problems with GRUB>

[ujjal]

I am new to ubuntu 10.10 .I used xp and ubuntu parallely. Suddenly I found that,when I try to enter ubuntu, there is a black window where a grub command is being required like grub>
I can't enter on Ubuntu
I have read some posts about this problem but didnt get any solution.I dont want to reinstall ubuntu. So, please help me.


Thanks in advance

[Rubi1200]

Hi,

please do the following so we can see what is going on:

Boot the Ubuntu Live CD/USB. Choose the option "Try Ubuntu without any changes." Once the desktop loads come back here and do the following:

1. Download the boot info script. There is a link in my signature.
2. Once downloaded, move the boot info script to the desktop.
3. Open a terminal and run the command


sudo bash ~/Desktop/boot_info_script*.sh

This will create a RESULTS.txt file on the desktop. Paste the entire contents of that file back here in a new post. Once pasted highlight all text and click the # sign on the toolbar to place code tags around the text.

[3Miro]

Grub problems could be due to many things. Right before the grub> line, there should be an error message. What does it say?

[3Miro]

Hi,

please do the following so we can see what is going on:

Boot the Ubuntu Live CD/USB. Choose the option "Try Ubuntu without any changes." Once the desktop loads come back here and do the following:

1. Download the boot info script. There is a link in my signature.
2. Once downloaded, move the boot info script to the desktop.
3. Open a terminal and run the command


sudo bash ~/Desktop/boot_info_script*.sh

This will create a RESULTS.txt file on the desktop. Paste the entire contents of that file back here in a new post. Once pasted highlight all text and click the # sign on the toolbar to place code tags around the text.

cross post. This is a better way to diagnose the problem.

[ujjal]

Sorry for the late. It took too much time to boot. Here is the result.txt



Boot Info Script 0.55 dated February 15th, 2010

============================= Boot Info Summary: ==============================

=> Windows is installed in the MBR of /dev/sda

sda1: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files/dirs: /boot.ini /ntldr /NTDETECT.COM /wubildr.mbr /wubildr

sda2: __________________________________________________ _______________________

File system: Extended Partition
Boot sector type: -
Boot sector info:

sda5: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda5 starts
at sector 63.
Operating System:
Boot files/dirs: /ubuntu/winboot/wubildr.mbr /ubuntu/winboot/wubildr
/ubuntu/disks/swap.disk

sda6: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda6 starts
at sector 63.
Operating System:
Boot files/dirs:

sda7: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda7 starts
at sector 63.
Operating System:
Boot files/dirs:

sda8: __________________________________________________ _______________________

File system: vfat
Boot sector type: Fat32
Boot sector info: According to the info in the boot sector, sda8 starts
at sector 0. But according to the info from fdisk,
sda8 starts at sector 343276983.
Operating System:
Boot files/dirs:

sda9: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda9 starts
at sector 63.
Operating System:
Boot files/dirs:

sda10: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda10 starts
at sector 63.
Operating System:
Boot files/dirs:

=========================== Drive/Partition Info: =============================

Drive: sda ___________________ __________________________________________________ ___

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sda1 * 63 61,432,559 61,432,497 7 HPFS/NTFS
/dev/sda2 61,432,560 625,121,279 563,688,720 f W95 Ext d (LBA)
/dev/sda5 61,432,623 155,380,679 93,948,057 7 HPFS/NTFS
/dev/sda6 155,380,743 249,328,799 93,948,057 7 HPFS/NTFS
/dev/sda7 249,328,863 343,276,919 93,948,057 7 HPFS/NTFS
/dev/sda8 343,276,983 437,225,039 93,948,057 7 HPFS/NTFS
/dev/sda9 437,225,103 531,173,159 93,948,057 7 HPFS/NTFS
/dev/sda10 531,173,223 625,121,279 93,948,057 7 HPFS/NTFS


blkid -c /dev/null: __________________________________________________ __________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 00CCA083CCA07496 ntfs Xp
/dev/sda10 1448BAF248BAD22A ntfs Movies
/dev/sda2: PTTYPE="dos"
/dev/sda5 EA90442A90440015 ntfs Ubuntu
/dev/sda6 3830B02A30AFECD6 ntfs Softwares
/dev/sda7 88DC0E80DC0E68B0 ntfs Books & Photos
/dev/sda8 201E-E82A vfat CARTOON
/dev/sda9 861CAACB1CAAB599 ntfs Song
/dev/sda: PTTYPE="dos"

============================ "mount | grep ^/dev output: ===========================

Device Mount_Point Type Options

aufs / aufs (rw)
/dev/sr0 /cdrom iso9660 (ro,noatime)
/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sda10 /media/Movies fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_ permissions)
/dev/sda9 /media/Song fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_ permissions)


================================ sda1/boot.ini: ================================

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect
C:\wubildr.mbr = "Ubuntu"

[Rubi1200]

According to the results you installed Ubuntu using the Windows installer Wubi.

The problem is that you are missing the root.disk where all the essential files are stored.

This is what you can try; boot into Windows and enable the option to see hidden files and folders and then look for files named
found.000

If the root.disk is there, just copy it back to the main Ubuntu folder and you should be good again.

If you do not find it, please let us know.

[ujjal]

there is no file named "found.000" .Now what to do?

Thanks in advanced.

[Rubi1200]

I would try using the advanced search function in Windows. But, unless you made a backup you might have to reinstall.

Without the root.disk Wubi/Ubuntu will not work.

Do you have any idea what might have happened to cause this?

[ujjal]

Then what are you suggesting to me? Should I re install ubuntu?

[Rubi1200]

Hi ujjal,

If you are unable to find the root.disk then, yes, you have no choice but to reinstall.

However, before you do that have another look. Perhaps there is a file named found.001 etc.

What I am saying is that Windows has a built-in search function and you should enable its advanced features to try and find the root.disk.

Other than that, there is no way to fix this unless you happen to have made a backup copy of the root.disk.

Sorry I don't have better news for you.

[ujjal]

Got it .Thanks for your help. Please give answer of my questions about ubuntu.

1. After installing ubuntu should I make an backup on HDD?
ans: yes

2. XP / ubuntu
C / sda1
D / sda2
E / sda5
F / sda6
so on....? Am I right?

3.The problem I am facing [for which this thread is],when it will occure ? What are the precautions ?

4.Which is better between boot install and through wubi.exe ?

These questions may be simple but I am new to ubuntu and liked it.

[Rubi1200]

Hi,

let me try and answer some of your questions, but understand there are different approaches and my suggestions may not be the best for your situation. In the end, you need to decide what you want.

Backups; you should ALWAYS be backing up your data, whether it is in Windows or Linux

Wubi or a proper dual-boot install? Again, this is a personal decision. Wubi is great if you don't want to mess around with partitioning, bootloaders, and other such stuff. On the other hand, if you know you like Ubuntu and think you will use it at least 50% of the time, then a real install to the hard-drive is better.


The problem I am facing [for which this thread is],when it will occure ? What are the precautions ?
Not sure I understand what you mean here; are you talking about the problems with a Wubi install?


C / sda1
D / sda2
E / sda5
F / sda6
Is this the current layout of your drive or how you want it to look after partitioning?

You can only have 4 primary partitions, so in most cases you would either delete a partition and create an extended partition with a logical partition for Ubuntu or use Wubi, which doesn't have issues with 4 primary partitions unless the disks are dynamic.