I put all my hard drives (3 SATA -> 1TB, 320GB and 120GB and 2 IDE -> 40GB each) in a computer with my latest Sabayon installation and am trying to extract data. The disks all seem to be OK and the data appears to be intact.
I booted System Rescue Disk and Ultimate Boot CD in an attempt to boot from partitions on some of my hard drives but I failed at that because I think those OSes don't like my hardware. In the process I managed to trash the MBR of my Sabayon installation disk. I wasted several hours trying to fix that until I discovered that the Sabayon installation disk can repair it.
Once that was fixed, the next problem was that none of my file managers would let me access the partitions. pcmanfm lists the partitions (gnome-comander and mucommander don't) but says I am not authorized to mount them, even when it is launched as root. I will investigate this more for a solution later.
I mounted the partitions manually and prepared to extract my data. I plugged my USB external hard disk in and Sabayon would not recognize it.
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new high speed USB device number xxx using ehci_hcd
unable to enumerate USB device on port 3
repeats over and over.
After some research, I discovered a solution, disable ehci_hcd. Fortunately Sabayon has that loaded as a kernel module so:
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modeprobe -r ehci_hcd
removes it. The USB drive was now 'enumerated' and usable but it caused 2 very bad consequences. First it is pig slow running at USB 1.1 speed (it is taking an hour to burn a DVD with data from it and it is not even full) and my USB wifi adapter stopped working. It is not a slow drive, here are the specs:
Western Digital My Book Essential WDG1U2500N
USB 2.0, Capacity 250GB, 7200 RPM
Average Seek Time: 8.9ms
Average Latency: 4.2ms
I don't understand why I have to disable USB 2.0 to get a USB 2.0 device to work? This is a serious bug.
Next problem is with LVM. I have to disconnect my 300GBG drive to get Sabayon to boot. When the drive is connected, Grub gives an error
No such device 5b....
A big long number with 5 and b near its start, it wasn't on the screen long enough for me to copy it down. Then when it boots I see an error message
Failed to start LVM
It finishes booting and I get a text login screen but cannot login. I turn the computer off and disconnect the 320 GB HD. The next time the computer boots I get a kernel panic and it hangs.
I reboot and it boots normally (if I don't let it finish booting after the grub error and just turn it off, I never get the kernel panic).
I found this section in the grub.cfg file:
search --no-floppy --fs-uuid --set=root b5018f04-340e-49be-ad9a-5950a1cba0bf
if loadfont /usr/share/grub/unicode.pf2 ; then
# vga= is deprecated, grub2 handles this just fine
# making grub2 res == linux fb res
if sleep --interruptible 0 ; then
That long b5 number might be the one grub says "No such device" for.
I have not looked at the internal workings of grub for quite a while ( since the original grub before grub2) so the config file looks strange to me but the b5 device looks like it's the one Sabayon is installed on. I think the 320 GB drive has an earlier version of Sabayon on it so that may be confusing grub. The uuid numbers are randomly generated and possibly the 1 TB and 320 GB hard drives were assigned the same number.
Why I suspect that is because there is a logic puzzle game called Einstein and the solution to the 1st puzzle when you start the game is identical under Gentoo even several years ago and Sabayon today, the puzzles after that are random; however, when I play the game under Slackware the 1st puzzle's solution is always random. Gentoo might be doing something unusual with the system random number generator to cause that.
I think I will boot from a live DVD and wipe that 320 GB drive clean to see if that makes a difference.