I'm suddenly having big problems booting my System76 Wild Dog desktop unit. When I try to boot up, all I see is text flying by, way too fast to read. This continues until I press the front-panel "reset" button.
After hitting "reset," I've plugged in a live-USB flashdrive with a bootable Ubuntu-12.04 on it, and have been booting from that. (Using this flashdrive is the only way I've been able to boot over the last few days.)
"Disk Utility" on the flashdrive's Ubuntu, when I run that utility's "SMART Data -- View SMART data and run self-tests," says that my 1-terabyte, ext3-formatted HDD has 362 bad sectors. (I don't know how serious that is or isn't.) It also has a red warning at ID #5 "Reallocated Sector Count" where at right, it shows (in red) "Normalized: 92, Worst: 92, Threshold 36, Value: 362 sectors".
When I run Disk Utility's "Check Filesystem," it reports: "File system check on '15 GB Filesystem' (Partition 1 of ATA ST31000528AS) completed. File system is clean."
When I boot with the live-USB (/dev/sdb), I can mount both the root ( / ) and /home partitions of the disk (/dev/sda), and I can open and look at the files in both those partitions. (The disk has a 15GB root partition, an 8GB swapspace partition and a /home partition that takes up the rest of the 900-some GBs on the disk. I'm running Ubuntu 9.10 (Karmic) on this disk drive and want to get the drive to boot so I can fresh-install 12.04.3 LTS on it.)
At some point a few days ago I ran a terminal command (I forget which one) and got "The superblock could not be read" error message. So I went through the steps described here: https://linuxexpresso.wordpress.com/...ock-in-ubuntu/
sudo mke2fs -n /dev/sda1
I was shown nine different superblock backup numbers, and after running
sudo e2fsck -b <backup-number> /dev/sda1
on all nine of them (9 times, same command, different #), nothing had changed.
In other words every time I tried to re-boot without the flashdrive plugged in, I saw the GRUB menu first, then, below an Ubuntu logo, a thermometer bar moves left-right, left-right for a full minute or so, then the busybox-type black screen with the white text flying by.
I have a boot-repair report here: http://paste.ubuntu.com/6632700/
My question is, whether this is a superblock issue or not, how can I repair the disk so I can boot from it again?