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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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 ...
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710 views

Mount Docker container contents in host file system

I want to be able to inspect the contents of a Docker container (read-only). An elegant way of doing this would be to mount the container's contents in a directory. I'm talking about mounting the ...
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231 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: ...
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rsnapshot frequently ext3-fs error: “ext3_lookup: deleted inode referenced:”

I've having following problem frequently on our backupserver. I'll try to explain the issue in the hope somebody could clarify why and how to fix it Setup details We have a DELL r200 server attached ...
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Recovering a VHD after resizing it using VBoxManage

I am using VirtualBox 4.1.18 and had a virtual machine running Windows 8 RC with a single VHD, which was initially sized at 25GB (too small!). After installing the OS and some applications I ran out ...
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240 views

What ZFS file structure to use for zfs-root linux system?

In ZFS, you can build your filesystem hiearchy to include different fs-attributes per filesystem. For insance, compression in one area, no-exec/suid in others, noatime. For example, a HOWTO for ...
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35 views

Can't mount read-write iSCSI with MTU=9000

I'm attempting to connect my desktop (running debian 7) to a QNAP NAS (running QTS 4.1.1) using iSCSI with an MTU=9000. The network infrastructure consists of a cat5e crossover cable between the ...
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30 views

Excessive disk usage with virtfs / cpanel

I'm running a server using cPanel, with virtfs enabled, and seeing very high disk usage compared to the amount of data actually uploaded/created by each user. I am getting DISKWARN emails telling my ...
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19 views

IS GlusterFS filesystem partition smart enough to shrink in size due to new data on the server?

I'm new to GlusterFS but it works really well for me as a distributed file system. I have a question about my setup and if I should use the partition I store the GlusterFS brick on for anything else. ...
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31 views

“Hot data” and erasure coding: how to know if it is efficiently handled?

It is well known that erasure coding adds extra complexity because of encoding and decoding operations. Due to this drawback, most of cloud services recommend to use data replication for hot data and ...
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239 views

Directory index full, is this fsck result OK?

I found these in my /var/log/messages: kernel: EXT4-fs warning (device md2): ext4_dx_add_entry: Directory index full! kernel: EXT4-fs warning (device md2): ext4_dx_add_entry: Directory index full! ...
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65 views

Directories converted to files

Our development team went to start HTTPD and got this: Starting httpd: (20)Not a directory: httpd: could not open error log file /etc/httpd/logs/error_log. Unable to open logs ...
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3k views

Apache Tomcat setting Max file upload size

I am implementing a Grails/Groovy web app, I want to limit the user's file upload size, I don't want someone uploads a 10GB file to my server. What I figured out was that most approaches to calculate ...
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104 views

How do I speed up “ls -l” on a network file system (NFS)?

I have a NFS volume mounted in the following way: theHostname.com:/path/on/theHostname on /local/path type nfs (rw,nosuid,addr=10.0.0.54) The /local/path directory has 30_000 files. When I do a ls ...
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109 views

Can't mount ecrytpfs as a non-root user on Red Hat

I'm trying to mount a ecryptfs volume on Red Hat as a regular user. ecryptfs-utils is installed from source (repos only contain old versions). Mounting as root works normally, but trying with a ...
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327 views

Slow network file access on windows 2008

We have a really poor business application that uses access databases (I know, fail!) as its back end. There are lots of access db files it uses, all about 4mb in size. If I copy the files locally ...
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103 views

In linux and solaris, what is the UUID based off of?

If you run dmidecode|grep UUID you are given a "globally unique string of characters" which can be used for licensing purposes. In linux, the format is usually something like this: ...
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70 views

Dynamically allocating limited disk space per user on NTFS

I'm designing a module that needs to allocate dynamic, limited disk space per user. Based on a large NTFS filesystem, I want each user to tell me how much space he want's extended to him, and then ...
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615 views

How do I reboot over SSH, so that fsck can be run, on a read-only file system without sudo (or root)?

I have a server in a remote location, which I think is suffering disk issues and has remounted / as read-only. My Debian (Squeeze) installation does not have a root user. I have been using sudo to ...
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260 views

Ubuntu 10.04 Server stuck at grub prompt

I have a virtualized server running 10.04 LTS that is no longer booting. We had a number of issues with our SAN that abruptly disconnected the storage from the virtual machine infrastructure and ...
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175 views

Slow Client to Server transfer speeds… Fast Client to Client

Client : Windows 7 x32 | Dell Latitude E6510, transferring to another identical machine over the network.. 120mbs. Transferring to any server (2003 server, 2008, 2008R2, or VM's) I can not get more ...
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network-mapped file system drops to read-only mid-stream, buffer I/O error with device mapper

Under linux 2.6 (CentOS 5.3 actually), I have a file system that works okay for a few minutes, then drops to read-only mode, while I am trying to read/write data to it. It is an ext3 file system ...
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96 views

Effective backup and archive strategy for database and linked files

I am using Postgres to store a variety of application data for a webapp. Part of the application involves storing and retrieving user uploaded files. I am storing the files in the filesystem with ...
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14 views

Lost space (tmpfs+aufs)

I have squashfs+aufs file system in a modified CentOS 5 "live cd" operating system (it's custom made live cd, not the one from CentOS). Something is eating space and I can't find out what (see du ...
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22 views

Order of execution: First file system, then array vs. first array, then file system

Suppose I have two HDDs, same manufacturer, same model, same attributes (volume, speed, cache, ...). Both are equally partitioned. I want to have a level one array of two disks with one ext4 ...
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199 views

s3fs “could not determine how to establish security credentials”

I'm trying to use s3fs to mount an S3 bucket on to a standard AWS Amazon Linux AMI (with all the necessary dependencies installed). However when following this tutorial when I run: s3fs mybucketname ...
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32 views

Check Filesystem of Root Volume (Amazon Linux / RHEL)

How can I check the file system (and repair potential errors) of the root EBS volume (/dev/xvda1) of an Amazon AWS T2 instance? The instance runs the latest version of Amazon Linux (RHEL). Is it ...
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58 views

Dealing/Fixing the Ploop issue with OpenVZ — relclaiming lost space

So OpenVZ Ploop has a bug where if users add then delete files the space becomes unclaimed and the disk eventually runs out of space. Now there is a script that fixes that(included below). However, ...
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68 views

OpenBSD automatic filesystem check at reboot

I want my openbsd server to boot, no matter what and dont break with waiting for manual FSCKing. It's easy to do in linux, but in obsd it just doesnt want to be "auto". Last time I set the 6th,7th ...
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26 views

KVM Image consumes more space on disk than what du shows

I have a kvm image which by looking at it with du -sh consumes 13GB (12980888) but in reality it consumes 42GB. Found that out the hard way when I scped it and after 18GB it was still copying ...
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34 views

Stop gluster volume to increase initial sync

I have a question with no answer at the moment. I have a running glusterFS node of 2 brick, replicated. From a third server we are migration around 1.5T small files (less than 1 kb) to the node01, ...
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198 views

Possible SMB issue after server migration

im troubleshooting a performance issue with one of our applications after a server upgrade. We have moved from server 2003 SP2 to 2008 R2 for our file/print. The application is installed locally on ...
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73 views

Linux filesystem ext4 fragmentation

I have a question about the filesystem ext4 and disk fragmentation: Does ext4 place files in the same directory near or next to each other on the disk? And if so how is it fragmented, for example is ...
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0answers
103 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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89 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 ...
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217 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 ...
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250 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 ...
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2k views

ZFS import unable to find any pools

I had a ZFS pool -- a mirror containing 2 vdevs -- running on a FreeBSD server. I now have only one of the disks from the mirror, and I am trying to recover files from it. The ZFS data sits in a GPT ...
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198 views

AIX JFS2 I/O performance problems

I have a fresh installation of AIX 7.1. I noticed that JFS2 file system with logging enabled (log=/dev/hd8) is dramatically slower than one with log=NULL. Simple zip archive extraction takes 5 minutes ...
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111 views

RAID5, unknown filesystem and disk failure

I have an Ubuntu 12.04 machine with 3 disks in RAID5, and the RAID controller is on the motherboard. After almost a year of flawless use, it seems that one disk had a failure. Every time I restarted ...
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0answers
99 views

Linux Kernel messages in log - disk write seems to be hanging on database

I was having database issues whereby commits were not completing (PostgreSQL) and it seems to be related to these messages that are filling up my server log: Jan 30 02:29:45 server001 kernel: ...
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544 views

Direct I/O on Linux

I'm trying to enable Direct I/O on /opt (/dev/sda6, ext4) on Linux Mint 13. What I'm trying is: mount -o dio,rw /dev/sda6 /opt as root. The system responds with: mount: wrong fs type, bad ...
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36 views

How to rearange disks with a new SSD

Here is the problem: I have a Debian server with only 4 disk bays. At the moment there are 4 x 1GB SATA disks in software RAID 10. I'd like to swap one of the SATAs with a 1GB SSD disk and move the OS ...
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28 views

Can quotas be turned on automatically when file system is mounted?

I was not clear on this point-- I have quotas enabled in /etc/fstab for several file systems on a file server. However, I have noticed that if I unmount the file system and then remount it (ext4), ...
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66 views

Prevent mountpoint from being remounted read-write

Is it possible to force a filesystem to be read-only, unable to be remounted (even by root) as RW? It is not necessary that the mounted volume be recoverable after reboot. One way I have experimented ...
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38 views

Deleting a large error log file

We have a few PHP sites running on a windows server that are generating errors in the c:\windows\temp directory under a single log file. This file is nearly 30gb at this point. When I try to list the ...
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660 views

How can I move s3 objects >5gb from one bucket to another?

Objects larger than 5GB are supported with multi-part uploading. We have 5gb+ files in one bucket already that I'd like to move to another, under the same AWS account. When I issue the command using ...
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125 views

Samba: Moving File Loses ACLs

We have implemented Samba on our campus. Accounts and groups are maintained in an LDAP DIT. Access to shared folders is group based. Our Samba share definitions have something like: valid users = ...
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67 views

List unsynced blocks/files?

Is it possible to somehow list changed blocks or file system buffers that have not been written to the disk yet? How?
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XPEnology - Filesystem

I've looked all over but I can't seem to find a straight answer. I have 4 NTFS drives with data on them - are these compatible with a fresh install of XPEnology? The aim is to obviously share the ...