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Top Forums UNIX for Dummies Questions & Answers recover DIsk and make bootable Post 77182 by larryase on Tuesday 5th of July 2005 02:29:31 PM
Old 07-05-2005
Sorry about not making it clear but here is the detail..

I have a Dell poweredge 2650 and it has 5 SCSI drive. The orginal I have drive 0 and 1 mirror and dive 2 and 3 mirror and drive 4 is just a straight SCSI. I have a dump level 0 of dive 0 and drive 2, which I would like to recover completely. The new drive I have are a little smaller and the RAID I have configured is different. Drive 0 is a plain volume while drive 1 and 2 are strips and drive 4 is the backup drive I'm restoring the drives from. I have manually partition the drives with fdisk to reflect the orginal partition table of the system. During fdisk I have also toggle the boot flag and made a boot partition on drive 0 which is where the orginal was kept.
Then I manually restore the dump level 0 from dive 4. Which restore OK. Then I change the /etc/fstab to reflect my new partition table and removed all mount point that may have been in the mtab. I have made the /boot and / partition as close to the orginal as possible. Now when I exit from rescue mode. I system will not boot (It does not even load drivers). It looks like a machine with no OS. It seems to not see the boot partition or the boot image. I have checked the permission and everything, but I'm lost as to why it won't boot.

Running RedHat AS3

THANKS ALL
Smilie
 

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mpartition(1)						      General Commands Manual						     mpartition(1)

Name
       mpartition - partition an MSDOS hard disk

Note of warning
       This  manpage  has been automatically generated from mtools's texinfo documentation, and may not be entirely accurate or complete.  See the
       end of this man page for details.

Description
       The mpartition command is used to create MS-DOS filesystems as partitions.  This is intended to be used on non-Linux systems, i.e.  systems
       where fdisk and easy access to Scsi devices are not available.  This command only works on drives whose partition variable is set.

       mpartition  -p drive mpartition -r drive mpartition -I [-B bootSector] drive mpartition -a drive mpartition -d drive mpartition -c [-s sec-
       tors] [-h heads] [-t cylinders] [-v [-T type] [-b begin] [-l length] [-f]

       Mpartition supports the following operations:

       p      Prints a command line to recreate the partition for the drive.  Nothing is printed if the partition for the drive is not defined, or
	      an inconsistency has been detected.  If verbose (-v) is also set, prints the current partition table.

       r      Removes the partition described by drive.

       I      Initializes the partition table, and removes all partitions.

       c      Creates the partition described by drive.

       a      "Activates" the partition, i.e. makes it bootable.  Only one partition can be bootable at a time.

       d      "Desactivates" the partition, i.e. makes it unbootable.

       If no operation is given, the current settings are printed.

       For partition creations, the following options are available:

       s sectors
	      The number of sectors per track of the partition (which is also the number of sectors per track for the whole drive).

       h heads
	      The  number of heads of the partition (which is also the number of heads for the whole drive).  By default, the geometry information
	      (number of sectors and heads) is figured out from neighbouring partition table entries, or guessed from the size.

       t cylinders
	      The number of cylinders of the partition (not the number of cylinders of the whole drive.

       b begin
	      The starting offset of the partition, expressed in sectors. If begin is not given, mpartition lets the partition begin at the  start
	      of the disk (partition number 1), or immediately after the end of the previous partition.

       l length
	      The  size  (length) of the partition, expressed in sectors.  If end is not given, mpartition figures out the size from the number of
	      sectors, heads and cylinders.  If these are not given either, it gives the partition the biggest	possible  size,  considering  disk
	      size and start of the next partition.

       The following option is available for all operation which modify the partition table:

       f      Usually,	before	writing  back  any  changes to the partition, mpartition performs certain consistenct checks, such as checking for
	      overlaps and proper alignment of the partitions.	If any of these checks fails, the partition table is not changes.  The	-f  allows
	      you to override these safeguards.

       The following options are available for all operations:

       v      Together with -p prints the partition table as it is now (no change operation), or as it is after it is modified.

       vv     If the verbosity flag is given twice, mpartition will print out a hexdump of the partition table when reading it from and writing it
	      to the device.

       The following option is available for partition table initialization:

       B bootSector
	      Reads the template master boot record from file bootSector.

See Also
       Mtools' texinfo doc

Viewing the texi doc
       This manpage has been automatically generated from mtools's texinfo documentation. However, this process is only  approximative,  and  some
       items, such as crossreferences, footnotes and indices are lost in this translation process.  Indeed, these items have no appropriate repre-
       sentation in the manpage format.  Moreover, not all information has been translated into the manpage version.  Thus I strongly  advise  you
       to use the original texinfo doc.  See the end of this manpage for instructions how to view the texinfo doc.

       *      To generate a printable copy from the texinfo doc, run the following commands:

		     ./configure; make dvi; dvips mtools.dvi

       *      To generate a html copy,	run:

		     ./configure; make html

	      A premade html can be found at: `http://mtools.linux.lu' and also at: `http://www.tux.org/pub/knaff/mtools'

       *      To generate an info copy (browsable using emacs' info mode), run:

		     ./configure; make info

       The  texinfo  doc looks most pretty when printed or as html.  Indeed, in the info version certain examples are difficult to read due to the
       quoting conventions used in info.

mtools-3.9.8							      02Jun01							     mpartition(1)
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