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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635 views

Is there any way to fix a corrupted LDM database?

TL;DR: Are there any tools/approaches to diagnosing and fixing LDM (Logical Disk Manager) metadata structures without recreating from scratch? Full description: I have two SSD drives ...
3
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29 views

what exactly does fsck do under the covers (for UFS)?

If a computer crashes then the filesystem is an inconsistent state. What exactly is fsck(8) doing to restore to a usable filesystem? Is there a backup table? Is it cross-checking metadata? ...
3
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140 views

Choice of distributed filesystem for intensive reads and writes

I have a series of servers (HP ProLiant, 34 servers) each of which with 500 G of hard drive space. These servers are part of a computational cluster which runs processes that roughly fall into two ...
3
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1answer
125 views

S3 based file system capable of requesting only part of file

I'm storing large datasets in s3, but on a given computer in my cluster, my program only needs to read a small subset of the data. I first tried s3fs, but it downlooads the entire file first, which ...
2
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1answer
39 views

Filesystem on a block device that now has another name?

Here's the scenario: I'm attaching a disk to a KVM guest VM, lets say 'vdb' Now I create a partition on 'vdb' and format it as ext4 (vdb1) I mount 'vdb1' and write some data I unmount the 'vdb1' I ...
2
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1answer
46 views

Using Volume Shadow Copy to Identify Updated Files

I have folders in my server with over 60GBs of data across ~160,000+ files. The files in this folder change regularly. I need to be able to make a backup copy of the files in this folder at a given ...
2
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1answer
90 views

IIS 7 - Windows Server 2008 combine to make file locked, causing IIS to overload

I have this issue where approximately once a year, one of my images in my asp.net web app becomes locked. By locked I mean you can't read/write/delete it, and if you try to, your remote machine ...
2
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1answer
209 views

How can I repair dir total-size with gluster self-heal

I build a glusterfs cluster, and the type is the Striped Replicated Volumes with 4 servers like that: Volume Name: test-volume Type: Striped-Replicate Volume ID: bdb596e6-a7d2-44a4-8791-1b4fdc57469c ...
2
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1answer
67 views

Does exists a tool for monitoring which files changes?

does exists a tool to monitor how many, and which files are changed day by day ? I would like to 'monitor' how many Mbyte /Gbyte of data changes in my company file server day by day for a 'remote' ...
2
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1answer
114 views

Better folder structure for 1-6mil files?

I'm doing a bit of development work for a start up, and have been asked to work on the directory structure for all the content being served and the scalability of the host servers(load balancing, ...
2
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1answer
562 views

Recommended technology for layered disk cache in linux

I originally asked this on superuser but it occurs to me it's more more of a server topic. I've just bought a 6-core Phenom with 16G of RAM. I use it primarily for compiling and video encoding (and ...
2
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1answer
302 views

Performance of Loopback Filesystems

Has anyone done any performance/benchmarking tests on Linux loopback file systems? What has your experience been so far. Is there any serious degradation in performance? How about robustness? ...
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1answer
61 views

Mount a iscsi target volume natively

I have a LVM logic volumn exported though iscsi and formatted by the client to ext4. Now that machine serving the iscsi target went down and I'm wondering if I can just take the hard disk out to ...
1
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1answer
341 views

DRBD keeps crashing over saturated link

Under high I/O DRBD will crash and take server down; is there anyway to optimize DRBD to prevent from happening again. listed below is my current config, errors and specs. if you need any more ...
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1answer
259 views

BackupExec 2012 File System Archiving - Access is denied to Remote Agent

Gentlemen, I've been struggling with a Trial version of Symantec Backup Exec 2012 for about a week now. It was installed as an upgrade to our 12.5 license, and the setup completed with no issues. ...
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1answer
55 views

Speeding up directory creation / file linking

I'm using rsnapshot for backups. Currently that means every time an update runs (even without any data difference) I get a copy of ~100M of only the directory structure + inode list. The files are ...
1
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1answer
616 views

Create variable sized RAM-backed file systems (Ext4 and Btrfs)

For benchmarking purposes I need to format and mount variable sized ram-backed block devices with Ext4 and Btrfs. Unfortunately the only solution I have come across uses ramdisks which seem to be ...
1
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1answer
473 views

Iozone record sizes and real-life purpose

I am puzzled about Iozone record sizes. My questions are: how to find out what record size my application uses?; what is the correlation between Iozone record size and the filesystem Block Size?; ...
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1answer
318 views

ASP.NET, reaching the limits of DFSR, and file storage sharding

We run a popular web app, and our backend file storage exists on a file server, replicated to another file server for failover with DFSR. We are reaching the theoretical limits of DFSR, and therefore ...
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1answer
198 views

Linux RAMDisk filesystem with blocking writes when filesystem is full

I need to set up a Linux RAMDisk to implement a queue. The basic idea is there will be processes writing to the RAMDisk. At the same time there are processes that watch for new files and read and ...
1
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1answer
489 views

GlusterFS as elastic file storage?

Is there any way to run GlusterFS in a replicated mode, but with the ability to dynamically scale the volume up and down? Say you have 3 servers all running glusterd. your Gluster volume would have ...
1
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1answer
160 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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1answer
590 views

Why does this loopback device creation malfunction?

The stackoverflow people thought this was more appropriate here, I put it there as it is part of a program but I can see their POV, so here it is: At the bottom of the code you can see it failing. In ...
0
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1answer
6 views

File attributes on a NAS Drive not reporting user information

We have a Synology NAS drive attached to a server 2012 network, but the file attributes do not report who last modified any of the files? Does the NAS need to be reconfigured or is it a configuration ...
0
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1answer
41 views

Moving cpanel location from /usr/local to /home

My /usr partition is almost full, and it seems that the most practical option is to move the largest directory /usr/local/cpanel which is almost 4GB, to /home. Something like: Create link to new ...
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1answer
23 views

Can I repair a file system with fscheck while it's mounted?

On a openvz hostnode some vps didn't shut down properly. There is no separate partition for /vz, they run in root. When restarting a vps OR copying a big file vz-dump (ca. 28GB) from one folder to ...
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1answer
16 views

Process being kept open “some where”

I've got an instance of the following error. The file is an outlook .pst file the has become corrupt, I'd like to move the file to another location and run the inbox repair tool. I have shut down ...
0
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1answer
36 views

Long delays in local server folder acess - Server 2003

I have a 2003 server which is acting as file server, with a 2-disk 1 TB RAID-1 (software RAID, unfortunately). This has been working fine. Recently it occured that from time to time, when trying to ...
0
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1answer
30 views

Determine filesystem type without partition table

I have an old 16GB SCSI hard drive with some important files I'd like to backup. The problem is cfdisk doesn't recognize the hard drive, it says the partition table is zero. Another problem is, I ...
0
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1answer
78 views

Fedora install in Virtualbox expands to fill drive

I recently completed a Fedora 19 install on an 8GB virtual drive in VirtualBox. For some reason though, it appears as though I have run out of space! Surely my 951MB Fedora .iso can't have expanded ...
0
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1answer
150 views

PXE server - ubuntu setting username/password later - is it possible?

so I am writing a program in mainly C/C++, though I think this question fits under server fault as it is related to the Linux distro Ubuntu. So what I am looking for is a way (possibly hackerish-way) ...
0
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1answer
66 views

Final move of data after synchronising folders

I am migrating six terabytes of data from legacy systems to new. The legacy data is stored in file vault application which retrieves files very slowly. Because of this it took six weeks to copy the ...
0
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1answer
854 views

No posix acl in debian Wheezy with ext4

I was running a new script and encountered the following error: Your filesystem or build does not support posix ACLs So I thought no problem, just add acl,user_xattr to my fstab. It now looks ...
0
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1answer
71 views

Mounting ISO9660 File System in Windows 2008

I am booting Windows 2008 instances in an OpenStack environment. OpenStack can use a "config drive" to pass metadata information to the instances. This drive is formatted as a ISO9660 (or optionally ...
0
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1answer
97 views

Open File dialog shows a renamed folder

I recently renamed a directory in the "My Pictures" folder from "ghostAlbum" to "imageAlbum" Explorer shows what I would expect (the new folder) as does the command line "dir" command. Excel's and ...
0
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1answer
151 views

Is it possible to redirect network traffic between a host and a guest VM that share a NIC?

I have a CentOS 6.3 machine running several guest CentOS 6.2 VMs. I would have liked to setup a filesystem passthrough between the guest and the host but it seems that this functionality is not ...
0
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1answer
142 views

strange usb file system corruption

We have a few X7DBT Supermicro motherboards that is using a Kingston DataTraveler 102 USB Flash Drive as a boot drive. The customer had 10 systems and they say that the site had a power failure. Once ...
0
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1answer
28 views

SQL Server plus small files

I have a MSSQL server, 3 volumes, that runs some processes that seem to take way too long. One of these processes reads in a zip file, then writes to a database based on what's in the zip file.... for ...
0
votes
1answer
614 views

What cause high CPU usage on the server during file upload

When I try to upload a huge file size (approx 2GB), the server cpu usage goes really high. What should I do to fix this? I just use standard html form and php, for file upload. I'm sorry if I post ...
0
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1answer
610 views

PureFTPd - is it possible to limit file access for virtual users?

I have a website for a little group of people, where each of them can login using their username and password. Since we'd like to share some files, I am looking for a FTP server, which would allow ...
0
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1answer
391 views

Does uwsgi workers share a common memory ? [ With Nginx ]

I have configured my Nginx with Django uwsgi. When the django server starts, it reads a 5MB file from the hard-disk. Now, Without Nginx with Django default server python manage.py runserver => Runs ...
0
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1answer
330 views

No init found. Try passing init= bootarg. ( linux fedora 14 - rackspace )

I have a server on Rackspace. It was working just fine. But this morning I found that it wasn't working, after a hard reboot (suggested by a rackspace chat support guy). I found that it was giving ...
0
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1answer
318 views

/dev/root not found at the time of booting Cent OS 5.7

Initially I got the error /dev/root not found while booting Cent OS 5.7. I knew the issue at it was because of wrong entry in /etc/fstab which was /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 Here ...
0
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1answer
191 views

IIS 7, ASP.NET security nightmares

For no apparent reason that I know of, my ASP.NET website on my local development server (IIS 7) started returning Error Code 500 - Internal server error. After granting the user "Users ...
0
votes
1answer
502 views

ext2 file system and Solaris 10

I have Solaris 10 installed on computer and I have USB flash drive with ext2fs partition. I want to mount flash drive and do this: 1) Download FSWpart and FSWfsmisc packages 2) Install: root~#gzcat ...
0
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1answer
350 views

File corruption issue AIX jFS2

I have an application which is doing a lot of file operations.Its doing a lots of file read and write operations(lot of small files). We have found that some of the files are getting mixed up ...
0
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1answer
71 views

Managing a large amount of folders & files (Digital asset)

I have a large heap of files containing photographs, some documents of info about the same photo , a few .psd files, a few .tiff files, all related to the same photograph or information. I want some ...
0
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1answer
143 views

How do I export my web-host's (VPS) filesystem to an image to load locally in a VM?

I'm a dev new to sysadmin, armed with root access to a linux box. I want to practice a bit on the configuration in a local virtual machine. What setup would I need to do this? My current idea is: ...
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13 views

Vista filesystem woes

I have a program that reads settings from a settings file in C:\Users\MyUser\AppData\Roaming\MyFolder\program.settings Then I deleted the settings file, but the program still can read it although its ...
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45 views

If two directory copy processes are run simultaneously, will the respective directories be stored in contiguous blocks or interleaved?

Assuming that there is ample free space on the device, and it isn't fragmented. I'm interested in answers for various operating and file systems.