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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100 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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102 views

How to organize millions of static files to serve efficiently over the web?

I'd like to create a service to serve several hundred thousand smaller files (from 5kb to 500kb, mostly around 10-100kb). Think of it as a kind of gravatar.com which serves those little avatar pics on ...
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839 views

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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1k views

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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175 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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53 views

Can NetApp filers/shelfs be directly connected to Linux?

I have a NetApp FAS2050 which is no longer in production. It have 4 disk shelfs. So I wonder: Would it be possible to connect the disk shelfs directly to a Linux host with a LSI adapter, and then ...
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57 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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77 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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73 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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147 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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80 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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50 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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416 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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173 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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0answers
167 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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854 views

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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91 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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8 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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24 views

deciding the filesystem to store mysql database

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 ...
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45 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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36 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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68 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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304 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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64 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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37 views

Make new files group-writable?

Is there a way to configure a Linux directory such that any time anyone in the group that owns that directory creates a file in the directory, that file will be writable by anyone in that group? I'd ...
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77 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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60 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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782 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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71 views

Why does xfs_db show ifree=0 but I can still create files?

Recently we ran into a problem with an xfs file system reporting that it had run out of space, even though there was lots of free space left. Because it is a backup volume, we ran into the 5% of space ...
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340 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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322 views

file system rootfs, which is mounted at /, reached warn status because it is 90% full

I have a dedicated server with OVH. Problem is that i keep receiving warnings that the / is getting full. Yesterday it was 89%, today it is 90% and tomorrow it will probably be 91%. It keeps ...
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35 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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45 views

Accidentally mounted / in two places. How do I fix this? (And how do I mount it correctly to the device I want?)

I'm using a test Amazon EC2 server with a small (~10GB) disk at /dev/xvda1. I also have a block device (~500GB) attached at /dev/xvdb. I want to use the larger device (/dev/xvda1) for everything so ...
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0answers
54 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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0answers
80 views

Cant remove linux ln hard links

I am using CentOS 6.3 and am logged in a root. When I create a hard link by doing this: ln /root.hdd /somedir/root.hdd That works fine, the inode shows the same between the two files and ...
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33 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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0answers
357 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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0answers
99 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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56 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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818 views

Formatting SD card with yaffs2 (using mtd2block)

An answer to my previous question: Making SD card corruption-proof suggested using mtd2block and formatting the SD card with yaffs2 or JFFS2. I don't really have experience with creating images of ...
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125 views

What's the risk in turning off Windows XP file system tunneling?

File system tunneling is discussed in the answers to this question: Incorrect file creation date in Windows XP/Vista Does any recent software depend on file system tunneling to maintain the creation ...
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0answers
168 views

File exists but is unreadable by PHP

More than once I have ran into this issue: I have a cache file that is automatically generated by PHP. It contains some generated PHP code. However for some reason the file cannot be read and parsed ...
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0answers
581 views

XEN Domain crash - kernel panic

I have a server with CentOS 5.8.Final, running the 2.6.18-308.4.1.el5xen kernel. I installed the Virtualizorpanel 2 months ago and my VPS are OK, but yesterday one of my VPS crashed. I changed theRAM ...
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50 views

Deleting file in AFS slow in the morning

When I come into work in the morning the first thing I do is authenticate to Kerberos and run aklog so I can access my AFS file system. I then delete an old tripwire report in my AFS space that I ...
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939 views

Can't mount logical volume, RAID/MD/LVM problems

I have a file server with 48 2TB HDDs split across 2x 3ware 9650SE-24M8 RAID cards. Both cards have 24 drives in RAID 1+0. MD softraid is setup in raid 0 with the two RAID 1+0s making RAID 100. LVM2 ...
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0answers
112 views

I can access \\server via explorer but a program wont

From ServerA I can access \\ServerB\Telephony\Files\abcdefgh.pdf using windows explorer. From the same ServerA when I try to access the same file on ServerB using a program (a program that imports ...
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0answers
217 views

File-level SSD cache

My windows development environment gets pretty slow sometimes, it's a huge code base. I was thinking of speeding this up by using an SSD, but I want a way to do it while not requiring myself to carry ...
0
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0answers
105 views

Utility that waits for file to show up, then can execute a batch file when it shows up

I'm looking for input from the community for a utility that can set up a filesystemwatcher, ie, it can hook into File System events that detect when a file is created in a specific directory, and then ...
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142 views

how to read file system headers?

I want to know the abstrat content of a page in a file system in a disk image(not necessarily over the network). I believe the best way to do it is to read the file headers. but i do not know how to ...