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• mkisofs creating iso file with no error or warning but iso corrupted

  - by user1291203

  I'm trying to make a dvd from mpeg2 files. First of all i'm on windows 7. I'm using the following binaries: jpeg2yuv mpeg2enc mplex spumux dvdauthor Now everything is fine till this point absolutely no errors, but then i'm using mkisofs to make the iso file also no errors or warnings. It creates the iso file but i cannot burn it to dvd it said: The selected disk image file isn't valid. I tried it on a Mac osx as well and there the iso is worked fine. It is an NTSC iso. I'm totaly stuck with this problem any help is really appreciated.

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• Overriding destination directory from ROBOCOPY Job file?

  - by marc_s

  I am using Robocopy for backing up my project directories to an external disk, and it works like a charm. Except for one little issue: sometimes, I wish I could override the destination directory which I specify in my Robocopy Job file (myproject.rcj) to send the files somewhere else. So if I have this in my myprojects.rcj: :: Robocopy Job MYPROJECT.RCJ :: Source Directory : /SD:d:\MyProject :: Source Directory. :: Destination Directory : /DD:f:\MyDefaultDestination :: Destination Directory. is there any way I can instruct Robocopy to use a different destination when executing it using a job? So I execute Robocopy like this: robocopy /job:myproject.rcj and I wish I could override the default destination directory by using: robocopy /job:myproject.rcj /DD:X:\OtherDestination but that doesn't seem to work..... ERROR : Invalid Parameter #2 : "/DD:X:\OtherDestination" Any ideas??

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• Tokyo Tyrant ulog / update log management.

  - by Nathan Milford

  I'm testing Tokyo Tyrant in a master-master setup and have found the ulog grows out of control and locks up the disk. At first I found the -ulim option useful and limited the logfile size, however it simply rolls over to a new log, leaving the old ones to clutter up the partition. I suppose I'll write a shell script that will delete ulogs older than X, once I find out how far back Tokyo Tyrant needs in the update log in order to failover. Does anyone have any experience with this Tokyo Tyrant? Do you have a feel (acknowledging that every install is different based on what is being stored) for the optimal ulog size vs how far back a Tokyo Tyrant instance needs to look in the ulog to assume master status? Thanks, nathan

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• Which process is using my NAS?

  - by sethu

  I have a nas connected to my cluster. The NAS holds all our home directories. When I did a set of experiments last week, saving a 1 GB file to the nas took around 30 seconds. If i do the same to a local disk it takes 18 seconds. But when I tried doing the same process today, it takes 150 seconds. I am unsure what is the problem . Can someone help me pointout the issue? Is it possible to find out which process is accessing the NAS or how much NAS bandwidth is getting used ? Thanks for your help. -Sethu

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• Unable to see External HDD in Windows Explorer

  - by Jamie Keeling

  I have bought a 320GB External HDD which I want to use with my Playstation3. I know it will only work with a Fat32 file system so using some free HP software it formatted it, unbeknown to me it will only work up to 32GB. After seeing this I panicked, downloaded Partition Wizard Home Edition and deleted the partition. As I was about to create a new partition to put it back to NTFS (I'd just wanted to be able to use it in the first place at this point) I accidently knocked the cable out of my computer for the HDD and after replacing it the External HDD is no longer recognised by the My Computer option, Disk Management asks me to initialise the disc using MBR but it fails saying "Copy protected". Even the partitioning software I previously mentioned can't do anything about it, all it says is "Bad Condition" and I can't perform any operations on it. Would anybody be able to guide me in getting this sorted? I'm terrified i've wasted a perfectly good 320GB HDD.

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• Problem with using sysprep tool for running Windows on a different Hardware

  - by Usman Ajmal

  Hi, I am using sysprep tool for running Windows 7 on a different Hardware. What I do is that run sysprep on a computer, select System Audit, check the Generalize check box, select Shutdown, click OK and wait for the computer to shutdown. When the system shuts down, I remove the hard disk from my computer and plug it into another computer having different Hardware. Then I turn ON the computer and after a series of operations (including one reboot), I eventually get to the Desktop of Windows on the changed hardware computer BUT the problem is that System Preparation Tool's start up automatically. I rebooted the computer but the System Preparation Tool start up each time. One more thing that noted was that computer gives a message at each reboot before loading Desktop that "System is now preparing your computer for first use". Any idea how can i get a clean Desktop after performing sysprep? or is there any step I am missing? Thanks a lot

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• Windows 7 CHKDSK log - What is "Internal Info"?

  - by Ron Klein

  If I run Disk Scan (CHKDSK) on Windows 7, I get the log in the event viewer. If I look inside it, I can see some kind of a binary dump: Internal Info: 00 4f 05 00 53 4a 05 00 ec 46 09 00 00 00 00 00 .O..SJ...F...... fa 03 00 00 5c 00 00 00 00 00 00 00 00 00 00 00 ....\........... 48 93 42 00 50 01 41 00 f8 1f 41 00 00 00 41 00 H.B.P.A...A...A. Is there any meaningful information in that field, other than debug info for the programmers who developed this tool?

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• Can Windows log CryptoAPI CRL timouts?

  - by makerofthings7

  We have several .NET applications that occasionally "act slow" with no CPU or disk access. I suspect that they are hung up on authentication when trying to validate the certificate, since the timeout is almost 20 seconds. As per this MSFT article Most applications do not specify to CryptoAPI to use a cumulative time-out. If the cumulative time-out option is not enabled, CryptoAPI uses the CryptoAPI default setting which is a time-out of 15 seconds per URL. If the cumulative time-out option specified by the application, then CryptoAPI will use a default setting of 20 seconds as the cumulative timeout. The first URL receives a maximum timeout of 10 seconds. Each subsequent URL timeout is half of the remaining balance in the cumulative timeout value. Since this is a service, how can I detect and log CryptoAPI hangs for applications I have sourcecode to, and also 3rd party

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• How to move linux executables to a ramdisk?

  - by alfa64

  i've made a ramdisk this way: mkdir -p /media/ramdisk mount -t tmpfs -o size=512M tmpfs /media/ramdisk/ The reason for this is because i run a lot of node.js scripts and their execution time is very small, but i suspect that the time overhead is because it reloads the node.js executable from disk and destroys it on each subsecuent run. So i think this might be the solution to gain a bit, if not much, performance. How can i move a program like node to the ramdisk and run it from there? The idea is to have a startup script that creates the ramdisk and puts the node files inside of it. Note that i'm currently using fedora 16 for what's it's worth. Thanks in advance.

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• Recover lost NTFS partition on SSD

  - by Emil

  Hello, About 2 month ago I upgraded my Dell Latitude E6500 laptop with a Corsair Force F120 SSD drive. Everything worked well until about a week or so back. I started the computer and was faced with a beep and a message saying "No boot sector on Internal HDD (IRRT). No bootable devices". Since I figured that the boot sector had somehow got corrupt I tried booting from the Windows 7 dvd in order to repair the boot sector. But the Windows 7 installation program only found a blank drive with 111GB of unallocated space. I panicked and brought the drive with me to work to let a colleague have a look at it. We made a disk image of the entire drive and ran the drive through Testdisk in Linux. Testdisk did not find any partitions. It appears that the drive has been completely erased... What has happened? What is causing this behavior on an SSD?

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• RAID 0 performance gains?

  - by NickAldwin

  I'm building a new computer over the summer. I'm fairly competent in computer hardware, and am thus building the computer from scratch. I have everything planned out, but I was wondering about RAID. I asked which RAID I should use earlier, but now that it's pretty clear that RAID 1 isn't really that great, I think I'll go with cloud-backup instead of disk-redundancy. However, I still face a choice: use two 1TB drives as two 1TB drives, or combine them into a RAID 0 striped array. Is there any performance gain at all? I know that if one drive dies, everything is gone, so is the performance gain worth it? I'm building a pretty advanced computer, with SLI video cards and a fast CPU, so I'm thinking RAID 0 would give me some good hard drive performance. From your experience, is RAID 0 viable?

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• PostgreSQL 9.1 Database Replication Between Two Production Environments with Load Balancer

  - by littleK

  I'm investigating different solutions for database replication between two PostgreSQL 9.1 databases. The setup will include two production servers on the cloud (Amazon EC2 X-Large Instances), with an elastic load balancer. What is the typical database implementation for for this type of setup? A master-master replication (with Bucardo or rubyrep)? Or perhaps use only one shared database between the two environments, with a shared disk failover? I've been getting some ideas from http://www.postgresql.org/docs/9.0/static/different-replication-solutions.html. Since I don't have a lot of experience in database replication, I figured I would ask the experts. What would you recommend for the described setup?

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• Linux partitioning problem

  - by Claudiu

  I am using cfdisk to repartition my hdd as from OS install I only got 1 big partition a swap. I wanted to resize the big partition to 1 GB /boot and use the rest of the space for an extended partition. After I do cfdisk, I recheck the partitions with fdisk -l and I get these: Disk /dev/sda: 320 GB, 320070320640 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda3 1 38455 308881755 f Extended LBA Warning: Partition 3 does not end on cylinder boundary. /dev/sda2 38455 38698 1951897 82 Linux swap /dev/sda1 * 38699 38913 311349654 83 Linux My problem is the Warning message, I think I know the cause, I think its because of sda1 Blocks size. How could that be soo big if Start and End interval is small?

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• Windows Installer using usb drive for temp purposes

  - by Douglas Anderson

  When installing apps that are built around Windows Installer, it would appear that it often uses my external usb hard disk (when it's connected) as the temp location while it expands and installs the application (creates a folder off the root with a guid name). Is there anyway to change this so it always defaults to a specific drive? This appears to be the case on Windows Vista and 7, not sure about previous releases. EDIT: Current environment variables look like this: TEMP=C:\Users\<me>\AppData\Local\Temp TMP=C:\Users\<me>\AppData\Local\Temp EDIT: I have a funny suspicion that it's using the drive with the largest available free space.

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• Single/Mulitple LUN for vmware vm hosting

  - by Yucong Sun

  I'm building a iscsi storage system for hosting about ~500 Vmware vm running concurrently. And I have a disk array with 15 disks, I only need moderate write performance but preferably not SPOFed. so, that leaves me with RAID1 / RAID10 , I have couple choices: 1) 3x LUN 4disk RAID10 + 3 hot-swap 2) 1x LUN 14disk RAID10 + 1 hot-swap 3) 7x LUN 2disk RAID1 + 1 host-swap Which way is better? Is there a real problem running 500 vms on single LUN? and would it be better to resort to 7 LUns so each VM is better isolated with each other?

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• Changing Windows Media Center StartRecording Task Scheduler options

  - by T Reddy

  Hi, I'm experiencing some occasional crashes waking from sleep and I believe it may be related to the Corsair SSD F40GB2 as my boot disk...or the new Ceton tuner I recently installed... I dunno what the real problem is as I can't reproduce the problem manually. I read somewhere that I should not allow the hard disks to sleep...so I'm trying that in the meantime... At any rate, I don't really care that the computer crashes so long as WMC will start recording the task as soon as possible...the task is scheduled to wake the computer 5 minutes before the recording starts. I noticed that there is a StartRecording param in the Media Center folder in Task Scheduler. There is an option (currently unchecked) that will retry a failed task. I would like to know if there is a way to enable that checkbox. My hope is that if my PC crashes when waking up for this task, that after it reboots the task will trigger again and start recording. Thanks!

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• Wyse Z Class Thin Client (WES7) Image Deployment

  - by nsr81

  We are currently working on deploying a few Wyse WES7 thin clients (Z Class, exact model escapes me at the moment). We have WDM setup, and are able to see new clients show up, interact with them, pull/push images. Our current workflow is something like this: Unpack & boot up the device Disable Windows Firewall, reboot Device shows up in WDM Publish our custom image to the new device. My question is whether or not there is a way I can bypass step 2, and put my image on the client right out of the box. Either using PXE or USB boot disk, such that I can boot into some sort of menu and tell the client to pull a particular image from the WDM server. With HP thin clients, we have a rule setup which detects new clients on the network and pushes our custom image to them first time they show up. I haven't been able to figure it out with Wyse.

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• Dell e4300 Random Beeps

  - by Mikey.B

  I’ve noticed that my Dell e4300 Laptop will randomly beep every now and then. The symptoms are virtually identical to the issue described here: http://en.community.dell.com/support-forums/laptop/f/3518/t/19314488.aspx Any ideas why? I thought it might be related to hard drive activity so I downloaded the western digital disk utility and all tests check out fine. It’s not a big deal and it only beeps once every few days. I just want to make sure there isn’t a larger problem looming. =) -M

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• Fixing Windows 7 hibernation

  - by 80skeys

  I've been mucking around with the partitions on my laptop (I'm an experienced Linux/grub guy) and have somehow ended up affecting the ability of Windows 7 to go into hibernate mode. All other functionality seems to be okay. But when I press Hibernate, it behaves as if it starts to (screen goes dark, a little disk activity) but never powers off and if I move the mouse the login screen instantly comes up. I don't know if Window uses a separate partition for hibernation? There is a 200MB partition on the drive - I seem to recall it was related to diagnostics or some other Windows- boot menu stuff. In any case, wondering if there's some commands I can run to restore the ability to hibernate and also which partitions need to be marked "active" and if there's anything I need to do to the MBR of the hard drive or the MBR of the Windows partition? As I said, Windows boots fine as long as it is designated the Active partition. I just need to fix Hibernation.

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• Kubuntu 9.10: LUKS-encrypt entire partition

  - by Adam Matan

  Hi, In older versions of Ubuntu, mainly 8.04, I could encrypt en entire partition using LUKS, and mount it as /. the /boot directory was mounted on another partition. At boot time, I had to enter my password to enable any access to anything other than /boot. In Kubuntu 9.10, I only have the option to encrypt my /home/adam directory, which is a bit of a problem for me because I have sensitive data located in other directories. Any ideas how to set up LUKS for the entire disk, preferably during installation? Thanks in advance, Adam

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• Centos Xen resizing DomU partition and volume group

  - by thepearson

  I have a setup like so: Dom0 LV | DomU Physical Disk | | XVDA1 XVDA2 (/boot) (DomU PV) | VolGroup00 (DomU VG) | | LogVol00 LogVol01 (swap) (/) I am trying to resize the DomU root Filesystem. (VolGroup00-LogVol01) I realize that I now need to resize the partition XVDA2, however when I try doing this with parted on Dom0 it just tells me "Error: Could not detect file system." So to resize the root part VolGroup-LogVol00 shouldn't the process be: # Shut down DomU xm shutdown domU #Resize Dom0 Logical volume lvextend -L+2G /dev/volumes/domU-vol # Parted parted /dev/volumes/domU-vol # Resize root partition resize 2 START END (This is where I get an error) "Error: Could not detect file system." # add the vm volume group to Dom0 lvm kpartx -a /dev/volumes/domU-vol # resize the domU PV pvresize /dev/mapper/domU-pl (as listed in pvdisplay) # The domU volume group should automatically adjust # resize the DomU lv lvextend -L+2G /dev/VolGroup/LogVol00 And then obviously increase the fs, remove the device from kpartx etc The problem is I dont know how to resize the partition? How do I resize this partition so I can run pvresize on the DomU? Thanks

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• Build a RAID-5 USB Array or NAS?

  - by TK Kocheran

  I'm looking to build a RAID-5 or RAID-6 hard disk array to be used as a centralized backup location for my home network. I have a lot of 4-8GB DVD ISO files which I intend to serve over the network to my TV using DLNA or something similar. I need decent write times, fast read times, and preferably a way to connect this array to my network router over USB. I'll probably be using ext3/4 on it (I'd use btrfs if my router supported it :-[). Is there a way to build a RAID array that is accessible over USB? I'm kind of new to this and most guides assume you're running a RAID array inside your machine. I need at least 5TB of space, and I need redundancy, so I prefer RAID-6. How can I go about accomplishing this?

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• pcap stream rotation and pruning

  - by pilcrow

  Some of my servers collect a lot of packet data. Is there a utility (or patch to tcpdump(1)) to log a pcap stream to disk which: Rotates based on size of data written Prunes written files, keeping only the N most recent Does not re-use output filenames Is self-contained (Ruling out, e.g., a rotation with external pruning via crond(8)+tmpwatch(8)) Basically I want a multilog or svlogd that groks the pcap record format. The -W filecount option of tcpdump-4.0.0 "prunes" by recycling old filenames, which violates #3 above, forcing me to consult mtimes to determine recency and providing no guarantees against surprise truncation of the log file. The -G option introduces strftime(2)-specifier support in output filenames, which would give me at least second-precision in file names, but I can't figure out how to get pruning to work with this scheme.

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• mac: How to mount ejected external hdd again

  - by Maurice Kroon

  I've used my WD My Book 1TB for quite some time now. I always simply unplug it without officially 'ejecting' it. However, yesterday I did eject it (the partitions) before unplugging it. However, now, when i reconnect the hdd, it does not show the drives. It only shows the WD SmartWare partition (which is empty btw). The rest doesn't start. Does anyone know how to mount an unmounted disk? thx in advance!

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• How can I recover a huge folder that's been converted to a zero kb file on an NTFS partition?

  - by aalaap

  I have a 1TB drive with two 500GB partitions. One of them is being used as a Mac OS X Time Machine back up drive and the other one was NTFS and being used for storage. I had my entire 'iTunes Music' folder stored on it. Recently, there were some errors on the NTFS drive that caused chkdsk to run when in Windows, and it removed a lot of corrupt files. In this process, it converted my 'iTunes Music' folder into one zero KB file. How can I recover this? The partitions are intact and the other data on the disk is still accessible. It's just the 'iTunes Music' folder that's gone.

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