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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ProxMox I/O Errors on EXT4 FS

I recently got ProxMox up and running after months of deliberation as to which HyperVisor I wanted to use. Last night I almost finished transfering my applications to containers and the system was ...
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8 views

What happens when I press Ctrl+C when e2fsck running?

What happens when I press Ctrl+C when e2fsck running ? will it go to command prompt ? or it will reboot & then the server again goes to fsck ? Reason Why I want ? I want the server to up ...
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8 views

Windows Object Access Audit vs File Properties “Accessed” Date/Time

I'm attempting to audit all attempted access to a specific executable on a Windows 2008 R2 system, and have turned on success and failure auditing for all subcategories in "Object Access" in Advanced ...
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2answers
16 views

Prevent root in linux from changing folder permissions in GPFS filessystem

I have created a NFS export in a GPFS/SpectrumScale filesystem I created. I have enabled AD based authentication with our domain. Everything works. The NFS export was created with NFS4. The NFS ...
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1answer
13 views

Unable to mount NFS export unless I sudo to root

I created an NFS export on a GPFS/SpectrumScale filesystem I set up. I tested the NFS export on a xLinux, pLinux, z/OS and AIX succesfully. I then enabled AD based authentication on the NFS export ...
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1answer
135 views

How can I set up a filesystem directory to *always* be group writable?

I have a Linux file server with some shared directories. These directories are sometimes accessed over SFTP, and sometimes by users with shells. Regardless of how these directories are accessed, I ...
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5 views

Which version of OCFS2 is Required for Global Heartbeat

I am running Ubuntu 14.04 (Trusty) and have several iSCSI LUN's setup with the OCFS2 filesystem and local heartbeat. Since I have several OCFS2 formatted LUN's in my luster, I thought it would be ...
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2answers
18 views

Can LVM VG Contain PVs With Different Filesystem Types

Assuming of course, that both filesystems support LVM functionality. I originally thought yes, since this is an abstraction layer, but when googled couldn't find a direct confirmation.
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3answers
53 views

What is the most suitable path on Windows workstations to store admin scripts? [closed]

We have a need for a GPO to store admin scripts locally on Windows workstations (7 and above), and I was wondering if Microsoft has any recommendations or if you have any experience or thoughts on ...
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1answer
33 views

is there a way to findout about a file history (create date / create directory / moved directory ) ? [duplicate]

so i found a shell deep in a directory of my website . my website doesn't have a upload section and i use a well known framework and it covers sql injection ( i use codeigniter active record to work ...
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0answers
20 views

Grub Rescue, always getting unknown filesystem

After launching fsck command and rebooting a Debian server, i run into grub rescue mod. So am trying to recover my system but with nothing when i execute ls i get : (hd0), (hd0, msdos5), (hd0, ...
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7 views

What is the max number of hard links in OS X (10.11)? [migrated]

Does anyone know how I can find out what the maximum number of hard links is in OS X (10.11, El Capitan)? (I have a file that I keep linking to. It's up to 45 links now.) Feel free to recommend ...
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1answer
28 views

ext2 or ext3 without journaling

I've recently came across several servers with different "strategies" for their /boot partition (btw, always as /dev/sda1, 512M) Some servers use ext2 for /boot, some use ext3 for /boot, and for the ...
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0answers
28 views

Troubleshooting with kernel call trace and underlying root cause with XFS

How to determine the root underlying cause of an error when looking through a Linux kernel call trace, and in which order should I read the call trace? From my understanding, the call trace should ...
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0answers
32 views

Disk and Inode quota both exceeded; cannot delete anything

(I am using a UFS file system on a Solaris server. I have root privileges on the machine, but not on the machine that contains the disc in question.) I am receiving a "Disc quota exceeded" error when ...
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7 views

Drobo file listing no showing [migrated]

I have a drobo that has a TON of my personal information on it. I've recently had some issues with it and it had to rebuild its entire structure I believe. It took about 2 days before it finally ...
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5 views

Samba as a layer above custom storage

Does Samba allow to use some sort of custom storage? I would like to serve virtual files with my application and to use Samba for serving them to (Windows) clients. Is it possible? I know there are ...
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0answers
38 views

Can't mount BTRFS with write permissions. Btrfs check crashes (Core dumped)

I was using btrfs filesystem for some time on one of my external drives mainly to test deduplication and everything was working just fine. Unfortunately yesterday when I mounted the partition I ...
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1answer
29 views

Not able to ssh into server after mounting users home on other ebs volume [closed]

I have a server which has a low storage problem. What i want is to mount the user ec2-user's home directory that is /home/ec2-user to another attached storage drive which is available at /dev/xvdk and ...
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2answers
27 views

what are my options for linking directories

I have a configuration file which refers to a file structure. This is what I have <?php // HTTP define('HTTP_SERVER', 'http://XXXX.co.uk/public_html/'); define('HTTP_IMAGE', ...
3
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1answer
61 views

Server 2012 R2. Add permissions to all folders and subfolders when inheritence is disabled

I need to add full permissions for a specific group of users to all folders/files and subfolders on our file server without changing other permissions. Few years ago someone removed "Administrators" ...
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12 views

/dev/mapper/vg-root shows 100% usage [duplicate]

/dev/mapper/vg-root shows 100% usage even when the du command shows that more than 90% disk space is available, this is a 200GB disk.I am running CentOS 7.x please let me know the issue ? [fg@79732 ...
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1answer
47 views

How can I track why files are getting deleted on my Windows Server?

I have a Windows 2008 R2 server running a third-party web app. The web app generates log files and those log files are getting randomly deleted. The vendor support isn't able to reproduce the issue ...
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1answer
29 views

What is the “right way” to combine sync and drop_caches?

When I need to do echo 3 > /proc/sys/vm/drop_caches with a sync beforehand, is it better to use sync && echo 3 > /proc/sys/vm/drop_caches or sync ; echo 3 > ...
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40 views

change file system from ext3 to ext4 effict on MySQL

I have a situation where MySQL was installed in Linux with a ext3 file system. One table (InnoDB) reached the maximum size allowed for ext3 (2 TB) , insert statement gave "The table 'foo' is full". I ...
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3answers
254 views

Generating a lot of dirty pages is blocking synchronous writes

We have processes doing background writes of big files. We would like those to have minimal impact on other processes. Here is a test realised on SLES11 SP4. The server has massive memory, which ...
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1answer
59 views

Server Backup reports incomplete backup [0x80070020] due to item in System Volume Information Folder

My Windows Server 2012 R2 Essentials server has started throwing the same error each time during daily backups, each backup has this error in the failed items backup log: Error in backup of ...
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0answers
13 views

What will happen if i delete the Sys Folder on Debian Wheezy

it might be a noobie question, but i'm interesting in what the result would be (without trying). I was restoring my filesystem of my Debian Wheezy from a backup.tgz. According to some tutorials like ...
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1answer
24 views

HP UX iostat on File System

I have a server running HP UX 11 OS and I'm trying to have I/O statistics for File System and not disk. For example, I have 50 disk attached to the server when I type iostat (here under output of ...
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2answers
56 views

Lightweight transparent compression filesystem?

I have an AMD64 KVM VPS at RamNode, it has 30 GB disk, 256 MB RAM, and 1 "virtual CPU" (I have no idea of the specs of the host CPU). It will be used to store many small, easily compressed files, ...
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2answers
22 views

Using the output of a program as the contents of a file, dynamically

In Linux, I would like to create a file where the contents of the file are dynamically generated by the output of a program. The examples which already exist are /dev/random /dev/urandom, /dev/zero, ...
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1answer
24 views

File transfer (copy) queue for a Linux cluster

I am running (on CentOS 6) a cluster connected to the head node over a slow network. Each spawned job needs to pull a ~1GB file from the head node to the compute node, and then process it locally. The ...
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31 views

Cannot remove stale file on btrfs

I have a btrfs filesystem which in one directory has the following entry: -????????? ? ? ? ? ? 1448367601.M899489P12992.mst19,S=8958,W=9072:2,S I cannot remove this file, every operation ...
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2answers
44 views

Linux - wrapper to monitor an application's file access? [closed]

Are there any user-level wrapper-like scripts/programs that can watch what files an application accesses, without impacting performance? I'm trying to capture what files are produced by an automated ...
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2answers
73 views

I have 757 permission on some specific Linux directory. How can I grant read only access to user1?

757 allows read, write, execute by owner + read, execute by owner group + read, write, execute by others. Is there any way arround to specificaly allow read only to user01? Please exclude the ...
2
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1answer
49 views

What does sunit=0 and swidth=0 mean for XFS file system?

I created an XFS file system using default parameters at the time of creation of a system. Now looking at the output of xfs_info, it show 0 for the values of sunit and swidth. I can't seem to find ...
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1answer
29 views

Restoring brick on new server failes -

I am triying to attach a brick from another server to a local gluster development server. Therfore I have done a dd from a snapshot on production and a dd on the lvm volume on development. Then I ...
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3answers
75 views

Identical directories on Linux file system are not symlinks. What else they could be?

I found two directories on some of my systems which are completely the same. All subdirectories and all files are the same. When I delete a file in one directory it disappears in other too. This would ...
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1answer
116 views

Heavy linux server load when many files in directory

I have a website that generate images for each user, which are stored in /images/user/. I have a server with 8 CPUs, so maximum server load should be 8, but the load on my server reach 100, 150, 200. ...
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31 views

glusterfs backup - how to migrate image to new server?

I am running glusterfs on a 3 node prod server with thinly provisioned LVM-Volumes. My goal is to automate a backup process that is based on gluster snapshots. The idea is basically to run a shell ...
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3answers
128 views

Why there shouldn't be too many files in one directory that serves just static web requests?

This might be a very general question but I really like to find some detailed answers or clues. I am discussing this with a friend, trying to convince him to put more than 300,000 files from one ...
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26 views

filesystems for scratch devices on solaris 11?

Can anyone suggest what filesystems are suitible for scratch disks? note majority of io will be via mmap. By scratch i mean scalable to many terabytes, but for short lived data that can be ...
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1answer
55 views

How can I check if a directory contains the same files of a TAR archive?

Let's say I have a folder Documents and a TAR file Documents.tar, how to check if the tar file contains the same files that are present in the directory? The more obvious solution to me would be to ...
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0answers
9 views

Get direct block addresses - Sleuth kit - XEN

I am using sleuth kit library in order to write an introspection tool for XEN hypervisor and my question is if we have the inode number of a file on a disk [ guest VM - ext4 filesystem], for example ...
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3answers
41 views

How to mount large LVM image on ubuntu 14.04 on root?

I am running ubuntu 14.04.03 and need to mount thinly provisioned lvm volumes for glusterfs to the system. I did this first by adding them to /home/glusterfs/dir, this worked as /home has 120G of ...
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3answers
34 views

Is it possible to have orphaned hard links?

I'm not sure if it is even possible to have an orphaned hard link. Let me explain why I'm asking. Bear with me. My Setup I am using rsync to sync my file server to my backup server. I am using the ...
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1answer
20 views

Directory vs Files for efficient search and retrieval of files

I am working on a website where users have ability to store all kinds of media on the server and there can be any number of users. I thought I would store all the media which users upload like this: ...
2
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0answers
27 views

Grow ZFS pool to use the whole disk

What's the (if there's any) way to grow a zfs pool that only uses a disk partially to use the whole disk? Background is, zfs is used here on a virtual machine and the Virtual machines disk has been ...
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1answer
34 views

Is reboot necessary after expanding a disk/partition?

I'm running a virtual machine (Ubuntu 14.04 LTS) on VMware ESXi. The virtual machines needed extra storage as to why i raised the disk size in ESXi, and ran pationing etc. from the virtual machine ...
2
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1answer
44 views

Get file system write cache queue size

I am copying a large amount of files from one server to another via robocopy to a UNC share. I notice that after robocopy completes that there is a large amount of disk activity that lasts for a ...