A file system (or filesystem) is a means to organize data expected to be retained after a program terminates by providing procedures to store, retrieve and update data, as well as manage the available space on the device(s) which contain it.

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Hide drive for unprivileged user

On Windows XP I want to create a new user for browsing only. Thus I want it to have access only to the download Folder. While this can be archived with file privileges easily, I cannot find a way to ...
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1answer
60 views

How does Apache keep clients from traversing the file system?

Since client URI requests to the server are just appended to the document root, what's to keep users from requesting things like, "../../bad_file"?
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4answers
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Clarify something about Linux directory permissions

I'm almost ashamed to admit that there is one thing I am still unsure about when it comes to file permissions. Let's say I have a directory with 750 permission (drwxr.x...). Then I create some ...
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5answers
1k views

ZFS on Linux based systems

Is there anyone who has more experience with ZFS under Linux based systems ? I saw ZFS fuse library, but I don't know it;s worth a test or not. Stable, usable ? Maybe as a storage ? Or only ...
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3answers
2k views

Who is user 6226?

In a Drupal installation on CentOS, there are many folders with the following permission: drwxr-xr-x 8 6226 6226 4096 Jan 7 21:46 cck The user/group 6226 was not created by me. How come ...
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962 views

Debian 6: how to check if I have some limit on max number of files inside a dir?

I know of fat32 being of 65.000 files per dir, what about linux/debian? ext4?
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1answer
162 views

Erratic write patterns with linux md RAID1

I'm experiencing strange write performance patterns on a RAID1 array of SATA disks. My kernel is vanilla 2.6.37 and my server has 32G RAM. I'm copying a 32G file from an XFS filesystem on a SAS drive ...
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2answers
560 views

10tb file storage design question on media website

I have a fairly busy media website where MP3 audio files are uploaded by members and streamed / downloaded from 2 Windows servers which are load balanced at the moment...both servers simply mirror ...
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5answers
1k views

Kernel panic error

We have a dedicated server with software RAID1 and one of the disk failed recently. The disk was replaced but after rebuilding the array and rebooting the server freezes with a Kernel Panic message ...
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1answer
124 views

Setup windows share on Ubuntu Server 10.10

I was wondering if anyone could provide me, or give me a link to a easy to follow step by step guide to setting up a share on Ubuntu Server 10.10. Requirements: Need to share the folder /var/www/ ...
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1answer
2k views

Mount XFS partition with < 4k block size

I have an XFS partition with a 64k blocksize. But I can only mount it in Ubuntu 10.10 when the blocksize is the default of 4k. How can I mount a partition with the larger blocksize? This works: ...
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4answers
6k views

How do you maintain file server integrity without going offline with chkdsk?

I'm just wondering how folks handle ongoing file system stability when using a Windows Server as a file server without taking the system offline to perform chkdsk /f or chkdsk /r? Obviously, one ...
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1answer
205 views

Is it possible to install CentOS with ReiserFS in VPS?

I'm confused because as I know, CentOS doesn't support ReiserFS. But my previous CentOS VPS is running on ReiserFS. Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/vzfs ...
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2answers
329 views

How do cluster file systems avoid race conditions?

How do cluster file systems avoid the myriad of possible race conditions? I'm trying to get a grip on using a cluster file system in a Master-Master architecture. I'm thinking specifically about ...
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1answer
232 views

Execute command on file system events

Hey there, does anyone know how to execute a command whenever a file system change occures within a given directory? I'm running Debian 6.0 and would like to call "make html" when a file/directory was ...
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2answers
3k views

RHEL/CentOS kickstart partition offset

Because of underlying storage, I need the partitions created by the RHEL/CentOS installer to begin on a multiple of 8 sectors. By default the part command during kickstart (see this page for kickstart ...
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2answers
214 views

filesystem on shared host mounted read-only

Lately on a shared host, the filesystem containing my home folder was mounted read-only for 45 minutes to 1 hour. The technical support did not know about the outage, evaded direct questions. After a ...
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1answer
462 views

Monitoring / Tuning File Locks in Windows Server 2008

I'm running an instance of Apache Tomcat (5.5) on a Windows 2008 platform. I think I'm seeing an issue related to concurrent file access / locking. When the number of concurrent HTTP threads is ...
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1answer
898 views

how to make ext4 more reliable? [closed]

As ext4 introduced more reliability than ext3 with block journals, is there any chance to suppose it 100% reliable? What if enabling block journaling on it, which is disabled by default? I have an ...
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6answers
718 views

Do I need a journalling filesystem for both host and guest operating systems when using virtualization? [closed]

Using VirtualBox, I've got a few Linux guests for different distros running on an Ubuntu host. What filesystem layout will give the best performance? Is it worth it to set up a different partition ...
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3answers
1k views

Filesystem/Options for intensive random I/O

I'm planning to (privately) deploy a server that will be hammered with random I/Os in files ranging from 100MB to 50GB. The requests will range from 128 KB to 4MB. The profile will be 50:50 concerning ...
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4answers
599 views

Does ZFS cache Compressed or Uncompressed data in a ZFS file-system with compression turned on?

ZFS supports file-system compression and it also caches frequently or recently accessed data. If a system has lots of CPU but the underlying data storage system is slow. It is possible that ZFS would ...
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5answers
421 views

Backup unix files to filesystem which doesn't allow chgrp/chown etc

I unfortunately have no choice but to backup some files from a ext3 parition on a server to a filesystem which does not allow me to set and edit the normal file attributes (NFS, with all_squash set so ...
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1answer
120 views

Can volumes be guaranteed to mount in the order listed in fstab?

Can volumes be guaranteed to mount in a particular order, or is there a way to set up something along the line of dependencies, where one filesystem must be mounted before another may be mounted? I ...
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1answer
1k views

Recover NTFS filesystem after DISKPART CLEAN

I managed to run the CLEAN command in DISKPART on the wrong disk (disk 1 instead of disk 3 in LIST DISK). Now it shows up as a "Healthy (Primary Partition)". If I assign a drive letter to the ...
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1answer
1k views

What is the best file system (used by an Amazon EBS volume) for a lucene index?

I want to create an ebs volume (Amazon EC2 cloud computing) to store my lucene index. What is the best file system to use (when using the command mkfs -t ?) ? I know xfs is often used for mysql but ...
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4answers
2k views

where are kvm-snapshots stored?

I run several VM's on KVM/ubuntu, which all get started with the -snapshot parameter (the VM's only compute several things which can be destroyed after reboot). Out of the docs I've read, the changes ...
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2answers
3k views

Ext4 partition bigger than 2TB?

Is there a way to make partition bigger than 2 TB on ext4 file system ?? Im trying to do that on debian but get message Partition size can not exceed 2TB ...
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3answers
2k views

Which filesystem for 16TB under CentOS 5.5?

We have a PowerVault NX3100 from Dell here. I have to install a Linux Server on this system and don't know which filesystem I should use and which partition layout would be useable for the RAID with ...
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2answers
181 views

Cannot access directory in Windows 7 x64

I'm backing up IIS7 configuration with the appcmd utility. The backup goes on well, and the folder with the backup's name is created in %windir%\system32\inetsrv\backup as expected. However, although ...
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4answers
30k views

kjournald reasons for high usage

I'm trying to figure out why is kjournald going crazy on my machine. It's an 8-core box with loads of memory. It's got ~50% cpu load. The iotop doesn't seem to point at any specific processes - some ...
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1answer
179 views

Small Business File Server With 5 Remote Offices

I have 5 offices 2 having 10 employees each and the other 3 having 2 each. Each of my offices will be connected to each other with fortinet products (within the month). I want files to be locked ...
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2answers
78 views

Strange filesystem behavior, Ubuntu 9

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 ...
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3answers
1k views

Linux's best filesystem to work with 10000's of files without overloading the system I/O

It is known that certain AMD64 Linuxes are subject of being unresponsive under heavy disk I/O (see Gentoo forums: AMD64 system slow/unresponsive during disk access (Part 2)), unfortunately have such ...
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3answers
3k views

Linux - Best file system for /var/log partition? [closed]

I am under Debian Squeeze 6.0. What is the best file system for the /var/log partition, and why ?
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2answers
136 views

Is there a problem with having massive amounts of self-mounts?

I have a configuration in which I want to use a huge amount (1000-10000) of self mounts (mount --bind). My filesystem is ext4 in RAID 1 with two 400GB HDDs. Basically, what I am trying to do is ...
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7answers
57k views

df in linux not showing correct free space after file removal

I have file servers which are used to store files. Files might reside there for a week, or for a year. Unfortunately, when I remove files from the server, df command doesnt reflect the freed up space, ...
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2answers
606 views

CentOS 5.5 installation on disk image

Today, in order to install CentOS 5.5 I'm using kickstart script. I would like to install CentOS on different way: Create disk image (using dd command) Create filesystem on this disk image using ...
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3answers
2k views

On linux, what does it mean when a directory has size 0 instead of 4096?

Here's a strange thing I haven't seen before -- a directory whose size is reported by ls as 0 instead of 4096, and I can't create any files within it. # ls -ld lib home drwxr-xr-x. 2 root root 0 ...
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1answer
915 views

25TiB for /home from 16TiB, what to do with ext3?

I have recently lvextend my logical volume (where /home is) from 16TiB to 25TiB. However, when I try to run extend2fs on my /dev/vtrak/home, it complains that resize2fs 1.41.12 (17-May-2010) ...
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1answer
572 views

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

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 ...
3
votes
1answer
426 views

zfs-fuse in Ubuntu - ARC cache?

I just set up a file server running Maverick, and created a mirrored zpool of 2 2TB drives. In my prior experience with ZFS, it will use all available memory to cache from the drives... but now I'm ...
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6answers
2k views

What's the fastest filesystem for developer builds?

I'm putting together a Linux box that will act as a continuous integration build server; we'll mostly build Java stuff, but I think this question applies to any compiled language. What filesystem and ...
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4answers
287 views

how to identify file system running on a partition

I am not very clear with identifying the partition type or filesystem residing on it here is what lvscan reports me ACTIVE '/dev/virtualization/vm1' [100.00 GiB] inherit ACTIVE ...
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1answer
43 views

ntfs general Question

Hey, One week ago I got my Macbook Air [it is wonderful :-)] and as I desired, I installed (using Bootcamp) Windows in addition. I am happy as it works fine and very sweet is that I can access the ...
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3answers
1k views

What is the best filesystem for backing up on external hard drive?

I have a 1TB consumer grade NAS and I can use whatever file system I please on it. I only plan to ever use it with linux based systems, so windows compatibility is not really a priority. What is the ...
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3answers
839 views

linux file system allowing check while in use?

Is there a file system for linux where it's possible (and safe) to perform a file system check while it's mounted read write or which does not need to be checked periodically ? E.g. a file system ...
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1answer
369 views

fault tolerant file systems

some filesystems like btrfs and lustre are marked as fault tolerant file systems in : wiki:http://en.wikipedia.org/wiki/List_of_file_systems what's meaning of fault tolerant file system at all? does ...
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3answers
5k views

Native SMB/CIFS through ZFS or Samba Instead

I was totally unaware of native SMB/CIFS on ZFS. This wiki doc does not mention performance differences. What kind of performance differences exist between the two?
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2k views

What is the best filesystem for VMware Server on linux host?

Unfortunately I'm still dealing these days with the deployment of VMware Server 2.0.2 hosted on Ubuntu Linux 10.04 LTS. Internal testing has shown big problems when running on a 64bit host but ...