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I'm using Ubuntu 14.10. Consider the following setup:

ubuntu@ubuntu:~$ sudo blkid
/dev/sdb1: UUID="0dde146f-ebdc-472d-83a2-48104e23cb8f" TYPE="swap" PARTUUID="00061e41-01" 
/dev/sdb5: UUID="ffead33a-4330-446a-9bca-760305c04453" UUID_SUB="4ce7b017-4ad1-4035-a72b-13a5e8b68c0c" TYPE="btrfs" PARTUUID="00061e41-05" 
/dev/sdb6: UUID="b6e06d19-6faf-4db2-b598-9d83433e853a" UUID_SUB="1e705a1e-aa40-49bd-a138-243eb0435b43" TYPE="btrfs" PARTUUID="00061e41-06" 
/dev/sdb7: UUID="7e486227-c36f-454c-ac3c-30aa61a54358" UUID_SUB="015cc2d2-2ee4-4420-83b1-22949a4ad97a" TYPE="btrfs" PARTUUID="00061e41-07"

/dev/sdb1 is the swap partition.

/dev/sdb5 is the root partition.

/dev/sdb6 is my home partition.

/dev/sdb7 is my data partition.

There used to be a /dev/sdb8 as well, which was located after /dev/sdb7, at the end of my hard drive. I deleted this partition using gparted, so it's not displayed here. This partition was encapsulated in one extended partition, called /dev/sdb2, along with the other partitions (except swap).

Since I removed /dev/sdb8, my system does not boot from the hard drive anymore. It loads the BIOS just fine, and it can run a USB pendrive (that's what I'm using right now, hence /dev/sdb instead of /dev/sda), but it won't even load Grub from the hard drive.

I wonder what's happening here. A simple grub-install /dev/sdb didn't help, nor did boot-repair.

When I start gparted, I'm getting an error message:

The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.

I think that this has something to do with my problem. I can click either Cancel or Ignore here, but clicking one of them does not make any difference.

How can I make Ubuntu boot again?

Exeleration-G
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  • I am pretty sure that gparted error is because it is looking at your USB flash stick, which you created with dd rather than the startup disk creator app. You say it won't even load grub, then what does it do? Finally, putting the boot repair info report in your question would be kind of helpful. – psusi Dec 17 '14 at 20:23
  • Hi, I checked with parted and you're probably right about the gparted error. When I boot, it passes the BIOS screen and then a message appears: Non-System disk or disk error replace and strike any key when ready. I pasted the boot repair info report here – Exeleration-G Dec 17 '14 at 21:59
  • Quick update: I decided to create a btrfs partition to fill up the empty space. I then ran boot-repair. Now, my system boots again. Still, I'd like to know how I can remove a btrfs partition without having boot problems. – Exeleration-G Dec 18 '14 at 15:14
  • Unless the partition is where your /boot or / filesystems are, you can just remove it. Also the point of btrfs is to combine all of your storage space, even across multiple drives, into one flexible pool managed under a single filesystem rather than partition it up into different ones. – psusi Dec 19 '14 at 00:10
  • The strange thing is, there was nog /boot or / there. Another strange thing is that replacing it with an empty partition was enough to get my system bootable again. – Exeleration-G Dec 19 '14 at 06:54

0 Answers0