Questions tagged [lsblk]
The lsblk tag has no summary.
134 questions
0
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1
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67
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Exclude non hotplug from lsblk output
I use the following command to show my hotplug devices:
lsblk --paths --output NAME,MODEL,TRAN,FSUSE%,UUID,HOTPLUG --exclude 7
To get the following rendering:
NAME MODEL ...
- 1,529
0
votes
1
answer
93
views
Determine used space of a block device with no filesystem
How can I determine used space of a block device that has no filesystem on it? If it helps, such device is managed via lvm.
I understand that the concept of "used space" on a device without ...
- 101
3
votes
2
answers
473
views
How can I use lsblk to display all devices except my root/main "sda" device where my root filesystem is "/"?
I use LUKS (so my system is encrypted) and LVM.
I don’t want sda displayed because that’s where my root filesystem lives, and it’s my root device. The solution should also work for systems without ...
- 10.1k
1
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0
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282
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Why doesn't lsblk list the drive where Windows 11 is installed? (I can boot into Windows, so I know the drive is functional)
I used dd to write the SystemRescue ( https://www.system-rescue.org/ ) image to a USB stick drive. I used this USB stick to boot into Computer#1 and then used dd to clone the internal system drive to ...
1
vote
2
answers
92
views
The ambiguous principles that guide the lsblk utility in removing duplicates of displayed records
Linux Mint 20.3
lsblk -V
lsblk from util-linux 2.34
Let's find an explanation for the ambiguous behavior of the lsblk utility applied with the -E option.
Here is the output without applying the -E ...
- 27
-1
votes
1
answer
71
views
The concept of holder in the context of the lsblk utility action
The description for the -d option of the lsblk utility says the following:
-d, --nodeps Do not print holder devices or slaves. For example, lsblk --nodeps /dev/sda prints information about the sda ...
- 27
2
votes
1
answer
98
views
lsblk can see all drives attached but udev only shows half of them. Conflicting indentifiers?
I'm trying to make a zfs pool on a terramaster D8 Hybrid DAS connected via USB with 4x HDD and 4x NVME drives using this guide. When i try to build the get the drive ids to build the zpool, not all of ...
- 21
0
votes
1
answer
66
views
how to provide the device name that related to LVM2_member
LVM2_member could be different according to device partition number
example
lsblk -f | grep LVM2_member | awk '{print $1}'
└─sda3
or on other redhat machine
lsblk -f | grep LVM2_member | ...
- 14k
2
votes
1
answer
130
views
fstab, mountpoint - what did I miss?
I can't figure out what I'm missing or done wrong.
lsblk dose not show the mount points(?)
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 1.8T 0 disk
└─sda1 8:1 ...
- 83
0
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0
answers
125
views
Block size output from lsblk and blockdev don't match
Why the output of LOG-SEC column and --getbsz in the following don't match? Are these values of different quantities? How to find actual values? And is the output of following stat command always ...
- 2,176
0
votes
1
answer
104
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Extending rootfs on centos
so I can see in lsblk that I have a 250G disk, but when I run pvresize /dev/sda3 I am not able to see the free space to extend the volume group.
Do I need to modify the partition table in single user ...
- 3
0
votes
1
answer
491
views
Subpartition inside partiton not showed in lsblk or /dev/
I installed archlinux inside my /dev/sdb4 and used the guided partition scheme. After install i can't mount /dev/sdb4 (ext4). The error was VFS: Can't find ext4 filesystem.
lsblk shows me:
sdb 8:...
- 88
0
votes
2
answers
269
views
Why the output of lsblk have almost the same lines?
lsblk -d -o NAME,SIZE,TYPE | grep disk
show me the such things
sda 894.3G disk
sdb 894.3G disk
sdc 3.7T disk
sdd 3.7T disk
nbd0 64G disk
Are the sda and sdc have sdb and sdd similarly ...
- 127
0
votes
1
answer
401
views
lsblk: Why FSSIZE is not equal to FSAVAIL + FSUSED
sudo lsblk --fs -o NAME,FSTYPE,SIZE,FSSIZE,FSUSED,FSAVAIL,FSUSE%,MOUNTPOINTS,LABEL,PATH | grep -v '^loop'
NAME FSTYPE SIZE FSSIZE FSUSED FSAVAIL FSUSE% MOUNTPOINTS LABEL ...
- 2,176
0
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0
answers
380
views
How to check how much space is available on block device disk (e.g not used on partition)
I have multiple block devices: e.g sda (sda1, sda2 & sda3).
sda3 is further divided into LVMs which all has a X amount of space on them. However, I want to be able to list how much space is ...
- 197
1
vote
1
answer
289
views
resize disk partition which is used by RAID
I need to shrink the sdb4 partition, which currently occupies the entire 7TB of my sdb drive, in order to create an sdb5 partition for my application. The challenge lies in the fact that there is a ...
- 11
-1
votes
1
answer
267
views
What are these empty 0B SIZE read-write loop devices?
What are these empty (0B SIZE) read-write loop devices?
sudo lsblk --all
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 0B 0 loop
loop1 7:1 0 0B 0 loop
loop2 7:2 ...
- 1,976
0
votes
1
answer
700
views
lsblk incorrect readonly
Hi I'm trying to detect ro filesystem mainly for root partition
This is portable system using usb as OS disk
The state is readonly, I cannot write anything
touch /tmp
touch: setting times of '/tmp': ...
- 101
0
votes
1
answer
135
views
Return the root partition name with lsblk or similar when the partition is encrypted
This is my lsblk output:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
nvme0n1 259:0 0 465.8G 0 disk
├─nvme0n1p1 259:1 0 512M 0 part /efi
├─nvme0n1p2 259:2 0 420G 0 ...
- 305
1
vote
1
answer
608
views
Is it safe to permanently remove swap in device with huge memory?
I have a desktop with 128G RAM. This is my typical memory usage when I am not running calculation-heavy scripts:
sam@debian:~$ free -ht --si
total used free shared ...
- 11
1
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0
answers
1k
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'lsblk' is not displaying the GPT partition label after formatting the disk
My lsblk is not showing gpt partition label for one disk partition, which was freshly formatted with
mkfs.ext4 -v -L MyLabel mydev
somehow the partition was not labeled properly afterwards. I didn't ...
- 1,924
2
votes
1
answer
129
views
Disk size is variable
I was flashing a new operating system to a device, but after the process was complete, I couldn't boot into it. I then checked the disk, and I noticed something strange.
Different tools report ...
- 123
0
votes
1
answer
2k
views
What is `nvme0n1p2` in `lsblk` command output? [duplicate]
In my Ubuntu 23.04 system, running lsblk gives the following output:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 4K 1 loop /snap/bare/5
loop1 7:1 0 55.6M ...
- 199
0
votes
2
answers
796
views
Unable to boot on centos 7
Since today, I cannot boot into my Linux CentOS 7. I am directly taken to emergency mode.
I have tried the following commands without success:
sudo umount /dev/sdb1 and sudo fsck -p /dev/sdb1
I have ...
- 185
0
votes
2
answers
1k
views
What is the issue with lsblk command in some server display full details and it is not other
What is the issue with lsblk command in some servers displaying full details and it is not others?
Examples:
Server 1
~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda ...
- 21
0
votes
2
answers
823
views
unable to find or mount sd card
I have a SD card that is giving me some trouble.
I followed some instructions from here https://forums.linuxmint.com/viewtopic.php?t=368230 and used the command
sudo dd if=/dev/zero of=/dev/sdb bs=1M ...
- 63
3
votes
1
answer
1k
views
How does lsblk obtain sector size?
My disk is sda. There is the size file /sys/dev/block/8:0/size. Its unit is sectors. When I run strace lsblk I can see it reading this file.
But how does lsblk get the sector size to later show the ...
- 1,022
2
votes
1
answer
2k
views
parted + is it correct to create disk partitions in Linux only by percentage
we want to create 2 partitions from each new disk by parted command
as the following example:
sdg 8:96 0 50G 0 disk
├─sdg1 8:97 0 25G 0 part
└─sdg2 ...
- 14k
0
votes
2
answers
1k
views
How do I find out what is the hard disk for OS in Linux
in our bash scripts , we have many places in the code that need to capture only the disk that related to OS ( operation linux/RHEL system )
we are using Linux versions as 7.2/7.5/7.6/7.9 , and on most ...
- 14k
1
vote
4
answers
3k
views
lsblk + how to print only the disks that are without filesystem
we want to print only the disks that are without filesystem by command line
from following example we can see that sde disk is without filesystem
lsblk -o NAME,FSTYPE
NAME FSTYPE
sda
├─...
- 14k
0
votes
0
answers
201
views
Why are uuid and ptuuid different for different commands
I get the following results for the 3 commands blkid, lsblk and sfdisk on an Arch Linux system
$ lsblk --json -p -b -o+PTUUID,UUID /dev/sda1
{
"blockdevices": [
{
"...
- 209
1
vote
1
answer
2k
views
wipefs + disk not cleaned
we erased the disk signature as the following ( this is after we performed umount )
wipefs -a /dev/sde
/dev/sde: 2 bytes were erased at offset 0x00000438 (ext4): 53 ef
then we check that disk is ...
- 14k
1
vote
4
answers
1k
views
How can I get the lsblk-devices that are NOT in use
root@pve-virt-01:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 250G 0 disk
├─sda1 8:1 0 1007K 0 part
├─sda2 8:2 ...
- 1,381
2
votes
1
answer
3k
views
fdisk or sfdisk + how to show the disks size in GIB and not in GB
we can print all disks by the following ( on our RHEL machine )
fdisk -lu | grep "Disk /dev"
Disk /dev/sda: 247.0 GB, 246960619520 bytes, 482344960 sectors
Disk /dev/sdb: 4294 MB, 4294967296 ...
- 14k
5
votes
3
answers
645
views
bash + how to compare arg to one of the disks in linux machine
I can capture the disk devices of my Linux machine with the following command:
lsblk -lnb | numfmt --to=iec --field=4 | grep disk | awk '{print $1}'
sda
sdb
sdc
sdd
In my bash script I used the line ...
- 14k
8
votes
2
answers
6k
views
How do I tell which partition I booted from?
Is there a way to know which partition you actually booted from?
fdisk -l reveals a "Boot" column that I definitely don't have on my NVME. Is this just legacy information?
Device Boot ...
- 83
0
votes
0
answers
278
views
How does it possible two hardware RAIDs in lsblk but one - in lspci?
lspci output:
Slot: 02:00.0
Class: RAID bus controller
Vendor: LSI Logic / Symbios Logic
Device: MegaRAID SAS 2208 [Thunderbolt]
SVendor: Dell
SDevice: PERC H710P Mini (for ...
- 127
0
votes
1
answer
854
views
RHEL 7.9 Help: Why do I get differences between lsblk and df
I have resized recently the rhel-root partition of my RHEL 7.9 system, basically I did the following commands:
pvresize /dev/sda2
lvextend -l+100%FREE /dev/rhel/root
I was able to resize the ...
1
vote
0
answers
489
views
How to get path of hardware RAID array in lsblk?
I detect list of hardware arrays by next command:
lspci -vmm | sed -E -n '/RAID bus|SCSI controller/,/^ *$/p' | tr -d '\t'
Example:
Class:RAID bus controller
Vendor:Broadcom / LSI
Device:MegaRAID SAS ...
- 127
7
votes
1
answer
12k
views
How to update/refresh changed partlabels as reported by lsblk?
On Linux, the command lsblk -o partlabel will display the partlabel for block devices.
I have used gdisk to change a partlabel.
After the change, lsblk is still reporting the old value of the ...
- 1,881
1
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0
answers
34
views
Size discrepancy between df -h output and lsblk output [duplicate]
When I run df -h and lsblk, on my Ubuntu 20.04.3 LTS Oracle Cloud instance, there is a discrepancy between sizes of my /dev/sda1 mount. I am not sure if this has to do with GiB vs GB or something else....
- 11
-1
votes
1
answer
2k
views
fdisk prints nothing and devices are not mounted
I am quite new to Linux, and I need to mount some devices, using the lsblk command and more.
lsblk presents the devices (internal, I don't have external ones) the output is:
# lsblk
NAME ...
- 1
1
vote
2
answers
1k
views
'dd' command disk copy retains old size
I recently upgraded my home server and wanted to increase my cloud disk to 2TB from 600gb. After some research I found the dd command which can fully copy a disk, which in my case seemed like a good ...
- 13
0
votes
2
answers
2k
views
lsblk size not adding up
I am using Ubuntu 20.04. when I do lsblk size is not adding up.
root@UbunutuTemplate-001:/home/tca# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 4K 1 loop /snap/bare/5
...
- 157
-2
votes
1
answer
1k
views
linux + from lsblk partitions size are greater then disk size
I get the following details from RHEL 7.2 machine , sda DISK is using LVM
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 250G 0 disk
├─sda1 8:1 0 500M 0 part /boot
├─sda2 8:2 0 199.5G 0 part
│...
- 14k
0
votes
0
answers
1k
views
How to access files in USB in linux
I'm using Ubuntu 20.04, recently (almost a week ago) I upgraded my kernel from 5.11.0 to 5.14.0 and after that I can't access any USB drivers.
The system recognises my USBs since when I run lsusb it ...
- 1
0
votes
0
answers
339
views
Drive not connecting after power outage
I have a raspberry pi with two external hard drives. the electricity went off today and after that i couldn't enter the rpi. what i ended up doing was to remove the flash card and enter it in another ...
- 1,766
0
votes
1
answer
959
views
Parse lsblk with jq
I am currently trying to parse the output of lsblk with jq and filters it based on some criteria.
Given the following example output:
{
"blockdevices": [
{
"name":...
- 193
5
votes
2
answers
9k
views
Can't see mounted drive under lsblk, blkid or mount
I have mounted an external hard drive via /etc/fstab with the following entry:
UUID=a8286fc9-5b08-41d9-8c4e-cb993a8976d1 /home/bu/safe-heaven-2/ ext4 defaults 0
I can read/write from this disk but I ...
3
votes
2
answers
1k
views
Does Linux update the size of a block device?
In the light of emmc wearout monitoring I'm wondering about the size as displayed inside a running Linux OS. An emmc chip has an internal manager which keeps track of the usage intensity of all the ...
- 83