problem whit external hard disk

[alex407]

Hell, I have a problem because my knoppix 4 installed on my hard disk doesn't recognize my external hard disk, while if i restart the system from the dvd knoppix recognize it very well.The installed system sees the hard disk, in fact it tells me the productor and other informations, but it doesn't mount the partition, how can I do?
This is my fstab
# /etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hda6 / ext3 defaults,errors=remount-ro 0 1

proc /proc proc defaults 0 0
/dev/fd0 /floppy vfat defaults,user,noauto,showexec,umask=022 0 0
usbfs /proc/bus/usb usbfs devmode=0666 0 0
sysfs /sys sysfs defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
/dev/cdrom /cdrom iso9660 defaults,ro,users,noexec,noauto 0 0
/dev/cdrom1 /cdrom1 iso9660 defaults,ro,users,noexec,noauto 0 0
/dev/dvd /dvd iso9660 defaults,ro,users,noexec,noauto 0 0
# Added by KNOPPIX
/dev/hda1 /mnt/hda1 ntfs noauto,users,exec,ro,umask=000 0 0
# Added by KNOPPIX
/dev/hda5 none swap defaults 0 0
# Added by KNOPPIX
/dev/hda7 /mnt/hda7 ext3 noauto,users,exec 0 0
# Added by KNOPPIX
/dev/hda8 /mnt/hda8 vfat noauto,users,exec,umask=000 0 0

[nad]

Details please.

Have you checked your logs for any messages or errors after the device is plugged in?

tail /var/log/messages (or if there is much info: less /var/log/messages )