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  • Tool to Save a Range of Disk Clusters to a File

    - by Synetech inc.
    Hi, Yesterday I deleted a (fragmented) archive file only to find that it did not extract correctly, so I was left stranded. Fortunately there was not much space free on the drive, so most of the space marked as free was from the now-deleted archive. I pulled up a disk editor and—painfully—managed to get a list of cluster ranges from the FAT that were marked as unused. My task then was to save these ranges of clusters to files so that I could examine them to try to determine which parts were from the archive and recombine them to attempt to restore the deleted file. This turned out to be a huge pain in the butt because the disk editor did not have the ability to select a range of clusters, so I had to navigate to the start of each cluster and hold down Ctrl+Shift+PgDn until I reached the end of the range (which usually took forever!) I did a quick Google search to see if I could find a command-line tool (preferably with Windows and DOS versions) that would allow me to issue a commands such as: SAVESECT -c 0xBEEF 0xCAFE FOO.BAR ::save clusters 0xBEEF-0xCAFE to FOO.BAR SAVESECT -s 1111 9876 BAZ.BIN ::save sectors 1111-9876 to BAZ.BIN Sadly my search came up empty. Any ideas? Thanks!

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  • High disk I/O activity in CentOS server

    - by triiim
    I have about 16 websites in a CentOS dedicated, and I am having some problems on high traffic hours, it seems to be a high disk I/O activity causing a general slowdown. I've installed atop and this is what I see on the bottom (the server has been restarted thats why the values are so low): *** system and process activity since boot *** PID RDDSK WRDSK WCANCL DSK CMD 1/18 2176 1.7G 7.3G 854.4M 39 mysqld 671 1248K 3.0G 0K 13 flush-8:0 566 0K 1.1G 0K 5 jbd2/sda2-8 2401 124.2M 529.1M 22408K 3 crond 2032 2.2G 502.0M 0K 12 nginx 2360 425.8M 115.3M 4188K 2 httpd flush-8:0 and jbd2/sda2-8 are the processes I see with iotop using 99% on the IO column, and they are the processes that write the most on the hdd (after mysql). From what I saw in google this could be caused by some ext4 related bug, the current kernel is: Linux srvr.com 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux I asked the hosting support to update the kernel and they tried but they now say that the server wont boot with the new installed kernel and they had to go back to the previous, they are not helping very much. Does someone has any idea how could I solve the high disk usage caused by flush-8:0 and jbd2/sda2-8 processes?

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  • Disk fragmentation when dealing with many small files

    - by Zorlack
    On a daily basis we generate about 3.4 Million small jpeg files. We also delete about 3.4 Million 90 day old images. To date, we've dealt with this content by storing the images in a hierarchical manner. The heriarchy is something like this: /Year/Month/Day/Source/ This heirarchy allows us to effectively delete days worth of content across all sources. The files are stored on a Windows 2003 server connected to a 14 disk SATA RAID6. We've started having significant performance issues when writing-to and reading-from the disks. This may be due to the performance of the hardware, but I suspect that disk fragmentation may be a culprit at well. Some people have recommended storing the data in a database, but I've been hesitant to do this. An other thought was to use some sort of container file, like a VHD or something. Does anyone have any advice for mitigating this kind of fragmentation? Additional Info: The average file size is 8-14KB Format information from fsutil: NTFS Volume Serial Number : 0x2ae2ea00e2e9d05d Version : 3.1 Number Sectors : 0x00000001e847ffff Total Clusters : 0x000000003d08ffff Free Clusters : 0x000000001c1a4df0 Total Reserved : 0x0000000000000000 Bytes Per Sector : 512 Bytes Per Cluster : 4096 Bytes Per FileRecord Segment : 1024 Clusters Per FileRecord Segment : 0 Mft Valid Data Length : 0x000000208f020000 Mft Start Lcn : 0x00000000000c0000 Mft2 Start Lcn : 0x000000001e847fff Mft Zone Start : 0x0000000002163b20 Mft Zone End : 0x0000000007ad2000

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  • Tools to partition dynamic disk

    - by rangalo
    Hi, I have a 1 TB hard-disk with windows 7 pre-installed. I would like to delete, resize some partition and create ext3/swap partitions to install linux. Which tools are available for this ? I tried gparted, it doesn't work.

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  • Disk Image Tools for Windows Server 2008

    - by Jon Rauschenberger
    I have a Windows Server 2008 X64 machine that I need to swap the boot drive on. I'd like to use a disk image/restore utility to make an image of the boot partition and restore that to the new drive. Does anyone know of a free or reasonably priced tool that can do this? I know that Acronis True Image will do it, but you need to have their server product to restore images of a server OS and it's prohibitively expensive ($850). Thanks, jon

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  • Dynamic Disk Start on Boot

    - by Xiuhtecuhtli
    Is there a way to make a Dynamic Disc Automatically Come on line after a reboot. at the moment i must manually Bring the disk "online". I was thinking a Startup Script would do the trick. does anyone know of a URL HOWTO or a Premade script to do this?

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  • How to display all disk partitions on desktop

    - by sagar
    Let's come to the point directly. Open Finder. Go to view menu - Show toolbar ( if it is hidden in your finder ) on the left top side you can see List of devices I have three disks over there. I want to add all those disk partitions on my desktop. Don't know how? Any one can guide ? Thanks in advance for sharing your knowledge. Sagar.

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  • Run VISTA disk check without reboot

    - by Chau
    I want to perform a surface scan on my harddisks (S-ATA, P-ATA, USB and E-SATA) in windows VISTA. Is it possible to do this without scheduling the scan on next reboot? It takes a lot of time and I would like to be able to use the computer during the scan. I can accept that this might not be possible on the window partition disk, but I cannot see why it shouldn't be possible on other disks.

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  • CPU/Mem/Disk utilization (average) after process has completed

    - by BassKozz
    Ubuntu Server 9.10 So there is the time command which will show you the time it took for a specific process/command to run after the command has completed. For example: :~$ time ls real 0m0.020s user 0m0.000s sys 0m0.000s I'd like to also collect the average CPU usage, Memory, and Disk (i/o) utilization after the process has completed using time (or another command if necessary). How can I accomplish this? Mainly I am using this to benchmark MySQL import performance using different innodb_buffer_pool_size settings.

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  • Do I need to replace my hard disk?

    - by Sneha Kamath
    Hello everyone. Whenever I start my computer Ubuntu pops up the following error: A hard disk may be failing one or more hard disk report health problems A friend of mine ran some test and it was found that my hard disk has 74 bad sectors. Is this merely a software issue that will be solved after a complete format of my hard disk, or is it a hardware issue and I will have to replace my hard disk? Awaiting your responses. Thanks, Sneha Kamath.

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  • Mac OS X missing disk

    - by leo
    In boot camp, it only see partition size to be 149G while disk utility shows only one partition with size 320G. Why diskutil and df gives me different sizes? Also how can i fix it? thanks df -h Filesystem Size Used Avail Capacity Mounted on /dev/disk0s2 **149Gi 20Gi 129Gi 14% /** devfs 110Ki 110Ki 0Bi 100% /dev map -hosts 0Bi 0Bi 0Bi 100% /net map auto_home 0Bi 0Bi 0Bi 100% /home and diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme ***320.1 GB disk0** 1: EFI 209.7 MB disk0s1 2: Apple_HFS Mac HD 319.6 GB disk0s2

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  • Stop windows 7 disk trashing when idle

    - by Konrads
    Hello, I installed Windows 7 on VMWare and it works just fine! However, when I leave the machine idling and work on my host OS, Windows 7 decides that it is a good idea to trash disk and kill performance. How do I disable these background processes? is it just indexer?

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  • Stop windows 7 disk trashing when idle

    - by Konrads
    Hello, I installed Windows 7 on VMWare and it works just fine! However, when I leave the machine idling and work on my host OS, Windows 7 decides that it is a good idea to trash disk and kill performance. How do I disable these background processes? is it just indexer?

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  • Stop windows 7 disk thrashing when idle

    - by Konrads
    Hello, I installed Windows 7 on VMWare and it works just fine! However, when I leave the machine idling and work on my host OS, Windows 7 decides that it is a good idea to thrash disk and kill performance. How do I disable these background processes? Is it just indexer?

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  • Macbook Pro Hard Drive won't shop up on disk startup

    - by Kristal
    I have a macbook pro from 2007. It came with an installation CD for 10.4.8. The first problem is that it won't even recognize the installation CD even though the CD seems perfectly fine. So I used another installation CD just to get me to the Disc Utility dialogue box. I went through the steps to erase the hard drive. However when I attempted to reboot the machine using Disc Startup there was no option for me to select the hard drive. Of course, since I don't have the appropriate installation disk in it won't let me install anything. What are my options? Do I need to ask Apple to send me a new installation CD for this computer? And why wouldn't the hard drive show up in the Startup options?

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  • Hard Disk Space Changes

    - by Write.
    I am currently running on Windows 7 x64, and have observe that my hard disk space is acting a little weird. Currently, my harddisk has 3 partitions, C:, D:, E:. Previously, before I delete a huge folder (30gb of data) from my D: drive, my C: drive has about 1gb left, while my E: drive has about 5 gb left. After deleting the 30gb of data (from D: drive), my space in D: drive has been recovered (but not sure if it's fully recovered), my C: drive which only had about 1gb left increased to 3. While my E: drive which had 5gb left dropped to 1. I was wondering if it has something to do with the fragmentations and whatsoever I always hear about in harddisk. Has anyone encountered similar issues or have an explanation to why it could be happening?

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  • Automating Disk Cleanup on Windows using commands

    - by Ram
    Hi, I asked this question on MSDN forum but there was no response.. Maybe I had posted in the wrong forum... So I'm posting it again here, hoping that someone might be able to help me out here... I am trying to run Disk Cleanup in the command prompt (and through a C# program) and so I went through all the available options from this link : http://support.microsoft.com/kb/315246 While I am just trying to understand what I can do, it would be good if someone could explain why the drive option /d cannot be set while specifying /sagerun:n Or is it possible, by some way, to run /sagerun for a specific drive? Pls suggest... Thanks, Ram

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  • How to increase the disk cache of Windows 7

    - by Mark Christiaens
    Under Windows 7 (64 bit), I'm reading through 9000 moderately sized files. In total, there is more than 200 MB of data. Using Java (JDK 1.6.21) I'm iterating over the files. The first 1400 or so go at full speed but then speed drops off to 4ms per file. It turns out that the main cost is incurred simply by opening the files. I'm opening the files using new FileInputStream (and of course closing them in time to avoid file leaks). After some investigating, I see that Windows' disk cache is using only 100 MB or so of RAM although I have 8 GiB available. I've tried increasing the cache size using the CacheSet tool but any values I provide are considered out of range. I've also tried enabling the LargeSystemCache registry key but (after rebooting) the CacheSet tool still indicates I'm using 100 MB of cache (and doesn't increase during the test run). Does anybody have any suggestions to "encourage" Windows 7 to cache my 9000 files?

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  • Disk quota problem in Windows Server SBS 2003

    - by deddebme
    I have got a new job and the existing SBS 2003 domain setup is unsecure (i.e. everyone is a domain admin etc etc). There are lots of problem due to inexperienced "network admin", and I am trying to fix them one by one. There exist one issue which I found quite weird, that the "Quota" tab exists in the C:(NTFS) drive but not the D:(NTFS) drive. I played around with gpedit to enable disk quota (it was "not configured" before), but still I can't see that tab. Have you seen this problem before? How did you solve it?

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  • Disk space profiling in Unix

    - by user1677770
    I'm looking for a tool to summarize how disk space is being used on very large partitions. Our file system is around 950TB, mostly broken up into 20TB partitions. There are some really nice graphical tools for visualising these file spaces: http://www.disksavvy.com/disksavvy_screenshots.html http://methylblue.com/filelight/ But I'm really not sure how well they will scale. Does anybody have any experience of these tools and can make any recommendations? Even something that parses and summarises a really big du output would be a good start.

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  • Automating Disk Cleanup on Windows using commandline

    - by Ram
    I asked this question on the MSDN forums but there was no response. Maybe someone might be able to help me out here. I am trying to run Disk Cleanup in the command prompt (and through a C# program) and so I went through all the available options from this link: http://support.microsoft.com/kb/315246 While I am just trying to understand what I can do, it would be good if someone could explain why the drive option /d cannot be set while specifying /sagerun:n Or is it possible, by some way, to run /sagerun for a specific drive? Thanks.

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