I got the famous ? folder while restarting the computer on my 13' macbookpro leopard.
System does not recognize the hddm this is what it gives me after trying to repair:
-bash-3.2# diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *1.2 GB disk0
1: Apple_partition_map 30.7 KB disk0s1
2: Apple_HFS Mac OS X Base System 1.2 GB disk0s2
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: *500.1 GB disk1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk2
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk3
/dev/disk4
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk4
/dev/disk5
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk5
/dev/disk6
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk6
/dev/disk7
#: TYPE NAME SIZE IDENTIFIER
0: untitled *6.3 MB disk7
/dev/disk8
#: TYPE NAME SIZE IDENTIFIER
0: untitled *2.1 MB disk8
/dev/disk9
#: TYPE NAME SIZE IDENTIFIER
0: untitled *1.0 MB disk9
/dev/disk10
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk10
/dev/disk11
#: TYPE NAME SIZE IDENTIFIER
0: untitled *524.3 KB disk11
/dev/disk12
#: TYPE NAME SIZE IDENTIFIER
0: untitled *1.0 MB disk12
/dev/disk13
#: TYPE NAME SIZE IDENTIFIER
0: temp *3.8 GB disk13
/dev/disk15
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *320.1 GB disk15
1: EFI 209.7 MB disk15s1
2: Apple_HFS HD 320 319.7 GB disk15s2
-bash-3.2# diskutil unmount force /dev/disk1
disk1 was already unmounted or it has a partitioning scheme so use "diskutil unmountDisk" instead
-bash-3.2# diskutil unmountDisk force /dev/disk1
Forced unmount of all volumes on disk1 was successful
-bash-3.2# diskutil zeroDisk /dev/disk1
Started erase on disk1
Error: -69759: Securely erasing data to prevent recovery failed
Underlying error: 5: POSIX reports: Input/output error
-bash-3.2#
Thanks for the challenged ones who can give me a hand urgently
