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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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 ...
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21 views

What is the chance of a bit being miswritten during a file copy? [closed]

I'm on Windows 7. I'm copying a huge number of very large files. What is the per-bit chance of a file miswrite during copy? I don't have a good intuition for even the order of magnitude here. ...
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0answers
34 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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0answers
20 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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0answers
13 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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1answer
49 views

Change file system from case-sensitive to case-insensitive [duplicate]

I have a CentOS bare metal with 1TB SSD and, a couple weeks after having my application in production, we noticed it needs to be case-insensitive. Is there any easy way to accomplish this? Also, ...
3
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3answers
184 views

rsync many small files with long filenames takes a lot of bandwidth

I have a file storage server which stores files on disk using the file's sha256 hash as the filename, along with the file extension, and in three levels of directories, e.g. a PDF file with sha256 ...
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2answers
36 views

Migrate Users Directory on Windows Server 2008

I have a 137 GB c:\ drive on a Remote Desktop Services server that is full to the brink with user files. I have a 1.2TB e:\ drive that is totally empty. I need to move the c:\users directory from c:\ ...
2
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2answers
314 views

Alternative file system/volume manager for ZFS w/ non-ECC RAM?

It's not recommended to use ZFS for a computer without ECC RAM. So, what's a good alternative then? Or is the risk the same, so it doesn't matter what manager I use, it'll be the same problem if a bit ...
2
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1answer
33 views

Will noatime on a tmpfs volume improve performance?

I am using /run/shm/myfolder for nginx micro caching, also keeping ngx_pagespeed files there. I am wondering if there will be a speed increase if I go from relatime to noatime? It's for HDD, but on a ...
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2answers
77 views

Which file system best handle multiple, concurrent write sessions [closed]

Which file system best handle multiple, concurrent write sessions Which file system can handle more concurrent write sessions; let’s say 32 write sessions? The file system has to handle 32 ...
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1answer
41 views

Is it possible to force a specific program to use virtual memory?

Let say I have 1GB RAM Ubuntu, I need to run both memcached and redis on the same machine The usage of memcached is quite heavy (e.g. 1K read per second) and redis is less heavy (but still 10 read ...
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0answers
17 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. ...
6
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2answers
121 views

Calling sync/fsync slows IO after 30 minutes uptime

After 30 minutes of uptime using Ubuntu 14.04 with an ext4 hybrid SSD I see many processes blocking IO using iotop. The root cause of this slowdown has been traced back to the Unix system call sync. ...
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1answer
46 views

Filesystem (or another use) for totally unreliable, old hard disks on a Linux system [closed]

I've got a couple of disks lying around which are small in capacity and old enough to be considered spinning spinning rust, my gut instinct is to not trust them, but the damn things still work. ...
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1answer
31 views

FreeBSD and tunefs(8): minfree option

The minimum free space threshold in FreeBSD is 8% which I think is too high. In a 1 TB Hard Drive, 80 GB of space is unusable. I need some more space in my hard drive. I want to reduce this ...
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3answers
86 views

delete millions of files within a directory [duplicate]

The other day I ran bleachbit on my system. I had enabled wipe disk space option in it. It took several hours and my disk space filled up completely (100GB or so). After waiting forever, I decided to ...
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0answers
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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1answer
38 views

How to save Tbs of Photoshop Files efficiently in my file server? [closed]

I have a File Server with 1Tb of PSD(photoshop) files. We are a printing company and this psd are directly being used by online editor panel. I am try to compress these psd but I can't zip/tar them ...
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0answers
189 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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1answer
28 views

Analysing root cause of file system errors in Debian

My VPS hosting provider just helped me to restart my Debian VPS after it failed to reboot. He told me there were file system errors but told me to refer to the logs in order to find out what happened. ...
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0answers
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 ...
8
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2answers
293 views

Filesystem Hierarchy Standard - Where to put sourceable functions?

I have a few bash scripts running system checks. These scripts source configuration options from a file /etc/healthchecks/config. Along with the config file, I have a shared functions file. The ...
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1answer
52 views

How to generate random files and directories that are scattering across the whole partition? [closed]

I want to perform a heavy test of using "resize2fs" to shrink the file system. Currently, I have script that creates a few hundred thousand files taking several hundred GB. But it doesn't take very ...
0
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1answer
32 views

Restoring OpenVZ Container Filesystem Backup

I have a server running OpenVZ -- everyday, a full filesystem backup is made to another server. However, there are no VZ container snapshots being made. So, I have a full filesystem backup of ...
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1answer
31 views

Fastest way to remove numerous big files

I have a directory with integration tests temporary files, which has the following structure: TestTemp --- Test01 (~1.5TB) --- Subdirectory01 (~100GB) -- Destination JSON (1-100MB) ...
2
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1answer
109 views

Why can't a GPT partitioned disk on SATA be read on USB?

If I GPT partition a 4TB disk when it is connected to SATA, then it works fine. If I take the disk and put in the an USB3 enclosure, then I get [root@localhost liveuser]# sfdisk /dev/sdb sfdisk: ...
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2answers
80 views

how to backup partition layout?

How I can backup(and restore) partition layout of the Disk along with file system types,UUIDs,labels,LVM partitions(Linux LVM) etc, plus with MBRs and VBRs etc but without actual files I want to ...
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0answers
53 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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1answer
29 views

File system and file permission [closed]

Where does permission of a file reside. Is it attached to the file itself. I'm uploading a File to a different server. But there was some issue with the uploaded file. The guy who supported us for ...
0
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2answers
133 views

Cannot get ZFS pool created in OSX to import on Linux system [closed]

I'm experimenting with different file systems for use between a dual-booting Linux/OSX laptop which will act as a testing platform. Despite being a BSD variant, I've had a lot of trouble finding a ...
2
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2answers
55 views

Maintaining Linux file owner and group info in a multi-user system

I have a web application running on Linux (using CentOS 6) using a generic non-root user name, say app1. I've associated all the files under the folder /home/app1 with that user/group (using chown -R ...
0
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1answer
38 views

Storage Spaces: Will removing a used USB 3.0 retain the data in a 2-way mirror setup?

So I've just realized that the ReFS filesystem, although promising in a Storage Space solution, doesn't have certain NTFS features that I need. So I'm contemplating going back to NTFS. Problem is ...
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1answer
73 views

How to find out file path of file on a network share drive?

I am using a small .NET application which integrates a file into another application, however, I keep getting the following error in EventViewer (part of the .NET application): "The specified path, ...
2
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3answers
28 views

How can I modify the wtime of ext filesystem

How can I modify the superblock of an ext filesystem so that I can set the field wtime (Last write time)? I've tried with debugfs: debugfs 1.42.9 (4-Feb-2014) debugfs: open /dev/sdd2 -w debugfs: ...
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2answers
656 views

Change partition and / or mounting CentOS 6.5

I never did it before, please keep that in mind if I ask a beginner question now, but the info I've found on the internet weren't really useful for my case. df -h Filesystem ...
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0answers
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“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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2answers
48 views

parallel filesystem without SAN infrastructure

Is there any parallel filesystem that doesn't need SAN infrastructure ? What I want to do is to create a logical volume and attach it with multiple VMs that will use the disk concurrently.I don't want ...
0
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1answer
51 views

CDN and TTL on local EC2 files

I Have a file in CDN and I need a local copy of it in all of my EC2 instances. I like to set a TTL on the local copy of 5 minute, and have one of the following: Have it Fetch automatically as soon ...
0
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0answers
65 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 ...
0
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1answer
22 views

Unable to read some files on hard disk

Our server has two independent hard disks without RAID. One hard drive just for storing junk/temporary data where we generally delete temporary data using LRU algorithm. We have a 10k file in that ...
0
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0answers
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 ...
0
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0answers
33 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, ...
0
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1answer
137 views

PHP can't save sessions due to permission error

I know that this question must have been asked (and answered) before, but I can't find a solution for my problem in any of those questions. It's a bit odd... The problem is that my PHP scripts (and my ...
2
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1answer
70 views

Linux filesystem page cache - hot or not

How can you tell how much of the filesystem cache is hot (frequently accessed) or not? The use case would be determining when you are approaching the limits of your memory but before you actually hit ...
2
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1answer
108 views

Does changing /sys/block/sda/queue settings take effect immediately?

How long does it take for changes to the following settings to take effect: /sys/block/sda/queue/scheduler /sys/block/sda/queue/rotational /sys/block/sda/queue/read_ahead_kb Is it ...
4
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2answers
471 views

btrfs Integrity and Stress Testing

A DevOps colleague is recommending that we begin transitioning our production environment to using btrfs. We have primarily ext4 filesystems, though some low-usage servers using ZFS (on Linux). As ...
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1answer
1k views

Centos 5.5 [Read-only file system] issue after rebooting [closed]

I have a virtual server under centos 5.5 (hosted by a japanese company called sakura ) Since yesterday, connection through ssh couldn't be established. I've contacted support center who told me to ...
3
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1answer
120 views

Move, and split up, 5TB of data

Here is the scenario: I have 5 TB (yes, that's a T) of files on a Windows server that I need to migrate to a new server in as short and efficient time as possible. (Think: Robocopy, Rsync, etc as I ...
4
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4answers
81 views

Setting the noatime flag for filesystems inside an lxc container

My host filesystem is ext4 mounted with the noatime flag. But inside an lxc-container, the flag is absent. Here's the output of mount on the host: /dev/sdb1 on /home type ext4 (rw,noatime) And ...