Help - Partition Table problem - Lost access to extended partition 
Author Message
 Help - Partition Table problem - Lost access to extended partition

I have lost access to driver D (extended partition) of my 8Gb hard
disk.

The operating system is Win98 and the PC can boot and work on driver C
(active primary partition).

I suspect the data on D are all intact because there was not any long
crash and I need to get access again.

Now:
- FDISK shows both partitions
- FDISK /mbr did not get any result
- Sys c: from a recovery bootable rescue floppy disk did not get any
result
- in the Fe byte of first sector there is the signature 55AA

I want to use the Partition Manager utility of
http://www.*-*-*.com/
fix the problem.

I would really appreciate any help I can get to rescue my data.

Many thanks in advance.

Ciao,

Veronica
Italy

------------------------------------- Information about my MBR
--------------------

PARTINFO 1.07a
Copyright (C) 1996-2002, TeraByte Unlimited.  All rights reserved.

====================================================================
               MBR Partition Information (HD0):
+====+====+=============+====+=============+===========+===========+
| 0: | 80 |   1  1    0 |  b | 254 63  555 |        63 |   8932077 |
| 1: |  0 |   0  1  556 |  f | 254 63 1023 |   8932140 |   8916075 |
+====+====+=============+====+=============+===========+===========+
                         Volume Information
+----+----+-------------+----+-------------+-----------+-----------+
| 0: |  0 | 254 63 1023 |  f | 254 63 1023 |   8916075 |      1784 |
| 1: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 2: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 3: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
+----+----+-------------+----+-------------+-----------+-----------+
| 0: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 1: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 2: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 3: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
+----+----+-------------+----+-------------+-----------+-----------+
+----+----+-------------+----+-------------+-----------+-----------+
            MBR Partition Information (HD0) Continued:
+====+====+=============+====+=============+===========+===========+
| 2: |  0 | 254 63 1023 |  f | 254 63 1023 |  17848215 |      1784 |
+====+====+=============+====+=============+===========+===========+
                         Volume Information
+----+----+-------------+----+-------------+-----------+-----------+
| 0: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 1: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 2: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
| 3: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
+----+----+-------------+----+-------------+-----------+-----------+
            MBR Partition Information (HD0) Continued:
+====+====+=============+====+=============+===========+===========+
| 3: |  0 |   0  0    0 |  0 |   0  0    0 |         0 |         0 |
+====+====+=============+====+=============+===========+===========+
                           BOOT SECTOR INFORMATION
-------------------------------------------------------------------------------
File System ID: 0xB   LBA: 63  Total Sectors: 8932077
                          Jump: EB 58 90 (EB 58 90)
                      OEM Name: MSWIN4.1 (MSWIN4.1)
                 Bytes Per Sec: 512 (512)
                 Sec Per Clust: 8 (8)
                   Res Sectors: 32 (32)
                      Num FATs: 2 (2)
                 Root Dir Ents: 0 (0)
                       Sectors: 0 (0)
                         Media: 0xF8 (0xF8)
                  Secs Per FAT: 0 (0)
                 Sec Per Track: 63 (63)
                         Heads: 255 (255)
                   Hidden Secs: 63 (63)
                  Huge Sectors: 8932077 (8932077)
             Huge Secs Per FAT: 8715 (8715)
                         Flags: 0x0 (0x0)
                       Version: 0 (0)
                Root Dir Clust: 2 (2)
                   FS Info Sec: 1 (1)
                   FS Bkup Sec: 6 (6)
                      Reserved:  0  0  0  0  0  0
                     Drive Num: 0x80 (0x80)
                           Res: 0x0 (0x0)
                      Boot Sig: 0x29 (0x29)
                        Vol ID: 0x251E13E0 (0x251E13E0)
                  Volume Label: NO NAME     (NO NAME    )
                       FS Type: FAT32    (FAT32   )
                     Boot Flag: 0xAA55 (0xAA55)
-------------------------------------------------------------------------------

Ranish Partition Manager       Version 2.43 (beta) by Muthu   Apr 09,
2002

HD 1 (128)  8,715M [  1,111 cyls x 255 heads x 63 sects =  17,849,999
sects ]

                   File                Starting         Ending    
Partition
   # Type Row   System Type         Cyl Head Sect    Cyl Head Sect
Size [KB]

   0  MBR   Master Boot Record        0    0    1      0    0    1    
     0
   1  Pri   Unused                    0    0    2      0    0   63    
    31
   2 >Pri 1 Windows FAT-32            0    1    1    555  254   63
4,466,038
   3  Pri 2 Extended LBA            556    0    1  1,110  254   63
4,458,037
   4  ? Log Unused                  556    1    1  1,110  254   63
4,458,006
   5  Pri 3 Extended LBA          1,111    0    1  1,111   28   20    
   892
   6  ? Log Unused                1,111    1    1  1,111   28   20    
   860

Partition table details:

                    Starting       Ending     Starting   Number of    
 Ending
   # Type R FS    Cyl Head Sct  Cyl Head Sct    sector     sectors    
 sector

   0  MBR   FF      0   0  1      0   0  1           0           1    
      0
   1  Pri   00      0   0  2      0   0 63           1          62    
     62
   2 >Pri 1 0B      0   1  1    555 254 63          63   8,932,077  
8,932,139
   3  Pri 2 0F    556   0  1  1,110 254 63   8,932,140   8,916,075
17,848,214
   4  ? Log 00    556   1  1  1,110 254 63   8,932,203   8,916,012
17,848,214
   5  Pri 3 0F  1,111   0  1  1,111  28 20  17,848,215       1,784
17,849,998
   6  ? Log 00  1,111   1  1  1,111  28 20  17,848,278       1,721
17,849,998

Partition records exactly as they appear in MBR (EMBR):

                   Starting          Ending        Starting   Number
of
    #  HD  FS    Cyl Head Sect    Cyl Head Sect      sector    
sectors
(0,0,1):
    1  80  0B      0    1    1    555  254   63          63  
8,932,077
    2  00  0F    556    0    1  1,023  254   63   8,932,140  
8,916,075
    3  00  0F  1,023  254   63  1,023  254   63  17,848,215      
1,784
    4  00  00      0    0    0      0    0    0           0          
0
(556,0,1):
    1  00  0F  1,023  254   63  1,023  254   63   8,916,075      
1,784
    2  00  00      0    0    0      0    0    0           0          
0
    3  00  00      0    0    0      0    0    0           0          
0
    4  00  00      0    0    0      0    0    0           0          
0
(1111,0,1):
    1  00  00      0    0    0      0    0    0           0          
0
    2  00  00      0    0    0      0    0    0           0          
0
    3  00  00      0    0    0      0    0    0           0          
0
    4  00  00      0    0    0      0    0    0           0          
0

Detailed information about each partition:

--- Partition 2 ---
Type: Windows FAT-32         CHS=(0,1,1)  4,466,038 k  8,932,077
sectors

      Volume Label: NO NAME    
         System id: MSWIN4.1
       File system: FAT32  
      Cluster size: 4k (8s)
          FAT size: 4,357k
      Drive number: 128   Exp: 128
   Starting sector: 63
    Expected value: 63
 Number of sectors: 8,932,077
    Expected value: 8,932,077



Thu, 07 Oct 2004 04:51:49 GMT  
 Help - Partition Table problem - Lost access to extended partition

<snipped>

Take a look at:

http://inet.uni2.dk/~svolaf/utilities.htm

As there are a number of tools on this site that can help you.

Also, check out the thread under this post:

http://groups.google.com/groups?hl=en&selm=ead2e550.0203070037.5cf9c6...

I had the same problem a while back, so you could try the method
suggested as well.

Good luck.

Dazz

I hear stories from the chamber
How Christ was born into a manger
And like some ragged stranger
Died upon the cross
And might I say
It seems so fitting in its way
He was a carpenter by trade
Or at least that's what I'm told

The Mercy Seat - Nick Cave and the Bad Seeds



Thu, 07 Oct 2004 07:10:40 GMT  
 Help - Partition Table problem - Lost access to extended partition
Thorsten Glaser attached:

Quote:
> Veronica scribed:
> >I have lost access to driver D (extended partition) of my 8Gb hard
> >disk.
[ snip ]
> Change this "f" to "b", "c" or "e" and reboot from the Windows 98
> start disc. If a drive D exists and is hard disc, format it.

"Format it"?

I think Veronica wanted to try to retain whatever she could from that
drive...formatting will get her back access to the drive, granted, but
it'll be wiped clean by the format...it might turn out that things are
badly damaged and irretrievable that she'll have little choice but to
wipe it clean to get her drive back...but we should be trying to get
her data back, if possible, first...

Veronica, if you want to try to get the data back, try the utilities
and things Dazza suggested first...as formatting will help get your
drive back so it can be used but is an extreme measure because it'll
wipe it clean...you probably might know this already but I had to dive
in and make sure before you typed "format d:" or whatever and lost all
chance (excluding specialist equipment ;) to get your data back...

If all else fails, then, unfortunately, you just might have to format
it to get the drive operational again...but consider what Thorsten has
said as a "last resort" because it works but is an extreme measure...

Anyway, good luck, Veronica...as you've got that nightmare situation
we all want to avoid...

Wait a minute, though...a thought has just occurred to me...do you
have just the one partition on drive D that takes up all of the
drive's space (i.e. the default that DOS / Windows FDISK assumes...and
the standard way things get set up when you by a drive with DOS /
Windows pre-installed :)? Because, in such a case, it is a possibility
that we could work out what values to stick into the master parition
table, where "FDISK /MBR" failed...what I'm thinking is that the
partition will basically be of identical size as the drive's geometry
but excluding the master boot record stuff at the start (FDISK does
follow a set pattern of how to lay out the partitions when you request
the entire drive...it should be possible to work out what it would
have put in that table...but this'll only really be a feasible option
if there's only one "all inclusive" partition on the drive because
with multiple partitions we'd have to know the exact sizes alloted to
each paritition)...then, after carefully working out what the values
should be, you can do a "FDISK /MBR" just to get back the loader code
and standard DOS fields in the bootsector...and then write a little
program that'll stick our calculated values into the parition table
manually...working out the OS identifier should be immensely simple
(look up the file system type in the list of OS/FS identifiers :) and
we should be able to make a very good guess at the start sector and
size of the paritition, if we only have the one of them...the start
will be where FDISK always puts it and the size will correspond to the
size of your hard disk...

It's a little risky but, if nothing else works, it might be worth a
shot :)...

Beth :)



Fri, 08 Oct 2004 22:08:36 GMT  
 
 [ 3 post ] 

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