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Hi, in your output of 'diskutil list' I see 3 EFI partitions (disk0s1, disk2s1, disk3s1). Disk3s1 is external disk, probably USB drive which you can disconnect before mounting EFI partition (if you do not boot from USB drive). In this case, the volume identifier of the EFI partition is disk0s1. Create a mount point. A mount point is a directory where a non-booted volume is mounted. On Mac OS X, mount points are typically created in /Volumes. We can create a directory called efi within /Volumes by running the following command: mkdir /Volumes/efi.
Mounting volumes on macOS can be done using Disk Utility.app. For some reason, Apple decided not to show EFI partitions (among others such as Preboot, Recovery, etc) in Disk Utility.app. In this article, I will show you how to mount these volumes using command line (Terminal).
Listing all volumes
To list all volumes (partitions), use diskutil list.
As you can see, there are 2 physical drives, both containing EFI partition.
If you compare it to Disk utility.app, it is rather brief.
Mounting a volume
To mount a volume, use sudo diskutil mount DiskIdentifier|DeviceNode|VolumeName.
This will mount the volume to /Volumes/<VolumeName>. If this mount point is already in use, a number will be added at the end (e.g: /Volumes/EFI 1).
The sudo command in the beginning is very import, omitting it causes error message like
Mounting a volume to specified mount point
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You can mount a volume to a different mount point (directory) using -mountPoint option. Beware, target mount point must exist.
Unmounting a volume
Unmounting a volume is as easy as mounting a volume, use diskutil umount DiskIdentifier|DeviceNode|VolumeName.
Hello All,
I have a new installation on new hardware. After some challenges, I had a desktop environment (E17) and some applications installed. I had transferred some personal files from my old computer to an external hard drive.
When I connected the external drive to my new computer and booted, the process was interrupted by the message:
[Failed] Failed to mount /boot/efi.
See 'systemctl status boot-efi.mount' for details.
Followed by several dependency failures, and then 'Welcome to emergency mode!' Following instructions on screen, I logged in and looked through journalctl. The point where everything goes bad is:
Here is some information about my setup:
What I have already tried:
1. disconnect external hard drive and reboot - same result
2. in emergency mode, #mount /dev/sda1 /boot/efi produces 'mount: unknown filesystem type 'vfat' '
3. booted with Arch CD - can mount /dev/sda1 /mnt/boot/efi
/dev/sda was partitioned with cgdisk, with /dev/sda1 being 512M, type EF00.
/dev/sda1 was formatted with mkfs.vfat -F32 /dev/sda1
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Any help is greatly appreciated!
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Last edited by dave.computer (2012-11-05 02:16:51)