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  • Why is an Ext4 disk check so much faster than NTFS?

    - by Brendan Long
    I had a situation today where I restarted my computer and it said I needed to check the disk for consistancy. About 10 minutes later (at "1%" complete), I gave up and decided to let it run when I go home. For comparison, my home computer uses Ext4 for all of the partitions, and the disk checks (which run around once week) only take a couple seconds. I remember reading that having fast disk checks was a priority, but I don't know how they could do that. So, how does Ext4 do disk checks so fast? Is there some huge breakthrough in doing this after NTFS came out (~10 years ago)? Note: The NTFS disk is ~300 GB and the Ext4 disk is ~500 GB. Both are about half full.

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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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  • Not able to delete file from the server?

    - by kvijayhari
    I've a file called piture-list.php in my website... When i see them through the ftp client it shows two files with different filesizes.. as File name filesize picture-list.php 19818 picture-list.php 9063 When i select the file with 9063 and delete using ftp it deletes the file with the filesize 19818 then i used the command prompt to list files and happened to see actually there were two files one with the original name and other with a space before the filename (" picture-list.php").. I tried to move, delete the file but nothing is successful.. What may be the issue??

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  • Windows XP: how to disable automatic encryption on downloaded files

    - by T. Webster
    I have Windows XP SP3 and every file I download is automatically encrypted no matter what directory I save the downloaded file in. So it's not as simple as turning off encryption of any specific directory, the file will be downloaded as encrypted regardless of whether the directory is encrypted or not. Is there a policy or registry setting somewhere to disable this automatic encryption? (EDIT: I doubt it's malware since this OS was just installed on this machine. It's my work PC and by default I think there's some group policy or other setting which not only sets everything in My Documents to encrypted, but also everything I download, no matter where it's downloaded to. )

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  • Corrupted files, hard drive test?

    - by all-R
    Hi guys, I'm currently on a macbook with a 1TB external hard drive connected trough a USB hub wich is connected on my macbook. The problem is, my disk, wich is partitioned in 2 (one HFS+ and one NTFS) keeps getting corrupted, recently it was my HFS+ partition, I could not repair it using the Apple's Disk utility, but was able to backup my files. Is it synonym that my hard drive is failing? Is it because of my USB hub? I also keep all my iTunes library on my external HD (HFS+ partition), and did a lot of transfer lately, adding files, removing etc. the last time, my partition got corrupted after a lot of deleted items. If anybody has an idea of what to check first, what could cause the problem, I would appreciate it :) Thanks!

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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 bay 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?

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  • Files beginning with "._"

    - by Cliff_31
    Sometimes when my wife works on photos in Photoshop on her Mac, what she gives me back are all the photos I took, with their .jpg extensions in place, as well as a set of "ghost" files. That is, for every photo, there is an evil twin whose file name is the same ... except that it begins with "._". Also this ghost file are sort of "grayed-out" and don't open when double clicked. I suspect they are hidden files, (I have set windows to show all hidden files) but what find of hidden file -- on that, I'm clueless. I just delete these files and never have a problem with the photo (.jpg) files, but still I'm dying to know; what are they? Thanks

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  • how to write or what is the concept behind the file unlocker program

    - by Jach Many
    Recently i was trying to delete a file thinking that i had closed the program which is manipulating the file but it did not delete because the program was still running. I misunderstood that file as an unwanted file. So i used the file unlocker program to find which process is manipulating that file. That program really worked well by showing the process which was handling that file. and that file was http://download.cnet.com/Unlocker/3000-2248_4-10493998.html. What i want to know is i would like to write a program in win32 C or .net to mimic the same process. Just to find which process is handling which file. and if possible to close it. Or i want to know the concept behind that. I know this cannot be explained in a few paragraphs yet if i could get some references or external links to references then that could be nice.

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  • In Windows XP Professional, is there a limit on the number of files that can be contained in a single folder? [duplicate]

    - by Andrew
    This question already has an answer here: How many files can a windows folder contain? 1 answer I am running Windows XP Professional, service pack 3. Right now I have 4,398 files in a single folder, and Windows XP seems to read it fine. How many more files can I place in this same folder, either theoretically or practically? Thanks for your time.

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  • Missing files when Windows 7 returns from hibernate w/ dual boot

    - by Arthur N
    I have a dual-boot setup with Ubuntu (lucid) and Windows 7. I have the Windows file system shared on Ubuntu through Samba. Occasionally, I am working on Windows and my machine will go into hibernate (i.e. when the battery level is critical). By default, my GRUB settings boot me into Ubuntu. So when I get back to my PC, sometimes I just hop into Ubuntu instead of going back to Windows. However, if I write any files to the Windows file system during that Ubuntu session, the next time I do go back to Windows (which resumes from hibernate), those files are missing. Obviously, the state of the actual file system and the hibernate snapshot become out of sync, and Windows chooses the hibernate snapshot, overriding any changes I may have made thru Ubuntu. For now, I've disabled the hibernate option in the Windows power settings, but is there any utility I can use to get back some of those missing files?

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  • Tracing slow Java I/O in Solaris 10

    - by antispam
    We have a Java application which is significantly slower in Solaris 10 server than in Windows PC. We have profiled (-Xprof) the application and observed that UnixFileSystem.getBooleanAttributes0 method consumes about 40% CPU time with native calls. How can we follow our search to identify which is the cause of the slow behaviour? Thank you very much.

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  • Missing files when Windows 7 returns from hibernate w/ dual boot

    - by Arthur N
    I have a dual-boot setup with Ubuntu (lucid) and Windows 7. I have the Windows file system shared on Ubuntu through Samba. Occasionally, I am working on Windows and my machine will go into hibernate (i.e. when the battery level is critical). By default, my GRUB settings boot me into Ubuntu. So when I get back to my PC, sometimes I just hop into Ubuntu instead of going back to Windows. However, if I write any files to the Windows file system during that Ubuntu session, the next time I do go back to Windows (which resumes from hibernate), those files are missing. Obviously, the state of the actual file system and the hibernate snapshot become out of sync, and Windows chooses the hibernate snapshot, overriding any changes I may have made thru Ubuntu. For now, I've disabled the hibernate option in the Windows power settings, but is there any utility I can use to get back some of those missing files?

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  • Unable to delete a directory from NTFS drive: "Access is denied"

    - by EMP
    I'm running Windows XP Pro x64 SP2. I have a directory on an NTFS drive that was created by a Maven build. A subsequent build attempted to delete this directory and failed. I now get the error "Access is denied" whenever I try to do anything with that directory: change to it, delete it, rename it. This happens both in Windows Explorer and from a command prompt. The properties dialog in Windows Explorer doesn't even contain the Security tab. I created the directory, so I don't think this is truly a permissions issue. I've occasionally had this error happen in the past is well. I believe the error is misleading, but the question is: what is the real problem and how do I fix it?

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  • Open file without specifying exact location

    - by person
    Say I have a file in some obscure directory that I want to open and edit. I don't want to do something like this... vim ~/foo/bar/blah/doh/ugh.txt I'd rather be able to say find this file and open it. I know there are commands like locate and find to find a file or directory, but I'm not sure whether these can (or even should) be utilized in what I'm trying to do. Basically, what is the simplest way to open a file with a program w/o specifying its exact location? (In cases where there isn't another file with the same name in the entire system, and cases where there are multiple).

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  • I tried installing Ubuntu 10.04 and I got this message - any ideas on what to do?

    - by vette982
    No root file system defined. Please correct this from the partition menu. This message shows up when I first boot into Ubuntu after the installation. I installed it by mounting the ISO with Daemon Tools, and I just did the default Wubi installation. I keep reading everywhere that I need to choose my installation directory, but I don't get any option to do that. These are all the options I get for installation directory. I have a C and D partition on my drive, and I tried installing it on both and no luck either way. Any ideas?

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  • I tried installing Ubuntu 10.04 and I got this message - any ideas on what to do?

    - by user41926
    No root file system defined. Please correct this from the partition menu. This message shows up when I first boot into Ubuntu after the installation. I installed it by mounting the ISO with Daemon Tools, and I just did the default Wubi installation. I keep reading everywhere that I need to choose my installation directory, but I don't get any option to do that. These are all the options I get for installation directory. I have a C and D partition on my drive, and I tried installing it on both and no luck either way. Any ideas?

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  • Is there such a thing as a file hosted container which deduplicates data held within?

    - by Mallow
    Background I have backups of a website which stores all of it's data into a single file. This file is several gigs large and I have many different backups of this file. Most of the data within is mostly the same plus whatever was added or changed to it. I want to keep all the concurrent backups I've made through the years in case I find a horrible surprise of data corruption along the line. However storing a 10gig file every month gets expensive. Seeking Solution I've often thought about different ways of alleviating this problem. One thought that comes up very often combines the idea of a duplicating file system which doesn't require it's own partitioned volume on a hard drive. Something like what truecrypt does, what it calls, "file hosted containers" which when using the truecrypt program allows you to mount and dismount that volume as a regular hard drive. Question Is there a virtual hard drive mounter which uses file-based container which uses data deduplicaiton file system? (This question is a little awkward to put into words, if you have a better idea on how to ask this question please feel free to help out.)

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  • Strange loss of format on pen drive

    - by Kiewic
    Hi, here is an screenshot of my pen drive. The files are impossible to open, and the names have been replaced by strange characters. In Ubuntu is worst, the Windows system crash. What can I do to recover my information?

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  • Can I use Veritias Storage Manager to provide HA storage using server-local storage?

    - by Paul
    I have a need to provide an high-availability ftp/http file repository. Upload will happne to one server, but the uploaded file must be immediately visisble on all other servers I can handle the failover of the servers themeselves using load balancers. But in the event of failure of one server, the other servers must see the same contents of the repository. Normally, I'd use a SAN for this, but in this case the data centre standards do not allow SAN/external storage - all storage will be local to the servers. Cam I use Veritas Storage Manager (or any other product) to manage mirroring hte contents between servers in this way? Or does that require a SAN? I couldn't tell either way from a quick look at the data sheets etc.

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  • How to get back win32 executable file

    - by Ahmed Ezz
    i make something by wrong... when i right click into .exe file then choose OPEN with and i select choose a program then i select wrong program to open with... then i checked the checkBox that have the label [Always use the selected program to open this kind of file]... The Problem??? All .exe file changed into the wrong program i select it-- so all .exe file opened with this program... My Question?? HOW to get back all .exe file to the regular work..?? and thanks in advance :)

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  • Why sizes are different, and what do they mean?

    - by Ramy
    I have a 1 TB hard drive that consists of one NTFS partition which I use to back up my data (no operating system). The size of all the data in it is : 726 GB, size on disk: 728 GB, and the used space when I check the properties is: 731 GB. There's a 5 GB difference between the size and the used space. Why is that huge difference there? What's the difference between these sizes? (size, size on disk, and used space) Is there a way to calculate the difference, and be sure the HDD is not messing around? Is that normal?

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  • Keeping folder of files in sync over 3 machines

    - by Wizzard
    Morning, Got 3 machines that have user content on them, which I need to keep in sync. This is a 3 way sync. Currently I run rsync but we just don't handle deletes. Have looked at something like gluster, but that seems a little over the top Any other software out there to do a 3 way sync, or a good network file system...? There is for web servers so we don't want a slow / IO hungry process. 3 servers... user content could be added to 1 and needs to be moved to other two.

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  • Strange filesystem behavior, Ubuntu 9

    - by Fixee
    I have two windows open on the same machine (Ubuntu 9, ia32, server). I'll call these windows W1 and W2. W1: $ cd ~/test $ ls sample $ In W2 I run "make" from a parent directory that recreates file test/sample: $ make project . . $ cd test $ ls sample $ Now, returning to W1: $ ls $ cd ../test $ ls sample $ In other words, after I build from another window and the file test/sample is replaced, ls shows the file as missing in the 2nd window until I cd ../test back into the directory whereupon it reappears. I can give more details if required, but just wondering if this is a well-known behavior.

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