Questions tagged [storage]

Use this tag to refer to any kind of data retention device (RAM, flash, hard disks, magnetic tape, punch cards, etc.), its means of separating pieces of information (files, blocks, sectors, etc.) or how to record and retrieve them. This is a very broad topic so selecting other tags relating to the medium (hard-drive, cdrom, etc.) or the format used on it (fat, ntfs, ext, f2fs, etc.) may help to identify it further.

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How does a utility 'fio' perform VFS like operations on raw unformatted devices with no filesystem on them?

I understand that one cannot do VFS operations on a medium with no filesystem. Given that, how does a utility like fio perform VFS-like read/write/seek operations on raw devices?
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Can VFS read/write operations be performed on an unformatted storage device in Linux?

As per my understanding, READ/WRITE etc are file system operations in linux. The file systems registers callbacks with the Kernel (VFS) and are in turn called by it when the particular FS is detected ...
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Should I use df or du to calculate space to use for partitioning?

I want to back up /home dir, but the sudo du -h /home | tail -n1 shows 22146824 /home however df -h shows: /dev/sda5 54G 22G 30G 42% /home 22*2^30 == 23622320128 The later number is ...
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Is there a way of “merging” NFS shares? [closed]

Currently , on the laboratory I'm working on, there are three NAS: 2x Seagate NAS Pro with 15TB (RAID 5) 1x FreeNAS machine with 9TB (RAID 0) All of these are used through NFS shares mounted on ...
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LVM: on simple raid1 with two legs Cpy%Sync never reaches 100% and always stays at 99.99%

On simple lvm raid1 with two legs Cpy%Sync never reaches 100% and always stays at 99.99%. lvm> lvs -a -o name,raid_sync_action,sync_percent LV SyncAction Cpy%Sync safe ...
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How to change journal attribute in Hitachi F900

To configure Hitachi Universal Replication, I need to change the journal attribute from initial to restore. How can I do this?
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Do file systems affect the available storage space?

I have heard some group discussing file systems (btrfs vs ext4 and something like that) to use in Linux on computers with less disk space (like 32GB ideapad, notebook etc.). Does the filesystem choice ...
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Clear unused space in KVM Virtual Machine

I have a sparse Virtual Machine. When I boot VM and df I get this /dev/sda1 98G 3.4G 90G 4% / When I check size of qcow2 image ls -sh 6.2G Image.qcow2 Image size should be 3.4G like used ...
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lun on raid 6 recoverable?

Raid 6 was on 8 drives, 2 failed. Qnap rebuilt the raid on 7 drives, raid rebuilt on new drives one at a time. That was a week ago and they've gone silent. Reaching out to see if anyone else can ...
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Flatpak taking too much storage

When I run flatpak list -d --app --runtime I see the following … … … Version Branch Arch Origin Installation Ref Active commit Latest commit ...
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restore data from internal storage of android phone

I am struggelling with the file recovery of an internal storage of an android phone. I made a dd copy of the /dev/sda device which includes the system and userdata and some other partitions of the ...
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To avoid wearing out SD card containing the OS, is it better to have two partitions on an external solid state drive (OS + storage)?

Just to say, I have posted this question on the Raspberry Pi stack exchange, but I think it is a general Linux question (at least on the basic level to which my own knowledge extends), and that people ...
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Reducing amount of data on remote server

I have a vague question.. which is hard to Google on, so using stackexchange might be more useful. The current situation is local computer: Ubuntu 16.04, not much storage space (~100 Gb) Remote ...
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How to partition the operating system with a small disk

I would like to know what partitioning scheme in RHEL7 is more recommended to configure on a server with little disk space where an Oracle 18c database will be installed. On the RedHat site they ...
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How to recover a file when sectors aren't in order

I had 2 files of the same format on a ext4 formatted flash memory (file1.imp and file2.imp). I accidentally deleted file2.imp. So after cloning the stick with dd, I am working on finding what blocks ...
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Swap content and partitions of two large drives without space to store both

I have a 512gb ssd which I use to store much of my backups and data, and also have a 1tb ssd which isn't being used much. I've been wanting to swap them, but I don't have another drive that is large ...
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Scalable and distributed file-system to store huge and fast growing number of small files

I need to store the the result of 50000+ websites crawl. I'm currently relying on 10 HDD in RAID6 on a single machine that physically stores files ( now 400.000.000 files that weight 50TB ) and an ...
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procedure with multipath and lvm - migrating to new storage array

I have an older redhat (5) server that needs to have 9 array filesystems moved to a new array. I'm seeking some assistance on the best way of doing this and how the process works. The data is being ...
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Unable to remove a storage device in Debian10

Until Debian 9, starting from 6 maybe, I usually removed storage devices (SATA consumer disks) by sending as root (after flushing buffers and unmounting fs): echo 1 > /sys/block/*device-name*/...
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Ubuntu server does not seem to detect external drive

So i have recently installed Ubuntu server on a machine. Which has all gone great the box is up and running and working as expected. The issue i face is that i have A 4tb external HDD that i wish to ...
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Isolate a software directories and files on a logical volume

I have a software that is installed under: /etc/software-name /var/log/software-name /opt/software-name Because the software downloads data, in time, the OS can remain without space. I want to ...
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how to automatically update files in linux usb masse storage

I successfully run this example of usb masse strorage class on my zc702 card (arm + FPGA) on linux : https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842264/Zynq-7000+AP+SoC+USB+Mass+Storage+...
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Why does 1GB disk show as 1073MB and not 1024MB?

fdisk -l output snippet showing disk /dev/sdd of 1GB size: fdisk -l Disk /dev/sdd: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 ...
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Linux still sees drive with old stats

I have Linux vm which is hosted on Hyper-V that has attached ISCSI drive over the network shared from NAS device. Last night I mounted the volume using mount /dev/sdb /mydrive pasted some files, ...
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How to set large disk to vagrant server?

I installed plugin as: vagrant plugin install vagrant-disksize Config Vagrantfile as: Vagrant.configure("2") do |config| config.vm.box = "centos/7" config.disksize.size = '80GB' config.vm....
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SSD is recognized by the fdisk and sfdisk after a secure erase operation

I have an SSD of type MTFDHAL800MCE from Micron technology. My system is based on Mint18 and it is installed on an HDD not the SSD. I connect to this system remotely using putty. Micron has provided a ...
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Copy Data in Uncompressed ZFS Filesystem to Another Compressed ZFS Pool

I have 300GB of data in ZFS filesystem tank/storage where compression is not enabled. tank is a mirror vdev made up of 2 drives sda and sdb and tank/storage is mounted to /storage. I want to know the ...
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RHEL 6.9 HA clustering issue with one node completely down

I have two node servers with SAN storage. Each node have RHEL 6.9 with HA and the partition are mapped from the storage using fiber cables with clustered resources. The thing is when the two nodes ...
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What does 'Not Supported' mean in the msecli reports?

A Micron MTFDHAL800MCE SSD is installed on my computer system and the OS is Linux Mint18. Micron has provided msecli for the management and configuration of the SSDs using specific commands on the ...
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Access USB device storage via terminal

For some reasons my Debian is broken and boots into a terminal based UI instead of the desktop. Where can I find my USB device storage directory in this terminal? Edit: It's not under /media.
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Using space available on a different disk

I am using a ubuntu vm on microsoft azure. I am facing a problem with creating new files and data being stored in database. It is throwing an error which says vm out of space. When i run df -h --total ...
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QNAP NAS internal storage size for booting Debian

I've just downloaded version 4.3.6 of QNAP QTS operating system. It seems to contain amd64 Linux kernel 4.2.8, initrd and root filesystem, glibc 2.21, Apache 2.4.37, PHP 5.6.38, no Perl, Python 2.7....
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In dm-cache, does the metadata volume need to be redundant?

I currently have a pool of hard drive storage in LVM, arranged such that each physical volume is an mdraid mirror device, so that I have full redundancy. Now, I'd like to add a SSD cache to this pool ...
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Nested LVM2 volumes

I have a hard disk which is the sole physical volume in an LVM2 volume group. The volume group contains a single logical volume, call it lv-host. I've then created a VMDK virtual disk using lv-host ...
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Sense Key : Aborted Command, Add. Sense: Nak received

When doing FIO test, I got: [sdb] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [sdb] Sense Key : Aborted Command [current] [descriptor] [sdb] Add. Sense: Nak received Does it mean the ...
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Understanding sync command operations in linux [closed]

I'm trying fully understand the sync command operations in linux OS. After reading: https://en.wikipedia.org/wiki/Sync_(Unix) https://lwn.net/Articles/457667/ I understood that sync command ...
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Delete last added “stuff” in specific timeframe

I have a major problem. On my HP Notebook with Linux Mint I had about 220 GB of storage. I only noticed that the fan is driving crazy although I had no application open but I didn't pay any attention ...
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Moving RAID5 to new system

I have a RAID5 with 3 drives currently running on a 14.04 install. Everything is ok, but the system is a bit underpowered. Therefore I have gathered together some new hardware and installed 18.04 on ...
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Expanding Debian system partition

I have a VM (with little space) running Debian 9 and a drive of 100 GB. I want to configure it as a LAMP web server. I followed a tutorial to mount that drive on /data, this is my partition table: $ ...
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What Exactly is the Difference among Direct, Buffered, Synchronous, and Asynchronous I/O?

I have studied lots of documents but I got a little bit confused. Can you please explain the difference or the relation between the direct I/O, buffered/non-buffered I/O, asynchronous and synchronous ...
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Running low on space; while deleting Mutt mail messages available space ran out, but mutt delete still succeeded, How?

Why did mutt still finish successfully? And while processing were we at risk of damaging anything? So we are running low on space 5GB available. Mutt for root is taking up 20GB on root partition, so ...
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653 views

KVM/QEMU/libvirt image path suggestion file system and mount options

As simple KVM server I've got to store raw and qcow2 images on special path like: /kvm-storage I want to know what's the best practices for file system and mount options to set this path for achieve ...
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/dev/md1 full, 486M /486M, hard drives are 3TB, can't install new packages

As the question says, this is happening. udev 7.8G 0 7.8G 0% /dev tmpfs 1.6G 196M 1.4G 13% /run /dev/md2 1007G 24G 932G 3% / tmpfs 7.9G 0 7.9G ...
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create directory ‘Folder’: No space left on device

I have a weird error. My website (in /var/www/html) is being unavailable every morning, i checked the logs and logs are empty. Then I tried to create a folder in home directory and it says: create ...
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1answer
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Why “Not enough space”-error on internet-browser launch? tmpdf?

For several applications I am getting a "Not enough space"-error which I wish to solve. Examble (My debian is in German): $ chromium [2595:2595:0805/143635.823734:ERROR:process_singleton_posix.cc(...
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how to run fio verify reliably in linux

I am using fio over disks exposed through iscsi. I am giving these params in fio fio --name=randwrite --ioengine=libaio --iodepth=64 --rw=randrw --rwmixread=50 --bs=4k-2M --direct=1 -filename=data --...
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2answers
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Fast way to get size of very large folders

I typically have to deal with folders (which contain subfolders) that are about 1 terabyte in size, and due to storage constraints, I need to remove folders often in order to stay within allotted ...
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1k views

Persistent disk name /dev/sd'x', changing with almost every reboot

I'm dealing with an issue for a few days now which start pulling my hair. Hopefully someone here has some ideas to get my issue fixed :-). I have a big storage server with 24x 3,5" drives. These ...
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check ssd from udevadm info

I have two peripherals(SSD and USB) connected to my system. Command: lsblk -S Output: NAME HCTL TYPE VENDOR MODEL REV TRAN sda 1:0:0:0 disk ATA xxxxxxxxxxxxxx 023 sata ...
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Report how much space is used and available in storage in ZFS on FreeBSD

When using ZFS on FreeBSD, how can we see how much space is used and how much is available in storage drives (hard disk, SSD, etc.)? For example, spinning up a virtual machine instance of FreeBSD on ...

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