3TB WD AF[4096blks]Hdd ASUS P7P55d MoBo non-UEFI and 4GB ram.
I tried to install xp pro 64bit, but didn't complete because of Windoze not seeing the whole drive. I installed Ubuntu 14.10 LTS and used the whole drive as ext4, no other partitions. Worked for months.
After some kernel upgrade, seemingly automatic, I get a 'missing OS' error on boot and cannot mount the drive.
Using tools from LiveCd, PartedMagic and SysRescueCd, I find I had corrupt superblock, overlapping partitions, bad geometry and other errors. Searched the web for weeks now, trying every tip, trick and code until one suggested I fix my errors by changing to ext2 file system. I used the code and fubar'd my inodes and journal and filesystem.
Is it possible to change back to ext4 without further damage?
ubuntu@ubuntu:~$ sudo fdisk /dev/sda
The size of this disk is 2.7 TiB (3000592982016 bytes). DOS partition table format can not be used on drives for volumes larger than 2199023255040 bytes for 512-byte sectors. Use GUID partition table format (GPT).
ubuntu@ubuntu:~$ sudo fdisk -l /dev/sda
Disk /dev/sda: 2.7 TiB, 3000592982016 bytes, 5860533168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: dos Disk identifier: 0xa76529e9
Device Boot Start End Sectors Size Id Type /dev/sda1 * 505856 4295473150 4294967295 2T 83 Linux
sysrsccd gdisk -l output with lousy formatting GPT fdisk (gdisk) version 1.0.0
Partition table scan: MBR: MBR only BSD: not present APM: not present GPT: not present
Found invalid GPT and valid MBR; converting MBR to GPT format in memory.
Disk /dev/sda: 5860533168 sectors, 2.7 TiB Logical sector size: 512 bytes Disk identifier (GUID): EC4893A3-AD27-473D-931C-50C03164D378 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 5860533134 Partitions will be aligned on 2048-sector boundaries Total free space is 1565565806 sectors (746.5 GiB)
Number Start (sector) End (sector) Size Code Name 1 505856 4295473150 2.0 TiB 8300 Linux filesystem
Now I will try to type in the URL's that I have from a few days after the crash and today ( July19th)
Sorry about the mess.