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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13 views

how can i migrate a squashfs filesystem to another read/write filesystem? [on hold]

well, basically what i want to do is copy all of my router's files (even the dev file (because i'm running busybox)) to my usb flash drive and let my router by default boot from the usb device. it ...
0
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1answer
32 views

Fiberchannel disk Centos6.5

I got some fiberchannel disk shelves including several 300Gb SCSI drives and a HP c7000 blade system with multiple blades in it. As there is no storage controller (filer) available i have to do it ...
3
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1answer
29 views

Read only permissions still allows to save

I have a weird permissions situation that I can not explain. Let me explain my users and group and then show you the folder permissions. drwxrwsr-x. 2 jenkinsuser applog 4096 Jul 15 09:56 . ...
0
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0answers
34 views

Best Practices / Setup for a File Sharing Website in a clustered environment [closed]

We are planing on a file sharing website project with A main webserver (dedicated linux running on nginx) Multiple file servers distributed in various data centers around the world (dedicated ...
2
votes
1answer
70 views

Arranging a raidz3 ZFS vdev to tolerate entire JBOD failures?

Let's say I'm going to build a very large 1PB zpool. I'll have a head unit with the HBAs inside of it (maybe 4 port LSI SAS cards) and I will have perhaps 7 45-drive JBODs attached to the head unit. ...
1
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1answer
55 views

How can I place /tmp, /var, /opt, and /usr/local into a /data partition instead of the / partition?

I want to partition a CentOS 6.5 server that has 4 RAID VDs: sdb - 102398 (100GB) sdc - 2185727 (2TB) sdd - 11440639 (11TB) sde - 11440639 (11TB) So that I can have the majority of the disk space ...
0
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0answers
20 views

zfs checksum verfication failed, solaris booting failed

Looks like my solaris 10 got hosed overnight for unknown reason. I get below error while booting and also when trying to cat menu.lst file in grub. Hard disk is being detected by ubuntu so it may not ...
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0answers
27 views

deciding the filesystem to store mysql database [duplicate]

I have an EBS attached to my EC2 ubuntu instance. It's running smoothly and i am using it to store the static files for my websites like images, zip etc. Now i just realized i need to also get my ...
0
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1answer
8 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
30 views

Deleted File, Available Space Did Not Return [duplicate]

On CentOS linux, I just deleted a large log file over 3gb on XFS file system. After deleting the file, the available file space did not return to the drive seen via df -h. Is there anything I can do ...
1
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1answer
46 views

Remount root RW without reboot

Today I did something stupid on production xen vm server. I mounted the external device mapper as read only to make a copy of the filesystem. This process went well but then the rootfs / become ...
4
votes
1answer
258 views

Should I exclude all 'dev/' or only 'dev/pts/' during full server tar backup?

I'm curious why in all backup tutorials I found tar command excludes among others /dev/pts and not all of /dev/ Why would I want to backup anything under dev?
2
votes
1answer
94 views

How to get best performance: storage cache server (small files) with for 4 disks (3TB's)?

We're preparing a cache storage server for some small files that will be cached for a few days (so HDD will have more reading then writing). All files are rather small around 100 to 500KB a file, but ...
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votes
1answer
22 views

Separate io input/output in linux [closed]

My question is really short. Sometimes we have to separate i/o from a machine for example case of remote file system ? Why we do that ?
0
votes
1answer
21 views

Does fsfreeze flush FS caches?

If I run fsfreeze on a mounted filesystem, it will not be possible to perform new "write" operations on that FS until it is unfrozen, and "ongoing" writes should "complete". Now, will fsfreeze also ...
1
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1answer
35 views

How to sync SVN repository with a remote FTP filesystem

I configured a Centos server locally(in-office) which contains a SVN repository with a project. Many developers are working on this repository and making changes. Also I have a remote server which ...
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votes
2answers
51 views

Server Disk Space Calculation - Errors No such file or directory [closed]

When i do a du -h --max-depth=1 in my server i get following errors coming up, du: cannot access `./proc/13379/task/13379/fd/4': No such file or directory du: cannot access ...
0
votes
1answer
32 views

Copying files with tilde has odd behaviour

It's pretty simple to replicate. Create a folder with file "ABC123~1.txt" Create a folder with file "ABC 123.txt" Try to copy the file from the first folder to the second... windows asks if you ...
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2answers
26 views

Deleting file in tar mounted with archivemount?

archivemount allows rw-mounting tar archives. What happens when I delete a file? Is it actually removed from the tar archive? Is a delete flag set? If the file is actually removed, then I assume the ...
1
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2answers
75 views

ext3/ext4 physical block size view

I'm using a suse 11 server with xfs and using "xfs_info /srv" command i seen this. xfs_info /srv/ meta-data=/dev/mapper/vg01-srvvol isize=256 agcount=38, agsize=1964032 blks = ...
0
votes
3answers
52 views

lamp — edit PHP file but doesn't change web output — including die()

Server is standard Linux server on Amazon Web Services. Cent OS 5/Apache/PHP 5.3. No APC. It's worked fine for over a year, but now when I edit some but not all PHP files on the server using vi, the ...
0
votes
1answer
50 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 ...
4
votes
2answers
83 views

Copy directory tree without empty directories?

I have the following tree # upper letters = directory # lower letters = files A |-- B |-- C |-- D |-- e <= file |-- F |-- G I need to copy this tree to another destination, ...
0
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0answers
48 views

How to access files on Linux server from windows faster than with Samba network drive?

I can remotely access my files at work via Samba. Unfortunately, on my laptop with Windows 7 I have serious lags when accessing this directory and working on its files. I just use a network drive ...
2
votes
1answer
35 views

What is the mrxdav.sys file and what file system is it used for?

I'm looking to know more about the mrxdav.sys file on Windows machines, and what is the difference between it and ntfs.sys, cdfs.sys or fat.sys?
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1answer
78 views

Shared storage solution for Debian Wheezy [closed]

I need to setup a new infrastructure which provides high available shared storage between debian servers. Our current solution is a "clustered DRBD NFS solution". We have setup 2 virtual file ...
3
votes
1answer
30 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? ...
1
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1answer
46 views

How do I replace the root filesystem (ext4) with a new one in LVM with one which has more inodes?

I have a few systems which have been running over a decade in a cluster on SLES 10 (now long past EOL). We're migrating to CentOS 6 64-bit. I got everything done but the final data syncs, and lo and ...
0
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0answers
44 views

Service running over network : Windows cannot access the file for one of the following reasons…appears once per day, How to troubleshoot?

Our prod. setup is one web server, one sql server and one application server. On application server we have services installed which located one the sql server. We never had problems accessing the ...
1
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1answer
175 views

Loss of data when trying to fix ext4 “group descriptors corrupted!”

When I try to mount an existing disk, I get the message sudo mount -t ext4 /dev/sdc1 /data mount: wrong fs type, bad option, bad superblock on /dev/sdc1, missing codepage or helper program, ...
0
votes
1answer
66 views

Which file system was I using?

This is an odd question of a somewhat forensic nature. I was running a server, which originally had openSuse 11.4 installed, and was upgraded twice (to v12.3 and v13.1). Recently, an update messed up ...
0
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2answers
77 views

How to increase inodes? [duplicate]

How can I increase the maximum amount of inodes available on a dedicated server running CentOS 6.5 and ext4? The websites we are hosting create and use millions of small files. We are already hitting ...
3
votes
3answers
207 views

Maintain setgid bit (after bower install or gulp build)

We run web servers where we have the following situation: The www-data user runs the web server and must have read+write access to the files The deploy user deploys all the code The bob and alice ...
2
votes
2answers
117 views

Memory mapping files for a blazing fast webserver on Linux

Is there any simple way of telling Linux to keep a directory of files cached in memory? I realized that Node.Js and Apache are spending most time on file I/O, making users wait if you have a lot of ...
3
votes
0answers
103 views

ESXi 4.1 VM gone after hard reboot

I have a serious problem here. After I forced a reboot of a freezed ESXi 4.1 server, a VM is literally gone. When I ssh to the host and run ls -lah inside the datastore, it returnes: ...
3
votes
1answer
125 views

Filesystem performance degraded during RAID rebuilding

So quick question - our RAID6 array is currently rebuilding and there is a VERY noticeable filesystem performance hit (home directories are NFS mounted on the array). I'd sort of expect that, given ...
0
votes
2answers
41 views

Nginx deleted file still downloads

Scenario: Create a random file (1024M in this case) dd if=/dev/zero of=file bs=1M count=1024 Initiate download (curl src > /dev/null) Delete the file from the server Curl still downloads 100%, ...
1
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1answer
80 views

mount using nfs4 giving no such device error

I am trying to mount a folder workspace from server to the client over NFS. For this I bind the folder to an /export by adding the following in my /etc/fstab on server: /home /export none bind ...
7
votes
3answers
408 views

Install application/HTTP services to “/srv”?

I have been working with a team who used to install all the application and HTTP services like Apache or Tomcat to the '/srv' directory. I suspect mostly in order to keep the installed services ...
3
votes
4answers
481 views

Performance difference between ramfs and tmpfs

I need to setup an in memory storage system for around 10 GB of data, consisting of many 100 kb single files(images). There will be lots of reads and fairly periodic writes(adding new files, deleting ...
5
votes
5answers
391 views

Bash: mv directory one at a time

I am trying to move all subdirectories of a folder to another share on the same server. If I do a mv *, I will run out of space since the folders are not removed until all folders get transferred. ...
2
votes
1answer
46 views

How to add partition table to existing EXT4 filesystem

I have software RAID6 on 8x3TB disks (18TB), there is filesystem od device /dev/md1, but EXT4 can`t be bigger than 16TB so there is 2TB of free space. I would like to use this space. My first idea was ...
0
votes
0answers
77 views

Force filesystem check on Ubuntu Server 12.04.4 LTS

My root filesystem has errors. I have made sure that errors will be automatically corrected: root@host1 ~ » grep FSCKFIX /etc/default/rcS FSCKFIX=yes And then forced a filesystem check during ...
5
votes
2answers
859 views

Why the path “//” is working?

Tested on a debian and debian-based: $ cd // && pwd && ls // bin build dev home ... Why is the path // a valid path?
0
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1answer
24 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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votes
1answer
33 views

Server Writing Blank Files

I have an old desktop that sits on the side of my desk at my office. I use this as a web server to demo websites (it doesn't host any "live" production sites). I've never had many issues with it ...
0
votes
2answers
135 views

Best parameters for ext4 filesystem for storing virtualbox disk images

I have partition, which I'm going to use for keeping VirtualBox disk images (VDI, or may be VMDK). They are fixed-size (not dynamically-allocated) images. There are no other files/directories on ...
0
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2answers
35 views

linux minimal block size [closed]

Question : I would like to know if one could create an empty partition with a very small block size, say 100 bytes, and get their experience on the long run. Are there any gotchas ? Context : I ...
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votes
3answers
171 views

How to find out capacity for network interfaces?

I could get the capacity for the network interface by lshw, but which file in sysfs is this information stored(i.e. which file in /sys/class/net/eth0/device/ directory)? $ sudo lshw -class network ...
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votes
1answer
41 views

manually clearing my ubuntu-based linux tmp folder while booted from a linux live cd [closed]

If it is a temporary folder, then nothing should be required to remain there. Now I'm not looking to cause myself issues and I could just leave well enough alone but there are always folders and ...