Ubuntu

will not boot, OS not detected.

Asked by safrus

I installed ubuntu using live cd. Selected the option to use the entire drive for the installation. when i restart the computer the OS is not detected. primary drive is a SATA drive. more info below.

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot Start End Blocks Id System
/dev/sda1 1 9728 78140128+ 7 HPFS/NTFS

Disk /dev/sdb: 37.0 GB, 37019566080 bytes
255 heads, 63 sectors/track, 4500 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot Start End Blocks Id System
/dev/sdb1 * 1 4310 34620043+ 83 Linux
/dev/sdb2 4311 4500 1526175 5 Extended
/dev/sdb5 4311 4500 1526143+ 82 Linux swap / Solaris

title Ubuntu, kernel 2.6.20-15-generic
root (hd1,0)
kernel /boot/vmlinuz-2.6.20-15-generic root=UUID=6f1c4da5-e1ad-44b2-94d6-12fb93e30ade ro quiet splash
initrd /boot/initrd.img-2.6.20-15-generic
quiet
savedefault

title Ubuntu, kernel 2.6.20-15-generic (recovery mode)
root (hd1,0)
kernel /boot/vmlinuz-2.6.20-15-generic root=UUID=6f1c4da5-e1ad-44b2-94d6-12fb93e30ade ro single
initrd /boot/initrd.img-2.6.20-15-generic

title Ubuntu, memtest86+
root (hd1,0)
kernel /boot/memtest86+.bin
quiet

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safrus
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Revision history for this message
Sam Cater (wraund-deactivatedaccount) said : 		#1

hmm, there does not seem to be a problem with that grub, i cant see any problems. i take it you have tried loading into recovery mode.

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safrus (safrus) said : 		#2

i haven't really tried anything. this is my first attempt to abandon the evil addiction to microsoft

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safrus (safrus) said : 		#3

Alright, just an idea but again i know squat about linux. Looking at the code above it has hd1,0 for the boot? but linux is installed on the 36 gig sata drive which looks like its assigned as SDB1. Not really sure, any help is much appreciated.

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safrus (safrus) said : 		#4

Looking more into this. My bios lists my sata drive and the 3rd IDE master. 1st ide master is my 80gig hard drive and 2nd master/slave are my cd burners.

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Ralph Janke (txwikinger) said : 		#5

I would try if

root (hd2,0)

in the menu.lst file works then. Or run

sudo lshw -class disk

from the live CD. This should give you the order of physical ids as the linux kernel finds them.

I hope this helps

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Best safrus (safrus) said : 		#6

(hd0,0) in the menu.lst fixed the problem.

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Cosmicb (occultrush) said : 		#7

Start-up problem: "no boot/no OS/ no root", glitch...

Start-up problem: "no boot/no OS/ no root", glitch..?

While Gimp editing in 910.. a few pix I deleted, deleted very slowly..
The last re-edited pix of 30, just wouldn't save, so I rebooted..
On reboot, a pop-up read, "no operating system detected"... seems my hd has been hacked..?

I inserted the 910 install CD.. Install is blocked-out after keyboard option..
In blank page partitioner-window, only thing that works in partitioner-window is right click to "revert", then it goes back to live-desktop, but fails at partitioner again... In reboot, one line reads "no root..."

What can be done to the OS, when 910 won't boot-up, nor reinstall..?

Would pull the battery help, to allow reinstall if there's something hack-bad in the bios..?

It would be nice to get this OS running, so I don't lose the couple hours of edits...