I see lots of Input/Output errors when accessing the EFI/ubuntu directory, and
see a (bogus?) read only filesystem message in dmesg:
dmesg lines (probably caused by the ls command):
FAT-fs (sda2); error, fat_get_cluster: invalid cluster chain (i_pos 0)
FAT-fs (sda2): Filesystem has been set read only
But the mount command still lists the sda2 mount as rw.
The Input/Output error appears with any attempted access to the directory:
ls ubuntu, sudo mv ubuntu ..., sudo rm -rf ubuntu all produce the Input/Output
error.
I forget the error message from the third installation attempt, but it was a
failure
I expected and might have been the IO error (it was NOT the error window
produced from
the second installation attempt which apparently caused the corrupted
directory).
The error window on the second installation (to hard disk) was:
Window title: Unable to install Grub in a dummy
Text: Executing 'grub-install dummy' failed
This is a fatal error.
Since I fixed the bad directory, and I'm not really working on my own
UEFI machine, I'll hold off on doing anything more, like running the
grub-install. I hope this helps in improving things.
A guess as to what's wrong:
Looks like an "off-by-one" error on a loop index in grub install when it
encounters an existing EFI/ubuntu directory. The directory is probably
rewritten with an extra (free) block added at the start. The dosfsck reports
such in the below terminal capture. Confirm this by looking at the filesystem
image posted above.
The fix to get rid of the corrupted directory (since rm won't work) applying
Phillip's (comment #25) suggestion:
$ sudo mount -tvfat /dev/sda2 /mnt/sda2
ubuntu@ubuntu:/mnt/sda7/etc$ ls !$
ls /mnt/sda2
EFI
ubuntu@ubuntu:/mnt/sda7/etc$ sudo dosfsck -r /dev/sda2
dosfsck 3.0.13, 30 Jun 2012, FAT32, LFN
/EFI/ubuntu
Contains a free cluster (12149). Assuming EOF.
Reclaimed 277 unused clusters (1134592 bytes).
Perform changes ? (y/n) y
/dev/sda2: 326 files, 12146/65536 clusters
ubuntu@ubuntu:/mnt/sda7/etc$ sudo dosfsck -r /dev/sda2
dosfsck 3.0.13, 30 Jun 2012, FAT32, LFN
/EFI/ubuntu
Start does point to root directory. Deleting dir.
Reclaimed 276 unused clusters (1130496 bytes).
Perform changes ? (y/n) y
/dev/sda2: 326 files, 12146/65536 clusters
ubuntu@ubuntu:/mnt/sda7/etc$ sudo dosfsck -r /dev/sda2
dosfsck 3.0.13, 30 Jun 2012, FAT32, LFN
Orphaned long file name part "ubuntu"
1: Delete.
2: Leave it.
? 1
Perform changes ? (y/n) y
/dev/sda2: 325 files, 12146/65536 clusters
ubuntu@ubuntu:/mnt/sda7/etc$ sudo dosfsck -r /dev/sda2
dosfsck 3.0.13, 30 Jun 2012, FAT32, LFN
/dev/sda2: 325 files, 12146/65536 clusters
ubuntu@ubuntu:/mnt/sda7/etc$ ls /mnt/sda2/EFI
Boot Microsoft toshiba
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1090829
Title:
grub-efi fails to install with Input/output error
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/dosfstools/+bug/1090829/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
