Why is “loop14” not listed in lsblk
Upon listing the blocks using lsblk
, I found 14 look blocks listed, from loop 0 to loop 13.
me@alpha:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 87.9M 1 loop /snap/core/5662
loop1 7:1 0 140.7M 1 loop /snap/gnome-3-26-1604/74
loop2 7:2 0 3.7M 1 loop /snap/gnome-system-monitor/57
loop3 7:3 0 140.9M 1 loop /snap/gnome-3-26-1604/70
loop4 7:4 0 34.6M 1 loop /snap/gtk-common-themes/818
loop5 7:5 0 42.1M 1 loop /snap/gtk-common-themes/701
loop6 7:6 0 89.5M 1 loop /snap/core/6130
loop7 7:7 0 2.3M 1 loop /snap/gnome-calculator/238
loop8 7:8 0 130.2M 1 loop /snap/gnome-3-28-1804/4
loop9 7:9 0 14.5M 1 loop /snap/gnome-logs/45
loop10 7:10 0 13M 1 loop /snap/gnome-characters/124
loop11 7:11 0 53.7M 1 loop /snap/core18/536
loop12 7:12 0 13M 1 loop /snap/gnome-characters/139
loop13 7:13 0 2.3M 1 loop /snap/gnome-calculator/260
sda 8:0 0 113G 0 disk
├─sda1 8:1 0 512M 0 part /boot/efi
└─sda2 8:2 0 112.5G 0 part /
However, when I list using ls /dev
and find blocks using grep 'loop'
, I found 15 blocks listed, with an extra loop14 shown.
me@alpha:~$ ls /dev | grep 'loop'
loop0
loop1
loop10
loop11
loop12
loop13
loop14
loop2
loop3
loop4
loop5
loop6
loop7
loop8
loop9
loop-control
Why loop14 is not listed from lsblk
?
devices lsblk
add a comment |
Upon listing the blocks using lsblk
, I found 14 look blocks listed, from loop 0 to loop 13.
me@alpha:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 87.9M 1 loop /snap/core/5662
loop1 7:1 0 140.7M 1 loop /snap/gnome-3-26-1604/74
loop2 7:2 0 3.7M 1 loop /snap/gnome-system-monitor/57
loop3 7:3 0 140.9M 1 loop /snap/gnome-3-26-1604/70
loop4 7:4 0 34.6M 1 loop /snap/gtk-common-themes/818
loop5 7:5 0 42.1M 1 loop /snap/gtk-common-themes/701
loop6 7:6 0 89.5M 1 loop /snap/core/6130
loop7 7:7 0 2.3M 1 loop /snap/gnome-calculator/238
loop8 7:8 0 130.2M 1 loop /snap/gnome-3-28-1804/4
loop9 7:9 0 14.5M 1 loop /snap/gnome-logs/45
loop10 7:10 0 13M 1 loop /snap/gnome-characters/124
loop11 7:11 0 53.7M 1 loop /snap/core18/536
loop12 7:12 0 13M 1 loop /snap/gnome-characters/139
loop13 7:13 0 2.3M 1 loop /snap/gnome-calculator/260
sda 8:0 0 113G 0 disk
├─sda1 8:1 0 512M 0 part /boot/efi
└─sda2 8:2 0 112.5G 0 part /
However, when I list using ls /dev
and find blocks using grep 'loop'
, I found 15 blocks listed, with an extra loop14 shown.
me@alpha:~$ ls /dev | grep 'loop'
loop0
loop1
loop10
loop11
loop12
loop13
loop14
loop2
loop3
loop4
loop5
loop6
loop7
loop8
loop9
loop-control
Why loop14 is not listed from lsblk
?
devices lsblk
add a comment |
Upon listing the blocks using lsblk
, I found 14 look blocks listed, from loop 0 to loop 13.
me@alpha:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 87.9M 1 loop /snap/core/5662
loop1 7:1 0 140.7M 1 loop /snap/gnome-3-26-1604/74
loop2 7:2 0 3.7M 1 loop /snap/gnome-system-monitor/57
loop3 7:3 0 140.9M 1 loop /snap/gnome-3-26-1604/70
loop4 7:4 0 34.6M 1 loop /snap/gtk-common-themes/818
loop5 7:5 0 42.1M 1 loop /snap/gtk-common-themes/701
loop6 7:6 0 89.5M 1 loop /snap/core/6130
loop7 7:7 0 2.3M 1 loop /snap/gnome-calculator/238
loop8 7:8 0 130.2M 1 loop /snap/gnome-3-28-1804/4
loop9 7:9 0 14.5M 1 loop /snap/gnome-logs/45
loop10 7:10 0 13M 1 loop /snap/gnome-characters/124
loop11 7:11 0 53.7M 1 loop /snap/core18/536
loop12 7:12 0 13M 1 loop /snap/gnome-characters/139
loop13 7:13 0 2.3M 1 loop /snap/gnome-calculator/260
sda 8:0 0 113G 0 disk
├─sda1 8:1 0 512M 0 part /boot/efi
└─sda2 8:2 0 112.5G 0 part /
However, when I list using ls /dev
and find blocks using grep 'loop'
, I found 15 blocks listed, with an extra loop14 shown.
me@alpha:~$ ls /dev | grep 'loop'
loop0
loop1
loop10
loop11
loop12
loop13
loop14
loop2
loop3
loop4
loop5
loop6
loop7
loop8
loop9
loop-control
Why loop14 is not listed from lsblk
?
devices lsblk
Upon listing the blocks using lsblk
, I found 14 look blocks listed, from loop 0 to loop 13.
me@alpha:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 87.9M 1 loop /snap/core/5662
loop1 7:1 0 140.7M 1 loop /snap/gnome-3-26-1604/74
loop2 7:2 0 3.7M 1 loop /snap/gnome-system-monitor/57
loop3 7:3 0 140.9M 1 loop /snap/gnome-3-26-1604/70
loop4 7:4 0 34.6M 1 loop /snap/gtk-common-themes/818
loop5 7:5 0 42.1M 1 loop /snap/gtk-common-themes/701
loop6 7:6 0 89.5M 1 loop /snap/core/6130
loop7 7:7 0 2.3M 1 loop /snap/gnome-calculator/238
loop8 7:8 0 130.2M 1 loop /snap/gnome-3-28-1804/4
loop9 7:9 0 14.5M 1 loop /snap/gnome-logs/45
loop10 7:10 0 13M 1 loop /snap/gnome-characters/124
loop11 7:11 0 53.7M 1 loop /snap/core18/536
loop12 7:12 0 13M 1 loop /snap/gnome-characters/139
loop13 7:13 0 2.3M 1 loop /snap/gnome-calculator/260
sda 8:0 0 113G 0 disk
├─sda1 8:1 0 512M 0 part /boot/efi
└─sda2 8:2 0 112.5G 0 part /
However, when I list using ls /dev
and find blocks using grep 'loop'
, I found 15 blocks listed, with an extra loop14 shown.
me@alpha:~$ ls /dev | grep 'loop'
loop0
loop1
loop10
loop11
loop12
loop13
loop14
loop2
loop3
loop4
loop5
loop6
loop7
loop8
loop9
loop-control
Why loop14 is not listed from lsblk
?
devices lsblk
devices lsblk
edited 47 mins ago
thephoenix01
402414
402414
asked 2 hours ago
AliceAlice
190110
190110
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
lsblk
lists loop devices with a backing file. In your case, loop devices 0-13 have backing files, and show up.
losetup --find
, used to find the next available loop device, automatically creates a new loop device if all existing loop devices are in use (if run as root). So some process might have run losetup --find
as root to look for an available loop device, and probably didn't use it.
Example:
I have seven loop devices, all backed:
$ sudo losetup --list --all
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop1 0 0 1 1 /var/lib/snapd/snaps/core_5897.snap
/dev/loop6 0 0 0 0 /tmp/foo
/dev/loop4 0 0 0 0 /tmp/foo
/dev/loop2 0 0 1 1 /var/lib/snapd/snaps/core_6130.snap
/dev/loop0 0 0 1 1 /var/lib/snapd/snaps/vuze-vs_3.snap
/dev/loop7 0 0 0 0 /tmp/foo
/dev/loop5 0 0 0 0 /tmp/foo
/dev/loop3 0 0 1 1 /var/lib/snapd/snaps/core_6034.snap
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop-control
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7
I ask losetup
for the next available loop device as root:
$ sudo losetup --find
/dev/loop8
And losetup
has created this for me:
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop8
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7 /dev/loop-control
But it's not in lsblk
:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 88.2M 1 loop /snap/core/5897
loop6 7:6 0 1M 0 loop
loop4 7:4 0 1M 0 loop
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.5M 1 loop /snap/core/6130
loop0 7:0 0 280.2M 1 loop /snap/vuze-vs/3
loop7 7:7 0 1M 0 loop
sda 8:0 0 41G 0 disk
└─sda1 8:1 0 41G 0 part /
loop5 7:5 0 1M 0 loop
loop3 7:3 0 89.5M 1 loop /snap/core/6034
Because it's not backed by anything usable as a block device.
add a comment |
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1 Answer
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1 Answer
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active
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active
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lsblk
lists loop devices with a backing file. In your case, loop devices 0-13 have backing files, and show up.
losetup --find
, used to find the next available loop device, automatically creates a new loop device if all existing loop devices are in use (if run as root). So some process might have run losetup --find
as root to look for an available loop device, and probably didn't use it.
Example:
I have seven loop devices, all backed:
$ sudo losetup --list --all
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop1 0 0 1 1 /var/lib/snapd/snaps/core_5897.snap
/dev/loop6 0 0 0 0 /tmp/foo
/dev/loop4 0 0 0 0 /tmp/foo
/dev/loop2 0 0 1 1 /var/lib/snapd/snaps/core_6130.snap
/dev/loop0 0 0 1 1 /var/lib/snapd/snaps/vuze-vs_3.snap
/dev/loop7 0 0 0 0 /tmp/foo
/dev/loop5 0 0 0 0 /tmp/foo
/dev/loop3 0 0 1 1 /var/lib/snapd/snaps/core_6034.snap
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop-control
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7
I ask losetup
for the next available loop device as root:
$ sudo losetup --find
/dev/loop8
And losetup
has created this for me:
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop8
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7 /dev/loop-control
But it's not in lsblk
:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 88.2M 1 loop /snap/core/5897
loop6 7:6 0 1M 0 loop
loop4 7:4 0 1M 0 loop
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.5M 1 loop /snap/core/6130
loop0 7:0 0 280.2M 1 loop /snap/vuze-vs/3
loop7 7:7 0 1M 0 loop
sda 8:0 0 41G 0 disk
└─sda1 8:1 0 41G 0 part /
loop5 7:5 0 1M 0 loop
loop3 7:3 0 89.5M 1 loop /snap/core/6034
Because it's not backed by anything usable as a block device.
add a comment |
lsblk
lists loop devices with a backing file. In your case, loop devices 0-13 have backing files, and show up.
losetup --find
, used to find the next available loop device, automatically creates a new loop device if all existing loop devices are in use (if run as root). So some process might have run losetup --find
as root to look for an available loop device, and probably didn't use it.
Example:
I have seven loop devices, all backed:
$ sudo losetup --list --all
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop1 0 0 1 1 /var/lib/snapd/snaps/core_5897.snap
/dev/loop6 0 0 0 0 /tmp/foo
/dev/loop4 0 0 0 0 /tmp/foo
/dev/loop2 0 0 1 1 /var/lib/snapd/snaps/core_6130.snap
/dev/loop0 0 0 1 1 /var/lib/snapd/snaps/vuze-vs_3.snap
/dev/loop7 0 0 0 0 /tmp/foo
/dev/loop5 0 0 0 0 /tmp/foo
/dev/loop3 0 0 1 1 /var/lib/snapd/snaps/core_6034.snap
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop-control
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7
I ask losetup
for the next available loop device as root:
$ sudo losetup --find
/dev/loop8
And losetup
has created this for me:
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop8
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7 /dev/loop-control
But it's not in lsblk
:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 88.2M 1 loop /snap/core/5897
loop6 7:6 0 1M 0 loop
loop4 7:4 0 1M 0 loop
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.5M 1 loop /snap/core/6130
loop0 7:0 0 280.2M 1 loop /snap/vuze-vs/3
loop7 7:7 0 1M 0 loop
sda 8:0 0 41G 0 disk
└─sda1 8:1 0 41G 0 part /
loop5 7:5 0 1M 0 loop
loop3 7:3 0 89.5M 1 loop /snap/core/6034
Because it's not backed by anything usable as a block device.
add a comment |
lsblk
lists loop devices with a backing file. In your case, loop devices 0-13 have backing files, and show up.
losetup --find
, used to find the next available loop device, automatically creates a new loop device if all existing loop devices are in use (if run as root). So some process might have run losetup --find
as root to look for an available loop device, and probably didn't use it.
Example:
I have seven loop devices, all backed:
$ sudo losetup --list --all
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop1 0 0 1 1 /var/lib/snapd/snaps/core_5897.snap
/dev/loop6 0 0 0 0 /tmp/foo
/dev/loop4 0 0 0 0 /tmp/foo
/dev/loop2 0 0 1 1 /var/lib/snapd/snaps/core_6130.snap
/dev/loop0 0 0 1 1 /var/lib/snapd/snaps/vuze-vs_3.snap
/dev/loop7 0 0 0 0 /tmp/foo
/dev/loop5 0 0 0 0 /tmp/foo
/dev/loop3 0 0 1 1 /var/lib/snapd/snaps/core_6034.snap
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop-control
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7
I ask losetup
for the next available loop device as root:
$ sudo losetup --find
/dev/loop8
And losetup
has created this for me:
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop8
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7 /dev/loop-control
But it's not in lsblk
:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 88.2M 1 loop /snap/core/5897
loop6 7:6 0 1M 0 loop
loop4 7:4 0 1M 0 loop
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.5M 1 loop /snap/core/6130
loop0 7:0 0 280.2M 1 loop /snap/vuze-vs/3
loop7 7:7 0 1M 0 loop
sda 8:0 0 41G 0 disk
└─sda1 8:1 0 41G 0 part /
loop5 7:5 0 1M 0 loop
loop3 7:3 0 89.5M 1 loop /snap/core/6034
Because it's not backed by anything usable as a block device.
lsblk
lists loop devices with a backing file. In your case, loop devices 0-13 have backing files, and show up.
losetup --find
, used to find the next available loop device, automatically creates a new loop device if all existing loop devices are in use (if run as root). So some process might have run losetup --find
as root to look for an available loop device, and probably didn't use it.
Example:
I have seven loop devices, all backed:
$ sudo losetup --list --all
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE
/dev/loop1 0 0 1 1 /var/lib/snapd/snaps/core_5897.snap
/dev/loop6 0 0 0 0 /tmp/foo
/dev/loop4 0 0 0 0 /tmp/foo
/dev/loop2 0 0 1 1 /var/lib/snapd/snaps/core_6130.snap
/dev/loop0 0 0 1 1 /var/lib/snapd/snaps/vuze-vs_3.snap
/dev/loop7 0 0 0 0 /tmp/foo
/dev/loop5 0 0 0 0 /tmp/foo
/dev/loop3 0 0 1 1 /var/lib/snapd/snaps/core_6034.snap
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop-control
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7
I ask losetup
for the next available loop device as root:
$ sudo losetup --find
/dev/loop8
And losetup
has created this for me:
$ ls /dev/loop*
/dev/loop0 /dev/loop2 /dev/loop4 /dev/loop6 /dev/loop8
/dev/loop1 /dev/loop3 /dev/loop5 /dev/loop7 /dev/loop-control
But it's not in lsblk
:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop1 7:1 0 88.2M 1 loop /snap/core/5897
loop6 7:6 0 1M 0 loop
loop4 7:4 0 1M 0 loop
sr0 11:0 1 1024M 0 rom
loop2 7:2 0 89.5M 1 loop /snap/core/6130
loop0 7:0 0 280.2M 1 loop /snap/vuze-vs/3
loop7 7:7 0 1M 0 loop
sda 8:0 0 41G 0 disk
└─sda1 8:1 0 41G 0 part /
loop5 7:5 0 1M 0 loop
loop3 7:3 0 89.5M 1 loop /snap/core/6034
Because it's not backed by anything usable as a block device.
answered 1 hour ago
OlorinOlorin
1,941719
1,941719
add a comment |
add a comment |
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