My machine is a desktop Ubuntu (no dual boot). The PC is unable to pass the Ubuntu screen at bootup. After a few mins, it falls back on a screen asking for the following: maintenance or reboot. I have 1Tb SSD drive. I removed all other secondary drives. When I run sudo fdisk -l, I get the following:
Device Start End Sectors Size Type
/dev/sda1 2048 1050623 1048576 512M EFI System
/dev/sda2 1050624 1052671 2048 1M Bios boot
/dev/sda3 1984313344 2051198975 66885632 31.9G Linux Swap
/dev/sda4 1052672 1984313343 1983260672 945.7G Linux filesystem
Then I run fsck /dev/sdaX with X=1,2,3 or 4. All partitions X=1,3,4 I get no error. But for fsck /dev/sda2, the output is:
ext2fs_open2: Bad magic number in super-block
fsck.ext2: Superblock invalid, trying backup blocks ...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sda2
The superblock could not be read or does not describe a valid ext2/ext3/ext4 filesystem….you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
or
e2fsck -b 32768 <device>
I am not sure what I should try: e2fsck -b 8193 /dev/sda? or e2fsck -b 8193 /dev/sda2
Thank you for any suggestions!
Best Answer
You have a serious error, so the best thing to do before you start is to make an identical copy of your SSD to another SSD or HDD larger or equal to your current size. CloneZilla Live is the easiest way to do that. If you make a mistake or something else goes wrong you'll have an up-to-date image to fall back to.
No? You want to live dangerously and totally mess up your system and lose all data??? OK, your choice! Just execute:
and if that fails:
because the hint is in the
<device>:/dev/sdais your SSD (device)/dev/sda1is the first partition on your first device.Oh, did I mention that if the second command fails, you have to restore your image and come back and ask a new question?