09-07-2005
Lost Data Lost Admin
First time so excuse my ignorance please.
I may not be accurately describing the issue.
I have inherited a small lab mostly SUN V120s.
We lost power and are trying to recover.
Nope no backups...
The primary issue I have is 1 box is an Oracle Server.
It has 2 36Gb harddrives.
I am able to reboot the system but it will not mount a "meta device".
The vfstab file indicates a device mount of /dev/md/dsk/do on /oracle
There are several directories under root (e.g., /U01) that are linked to
/oracle.
Apparently this device according to the /etc/lvm/md.cf file looks like this:
d0 3 1 c1t0d0s4 \
1 c1t1d0s0 \
1 c1t1d0s1
I can see that this 'device' is using partitions from both harddrives
and I think the second harddrive (t1) has been trashed.
I know I am all over the board here, I am fairly new to
Solaris SysAdmin but I figured it couldn't hurt to try this
method for any help I can get.
Much obliged
murphsr
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LEARN ABOUT REDHAT
e2undo
E2UNDO(8) System Manager's Manual E2UNDO(8)
NAME
e2undo - Replay an undo log for an ext2/ext3/ext4 filesystem
SYNOPSIS
e2undo [ -f ] [ -h ] [ -n ] [ -o offset ] [ -v ] [ -z undo_file ] undo_log device
DESCRIPTION
e2undo will replay the undo log undo_log for an ext2/ext3/ext4 filesystem found on device. This can be used to undo a failed operation by
an e2fsprogs program.
OPTIONS
-f Normally, e2undo will check the filesystem superblock to make sure the undo log matches with the filesystem on the device. If they
do not match, e2undo will refuse to apply the undo log as a safety mechanism. The -f option disables this safety mechanism.
-h Display a usage message.
-n Dry-run; do not actually write blocks back to the filesystem.
-o offset
Specify the filesystem's offset (in bytes) from the beginning of the device or file.
-v Report which block we're currently replaying.
-z undo_file
Before overwriting a file system block, write the old contents of the block to an undo file. This undo file can be used with
e2undo(8) to restore the old contents of the file system should something go wrong. If the empty string is passed as the undo_file
argument, the undo file will be written to a file named e2undo-device.e2undo in the directory specified via the E2FSPROGS_UNDO_DIR
environment variable.
WARNING: The undo file cannot be used to recover from a power or system crash.
AUTHOR
e2undo was written by Aneesh Kumar K.V. (aneesh.kumar@linux.vnet.ibm.com)
AVAILABILITY
e2undo is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.
SEE ALSO
mke2fs(8), tune2fs(8)
E2fsprogs version 1.44.1 March 2018 E2UNDO(8)