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(swapper,1,1):ocfs2_fill_super:1039 ERROR: superblock probe failed!
VFS: Cannot open root device "sda1" or unknown-block(8,1)
Please append a correct "root=" boot option; here are the available partitions:
0800 244198584 sda driver: sd
0801 9767488 sda1 00000000-0000-0000-0000-000000000000
0802 19535040 sda2 00000000-0000-0000-0000-000000000000
0803 3903795 sda3 00000000-0000-0000-0000-000000000000
0804 210989677 sda4 00000000-0000-0000-0000-000000000000
0b00 1048575 sr0 driver; sr
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1)
Pid: 1, comm: swapper Not tainted 18.104.22.168 #3
[<ffffffff81aa213a>] ? printk+041/0x43
[<ffffffff8210fc54>] ? kernel_init+0x0/0x1e2
[<ffffffff8100370d>] ? kernel_thread_helper+0x0/0x10
This started randomly, I had not done any upgrades or changes. I have since tried reloading slackware from disk with no change. Lilo would not write to the mbr at the end of setup. sda1 is the root partition, sda2 is /usr, sda3 is the swap, and sda4 is /home. I'm out of ideas at this point and looking for some help.
trying to boot from a usb disk with /dev/sda1 as root produces the same panic. I formated that partition when I when through the reinstall process and ran a check at the same time so I don't think there is a physical problem with the disk.
I experienced a similar problem about a year ago with my tower PC, except that I was still able to boot from USB drives. What had happened in my case was that the motherboard's SATA controller had gotten confused owing to a faulty cable connection on one of the drives and, even after fixing the cabling, would not properly access the root drive.
Yes, I know that such problems should not theoretically happen, or at least should be recoverable by resetting the BIOS to its defaults; however, resetting the BIOS didn't fix things. Fortunately, I was able to remedy the problem by re-flashing the BIOS (booting the BIOS updater from a USB-connected DVD).
I only mention this as a last resort possibility to consider if all else fails (and assuming you have a means of re-flashing the BIOS).
I ran systemrescuecd and gparted did not recognize any filesystem on sda1 even though I reformatted it during the reinstall. I used gparted to set it back to ext4. I'm going to try the reinstall again.