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Old 11-12-2011, 06:20 AM   #1
theprince.munyaradzi
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grub recue unknown filesystem


i have a dual boo, windows 7 and linux mint11 on my notebook.it was working well until i just went to view the recovery environment and exi ted.since then i have just seen the message grub rescue unknown filesystem and the machine is not booting. How do i fix this? my school stuff is on the machine and i need it like now?

Last edited by theprince.munyaradzi; 11-12-2011 at 06:24 AM.
 
Old 11-12-2011, 09:28 AM   #2
yancek
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How did you view your Recovery environment? Did you boot the Recovery partition on windows 7? Did you mount the partition and view it from Mint? Do you have your Mint installation CD/DVD? You've messed up the Grub2 bootloader and will need to repair it. Is this "exi ted" a typo or random letters? If you have the Mint CD or any Linux CD, boot it and get the bootinfoscript, run it and post the results.txt output here.

http://bootinfoscript.sourceforge.net
 
Old 11-12-2011, 11:34 AM   #3
EDDY1
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Which recovery environment because if you went to wins7 recovery environment it would try to repair the boot loader, which would resut in wins7 being able to boot but not linux.
Are you seeing grub or is the machine booting to wins7?
 
Old 11-12-2011, 11:51 AM   #4
akuthia
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I think "exi ted" is "exited"
 
Old 11-13-2011, 07:44 AM   #5
theprince.munyaradzi
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hey guys here are the results of the bootinfo script.
Boot Info Script 0.60 from 17 May 2011


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

=> Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos8)/boot/grub on this drive.
=> Syslinux MBR (3.61-4.03) is installed in the MBR of /dev/sdb.

sda1: __________________________________________________________________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
============================ Drive/Partition Info: =============================

Drive: sda _____________________________________________________________________

Disk /dev/sda: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sda1 * 2,048 209,717,247 209,715,200 7 NTFS / exFAT / HPFS
/dev/sda2 209,717,248 241,174,527 31,457,280 1b Hidden W95 FAT32
/dev/sda3 241,176,574 488,361,983 247,185,410 f W95 Extended (LBA)
/dev/sda5 241,176,576 297,975,216 56,798,641 7 NTFS / exFAT / HPFS
/dev/sda6 297,975,808 349,640,703 51,664,896 83 Linux
/dev/sda7 349,642,752 353,816,575 4,173,824 82 Linux swap / Solaris
/dev/sda8 353,818,624 376,346,623 22,528,000 7 NTFS / exFAT / HPFS
/dev/sda9 376,348,672 488,361,983 112,013,312 7 NTFS / exFAT / HPFS
/dev/sda4 488,361,984 488,394,751 32,768 ef EFI (FAT-12/16/32)


Drive: sdb _____________________________________________________________________

Disk /dev/sdb: 987 MB, 987758592 bytes
31 heads, 30 sectors/track, 2074 cylinders, total 1929216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sdb1 * 135 1,929,215 1,929,081 c W95 FAT32 (LBA)


"blkid" output: ________________________________________________________________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 54E42E18E42DFD3C ntfs
/dev/sda2 5C2F-4355 vfat
/dev/sda5 1EB48129B481048D ntfs New Volume
/dev/sda6 6db8739b-535a-45fc-be28-2cc7f4401887 ext4
/dev/sda7 725372b9-c796-4530-9d57-7a1b6e1e53e0 swap
/dev/sda8 72CAD1C5CAD185AF ntfs New Volume
/dev/sda9 9868E2C168E29CEE ntfs New Volume
/dev/sdb1 150C-1518 vfat PENDRIVE

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sda1 /media/54E42E18E42DFD3C fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions)
/dev/sda5 /media/New Volume__ fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions)
/dev/sda6 /media/6db8739b-535a-45fc-be28-2cc7f4401887 ext4 (rw,nosuid,nodev,uhelper=udisks,commit=0,commit=600,commit=0,commit=0,commit=600,commit=0,commit=600 ,commit=0,commit=600,commit=0,commit=600)
/dev/sda8 /media/New Volume_ fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions)
/dev/sda9 /media/New Volume fuseblk (rw,nosuid,nodev,allow_other,blksize=4096,default_permissions)
/dev/sdb1 /cdrom vfat (rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)


========================== sda1/grldr embedded menu: ===========================

--------------------------------------------------------------------------------

=============================== StdErr Messages: ===============================

unlzma: Decoder error
/home/mint/Desktop/boot_info_script.sh: line 1888: ( / 2 ) + 16 : syntax error: operand expected (error token is "/ 2 ) + 16 ")
 
Old 11-13-2011, 09:43 AM   #6
yancek
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The output of the bootinfoscript you posted is only a small part of what it usually shows. It does show Grub in the master boot record and it indicates it is looking for /boot/grub files on sda8. That now shows as an ntfs partition and the only Linux partition on your drive is sda6 and the swap on sda7.

Do you still have the Mint installation CD? You should be able to mount the partition with grub and repair this if you do.
 
Old 11-13-2011, 09:52 AM   #7
theprince.munyaradzi
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i booted from a flash and BUT I DO NOT have the original.i have a new bootable flash which i am using. how do i do the grub repair
 
Old 11-13-2011, 10:55 AM   #8
Fred Caro
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grub

In answer to your direct question, at the grub prompt type 'update-grub' or the reverse.

Fred.
 
Old 11-15-2011, 04:56 AM   #9
theprince.munyaradzi
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sudo fdisk-l gives the following
sudo fdisk -l

Disk /dev/sda: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xf89f2357

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13055 104857600 7 HPFS/NTFS
/dev/sda2 13055 15013 15728640 1b Hidden W95 FAT32
/dev/sda3 15013 30400 123592705 f W95 Ext'd (LBA)
/dev/sda4 30400 30402 16384 ef EFI (FAT-12/16/32)
/dev/sda5 15013 18549 28399320+ 7 HPFS/NTFS
/dev/sda6 18549 21765 25832448 83 Linux
/dev/sda7 21765 22025 2086912 82 Linux swap / Solaris
/dev/sda8 22025 23427 11264000 7 HPFS/NTFS
/dev/sda9 23427 30400 56006656 7 HPFS/NTFS

Disk /dev/sdb: 987 MB, 987758592 bytes
31 heads, 30 sectors/track, 2074 cylinders
Units = cylinders of 930 * 512 = 476160 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 2075 964540+ c W95 FAT32 (LBA)

how do i proceed? i want to restore my system to the dual boot that used to work so well before.....
i would really appreciate it if anyone could give me the step by step commands i need to follow until the grub and my system ( the one operating on windows 7 starter and linux mint11 ) to its original state
 
Old 11-17-2011, 09:56 AM   #10
yancek
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It would work best if you had the original Mint CD/DVD since it has the same version of Grub. What do you have on your new bootable flash? Does it have a Linux version with Grub2? If so the following should work, if it doesn't have Grub2 this won't work so don't try it:
Boot the flash, open a terminal and run these commands consecutively:

sudo mkdir /mnt/sda6
sudo mount -t ext4 /dev/sda6 /mnt/sda6
sudo grub-install --root-directory=/mnt/sda6 /dev/sda

Not sure what you did int the Recovery so I don't really know if this will work but it is one of the standard methods for reinstalling Grub2.
 
  


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