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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Differences of aufs, unionfs and overlayfs from each other

I have to join two file systems, one read-only (squashfs) and one read-write (ext4). My plan is to mount the read-write filesystem over the read-only flesystem so it appears writable. When I make some ...
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411 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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216 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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26 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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48 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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107 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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26 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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408 views

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

I'm deleting a Python installation folder (12000 files, 256 MB) from a USB flash memory from Windows. It is currently expected to take 40 minutes. Why? I thought it would be enough to change a couple ...
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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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50 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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97 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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36 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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143 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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302 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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426 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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342 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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150 views

OSX network filesystem with local MRU cache?

I don't know if this is possible, but here is the problem I'm looking to solve: My local computer has a 128G hard drive, and I have a network mounted drive containing about 1TB of data Most of the ...
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378 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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443 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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758 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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12 views

Delete files with too long paths

I'm looking for a quick, easy and hopefully automated way to delete files and folders with too long paths / filenames. There are a lot of duplicate answers here on SU, for example: How to delete a ...
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11 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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28 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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16 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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75 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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48 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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54 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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17 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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19 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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100 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 ...
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25 views

What happens to ReFS if I reinstall Windows?

ReFS seems nice. As far as I know, it is some sort of software RAID. If so, the information is managed by the OS. What happens somehow Windows is corrupted and I reinstall Windows? Is all information ...
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24 views

Snapshotting virtual disks mounted in Windows without using vritualization?

I know that you can mount VHDs in Windows, but you can't create snapshots on the go, like in virtual machines. You have to unmount it first, create a differential VHD using Diskpart and mount it ...
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60 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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32 views

ext4 superblock checksum?

I'm reading the ext4 superblock, but its s_checksum (offset 0x3FC) is always zero. Also the s_checksum_type (offset 0x175) field is zero as well, however according to ...
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89 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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472 views

Cheaper alternative to ZFS Storage for a home NAS

I'm looking to build a NAS for home use with 8-10*(2-4TB) drives, out of which 2-3 drives would be used for parity via software RAID. In the past years and up to date, ZFS seems to have become the ...
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68 views

Linux directory becoming a clear plain text file

Did anyone encounter this before? I have a directory called opt which is working previously. Last few days ago, i tried to expand LVM size by using off-line expand. It show success but with some error ...
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29 views

Are Extended Attributes Indexed?

Are desktop search applications like Beagle or Tracker able to index extended attributes like they do with the other file's attributes? If so, that means that a user can define this extended ...
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39 views

Mount UMSDOS in Windows

I have a directory that has --LINUX-.--- files in it, from when it used to be mounted in a Linux system as UMSDOS. Is there a driver that allows for mounting this directory in Windows so I can see ...
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27 views

Linux - How to change default application for text files with custom extensions?

I do some creative writing and use PyRoom for most of my drafts. I want to save my drafts with a custom extension story(i.e. Persuasion.story) and associate story extension to PyRoom. I want to, ...
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369 views

How to repair SD card that was unplugged during formatting?

I tried to format my SD card on my Windows computer but unfortunately I pulled it out during the process. Now it can't be recognized. I tried to wipe it using disk utility on Mac OS X but after it's ...
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50 views

Two files with same path and name - corrupted file system?

My computer is running windows XP 32 bit. I am using the following script to download the contents of a website to my hard drive, which is formatted as NTFS. wget-1.10.2.exe -r -x -p -nc -c -e ...
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210 views

Contiguous physical allocation of a set of files in linux filesystem (ext4)

I have a set of files that I wish to be allocated contiguously in the filesystem. I will be accessing all these files sequentially in a single read one after the other and I want to optimize reading ...
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123 views

What would cause an .exe to vanish without a trace?

I have a few computers. One computer, at home, one day suddenly had its pgbouncer.exe vanish. The antivirus didn't have it in its virus chest [avast]. I couldn't find the bgbouncer anywhere. All the ...
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27 views

What's the purpose of the Linux filesystem checkers' “interactive mode”?

Linux's fsck disk-repair tool often runs in an "interactive mode" by default. This means that, if it finds problems, it may ask me questions. But these questions tend to assume that I am a filesystem ...
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131 views

lvm and df inconsistent on amount of free space due to swap partition in middle?

I recently did a fresh install of Fedora19 over Fedora17 on a system that is dual booted with Win7. Everything is working properly but what really confuses me is that lvm and df are inconsistent with ...
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254 views

Geany cannot save files in Desktop Folder

Since many years, I always used Geany IDE for code of all kind on either Windows or Linux and been very statisfied. But then, I decided to use a more recent version and a strange issue appeared in ...
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175 views

Is it possible to delete unused media from the file system in Django, systematically?

I have a django project in which the admins are able to upload media. As items sell, they are deleted from the site, thus removing their entry in the MySQL database. The images associated with the ...