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Questions tagged [storage]

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21 views

Expanding Debian system partition

I'm new at Linux and I don't understand how disk partition works, I have a VM with litle space with Debian 9 installed on it, and a drive of 100 Go, and I want to configure it as a LAMP web server. I ...
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0answers
20 views

Complex partition - volume term's dilemma

I'm struggling with some terms like disc, volume, partition. A [physical] partition is a section of a storage device, such as a hard disk drive or solid state drive. It is treated by the ...
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0answers
26 views

How to structure my Ubuntu installation and partitioning on SSD + HDD system

I have a laptop with 128GB SSD and 1TB HDD. I want to optimize my installation and plan for good partitioning. I have 16GB of RAM and I believe that is more than enough for my development work and I ...
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25 views

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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1answer
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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 ...
6
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1answer
67 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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1answer
43 views

/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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0answers
117 views

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 ...
3
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1answer
39 views

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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1answer
90 views

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
164 views

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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1answer
103 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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0answers
15 views

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 ...
6
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2answers
150 views

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 ...
1
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1answer
81 views

What's the difference between ledmon and ledctl?

Both are LED control tools released by Intel. https://linux.die.net/man/8/ledmon https://linux.die.net/man/8/ledctl What's their difference? Do I need ledmon to be executed first to run ledctl?
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1answer
43 views

Choosing best directories to compress and save disk space

What's the best way to estimate the compression level that can be achieved for a directory without storing the compressed files? I have a large amount of directories and sub-directories with files ...
1
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1answer
46 views

How to fix my storage drive to make it writable?

My computer has two drives, a boot drive and a storage drive and I'm running Ubuntu 18.04. However, for some reason my storage drive is unusable. $ ls '$RECYCLE.BIN' _SMSTaskSequence 'System ...
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2answers
250 views

Low disk space on “Filesystem root” 0 bytes disk remaining

I am struggling against disk space, regarding root location. Seems like I have reach 100% usage, and cannot find a way to regain space. I have used apg-get autoremove, apt-get clean, removed old ...
3
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2answers
132 views

Replicating an SD card

BACKGROUND An SD card has been configured for a Raspberry pi. The goal is to replicate the SD card exactly (OS, apps, data) so that the replica will function in a rPi exactly like the original \ ...
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1answer
35 views

How to fix or retrieve data from an NTFS partition that was (re-)formatted with gnome-disk?

This morning, as usual, I mounted a 622 GB Windows (NTFS) partition on Linux for use. When I went on to unmount it through the graphical disks tool on GNOME, I accidentally formatted it, and now it’s ...
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28 views

How much space does it require to install php, mysql and phpmyadmin on CentOS 7? [duplicate]

I use ovh.com self managed VPS. The plan name is 'VPS 2018 SSD 1'. It offers 2 GB RAM and 20 GB disk space. I have only php 5.5 installed. When I try to install phpmyadmin, it throws an error saying '...
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0answers
58 views

Unable to mount from the newly added second interface of a Ubuntu NFS server

I have a Ubuntu NFS server with single interface (just one IP address i.e 192.168.1.13) configured for both network and storage traffic. To avoid performance issues, I have got the second interface ...
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1answer
18 views

How machines agree on whether to use big or small endians?

I know how endians work. I read somewhere a statement "the internet, for instance, agrees on everything being big endians". How does that work? If I have a tcp connection between 2 machines, how do ...
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2answers
64 views

Find out which users are hogging the most disk space on our data server

We are supposed to store our ongoing projects on a rather small (~4TB) data server. Not surprisingly, it is constantly overflowing and people need to move off less recent files manually. Is there an ...
2
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0answers
29 views

Are released blocks logged in the journal for ext4?

Suppose we have a simple case: ext4 file system with journaling a single file named file, which has no other hard links the inode for file has associated with it only 1 data block My understanding ...
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1answer
23 views

Is it wrong to fill the reserved space in an external USB drive for archiving purposes?

I have been filling a hard drive and a couple of backup drives with the family pictures and videos. Once a video goes into the archive, it remains there in a folder correctly labeled with the date. ...
4
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1answer
542 views

ZFS on Linux: cannot destroy snapshot, dataset is busy

I'm trying to delete a bunch of old ZFS snapshots but I get errors saying that the datasets are busy: [root@pool-01 ~]# zfs list -t snapshot -o name -S creation | grep ^pool/nfs/public/mydir | xargs -...
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1answer
310 views

Hard drive - not seen by fdisk, not mounted but detected

I had hard drive which was target location for CCTV, connected to linux mini pc running rsync in background to collect footage from few locations. Well, I noticed that sometimes rsync failed due ...
2
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2answers
184 views

Fedora 29 — 500gb Hard Drive only storing 52.6gb

I have two hard drives on my laptop. One has 1tb with windows 10 and the other is 500gb (which I took from an old laptop) with fedora 29. When I went into the disk usage analyzer (DUA) on Fedora 29 I ...
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2answers
408 views

How to check that which storage connected either FC or iscsi

How do i check that, which type of storage are connected with my linux(Redhat) system. I want to find that either ISCSI or FC storage connect ?
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2answers
526 views

Unable to mount LV: “mount(2) system call failed: Structure needs cleaning,” but e2fsck says clean

I was trying to install an old optical drive into my system, which turned out to be having problems, so I pulled it out again, but upon rebooting back into Ubuntu 18.04, I'm unable to mount my 3-drive ...
1
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1answer
63 views

Can I use a Linux boot stick to check a windows system? [closed]

I have tried casper-rw and ext2. The following questions are where I'm at: Can I use a Linux boot stick to check the desktop windows partition for viruses and/or rootkits? If not, why? How is a ...
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0answers
19 views

problem installing curl [duplicate]

I am currently running kali linux(light, 64 bit) on a multiboot usb using YUMI and i'm trying to install curl but it needs additional storage, what should you suggest?
12
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5answers
2k views

Check data integrity after copying thousands of files [duplicate]

I copied thousands of files into an exFAT MicroSD card. The number of files and bytes is identical, but how do I know whether the data is corrupt or not? It would be good if the JackPal Android ...
0
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0answers
18 views

df -h inaccurate output [duplicate]

when I hit the command dh -h in my shell I'm confused why I get an inaccurate answer for / which is 29G. by inaccurate I mean the summation of avail which is 8G and Used which is 20G is 28G but the ...
1
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2answers
54 views

50GB /dev/sdb is filled with more than 250GB of files?

I migrated my vmware vcenter(26GB) over NFS on to /dev/sdb(50GB). [root@centos7~]# df -hT /dev/sdb Filesystem Type Size Used Avail Use% Mounted on /dev/sdb ext4 50G 26G 21G 56% /...
1
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1answer
264 views

PVS output not showing drive

I had created physical volume earlier i.e. /backup, /ndasdb, /processor, /latro. Don't know what exactly happened, but /ndasdb is not showing in any of this output result: Pvdisplay, Vgdisplay, and ...
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1answer
211 views

Oracle Linux 7 mounting SAN storage issue

I have a scenario where I am trying to mount SAN storage to my linux machine. My environment details are- Oracle VM manager for VM creation Fiber Channel HP3PAR SAN storage attached as physical disk ...
0
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1answer
25 views

Can I redirect block storage devices to each other?

Obviously what I'm about to describe is better handled by rsync or cp, but... Say I have two drives on my computer. Could I make one a perfect image of the other with the following command? Would ...
0
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0answers
23 views

ICH10: Large disk support?

I have a Fujitsu RX200 S5 server with an Intel ICH10 82801JI SATA controller that I'd like to use. However, I'm unable to find conclusive information about support for disks with 2 TByte and more. Are ...
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0answers
75 views

How to append a new disk to an existing folder

I have a server with a program which rapidly writes data to a folder. I attached a new disk to the server, mounted it and now I want it to expand or replace the folder with data. The program works ...
0
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1answer
83 views

How to delete centos update files that have been downloaded but not installed on a VM?

I have a centos 7 VM in VirtualBox that I'm using for development on an OSS project. I'm not worried about updates to the VM, but the VM has downloaded pending (important) updates and has now grown to ...
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0answers
157 views

How to back up two ZFS pools to a backup pool with regular snapshots and incremental send/recv

I'm running ZFS on my home studio machine. I have two pools: ssdtank - holding the operating system datasets, swap zvol etc. hddtank - holding user data I have a backup USB HDD that I want to use ...
1
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1answer
98 views

How to format a rogue flash drive? (GParted tries to touch file system footer beyond actual capacity, and freezes up indefinitely) [closed]

On a limbo-type fake USB or SD card, all sectors starting from a specific position on the drive are unavailable (zeroes only or ones only or unreadable sector response). A flash drive might indicate ...
0
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1answer
43 views

Unreadable block in multiblock reading on dd / ddrescue: How does it handle it?

Let's say that I set the block size of dd or ddrescue to 256K. A sector of flash drives usually has 512 bytes, a sector on optical data discs has 2048 bytes. Let's assume that in the next 256 KB, ...
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1answer
46 views

Are there any pitfalls to having a file-system directly on the hard disk with no partitions? [duplicate]

In Linux it's possible to format a non-system hard disk directly, without first putting any partitions on it. I've formatted a raw hard disk using mke2fs, creating an ext4 volume /dev/sda, rather ...
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2answers
90 views

ZFS magically vanishing available storage space

Running zfs on a system, and my root partition has been shrinking with seeming no explanation. I have now run out of space and can't find where it all went. A simple df shows the following (You can ...
2
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0answers
25 views

remote machine/cloud application storage for running software [closed]

I don't have a large SSD disk and every now and then I want to run a VM and I run out of storage, I want to run a nodejs project that for some reason needs an insane amount of storage for npm modules, ...
2
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2answers
283 views

List HBA information on Solaris 11 OS

Actually I want to know how can I see the Luns presented using a HBA WWN. The view that I want is something like this: LUN (on the server side like /dev/rdsk/...) | WWN (from the server) | Paths (...
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1answer
35 views

What is the relation between a line in cpu cache and a page in main memory (and block in disk)?

Computer Systems: A Programmer's Perspective (2nd Edition) [Randal E. Bryant, David R. O'Hallaron] says A block is a fixed-sized packet of information that moves back and forth between a cache and ...