing that, point me toward some useful documentation on the new multi-channel support?

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• Forcing logon to Air Watch server upon joining wifi

  - by DKNUCKLES

  I'm setting up a wireless controller that I would like to leave as unsecured. When a user connects to this network they need to be forwarded to a specific page where they can authenticate with the Air Watch system they have in place. Once authentication takes place, a profile will be downloaded to their device and we can administer the devices accordingly. I'm mulling over how I can force the page to the user when they log in. The methodology I'm thinking about working with is creating a NAT rule for that VSC that would forward all port 80 and 443 traffic to the airwatch server. Once they authenticate, a profile will be downloaded which will connect the devices to an Virtual Access Point who's SSID isn't broadcasted. Is this methodology correct or can someone think of an easier / more efficient way of accomplishing this? The controller is an HP MSM720 for what it's worth.

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• Securing data sent to an unencrypted WiFi AP

  - by David Parunakian

  The business plan of a project I'm involved in assumes selling certain WiFi-enabled devices to end users. All these devices originally have an unencrypted connection and a standard SSID. The problem is that although the user can connect to it and set both a new SSID and a WPA passphrase, these are being sent to the AP in plain text and thus can be intercepted by anyone nearby with a sniffer. What's the best solution to this problem, and why? Initially set up an encrypted wireless network at the device and supply the user with a printed passphrase Buy an SSL certificate for the AP's default IP address or local domain name (the APs aren't supposed to work as a router and have a captive portal & dnsmasq installed, so all of them can pretend to be myunit.example.com, as far as I understand) Something different Thank you.

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• Network bottleneck/throttling issue

  - by Gavin

  Hi all, It's my first day at a new company and i've been given the task to find out an issue with the internet connection. I noticed that whilst I was downloading a large file, the network grinds to a halt, except for my download. At first I thought it was the internet connection/modem but it seems that whilst the lockdown occurs, I am unable to access any network device. Has anyone experienced this before and if so, do you have any pointers? Looking at the setup. They have an DSL modem that connects to a 10/100 switch. There are only 5-6 computers on the network. Cheers Gavin

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• Setup kickstart boot for all installation media types (cd and usb-flash)

  - by Cucumber

  I created own custom CentOS iso. I used mkisofs make it. This is part of my isolinux.cfg file: label vesa menu label Install ^RAIDIX system kernel vmlinuz append initrd=initrd.img xdriver=vesa nomodeset text linux ks=cdrom:/isolinux/ks.cfg If I specify parameter ks=cdrom:/isolinux/ks.cfg my iso will boot only from cd or dvd-rom. If I specify parameter ks=hd:<device>:/ks.cfg my iso will boot only from usb-drive. Can I specify ks parameter to boot from both type of installation media?

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• Enable automatic driver install in Windows XP

  - by Peter

  When Windows detects new hardware (be it graphic card or USB Peripheral) it automatically installs driver and if it can't find a driver it shows "Found New hardware wizard" that allows you to manually select a driver. My problem is that this "Found New hardware wizard" shows up every time when I plug a new device and I have to click Next Next Next.. until it finishes installation. It's just like in Windows 98 ;) I want to fix it to the way it's supposed to be. It's got nothing to do with "Windows Update" and "Driver Signing" settings in "System properties - Hardware" tab, those are on default settings. Here is the same problem I have, but those replies ale completely useless

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• External Hard-Drive Randomly Ejects; Stays On

  - by Kaleb F.

  My 250GB I/O Magic USB external hard-drive randomly disconnects / ejects from the computer after between 2-30 minutes of use. When this happens, the blinking activity light on the front of the hdd turns off; however, the disks can still be heard spinning. Unplugging & replugging in the USB does not reconnect the device and the activity light remains unlit. The only way to continue using it is to flip off then on the power switch of the hdd. The hard-drive was formatted with MBR partition table and 2 NTFS volumes. I recently tried switching to GUID with two Mac OS Extended (Journaled), but the problem remains. This error occurs with my new Macbook Pro with Snow Leopard as well as with my DELL E520 with Windows 7 Ultimate.

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• Delay between printing via lp in opensuse

  - by adamweeks

  I am experiencing a 10-15 second delay when printing multiple documents to a barcode printer in opensuse. I have had the same setup on other systems with older versions of opensuse without any issue. The setup is as follows: The print queue is setup as a "generic with driver Raw Queue". The files being sent down to the printers are simple text files with the lp command: lp -dprinter1 /path/file The printer is a JetDirect compatible device (Intermec brand) with a standard 9100 port socket setup. If I send a multi-page document to the printer, it will print nonstop the multiple pages. If I send 2 or more text files down via separate "lp" commands, the delay will be there between each printout. I've tried multiple different printers and they all experience the same issue.

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• win7 amd64 guest in kvm does not have sound

  - by davidshen84

  hi, my host system is gentoo amd64, guest system is win 7 amd64. the guest system can work, except it does not have sound. i start kvm with -soundhw ac97, QEMU_AUDIO_DRV='alsa', and after i get into the guest system, i can see a 'Multimedia Audio Controller' in the device manager. but win7 cannot find the driver for it. i searched the network for a long time, and i cannot find a driver for intel ac97 for win7 amd64. i also tried -soundhw sb16, es1370, none of them work. please help me fix this.

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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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