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No mounting in single user mode

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Operating Systems Solaris No mounting in single user mode
# 1  
Old 02-11-2010
No mounting in single user mode
Hey all!

I recently aquired a Sun V210 running Solaris 10. I got past the firmware password, and now I'm trying to get past the root password. I booted directly into single user mode from the ok prompt "boot cdrom -s"

Once in.. every time I try to mount the harddrive "mount /dev/dsk/c0t0d0s0 /a" is says that the device is mounted. i try to unmount, it says it's busy. It never shows up in mnttab or vfstab. I tried a fsck and here are the results:
Code:
# fsck -y /dev/dsk/c0t0d0s0
** /dev/rdsk/c0t0d0s0 (NO WRITE)
BAD SUPERBLOCK AT BLOCK 16: MAGIC NUMBER WRONG
 
LOOK FOR ALTERNATE SUPERBLOCKS WITH MKFS?  no
 
LOOK FOR ALTERNATE SUPERBLOCKS WITH NEWFS?  no
 
SEARCH FOR ALTERNATE SUPERBLOCK FAILED.
 
USE GENERIC SUPERBLOCK FROM MKFS?  no

USE GENERIC SUPERBLOCK FROM NEWFS?  no
 
SEARCH FOR ALTERNATE SUPERBLOCKS FAILED. YOU MUST USE THE -o b OPTION
TO FSCK TO SPECIFY THE LOCATION OF A VALID ALTERNATE SUPERBLOCK TO
SUPPLY NEEDED INFORMATION; SEE fsck(1M).
  
# fsck -o b=16 /dev/dsk/c0t0d0s0
Alternate super block location: 16.
** /dev/rdsk/c0t0d0s0 (NO WRITE)
BAD SUPERBLOCK AT BLOCK 16: MAGIC NUMBER WRONG

Any jabs on how to get this drive mounted?

Thank you and I look forward to being an active member on this forum. Smilie
Last edited by Scott; 02-12-2010 at 03:21 AM.. Reason: Please use code tags
# 2  
Old 02-12-2010
You are corrupting your drive..! fsck should be done on raw device /dev/rdsk not the logical device /dev/dsk.
And by the way what is df -k and echo |format
?
make sure you're in /root directory then you give your mount /dev/rdsk/c0t0d0s0 /mnt
# 3  
Old 02-12-2010
Check with the mount command that where the root disk is mounted.
# 4  
Old 02-12-2010
Hi,

First try to find out the backup super block by giving command "newfs -N /dev/rdsk/cxtxdxsx" , which will show the filesystem parameters & backup super blocks. Then try executing the command "fsck -o b=xxxxx /dev/rdsk/cxtxdxsx " .
# 5  
Old 02-12-2010
This filesystem is already mounted, why do you want to mount it again ??
Running fsck on a mounted filesystem will do nothing but corrupt it.
# 6  
Old 02-12-2010
Quote:
Originally Posted by jlliagre
This filesystem is already mounted, why do you want to mount it again ??
Running fsck on a mounted filesystem will do nothing but corrupt it.
He booted through cdrom to single user mode Smilie
# 7  
Old 02-12-2010
Booting off a CD is always kind of a single user mode state. Anyway, if you read the first posting, you can see this:
Quote:
every time I try to mount the harddrive "mount /dev/dsk/c0t0d0s0 /a" is says that the device is mounted. i try to unmount, it says it's busy.
Solaris doesn't display these messages without a reason.
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