errore 18 e errore 21 hd interno xp hd esterno ubuntu 7,10

[drcescon]

SALVE,
da qualche giorno ho installato ubuntu 7,10 su un HD esterno, sull'hd interno era già installato xp.
dopo vari problemi con il grub al momento se hd esterno è collegato ubuntu funziona ma xp no, mi spiego dopo il loading grub mi propone la scelta tra ubuntu e xp ma se scelgo xp mi da error 18, se invece scego ubuntu non c'è problema.
Se hd esterno è scollegato mi da errore 22 e si blocca.
Di seguito il risultato di fdisk -l

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x34fe34fd

Device Boot Start End Blocks Id System
/dev/sda1 * 1 765 6144831 12 Compaq diagnostics
/dev/sda2 766 10077 74798640 7 HPFS/NTFS
/dev/sda3 10078 19457 75344850 7 HPFS/NTFS

Disk /dev/sdb: 640.1 GB, 640135028736 bytes
255 heads, 63 sectors/track, 77825 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x30ad950e

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 77451 622125126 83 Linux
/dev/sdb2 77452 77825 3004155 5 Extended
/dev/sdb5 77452 77825 3004123+ 82 Linux swap / Solaris


E ETC FSTAB

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sdb1
UUID=5be298cf-a090-4400-bcea-7b8fcb9a2636 / ext3 defaults,errors=remount-ro 0 1
# /dev/sdb5
UUID=c02f06c3-aeab-47a3-95d7-a999b6760e08 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec 0 0
fabio*fabio-laptop:~$

Non riesco nemmeno più a leggere i dati che sono salvati nella prima partizione dati su hd interno quando seleziono da computer la cartella mi dice unable to mount volunme e nei details unexpected cluster per mft record (-127) failed to mount dev/sda2 the device doesn't have valid NTFS.


DIMENTICAVO ho già tentato il ripristino emergenza con disco xp mi dice nessuna unità disco rigido installata nel computer assicurarsi che i dischi rigidi siano alimentati e connessi correttamente

questo è il contenuto del file /boot/grub/menu.lst


# menu.lst - See: grub(Cool, info grub, update-grub(Cool
# grub-install(Cool, grub-floppy(Cool,
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=5be298cf-a090-4400-bcea-7b8fcb9a2636 ro

## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd1,0)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Ubuntu 7.10, kernel 2.6.22-14-generic
root (hd1,0)
kernel /boot/vmlinuz-2.6.22-14-generic root=UUID=5be298cf-a090-4400-bcea-7b8fcb9a2636 ro quiet splash
initrd /boot/initrd.img-2.6.22-14-generic
quiet

title Ubuntu 7.10, kernel 2.6.22-14-generic (recovery mode)
root (hd1,0)
kernel /boot/vmlinuz-2.6.22-14-generic root=UUID=5be298cf-a090-4400-bcea-7b8fcb9a2636 ro single
initrd /boot/initrd.img-2.6.22-14-generic

title Ubuntu 7.10, memtest86+
root (hd1,0)
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title Windows NT/2000/XP
root (hd0,1)
savedefault
chainloader +1



Nel forum di ubunt dicono di installare la versione 8,10 , ma io ho paura di perdere i dati di xp che già non riesco a leggere.

Qualcuno ha qualche consiglio??

grazie

[sacarde]

18 : Selected cylinder exceeds maximum supported by BIOS
This error is returned when a read is attempted at a linear block address beyond the end of the BIOS translated area. This generally happens if your disk is larger than the BIOS can handle (512MB for (E)IDE disks on older machines or larger than 8GB in general).


21 : Selected disk does not exist
This error is returned if the device part of a device- or full file name refers to a disk or BIOS device that is not present or not recognized by the BIOS in the system.