Unmount drive from emergency mode The 2019 Stack Overflow Developer Survey Results Are In Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)My new hard drive won't automount on bootThe disk drive for /media/SDbackup is not ready yet or not presentHard drive mounted at / , duplicate mounted hard drive after using MountManagermessed up with mount and naming a partition - delete a folder in file systemHow do I auto mount my partition?Need help fixing hard drive mountingautomount thumb drive own by rootExternal disk doesn't mount during bootError mounting system-managed device /dev/sdd1Automount a logical volume on an external disk drive LVM partitioned
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Unmount drive from emergency mode
The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)My new hard drive won't automount on bootThe disk drive for /media/SDbackup is not ready yet or not presentHard drive mounted at / , duplicate mounted hard drive after using MountManagermessed up with mount and naming a partition - delete a folder in file systemHow do I auto mount my partition?Need help fixing hard drive mountingautomount thumb drive own by rootExternal disk doesn't mount during bootError mounting system-managed device /dev/sdd1Automount a logical volume on an external disk drive LVM partitioned
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I am running Ubuntu 18.10. I tried reformatting my secondary HDD (Ubuntu is on an SSD) to ext4 and changed the /etc/fstab file to automount the drive on startup.
I must have done something wrong because now I can only boot into emergency mode.
By my logic the problem would be solved If I just unmounted the HDD and edited the fstab file of which I made a backup a while ago.
The problem is that I have no idea how to do that from emergency mode. None of the usual commands work.
EDIT2:
I just booted via USB-Stick and this is the (i guess faulty) fstab file:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda2 during installation
UUID=5ece23e7-beea-431d-9960-4ef8f83df532 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=0D53-953B /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
# 1TB DATA HDD:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
automount
asked Apr 10 at 20:42
EVARATEEVARATE
83
add a comment |
I am running Ubuntu 18.10. I tried reformatting my secondary HDD (Ubuntu is on an SSD) to ext4 and changed the /etc/fstab file to automount the drive on startup.
I must have done something wrong because now I can only boot into emergency mode.
By my logic the problem would be solved If I just unmounted the HDD and edited the fstab file of which I made a backup a while ago.
The problem is that I have no idea how to do that from emergency mode. None of the usual commands work.
EDIT2:
I just booted via USB-Stick and this is the (i guess faulty) fstab file:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda2 during installation
UUID=5ece23e7-beea-431d-9960-4ef8f83df532 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=0D53-953B /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
# 1TB DATA HDD:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
automount
asked Apr 10 at 20:42
EVARATEEVARATE
83
Could you post your fstab config, hard to say what you have done wrong if not know what you have done.
– Pasi Suominen
Apr 10 at 20:47
I don't understand why you would need to unmount a drive in order to change its fstab entry?
– steeldriver
Apr 10 at 21:03
Well my logic isn't flawless. Anyways, I booted from a USB stick an can access the fstab file. Is it safe to just remove the line? I will update my post in a second.
– EVARATE
Apr 10 at 21:12
... what you will need to do however is remount the drive on which the fstab file is located with rw enabled e.g.mount -o remount,rw /
– steeldriver
Apr 10 at 21:13
@steeldriver that won't work if they're booted to a Ubuntu Live USB :-)
– heynnema
Apr 10 at 21:19
add a comment |
I am running Ubuntu 18.10. I tried reformatting my secondary HDD (Ubuntu is on an SSD) to ext4 and changed the /etc/fstab file to automount the drive on startup.
I must have done something wrong because now I can only boot into emergency mode.
By my logic the problem would be solved If I just unmounted the HDD and edited the fstab file of which I made a backup a while ago.
The problem is that I have no idea how to do that from emergency mode. None of the usual commands work.
EDIT2:
I just booted via USB-Stick and this is the (i guess faulty) fstab file:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda2 during installation
UUID=5ece23e7-beea-431d-9960-4ef8f83df532 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=0D53-953B /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
# 1TB DATA HDD:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
automount
asked Apr 10 at 20:42
EVARATEEVARATE
83
I am running Ubuntu 18.10. I tried reformatting my secondary HDD (Ubuntu is on an SSD) to ext4 and changed the /etc/fstab file to automount the drive on startup.
I must have done something wrong because now I can only boot into emergency mode.
By my logic the problem would be solved If I just unmounted the HDD and edited the fstab file of which I made a backup a while ago.
The problem is that I have no idea how to do that from emergency mode. None of the usual commands work.
EDIT2:
I just booted via USB-Stick and this is the (i guess faulty) fstab file:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda2 during installation
UUID=5ece23e7-beea-431d-9960-4ef8f83df532 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=0D53-953B /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
# 1TB DATA HDD:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
automount
automount
asked Apr 10 at 20:42
EVARATEEVARATE
83
asked Apr 10 at 20:42
EVARATEEVARATE
83
edited Apr 10 at 21:19
EVARATE
asked Apr 10 at 20:42
EVARATEEVARATE
83
asked Apr 10 at 20:42
EVARATEEVARATE
83
asked Apr 10 at 20:42
EVARATEEVARATE
83
83
Could you post your fstab config, hard to say what you have done wrong if not know what you have done.
– Pasi Suominen
Apr 10 at 20:47
I don't understand why you would need to unmount a drive in order to change its fstab entry?
– steeldriver
Apr 10 at 21:03
Well my logic isn't flawless. Anyways, I booted from a USB stick an can access the fstab file. Is it safe to just remove the line? I will update my post in a second.
– EVARATE
Apr 10 at 21:12
... what you will need to do however is remount the drive on which the fstab file is located with rw enabled e.g.mount -o remount,rw /
– steeldriver
Apr 10 at 21:13
@steeldriver that won't work if they're booted to a Ubuntu Live USB :-)
– heynnema
Apr 10 at 21:19
add a comment |
Could you post your fstab config, hard to say what you have done wrong if not know what you have done.
– Pasi Suominen
Apr 10 at 20:47
I don't understand why you would need to unmount a drive in order to change its fstab entry?
– steeldriver
Apr 10 at 21:03
Well my logic isn't flawless. Anyways, I booted from a USB stick an can access the fstab file. Is it safe to just remove the line? I will update my post in a second.
– EVARATE
Apr 10 at 21:12
... what you will need to do however is remount the drive on which the fstab file is located with rw enabled e.g.mount -o remount,rw /
– steeldriver
Apr 10 at 21:13
@steeldriver that won't work if they're booted to a Ubuntu Live USB :-)
– heynnema
Apr 10 at 21:19
Could you post your fstab config, hard to say what you have done wrong if not know what you have done.
– Pasi Suominen
Apr 10 at 20:47
Could you post your fstab config, hard to say what you have done wrong if not know what you have done.
– Pasi Suominen
Apr 10 at 20:47
I don't understand why you would need to unmount a drive in order to change its fstab entry?
– steeldriver
Apr 10 at 21:03
I don't understand why you would need to unmount a drive in order to change its fstab entry?
– steeldriver
Apr 10 at 21:03
Well my logic isn't flawless. Anyways, I booted from a USB stick an can access the fstab file. Is it safe to just remove the line? I will update my post in a second.
– EVARATE
Apr 10 at 21:12
Well my logic isn't flawless. Anyways, I booted from a USB stick an can access the fstab file. Is it safe to just remove the line? I will update my post in a second.
– EVARATE
Apr 10 at 21:12
... what you will need to do however is remount the drive on which the fstab file is located with rw enabled e.g.
mount -o remount,rw /– steeldriver
Apr 10 at 21:13
... what you will need to do however is remount the drive on which the fstab file is located with rw enabled e.g.
mount -o remount,rw /– steeldriver
Apr 10 at 21:13
@steeldriver that won't work if they're booted to a Ubuntu Live USB :-)
– heynnema
Apr 10 at 21:19
@steeldriver that won't work if they're booted to a Ubuntu Live USB :-)
– heynnema
Apr 10 at 21:19
add a comment |
1 Answer
1
active
oldest
votes
If you mean Recovery Mode, and you can get to the # prompt, then type:
sudo mount -o rw,remount / # remount the disk rw
cd /etc # change directory
sudo pico fstab # to edit existing fstab
or, if you wish to restore your backup fstab:
sudo mv fstab fstab.bad # rename existing file, for safety
sudo cp fstab.backup fstab # restore backup fstab, use your own name
If you can't do any of this, then you'll have to boot to a Ubuntu Live DVD/USB, mount the HDD by using the Files (Nautilus) application, click on the HDD in the left pane, navigate to the /etc directory on the HDD, edit fstab, etc.
Update #1:
Make sure that /media/DATA mount point exists.
Change this line in fstab:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
to this:
UUID=7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults,nofail 0 2
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
And yes folks... I usedsudo... as some commands still require it, even in recovery mode...
– heynnema
Apr 10 at 21:17
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
@EVARATE change the last0 0to0 2so the drive will get checked at boot time, and addnofail, so the system will still boot if this drive is not available.
– heynnema
Apr 10 at 21:30
did that, thanks.
– EVARATE
Apr 10 at 21:36
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you mean Recovery Mode, and you can get to the # prompt, then type:
sudo mount -o rw,remount / # remount the disk rw
cd /etc # change directory
sudo pico fstab # to edit existing fstab
or, if you wish to restore your backup fstab:
sudo mv fstab fstab.bad # rename existing file, for safety
sudo cp fstab.backup fstab # restore backup fstab, use your own name
If you can't do any of this, then you'll have to boot to a Ubuntu Live DVD/USB, mount the HDD by using the Files (Nautilus) application, click on the HDD in the left pane, navigate to the /etc directory on the HDD, edit fstab, etc.
Update #1:
Make sure that /media/DATA mount point exists.
Change this line in fstab:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
to this:
UUID=7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults,nofail 0 2
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
And yes folks... I usedsudo... as some commands still require it, even in recovery mode...
– heynnema
Apr 10 at 21:17
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
@EVARATE change the last0 0to0 2so the drive will get checked at boot time, and addnofail, so the system will still boot if this drive is not available.
– heynnema
Apr 10 at 21:30
did that, thanks.
– EVARATE
Apr 10 at 21:36
add a comment |
If you mean Recovery Mode, and you can get to the # prompt, then type:
sudo mount -o rw,remount / # remount the disk rw
cd /etc # change directory
sudo pico fstab # to edit existing fstab
or, if you wish to restore your backup fstab:
sudo mv fstab fstab.bad # rename existing file, for safety
sudo cp fstab.backup fstab # restore backup fstab, use your own name
If you can't do any of this, then you'll have to boot to a Ubuntu Live DVD/USB, mount the HDD by using the Files (Nautilus) application, click on the HDD in the left pane, navigate to the /etc directory on the HDD, edit fstab, etc.
Update #1:
Make sure that /media/DATA mount point exists.
Change this line in fstab:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
to this:
UUID=7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults,nofail 0 2
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
And yes folks... I usedsudo... as some commands still require it, even in recovery mode...
– heynnema
Apr 10 at 21:17
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
@EVARATE change the last0 0to0 2so the drive will get checked at boot time, and addnofail, so the system will still boot if this drive is not available.
– heynnema
Apr 10 at 21:30
did that, thanks.
– EVARATE
Apr 10 at 21:36
add a comment |
If you mean Recovery Mode, and you can get to the # prompt, then type:
sudo mount -o rw,remount / # remount the disk rw
cd /etc # change directory
sudo pico fstab # to edit existing fstab
or, if you wish to restore your backup fstab:
sudo mv fstab fstab.bad # rename existing file, for safety
sudo cp fstab.backup fstab # restore backup fstab, use your own name
If you can't do any of this, then you'll have to boot to a Ubuntu Live DVD/USB, mount the HDD by using the Files (Nautilus) application, click on the HDD in the left pane, navigate to the /etc directory on the HDD, edit fstab, etc.
Update #1:
Make sure that /media/DATA mount point exists.
Change this line in fstab:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
to this:
UUID=7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults,nofail 0 2
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
If you mean Recovery Mode, and you can get to the # prompt, then type:
sudo mount -o rw,remount / # remount the disk rw
cd /etc # change directory
sudo pico fstab # to edit existing fstab
or, if you wish to restore your backup fstab:
sudo mv fstab fstab.bad # rename existing file, for safety
sudo cp fstab.backup fstab # restore backup fstab, use your own name
If you can't do any of this, then you'll have to boot to a Ubuntu Live DVD/USB, mount the HDD by using the Files (Nautilus) application, click on the HDD in the left pane, navigate to the /etc directory on the HDD, edit fstab, etc.
Update #1:
Make sure that /media/DATA mount point exists.
Change this line in fstab:
7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults 0 0
to this:
UUID=7264c768-09ca-4e0e-aeb7-018a3a25badb /media/DATA ext4 defaults,nofail 0 2
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
edited Apr 10 at 21:30
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
answered Apr 10 at 21:13
heynnemaheynnema
21.6k32361
21.6k32361
And yes folks... I usedsudo... as some commands still require it, even in recovery mode...
– heynnema
Apr 10 at 21:17
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
@EVARATE change the last0 0to0 2so the drive will get checked at boot time, and addnofail, so the system will still boot if this drive is not available.
– heynnema
Apr 10 at 21:30
did that, thanks.
– EVARATE
Apr 10 at 21:36
add a comment |
And yes folks... I usedsudo... as some commands still require it, even in recovery mode...
– heynnema
Apr 10 at 21:17
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
@EVARATE change the last0 0to0 2so the drive will get checked at boot time, and addnofail, so the system will still boot if this drive is not available.
– heynnema
Apr 10 at 21:30
did that, thanks.
– EVARATE
Apr 10 at 21:36
And yes folks... I used
sudo... as some commands still require it, even in recovery mode...– heynnema
Apr 10 at 21:17
And yes folks... I used
sudo... as some commands still require it, even in recovery mode...– heynnema
Apr 10 at 21:17
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Wait, did I just accidentally remove the UUID= ? That's embarrassing. Holy crap.
– EVARATE
Apr 10 at 21:22
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
Thanks man, that fixed it. I feel stupid now. Have a good day.
– EVARATE
Apr 10 at 21:25
@EVARATE change the last
0 0 to 0 2 so the drive will get checked at boot time, and add nofail, so the system will still boot if this drive is not available.– heynnema
Apr 10 at 21:30
@EVARATE change the last
0 0 to 0 2 so the drive will get checked at boot time, and add nofail, so the system will still boot if this drive is not available.– heynnema
Apr 10 at 21:30
did that, thanks.
– EVARATE
Apr 10 at 21:36
did that, thanks.
– EVARATE
Apr 10 at 21:36
add a comment |
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Could you post your fstab config, hard to say what you have done wrong if not know what you have done.
– Pasi Suominen
Apr 10 at 20:47
I don't understand why you would need to unmount a drive in order to change its fstab entry?
– steeldriver
Apr 10 at 21:03
Well my logic isn't flawless. Anyways, I booted from a USB stick an can access the fstab file. Is it safe to just remove the line? I will update my post in a second.
– EVARATE
Apr 10 at 21:12
... what you will need to do however is remount the drive on which the fstab file is located with rw enabled e.g.
mount -o remount,rw /– steeldriver
Apr 10 at 21:13
@steeldriver that won't work if they're booted to a Ubuntu Live USB :-)
– heynnema
Apr 10 at 21:19