A file system is the specification of how files in a computer should be stored, named and organized. This tag should be used for generic file system questions. For specific file system questions (FAT, NTFS, ext4, ...) use the appropriate tag instead.

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Why does it take so long time to permanently delete files from a USB drive?

I'm deleting a Python installation folder (12000 files, 256 MB) from a USB flash drive, using Windows. It is currently expected to take 40 minutes. Why? I thought it would be enough to change a ...
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540 views

Is it safe to resize a BTRFS partition that is part of a multi-device volume?

I have a multi-device BTRFS volume and I would like to re-size one of the partitions. To be more precise: My /home is spread across two separate BTRFS partitions. I shrunk down another partition to ...
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225 views

How do I determine what file occupies a given sector in Mac OS X?

There are similar questions for Windows and Linux, but I need this on OS X. The filesystem is HFS+, journaled. I have a sector LBA, I could find where a partition starts with gpt (though it refuses to ...
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30 views

sdcard performance bottleneck

I have loaded my 4 GB FAT32 sdcard almost entirely with mp3 files. Now, I cannot remove none of them because "discovering items" never ends. Even command line tools last forever, including format e:. ...
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55 views

Virtual filesystem on linux to translate contents (fuse?)

Is there some existing software to use a virtual filesystem to translate file contents? (read-only or read-write). It would be interesting to be able to generate a view on a code-base, for example. ...
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159 views

My directory has become recursive. How can I remove it?

The directory structure of one of my folders has become recursive or something, making an almost endless loop until I cannot go further down: ...
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97 views

Userspace manipulation of partition and disk images

On a Linux system, is it possible to use only user-space tools to create and manipulate partition images (which will probably only have ext2 filesystems on them) and then take those partition images ...
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27 views

Speedier File Access in Window Manager/File Explorer when File Names have Similar Starts

I was wondering both from a Windows [7] and a GNU-Linux system set-up perspective: When you are opening files in the File Explorer/Window Manager and you type in the first letters in the file's name ...
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145 views

Linux LUKS and choice of filesystem

Which filesystem displays the best performance when running on a LUKS encrypted partition? Does it make sense to use f2fs when the LUKS partition is on an SSD, or does the device-mapper abstraction ...
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1k views

USB disk not auto-mounting in Ubuntu 12.04

It used to, but suddenly now it doesn't. The device shows up in the following: dmesg | tail -1 [394191.758315] usb 2-1.3: new high-speed USB device number 9 using ehci_hcd ...which I know is the ...
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166 views

Which network file systems do not implement locking correctly?

As a common cause for file corruption, documentation often cites as cause "NFS that doesn't implement file-level locking correctly" or something similar, e.g., for SQLite: How to corrupt an SQLite ...
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59 views

How to recursively restore older folder version in Windows 7?

While working on the computer (Windows 7 - HP Laptop), I tried to move a large folder and the system/operation froze. I tried to kill the process from the task manager, then restarted the computer. ...
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119 views

How are ties broken in AuFS with the top-down-parent file creation policy?

The AuFS manual says: Policies for Creating create=tdp | top−down−parent Selects the highest writable branch where the parent dir exists. If the parent dir does not exist on a writable branch, ...
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42 views

Is it possible to create an instance of windows that has the limited amount of files needed to run

I have been experimenting with virtual machines and I am trying to figure out if their is a way to create a limited instance of Windows from your own version you are running? An example would be that ...
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148 views

Sharing storage on Linux and Solaris

I'm looking for a solution in order to share a san mounted volume between several hosts running on Linux (RHEL) and/or Solaris (Sparc). Note that I basically need to share a set of directories ...
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322 views

Folder doesn't show up in explorer, cmd, and python even though I can access it, how can I fix this?

I am accessing another computer on the network using a mapped network drive. The path looks like \\192.168.0.100\d$ which is mapped to my computer's "m" drive. I can access, view, create, delete, ...
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512 views

force upperdir overlayfs to re reread/reload lowerdir

am having the following problem with an overlayfs: I can mount an overlayfs fine using the following line in my etc/fstab none /home/student overlayfs ...
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377 views

Does a smaller cluster size increase the ratio of NTFS compression?

I read that NTFS compression needs a partition formatted with an allocation unit size <= 4KB. Could a smaller cluster size of a partition give more compression and lessen wasted space? For ...
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403 views

How to confirm sector error on a video DVD

If a DVD skips at around 21:00 mark is there anyway to relate that to kernel messages?I would like to know if the DVD format is standard enough that I could compare the time the movie skips with the ...
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1k views

NFS client (SFU in Windows 7) creates folders with 'x' bits set to false

I have a drive mounted on a Windows 7 64-bit machine from a VirtualBox Ubuntu VM via NFS. Whenever I try creating a folder from Windows, the folder is created with its executable bit set to false, ...
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477 views

Windows 7 created a Encrypting File System key for me. How can I tell if it's in use?

I never knowingly created an encrypted file system, or encrypted files. This similar question proposes that it might have been Office 2010, which is a possibility. (Though it's irritating that some ...
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847 views

Unionfs-fuse wont map directory onto itself

So I tried to union two directories together and failed. Here is a transcript of what I tried, and based on tutorials and information I've seen from googling around, I'm pretty sure this should work. ...
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70 views

How can I find out what's on a certain block in an HFS+ formatted drive?

I've a hard disk that has damaged blocks. I'm now copying it using ddrescue to an external drive. I've a file with the list of the damaged blocks, how can I find out which files are located in the ...
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21 views

Cannot remove file from Linux filesystem

I have this file and I cannot get it removed from the filesystem: [root@ad Windows10]# ls -las total 16 8 drwxrwx---+ 2 root root 4096 Jul 30 10:19 . 8 drwxrwx---+ 12 3000024 users 4096 Jul 30 ...
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union-mount file system that actually deletes from all layers

Here's my use-case: I have roughly a dozen machines loosely clustered together, each with a few hundred GB partition that's currently not used. I would like to make a scratch partition so that users ...
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Issue: Guest OS (Debian 3.0, 32-bit ) loads with read-only file system immediately upon booting in VMware Workstation 10 (Host OS: Windows 7, 32-bit)

Issue Summary: A guest 32-bit Debian 3.0 virtual machine is opened using VMware. The guest OS loads a read-only file system on startup. Despite root access no file changes can be made to the virtual ...
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54 views

Force check all file systems in Ubuntu

How to force check all file systems under Linux/Ubuntu? My newly installed Ubuntu 15.04 Vivid stops booting after the suspend/resume failed. Is there any easy way to force check all the file systems ...
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Add new partition to CentOS file system

I use a CentOS virtual machine on VMWare Workstation. I recently tried to increase the system hard disk memory for CentOS by tweaking the VM settings on VMWare Workstation. After that, I tried to ...
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40 views

BTRFS size on disk 200x larger than actual size

Why is BTRFS so grossly misquoting the size of small files on my filesystem? [pi@rpi scipy]% cat __init__.py | wc -c # literal byte count 4729 [pi@rpi scipy]% du --apparent-size -h ...
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30 views

rsync glitches with -X (extended attributes) flag

When I rsync files from ext4 file system to btrfs with the following set of flags: rsync --update -DHAXErlptgo the first copy of the backaped directory is done OK, but when this same command is ...
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43 views

USB thumbdrive reported speed difference between NTFS and FAT32

I found this rather strange. I have a USB 3.0 thumdrive (ADATA UV128/16GB), which when formatted as NTFS, seems to report a much higher writing speed than when formatted as FAT32. For example, I ...
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54 views

Windows detects all flash drive file systems as RAW

My computer that's running Windows 7 detects all flash drive file systems as RAW, and thus shows an error message to format them as soon as they're plugged in. I tested all the flash drives in other ...
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35 views

Is copying files between two different file systems slower than between the same file systems?

I was wondering if copying files between different file systems (for example from ext4 to ntfs) is slower than copying to the same file system (from ext4 to ext 4). I also would like to know how does ...
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36 views

Implementing folder “hardlinks” on NTFS

So if you rename a folder target, and lets say you have a bunch of junctions pointing to it, those junctions break. Hardlinks remedy this problem with files, but folders cannot be hardlinked. I hear ...
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How to continue the autofill in this format?

So right now I have this in range A1:A9 A1: 1.1.1 A2: 1.1.2 A3: Empty cell A4: 1.2.1 A:5 1.2.2 A6: Empty cell A7: 1.3.1 A8: 1.3.2 A9: Empty cell What I need to do is be able to drag this ...
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Which devices in /sys/block are HDDs?

I'm interested which devices in /sys/block are real HDD drives: [root@sdp1a block]# pwd /sys/block [root@sdp1a block]# ls dm-0 dm-12 dm-3 dm-7 loop1 loop5 ram1 ram13 ram3 ram7 sdaa sdae ...
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28 views

ack.pl tool and ack.pl flags + how to ignore files with S attr

I am using the ack.pl tool in order to search string or IP’s in files The official site of ack.pl is - http://beyondgrep.com/documentation/ Example of ack.pl CLI ( want to find the string ...
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27 views

How do I tune NTFS for subversion

I'm building a new buildhost for Jenkins that will run Windows 12 Server and check out relatively large c-projects from SVN and build them. I our current generation of builders a bottleneck is the ...
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63 views

How to defragment or minimize a “directory file” on ext4?

I have quite an old home directory on HDD. There were lots of files created and removed and now the size of /home/username is 995328 bytes. Please note, I mean the size of the "directory file" (every ...
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99 views

SSD seems to be read-only, nothing can be written to it (linux ext4 filesystem)

After two week of normal use my new SSD began to work strange. Now it seems that no file is written to it. An example: root@hooker3:~# mount |grep ssdhome /dev/sda3 on /ssdhome type ext4 ...
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17 views

How do I use chunkfs?

I have the same question basically as ( Mountable filesystem that automatically splits files ) and one of the answers(http://superuser.com/a/735013/390402) suggests using ChunkFS but for the life of ...
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41 views

can filling up a disk and then freeing up space cause filesystem problems a month later?

I had an incident happen not too long ago with a server running mysql. Someone had enabled slow query logging on the server but never bothered to implement a log rotation, so the log files slowly ...
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25 views

OSX “._” prefixed file names

when i name a file with prefix "._" it just disappear, altrought, other "." beginning files are still visible what are "._" and how can i see them in finder? Note: i did enable to see files ...
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173 views

Circumvent limitations of CIFS/Samba

My situation: I have a NAS which serves shares via CIFS/Samba. Internally, it uses an ext3 filesystem, but this is not relevant (I think). I have some Linux computers (using ext4 filesystems) which I ...
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60 views

Which filesystem to choose in sparse files?

I have the problem, that I want to save backups to a NAS. Unfortunately the NAS is only avalable as CIFS network share (plus root SSH access). I do not want to modify anything in the configuration ...
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95 views

Rsync doesn't allow me copy files into mounted filesystems

I configured rsyncd.conf for public access in my rpi: log file = /var/log/rsyncd.log timeout = 600 max connections = 20 uid = nobody gid = nogroup read only = yes list = yes [public] path = ...
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21 views

File system tracker

As everybody I have gigabytes of critical files storing on my NAS which is syncing with online storage. But sync conflicts or just hard drive errors can break my solid storage system. I'd like to ...
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21 views

Backup a big file with binary diff

Edited here is my problem: I have a file A (10GB) and a file B (10GB). File A and B are slightly different (diff is around 500MB). I want to the file A to be exactly as B as fast as possible. One ...
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89 views

An inaccessible folder with a random name has appeared in my ~/Pictures folder

Today I noticed a folder within my Pictures folder, that I did not create, and can't access even with root privileges, it is named "3TNksAEHqX" and I can't use ls on it, though I can stat it, as seen ...
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161 views

Ext4 allocation pattern with random writes in sparse file

If I create a large (a few GB) sparse file in ext4, and then write randomly throughout the length until all 4k blocks have been "touched", in the absence of other heavy write load, can I expect that ...