A filesystem is a way to organize and store computer files with their data.

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tune2fs filesystem not clean

I've read in some forums that sometimes if you check tune2fs on a mounted device, it's OK that it says filesystem state: not clean. Can someone give me a complete explanation when this is true?
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Are the links between the inode and data blocks of a file removed when deleting the file?

Suppose there is only one hard link to a file. When rm the hard link, the inode and data blocks of the file will be marked as unused. But are the links from the inode to the data blocks of the file ...
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68 views

Untar a filesystem to device as normal user but maintaining the correct UID and GID

I'm doing quite a bit of development using Yocto to target an embedded system. As its final output, Yocto generates a tarball of the filesystem, which I then untar onto an ext4 partition of an SD ...
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43 views

Unable to perform any kind of operation on MircoSD card

I have a 8 GB SDcard that look like this in gparted: My goal is to have a single 8 GB partition on the SDcard. When I try to perform any operation (delete partition, create new partition, change ...
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36 views

New inode when mounting new file system

Does kernel really create any new inode when some file system gets mounted on some directory of root file system? I don't expect it to create as there is no new files are being created. Is there some ...
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268 views

Unable to mount UFS2 partition on Linux - ufs_fill_super(): bad magic number

In FreeNAS 9.3, I created a partition (slice?) by doing: fdisk -BI /dev/ada3 bsdlabel -wB /dev/ada3s1 newfs -O2 -U /dev/ada3s1a This drive is now /dev/sdg on Ubuntu 14.04, which I've been unable to ...
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130 views

How to run full SSD disk check with `fsck` command on system reboot (Debian)?

Please advice how to run full SSD disk check with fsck command on system reboot? (Debian) sdb2 is root, sdb1 is boot partitions. What is recommended options and where to find check report? I would ...
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29 views

Moved /var/log to a new logical volume now data is missing

I have a RHEL server that has /var mounted inside an LVG on its on dedicated LV. Per RH Security Advisory CCE-26215-4 I needed to migrate /var/log to its own dedicated partition. So I shrunk /opt to ...
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76 views

How to check UBIFS for errors?

My ARM system uses NANDFlash and UBIFS. IS there a command that will let me check the filesystem, report any errors or warnings, and also report the current compression level?
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54 views

Make ubi filesystem image from directories

I have a rootfs directory which contains all the directory structure (bin boot dev etc home ... var) to be installed on an embedded board . What I would like to accomplish, is to make a ubi image ...
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54 views

sysv and unknown partition table?

We have disk about 1985, It has a Unix.But we didn't know type of Unix.I did the following step : dd if=/dev/sdc of./all_of_disk.iso #sdc is the given disk Then : hexdump -C all_of_disk.iso > ...
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58 views

How do I find out hard disk model and serial number in amazon machine?

when check in local machine /proc/scsi/scsi file it contains Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: ST3160215AS Rev: 3.AA Type: Direct-Access ...
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355 views

To fix “Read-only File system” issue when SSH access to IP Camera

Currently I have a IP Camera, which allows the SSH access as root user. The build-in Shell is BusyBox 1.19.3 (but guess not relevant to this issue). There are a few directories, such as /bin, /root, ...
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45 views

How to install a system on top of ZFS?

I have a clear system with 5 hard drives, bios. No OS installed, no formatting applied to hard drives. I want to install a Scientific linux (6.6 or higher) OS on top of ZFS on it. What are the ...
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134 views

Recovering files with directory structure

EDIT: I am using Debian 8.1.0 So I somehow deleted my /etc directory. While I have not been able to recover the complete /etc directory hierarchy with all files, I have received different parts from ...
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36 views

How do I get new filesystem formats to use in mkfs?

I am currently attempting to run some benchmark tests using different filesystem formats. However, I can only use the ext family, cramfs, and msdos formats with mkfs since those are the only formats ...
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64 views

Ext3 Journaling Question on inode and disk layout

I was going through Journaling and JBD and wanted to ask you a very basic question for which I was not getting an answer: 1.Why Journal Inode number comes as 8 when we do ./dumpe2fs? 2.So far my ...
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95 views

Recursively lowercase, replace space and remove invalid characters on linux FS

I want to recursively run the following commands on a directory as part of a cron. The first line changes everything to lowercase, the second replaces spaces with _ and the third removes all invalid ...
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92 views

BTRFS - removing drive by devid instead of path

I recently lost a 5 TB drive using btrfs. I had a system freeze (unsure why) while a balance was running. My SMR drive got corrupted. I was able to mount my array degraded and balance my data. ...
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77 views

Difference between fsarchiver and dump

What is the difference between dump and fsarchiver? Are there features in dump which are not covered by fsarchiver? Can both backup to tape storage for example?
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597 views

usbfs: process 25093 (pool) did not claim interface 0 before use

I recently got a new phone, a Moto G 2nd Gen. I am running Debian Jessie on kernel 3.16.0-4-amd64 libmtp 1.1.8-1 libusb-1.0-0 2:0.1.12-1 gvfs 1.22.2-1 When I plug it in, it appears to be fine. ...
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34 views

Formatting btrfs for robust metadata

If I make three partitions on a HDD, it appears that the default (which is -m raid1) will only store two copies of each metadata block. Is there a way to store multiple copies, e.g. one on each ...
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shared filesystem with offline access

I would like a shared filesystem with offline access. I have two machines. One is a light laptop with a small amount of SSD storage that I carry with me. The other is a stay-at-home computer with much ...
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348 views

No space left on device, with 320 GB free

I'm a bit lost. I have a 500 GB external hard drive with its original filesystem still in place. The last command (dd writing to a file within this filesystem) failed with "no space left on device". ...
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193 views

fopen problem when mounting ecryptfs filesystem

After an unrecoverable fsck problem the mount of my encrypted /home/me filesystem isn't possible any more. The visible effects are: a) logging in though most of the selectable GUI window managers ...
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165 views

Home server bottleneck (filesystem server)

I am trying to set up a filesystem server, so that I can use my various laptops to transparently mount a directory containing many VirtualBox VMs, some of which run full graphics environments. I will ...
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174 views

Error file system check

I enabled the package e2fsprogs and always when the system starts it return the following error (when partition mounting): Jan 01 00:00:03 xxxx systemd[1]: Found device /dev/mmcblk0p3. Jan 01 ...
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233 views

Loopback (bind) mount automatically mounting additional ext4 USB drive

I have a USB (ext4) drive connected and it's registered in /etc/fstab. It mounts at /media/Backup fine. I want to mount a specific directory on that drive using a bind / loopback mount (this is ...
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151 views

ZFS datasets attribute inheritance

I have a ZFS filesystem on a Solaris system. In one pool I have an ISCSI share and an NFS share. zfs list tank 1,01G 2,88G 24,0K /tank tank/nfs 24,0K 2,88G ...
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132 views

Mount success but property of device mapper that dmsetup create is lost

I tried to create device mapper with dmsetup as followed: dmsetup create error_disk 0 20000 linear /dev/loop0 0 20000 1 error 20001 20959 linear /dev/loop0 20001 Then I check with command below: ...
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159 views

File of Doom freezes any computer that attempts interaction

I have a file on an internal server that causes any machine that interacts with it to immediately and irrecoverably freeze. By interaction, I mean just about anything: rm, mv, cp, cat, vi, gedit, ...
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How can I make a read-only Linux system (which uses unionfs) read/write for the duration of upgrades?

Assuming having an embedded linux application, and for protection against corruption from example abrupt power offs, you implement a read only system with union fs. But then, how is it possible to ...
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84 views

Is it possible to make a symbolic link of a file in other machine?

I have a account in a server and I would like have a symbolic link of some files in my local machine. How can I do this?
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29 views

NFS Block Size Open File

If I open an NFS file for the first time, what exactly is it that gets "downloaded"? Is it just file metadata and subsequent client requests will request individual blocks? Is it the whole file, or ...
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166 views

changing /var in running system

I have the challenge that I cannot start a CentOS Linux server in single-user-mode, but I need to change the /var (currently part of /) to a new disk. My way would be: mount the new disk on a ...
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316 views

Beaglebone: Backup image mounts root as Read-only

After I had completed creating applications for my BB white (running ubuntu), I created a backup of the SD card using-> sudo dd if=/dev/disk2 of=/Volumes/BONE/bone_custom.img Recently, I tried to ...
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257 views

How to use Reiser4 on Debian Wheezy?

Is there an easy way to use Reiser4 on Debian Wheezy? I installed reiser4progs but obviously I need a patched Kernel as well to use it. Is there some semi-officially maintained kernel to install ...
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81 views

How can I unveal files on my external hard drive?

I copied a big folder (around 110 GB) from my (Mac 10.7.5) computer onto a hard drive (exFAT). It took quite some time and afterwards I even checked that the files were actually there. After more ...
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89 views

How is default readahead value determined

I have two different devices running XFS and the default readahead value set differs between the two disks. Why is that ? How is the default size computed ? Is it device dependent ? I might also add ...
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462 views

Replacing default initramfs with my own

I followed this article to develop my own sample intramfs.cpio Now I have to put this in my kernel and compile. The procedure that I follw for petlinux is that I first run petalinux-config (and ...
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284 views

Citrix XenServer, all packages appear to be 32bit

I'm hoping to use Citrix XenServer for a group of 4/5 machines. One of these machines has 18TB of storage (after RAID5 is taken into account). I've installed XenServer and mkfs.ext3 is the only ...
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629 views

How to use fslint (in particular findnl) on the command line to actually mimic the behavior of the fslint-gui?

So I am trying the fslint tools. However, the help included in those tools as well as the man page don't indicate that the cleanup actions offered by the fslint-gui are also available through fslint ...
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31 views

What forms of discretionary access control are there?

I know it's kind of an unguided question, but just so I have a broader sense of how things are I was interested in getting a reasonably complete list of discretionary access controls available on Unix ...
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163 views

Optimization for an SSD?

I am running Fedora 20 on a Laptop ( Lenovo Ideapad Yoga 2 Pro ) with an SSD. My filesystem is LVM with ext4 as the format option. I am now running Fedora as the only OS on the system with Legacy BIOS ...
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231 views

How to blacklist bad blocks from a MD-raid + dm-crypt + ext4?

I have a ext4 partition, on top of a dm-crypt, on top of a MD-RAID 10. One partition (/dev/sdc1) dropped out of the array with a ton of read errors. I ran the manufacturer provided diagnostic tool ...
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Problem with openSUSE 12.3 dual-boot installation (with Windows 7)

I have a current Windows 7 64 bit installation that I'm using and I wish to create an openSUSE 12.3 partition on my HDD (not my SSD Windows drive). I used the Windows Disk Management tool to shrink my ...
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281 views

unionfs filesystem

I recently learned about unionfs and aufs and would like to put it to some real use. The scenario I have in mind is the following. Boot a machine with ubuntu on it which will serve as our base. Make ...
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202 views

How can I delete data from in a hexdump file from one offset to another?

I've created a disk image which was zeroed, formatted to ext4 file system, and then had several various files copied to it. I'm trying to extract these files using a combination of xxd and dd, but ...
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2k views

How to set up ZFS with ZIL and L2ARC SSD?

I have been considering bcache and flashcache. However my friend suggested me something called ZFS. In fact it says that formating disk with ZFS can actually do the exact same thing without kernel ...
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188 views

Directly convert Archbang live on a USB drive to one such with persistent file-system

I have installed Archbang 2012.12.03 from ISO image on my USB drive, now I have a USB drive with a live Linux installed on it but at end of every session and rebooting system I faced with a fresh ...