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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Alternative to robocopy /MIR

We run a number of web apps that store a lot of local data in small xml files. One part of our backup / recovery strategy is to produce a local mirror of the file system via a VPN to the hosting ...
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3answers
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Re-sizing disk partition linux/vm

I VM Player running a linux guest and I was wanting to know how do I expand the disk? In the VM player I gave more disk space but I am not sure how to mount/expand/connect the new disk space to the ...
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0answers
12 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

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
43 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 ...
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
28 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
40 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
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1answer
253 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
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1answer
85 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 ...
3
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3answers
702 views

Unable to list contents/remove directory (linux ext3)

System is CentOS5 x86_64, completely up to date. I've got a folder that can't be listed (ls just hangs, eating memory until it is killed). The directory size is nearly 500k: root@server ...
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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 ?
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1answer
19 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
26 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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2answers
46 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 ...
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2answers
286 views

Is atime/mtime updated on fopen, fread/fwrite and/or fclose?

I'm just curious; Is atime updated on fread, fopen and/or fclose? What about mtime? Is it updated on fopen, fwrite and/or fclose?
0
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1answer
30 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
25 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 ...
9
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1answer
3k views

Read/write access for passthrough (9p) filesystems with libvirt/qemu?

I have recently started experimenting with the support for passthrough filesystems in recent versions of KVM/QEMU/libvirt. Making the filesystems available for read access has "just worked", but I'm ...
4
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4answers
12k views

Debian, How to convert filesystem from ISO-8859-1 into UTF-8?

I have a old pc that is running Debian stable, that is in need of a upgrade. The problem is that it is using latin1 (ISO-8859-1) for everything, and since the rest of the world has moved to UTF-8 I ...
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1answer
1k views

prevent filesystem from entering read-only mode

I have found that my server's filesystem is continuously entering read-only mode. There have been some issues with the raid1 array, but I have removed the bad disk from the array. However, it is ...
0
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1answer
9k views

Deleting windows.edb and unchecking Indexing service lead to hard drive file records swapping

I followed the instructions listed here:http://www.mydigitallife.info/2007/09/18/turn-off-and-disable-search-indexing-service-in-windows-xp/ to free up space on hard drive by deleting the windows.edb ...
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4answers
2k views

Can't mount nfs volume - time out

I have an NFSv3 export from a Linux fileserver which used to mount fine. The fileserver had to go down for hardware maintenance. After bringing the server back up, the Linux client can no longer mount ...
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6answers
4k views

“Mount” cloudfiles on a Linux server?

Is it possible to 'mount', for ignorance of a better term, a cloud service like as Cloud Files or S3 to a linux / ubuntu server? Ideally I'd like to be able to browse the remote location as if it ...
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2answers
68 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 = ...
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1answer
862 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 ...
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2answers
892 views

mkfs.xfs: libxfs_device_zero write failed: Input/output error

I can't find a way to create a filesystem on one of my disks. first i'm geting the following output: [root@~]# mkfs.xfs /dev/sdb1 mkfs.xfs: /dev/sdb1 appears to contain a partition table (dos). ...
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3answers
48 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 ...
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2answers
1k views

Remove invalid SIDs from filesystem ACLs in Windows

Is there an automated way to traverse a filesystem and remove any ACL entries that reference invalid SIDs in any version of Windows with NTFS?
2
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2answers
617 views

How can I access user files on a disk moved from a Windows 7 machine to an XP machine?

I moved the hard drive from one machine (Win 7) to another (XP) and now certain folders tell me "Access denied". I am logged in as an administrator. I had a different account on the other machine. ...
2
votes
3answers
824 views

zfs rename/move root filesystem into child

Similar question exists but the solution (using mv) is awful because in this case it works as "copy, then remove" rather than pure "move". So, I created a pool: zpool create tank /dev/loop0 and ...
4
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2answers
81 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, ...
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0answers
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 ...
3
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2answers
123 views

can 'Percona MySQL Data Recovery' be used to recover dropped tables if the datadir filesystem is mounted as /

according to Percona: Unmount the filesystem or make it read-only if... You have filesystem corruption OR You have dropped tables in innodb_file_per_table format If I have innodb_file_per_table ...
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votes
1answer
71 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 ...
2
votes
1answer
32 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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7answers
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Do I need to defrag unix filesystems?

I know Windows file systems are very sensitive to fragmentation and Unix such as UFS, ZFS, ext3, or ext4 are not as sensitive. But, is there any reason to defragment these filesystems at all? If so, ...
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? ...
22
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7answers
36k views

df in linux not showing correct free space after file removal

I have file servers which are used to store files. Files might reside there for a week, or for a year. Unfortunately, when I remove files from the server, df command doesnt reflect the freed up space, ...
3
votes
3answers
2k views

Robocopy hiding folders on backup drives

I have a backup batch file that uses Robocopy to backup my files (note this example contains newlines that you should remove): robocopy "C:\" "G:\Default\RoboCopyBackup\C" /XF Pagefile.sys /XD ...
1
vote
1answer
43 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 ...
3
votes
3answers
198 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 ...
0
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0answers
37 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
157 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, ...
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2answers
871 views

Does btrfs have an efficient way to compare snapshots?

While diffing mounted snapshots would work, it sounds like it could be horribly slow in many cases. Is there btrfs specific functionality for diffing snapshots? (I was unable to find any in the docs) ...
0
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1answer
63 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
76 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 ...
0
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2answers
34 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 ...
0
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2answers
124 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 ...
2
votes
2answers
108 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 ...