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  • Alternative to robocopy /MIR

    - by Robin Day
    We run a number of web apps that store a lot of local data in small xml files. One part of our backup / recovery strategy is to produce a local mirror of the file system via a VPN to the hosting centre. The VPN connection is only via a 12Mbps ADSL and whilst there are a lot of files and directories, the actual number of files that changes is quite small. Although the bandwidth is probably an issue, I'm seeing results such as the output below. The robocopy /MIR took 5 hours to run yet only 30 mins to actually perform the copy. Does anyone have any suggestions as to ways to improve this. The 5 hours is now bordering on too slow and if we can't find a way to speed this up then we're going to have to come up with a completely different solution. Total Copied Skipped Mismatch FAILED Extras Dirs : 17625 6618 11007 0 0 0 Files : 1112430 1223 1111207 0 0 0 Bytes : 57.451 g 192.25 m 57.263 g 0 0 0 Times : 5:01:23 0:35:55 0:00:00 4:25:27 Speed : 93509 Bytes/sec. Speed : 5.350 MegaBytes/min. Ended : Fri Apr 16 05:54:23 2010

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  • directory with 980MB meta data, millions of files, how to delete it? (ext3)

    - by Alexandre
    Hello, So I'm stuck with this directory: drwxrwxrwx 2 dan users 980M 2010-12-22 18:38 sessions2 The directories contents is small - just millions of tiny little files. I want to wipe it from the filesystem but have been unable to. My first try was: find sessions2 -type f -delete and find sessions2 -type f -print0 | xargs -0 rm -f but had to stop because both caused escalating memory usage. At one point it was using 65% of the system's memory. So I thought (no doubt incorrectly), that it had to do with the fact that dir_index was enabled on the system. Perhaps find was trying to read the entire index into memory? So I did this (foolishly): tune2fs -O^dir_index /dev/xxx Alright, so that should do it. Ran the find command above again and... same thing. Crazy memory usage. I hurriedly ran tune2fs -Odir_index /dev/xxx to reenable dir_index, and ran to Server Fault! 2 questions: 1) How do I get rid of this directory on my live system? I don't care how long it takes, as long as it uses little memory and little CPU. By the way, using nice find ... I was able to reduce CPU usage, so my problem right now is only memory usage. 2) I disabled dir_index for about 20 minutes. No doubt new files were written to the filesystem in the meanwhile. I reenabled dir_index. Does that mean the system will not find the files that were written before dir_index was reenabled since their filenames will be missing from the old indexes? If so and I know these new files aren't important, can I maintain the old indexes? If not, how do I rebuild the indexes? Can it be done on a live system? Thanks!

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  • Can I change the file system on the OS partition on Server 2008 R2?

    - by KCotreau
    I have a client using R1Soft Continuous Data Protection backup, and two of the Server 2008 R2 boxes were erroring out with these errors: Unable to obtain NTFS volume data for device '\\?\Volume{f612849e-7125-11e0-8772-806e6f6e6963}': Incorrect function. Unable to discover information for filesytem volume '\\?\Volume{f612849e-7125-11e0-8772-806e6f6e6963}'; Unable to obtain NTFS volume So I backed up all the registry entries with this, {f612849e-7125-11e0-8772-806e6f6e6963}, in it, and deleted them based on some VERY sparse info from R1Soft. I then decided to restore them before I rebooted, and do a system state backup first using MS backup, and even it errored out saying that there were FAT32 partitions. This was a major clue as the only two computers with problems had these FAT32 partitions. I figured if MS backup can't backup something, any other program is likely to have problems. Also, now that I realized the servers had FAT32 partitions on them, the error referencing NTFS takes on more weight. The partitions on both servers have the label "OS", but on one of the computers, it is given a letter, but on the other not. So I am thinking if I just convert the file systems from FAT32 to NTFS, it may solve the backup problem. So the question is this: Can I just convert those partitions, and does anyone have any concrete knowledge of any major downsides, like the servers not coming back up (of course, I would do one at a time)? My thinking is that the answer is probably at least 95% no, but they are production servers, so I wanted to get some second opinions.

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  • Kernel NTFS driver vs NTFS-3G

    - by Jack
    A more comprehensive phrased question since I lost access to the other one. I would ask that the other one be deleted, not this one, as it should not have been migrated in the first place. There are currently two NTFS drivers available for Linux. The NTFS driver included in the kernel, and the userspace NTFS-3G driver that makes use of FUSE. By all accounts, NTFS-3G works perfectly. My question then, is if the NTFS filesystem has been successfully reverse engineered, why have the kernel NTFS team not implemented the changes in their driver? At the moment it is still marked as experimental, and there is a good chance it will destroy your data. Note: This has absolutely nothing to do with distributions...

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  • Ext3 fs: Block bitmap for group 1 not in group (block 0). is fs dead?

    - by ip
    Hi, My company has a server with one big partition with Mysql database and php files. Now this partition seems to be corrupted, as reported from kernel messages when I tried to mount it manually: [329862.817837] EXT3-fs error (device loop1): ext3_check_descriptors: Block bitmap for group 1 not in group (block 0)! [329862.817846] EXT3-fs: group descriptors corrupted! I've tried to recovery it running tools from a PLD livecd. These are the tools I have tested: - e2retrieve - testdisk - photorec - dd_rescue/dd_rhelp - ddrescue - fsck.ext2 - e2salvage without any success. dumpe2fs 1.41.3 (12-Oct-2008) Filesystem volume name: /dev/sda3 Last mounted on: <not available> Filesystem UUID: dd51610b-6de0-4392-a6f3-67160dbc0343 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal filetype sparse_super Default mount options: (none) Filesystem state: not clean with errors Errors behavior: Continue Filesystem OS type: Linux Inode count: 9502720 Block count: 18987570 Reserved block count: 949378 Free blocks: 11555345 Free inodes: 11858398 First block: 0 Block size: 4096 Fragment size: 4096 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 16384 Inode blocks per group: 512 Last mount time: Wed Mar 24 09:31:03 2010 Last write time: Mon Apr 12 11:46:32 2010 Mount count: 10 Maximum mount count: 30 Last checked: Thu Jan 1 01:00:00 1970 Check interval: 0 (<none>) Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 128 Journal inode: 8 Journal backup: inode blocks dumpe2fs: A block group is missing an inode table while reading journal inode There's any other tools I have to test before considering these disk definitely unrecoverable? Many thanks, ip

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  • Troubleshooting transient Windows I/O "The parameter is incorrect." errors

    - by Kevin
    We have a set of .Net 2.0 applications running on Windows 2003 servers which have started experiencing transient "The parameter is incorrect." Windows I/O errors. These errors always happen accessing a file share on a SAN. The fact that this error has happened with multiple applications and multiple servers leads me to believe that this is an infrastructure issue of some sort. The applications all run under the same domain account. When the errors occur they generally will resolve themselves within a few minutes. I can log in to the application server once the error starts occurring and access the file share myself with no problems. I have looked at the Windows event logs and haven't found anything useful. Due to the generic nature of "The parameter is incorrect.", I am looking for additional troubleshooting suggestions for this error. A sample stack trace is below. Note that while this example was during a directory creation operation, when the problem is occurring, this exception is thrown for any file system operations on the share. Exception 1: System.IO.IOException Message: The parameter is incorrect. Method: Void WinIOError(Int32, System.String) Source: mscorlib Stack Trace: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity) at System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity) at System.IO.Directory.CreateDirectory(String path)

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  • Recovery of Windows DFS partion with shadow copy versioned files when overwritten with older modifie

    - by patjbs
    I've noticed the following "bug" on a DFS volume with shadow copies: Pretend you have the following folders/files under shadow copy versioning, going back two weeks. MyDirectory+ MyFile - Modified Date 8/1/2009 The current date: 8/30/2009 You have another version of MyFile stored elsewhere, with a modified date of 7/1/2009. Copy your other version of MyFile into MyDirectory, overwriting the newest version. I expected that you could roll back to the version that was there when it last imaged, say on the prior day and recover your 8/1 version. Not the case. Now, when you go to look at previous versions for the past two weeks, the versioning of that file will be entirely lost, and you'll be stuck with your older 7/1 version. Suckage. Questions: (1) Is this intentional, and if so, what's the rationale? I assume that DFS picks up on the versioning based on the current file, and that's what's wiping out prior versions, but it seems like a fairly stupid/naive way of handling versioning to me. (2) Is there a way to backtrack out of this, without resorting to restoration from other backup mediums? Thanks!

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  • Recover files from corrupt filesystem

    - by Emile 81
    My situation: I have an older 80GB IDE internal hdd, with a few files on that I would like very much to recover: some word documents some latex documents (text files) and pictures (png, jpg, eps files) some other text documents and visual studio project files I had backed them (not the latex ones though) up using svn, but have not committed lately, and would loose a lot of work if I cant recover. the hdd seems to have lost its filesystem, i have no idea how it came about. I know it has/had 3 NTFS partitions, i know the files i want are on the second or third partition. I read http://superuser.com/questions/81877/recover-hard-disk-data Partition Find and Mount did not see all the partitions using intelligent scan TestDisk does (i think), I followed the step by step instructions here, but when I try to list the files it says: "Can't open filesystem, filesystem seems damaged." I'm not sure how to proceed here, as TestDisks wiki does not contain this error message afaik. I don't know if the hdd is gonna fail, or some prog has caused the filesystem to be corrupt, the hdd doesnt make a sound, so i guess that's good. I would like some guidance so I don't accidentally cause more damage. (eg. is it ok to let testdisk write the filesystem to disk? I'm pretty the partitions are listed ok, but not 100%)

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  • Troubleshooting transient Windows I/O "The parameter is incorrect." errors

    - by Kevin
    We have a set of .Net 2.0 applications running on Windows 2003 servers which have started experiencing transient "The parameter is incorrect." Windows I/O errors. These errors always happen accessing a file share on a SAN. The fact that this error has happened with multiple applications and multiple servers leads me to believe that this is an infrastructure issue of some sort. The applications all run under the same domain account. When the errors occur they generally will resolve themselves within a few minutes. I can log in to the application server once the error starts occurring and access the file share myself with no problems. I have looked at the Windows event logs and haven't found anything useful. Due to the generic nature of "The parameter is incorrect.", I am looking for additional troubleshooting suggestions for this error. A sample stack trace is below. Note that while this example was during a directory creation operation, when the problem is occurring, this exception is thrown for any file system operations on the share. Exception 1: System.IO.IOException Message: The parameter is incorrect. Method: Void WinIOError(Int32, System.String) Source: mscorlib Stack Trace: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity) at System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity) at System.IO.Directory.CreateDirectory(String path)

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  • Recovering a VHD after resizing it using VBoxManage

    - by tjrobinson
    I am using VirtualBox 4.1.18 and had a virtual machine running Windows 8 RC with a single VHD, which was initially sized at 25GB (too small!). After installing the OS and some applications I ran out of disk space so shut down the guest and then used this command to resize the VHD to 80GB: C:\Program Files\Oracle\VirtualBox> .\VBoxManage.exe modifyhd "D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vhd" --resize 81920 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% C:\Program Files\Oracle\VirtualBox> .\VBoxManage.exe showhdinfo "D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vhd" UUID: 03fb26e7-d8bb-49b5-8cc2-1dc350750e64 Accessible: yes Logical size: 81920 MBytes Current size on disk: 24954 MBytes Type: normal (base) Storage format: VHD Format variant: dynamic default In use by VMs: Windows 8 RC (UUID: a6e6aa57-2d3a-421b-8042-7aae566e3e0b) Location: D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vhd So far so good. However, when I started the guest up again I got the dreaded: Fatal: No bootable medium found! system halted If I boot into GParted it shows a single 80GB drive as "unallocated". The option to scan for and attempt to repair a filesystem doesn't find anything. I also tried cloning the VHD into a VDI file, just in case that magically fixed it: C:\Program Files\Oracle\VirtualBox> .\VBoxManage.exe clonehd "D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vhd" "D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vdi" --format VDI 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% Clone hard disk created in format 'VDI'. UUID: baf0c2c4-362f-4f6c-846a-37bb1ffc027b C:\Program Files\Oracle\VirtualBox> .\VBoxManage.exe showhdinfo "D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vdi" UUID: baf0c2c4-362f-4f6c-846a-37bb1ffc027b Accessible: yes Logical size: 81920 MBytes Current size on disk: 24798 MBytes Type: normal (base) Storage format: VDI Format variant: dynamic default In use by VMs: Windows 8 RC (UUID: a6e6aa57-2d3a-421b-8042-7aae566e3e0b) Location: D:\VirtualBox VMs\Windows 8 RC\Windows 8 RC.vdi Is there anything else I could try to recover the drive? No, I don't have a backup :( My host OS is Windows 7 64-bit.

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  • Is ext4 ready for a production usage ?

    - by Konstantin
    Hi What do you think about ext4 filesystem in the production enviroment ? We are very close to launching our project that will use tens of millions quite often updated not very big files and we need to decide which FS to use. For a while our considerations about other linux FS are: Ext3 is rock stable, but not very well suited for handling millions small files XFS looks very nice, probably we'll use it ReiserFS ... well...vague future, who will end up fixing bugs ?

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  • Can't Delete Old Windows Directory

    - by David Mullin
    I got a new SSD drive for my computer, and have installed Windows on this drive. This left an old Windows directory on my old normal drive. I am now attempting to delete this old Windows directory, but am getting blocked by security. If I crawl down into each subdirectory, I can manually change the ownership and access rights for each file, but if I attempt to do it from the root directory, I get a "Failed to enumerate objects in the container. Access is denied" error. I have tried logging in as local Administrator, but this had the same effect. I figure that I am missing something stupid, but I just can't determine what it is.

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  • Performance of file operations on thousands of files on NTFS vs HFS, ext3, others

    - by peterjmag
    [Crossposted from my Ask HN post. Feel free to close it if the question's too broad for superuser.] This is something I've been curious about for years, but I've never found any good discussions on the topic. Of course, my Google-fu might just be failing me... I often deal with projects involving thousands of relatively small files. This means that I'm frequently performing operations on all of those files or a large subset of them—copying the project folder elsewhere, deleting a bunch of temporary files, etc. Of all the machines I've worked on over the years, I've noticed that NTFS handles these tasks consistently slower than HFS on a Mac or ext3/ext4 on a Linux box. However, as far as I can tell, the raw throughput isn't actually slower on NTFS (at least not significantly), but the delay between each individual file is just a tiny bit longer. That little delay really adds up for thousands of files. (Side note: From what I've read, this is one of the reasons git is such a pain on Windows, since it relies so heavily on the file system for its object database.) Granted, my evidence is merely anecdotal—I don't currently have any real performance numbers, but it's something that I'd love to test further (perhaps with a Mac dual-booting into Windows). Still, my geekiness insists that someone out there already has. Can anyone explain this, or perhaps point me in the right direction to research it further myself?

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  • What is meant by "streaming data access" in HDFS?

    - by Van Gale
    According to the HDFS Architecture page HDFS was designed for "streaming data access". I'm not sure what that means exactly, but would guess it means an operation like seek is either disabled or has sub-optimal performance. Would this be correct? I'm interested in using HDFS for storing audio/video files that need to be streamed to browser clients. Most of the streams will be start to finish, but some could have a high number of seeks. Maybe there is another file system that could do this better?

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  • cPanel Virtfs won't umount

    - by JPerkSter
    Anyone have any experience with virtfs on cPanel servers? I can't seem to get them to unmount, as they say they are already unmounted: [root@Server ~]# cat /proc/mounts | grep user /dev/root /home/virtfs/user/lib ext3 rw,errors=continue,data=ordered 0 0 /dev/root /home/virtfs/user/opt ext3 rw,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/lib ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/sbin ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/share ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/bin ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/man ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/X11R6 ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/kerberos ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/libexec ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/local/bin ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/local/share ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/local/Zend ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/local/IonCube ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/include ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda3 /home/virtfs/user/usr/local/lib ext3 rw,nodev,errors=continue,data=ordered 0 0 /dev/sda2 /home/virtfs/user/var/spool ext3 rw,nodev,noatime,nodiratime,errors=continue,data=ordered 0 0 /dev/sda2 /home/virtfs/user/var/lib ext3 rw,nodev,noatime,nodiratime,errors=continue,data=ordered 0 0 /dev/sda2 /home/virtfs/user/var/cpanel ext3 rw,nodev,noatime,nodiratime,errors=continue,data=ordered 0 0 /dev/sda2 /home/virtfs/user/var/run ext3 rw,nodev,noatime,nodiratime,errors=continue,data=ordered 0 0 /dev/sda2 /home/virtfs/user/var/log ext3 rw,nodev,noatime,nodiratime,errors=continue,data=ordered 0 0 /dev/sda6 /home/virtfs/user/tmp ext3 rw,nosuid,nodev,noexec,noatime,errors=continue,data=ordered 0 0 /dev/root /home/virtfs/user/bin ext3 rw,errors=continue,data=ordered 0 0 [root@Server ~]# for i in cat /proc/mounts |grep virtfs |grep user |awk '{print$2}'; do umount $i; done umount: /home/virtfs/user/lib: not mounted umount: /home/virtfs/user/opt: not mounted umount: /home/virtfs/user/usr/lib: not mounted umount: /home/virtfs/user/usr/sbin: not mounted umount: /home/virtfs/user/usr/share: not mounted umount: /home/virtfs/user/usr/bin: not mounted umount: /home/virtfs/user/usr/man: not mounted umount: /home/virtfs/user/usr/X11R6: not mounted umount: /home/virtfs/user/usr/kerberos: not mounted umount: /home/virtfs/user/usr/libexec: not mounted umount: /home/virtfs/user/usr/local/bin: not mounted umount: /home/virtfs/user/usr/local/share: not mounted umount: /home/virtfs/user/usr/local/Zend: not mounted umount: /home/virtfs/user/usr/local/IonCube: not mounted umount: /home/virtfs/user/usr/include: not mounted umount: /home/virtfs/user/usr/local/lib: not mounted umount: /home/virtfs/user/var/spool: not mounted umount: /home/virtfs/user/var/lib: not mounted umount: /home/virtfs/user/var/cpanel: not mounted umount: /home/virtfs/user/var/run: not mounted umount: /home/virtfs/user/var/log: not mounted umount: /home/virtfs/user/tmp: not mounted umount: /home/virtfs/user/bin: not mounted umount: /home/virtfs/user/dev: not mounted umount: /home/virtfs/user/proc: not mounted

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  • mac os x - detect file system read

    - by quano
    I want to know what files a specific application is trying to access on my disc. I know that you can use fs_usage, but this outputs events from all applications. I know that you can target a single application, but only one that is already running. I want to detect all readfile-events an application is trying to do, ever since it is started. I don't want to miss out on any event. How do you achieve this?

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  • Does this file format exist?

    - by Jon Chase
    Is there a file format that handles the following use case... I'd like to create a tar file (or whatever - I'm just using tar here b/c it's a well known file format for containing multiple files) that would be usable even if I only had access to specific chunks of said file. For example, say I tar up my mp3 and photo collection into a 100GB tar file, then put the file into some long term storage somewhere. Later, I want to access a specific mp3 file. I don't want to download the entire 100GB tar file just to get to one mp3. In fact, let's say I can't download the entire 100GB tar file. Instead, I'd like to say "give me megabytes 10 through 19 of the 100GB tar file" and then have the mp3 magically extracted from those 10 megabytes. Does a file format like this exist?

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  • How to recover a file using the FAT cluster chain instead of using the stored length in the FAT table?

    - by cadrian
    I'm trying to recover movie files from my TNT receiver hard drive but it corrupts its FAT32 allocation table (crappy cheap device...) Using dosfsck is useless because the correct file length is the cluster length, not the (shorter) one in the table, and dosfsck only proposes to shorten the file, which I won't do. Question: how to recover a file using the FAT cluster chain instead of using the stored length in the FAT table? Edit I forgot to say: Linux solutions only please (I have no windows box)

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  • What are the pitfalls of hardlinked files on my desktop PC?

    - by MountainX
    All the identical-content files on my PC are now hardlinked. (My data is completely de-duplicated. It is a consequence of the way I copied my data from my old computer.) What pitfalls do I need to be aware of now that certain actions on one file could silently affect a number of other files? I know that deleting the file I'm working on is not a problem (assuming I deleted it on purpose). It doesn't affect any of the other hardlinked files and I don't see that the delete action would lead to unexpected side effects. Moving or renaming the file is not a problem. I don't see any unexpected consequences. I don't think copying hardlinked files is a problem, but I'm not as confident about any unexpected consequences in this regard. What I have seen is that making a copy (to the same disk) of a hardlinked file with cp keeps the copy hardlinked (i.e., inode number doesn't change in the copy). Copying to another filesystem obviously breaks the hardlink. (I guess one pitfall is forgetting this fact, given that my PC has 3 hard disks.) Changing permissions does affect all linked files. So far this has proven handy. (I made a large number of the hardlinked files read-only.) None of the operations above seem to produce any major unexpected consequences. However, as was pointed out to me by Daniel Beck in a comment, editing or modifying a file can sometimes be a problem. It depends on the tool and maybe the type of edit. (For example, editing small text files using sed seems to always break the link while using nano doesn't.) This introduces the chance that editing one file could affect all the hardlinked files (i.e., alter the original inode). My proposed solution to this is to make all hardlinked files read-only (and that is already mostly the case). If I can't do that for some files, I will unlink those particular files. Is there any problem with this read-only approach? I'm assuming that if I go to edit a file and find it to be read-only, I'll remember to unlink that filename while making it writable. So one pitfall might be forgetting this rule. In that case, I'll have to rely on my backups. Am I correct in the above statements? And what else do I need to know? BTW, I'm running Kubuntu 12.04. I'm also using btrfs. (I have 2 SSD's and 1 HDD in the PC. I will also be adding an external USB HDD. I'm also connected to a network and I mount some NFS shares. I don't assume any of these last bits are relevant to the question, but I'm adding them just in case.) BTW, since I have more than one drive (with separate file systems), to unlink any file all I have to do is copy it to another drive, then move it back. However, using sed also works (in my testing). Here's my script: sed -i 's/\(.\)/\1/' file1 Surprisingly, this even unlinks zero byte files. In my testing it also appears to work on non-text files without any special options. (But I understand that the --binary option might be needed on Windows, MS-DOS and Cygwin.) However, copying to another disk and moving back may be the best way to unlink. For my use-case, unlink command doesn't really "unlink", rather it "removes".

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  • Can't copy files with 'additional permissions' to ext4 drive -- files that have @ after permissions,

    - by 99miles
    I am copying files from Snow Leopard to a mounted ext4 share via Samba, that's on a Fedora machine. Some files cannot be copied, and give this error: The operation can’t be completed because you don’t have permission to access some of the items. I've noticed that the files that can't be copied have an @ at the end of their permissions whien I do 'ls -l' in the command line. For example, I can copy the second file but not the first: -rwxrwxrwx@ 1 miles staff 1448 May 14 22:55 test.txt -rw-r--r-- 1 miles staff 136 Apr 5 17:06 image.psd.zip From what I've found, the @ means the file has 'additional properties'. Does anyone know how I can resolve this issue so I can copy the files to the fileshare?? Thanks!

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  • Resizing a LUKS encrypted volume

    - by mgorven
    I have a 500GiB ext4 filesystem on top of LUKS on top of an LVM LV. I want to resize the LV to 100GiB. I know how to resize ext4 on top of an LVM LV, but how do I deal with the LUKS volume? mgorven@moab:~% sudo lvdisplay /dev/moab/backup --- Logical volume --- LV Name /dev/moab/backup VG Name moab LV UUID nQ3z1J-Pemd-uTEB-fazN-yEux-nOxP-QQair5 LV Write Access read/write LV Status available # open 1 LV Size 500.00 GiB Current LE 128000 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 2048 Block device 252:3 mgorven@moab:~% sudo cryptsetup status backup /dev/mapper/backup is active and is in use. type: LUKS1 cipher: aes-cbc-essiv:sha256 keysize: 256 bits device: /dev/mapper/moab-backup offset: 3072 sectors size: 1048572928 sectors mode: read/write mgorven@moab:~% sudo tune2fs -l /dev/mapper/backup tune2fs 1.42 (29-Nov-2011) Filesystem volume name: backup Last mounted on: /srv/backup Filesystem UUID: 63877e0e-0549-4c73-8535-b7a81eb363ed Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean with errors Errors behavior: Continue Filesystem OS type: Linux Inode count: 32768000 Block count: 131071616 Reserved block count: 0 Free blocks: 112894078 Free inodes: 32044830 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 992 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 RAID stride: 128 RAID stripe width: 128 Flex block group size: 16 Filesystem created: Sun Mar 11 19:24:53 2012 Last mount time: Sat May 19 13:29:27 2012 Last write time: Fri Jun 1 11:07:22 2012 Mount count: 0 Maximum mount count: 100 Last checked: Fri Jun 1 11:03:50 2012 Check interval: 31104000 (12 months) Next check after: Mon May 27 11:03:50 2013 Lifetime writes: 118 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: 383bcbc5-fde9-4720-b98e-2d6224713ecf Journal backup: inode blocks

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  • Which file system to use for portable hard drive shared among different operating systems?

    - by Jonathon Watney
    Something similar has been asked already but my criteria is a little different. I need to share a portable hard drive (USB/Firewire) between Mac OSX, Linux and Windows XP systems where the files being shared are sometimes 4GB. Is there a file system that is available out of the box on all these operating systems that support this and allows read/write access? If not, what's the next best solution in terms of installing additional software on these operating systems?

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  • Copy File Contiguously to Disk from OSX/Unix/Linux to FAT32 FS?

    - by alharaka
    So the Sysinternals guys have that cool contig.exe utility that allows me ensure a file is contiguous. I need to copy overs ISO files to a FAT32 USB flash key. Grub4DOS requires the files be continuous, but I do not have Windows access at the moment. Is there a way to copy a file so it is contiguous on the target drive, or a tool like the aforementioned that will make an existing file contiguous. Again, I need it on FAT32, and there lies the rub.

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