Can't boot my Mac OS X & can't access hfs+ partitions on other drives after having installed YDL 3.0

[Mathieu Cuvellier]

Hello,

I know I should have back up first but...

In my Power Mac G4 (QuickSilver 933), i have 3 disks of 30,60, and 80 
Go.
While my 30Go was empty, I thought it would be harmful-less to install 
YDL 3.0. on it...

I first had a problem with disk druid crashing at install time, then 
when trying a second time it seemed everything was alright and i could 
boot into YDL.
When I wanted to come back to OS X, the computer stayed with a flashing 
barred O.

I'm currently using an external firewire drive to troubleshoot my 
computer (a 20Go with OS X.2.6).

Using Disk utility, the 60 and 80 Go drives appears without any 
partitions and of course don't mount.
Using Disk Warrior 3, these 2 drives doesn't appear but the manual says 
it won't rebuild directory for disks with an incorrect partition map.

Using pdisk i get the following information (see below) on my disks and 
it seems that partition maps have not been modified so i don't 
understand what's happening.

I can't find anything related to my problem in faqs or mailing lists 
archives.

Do you have clues on what's happening ? Or perhaps the link to a better 
place where to post this problem if this is not the right place.

Thanks a lot.

Mathieu.

-------

[Macintosh:~] mc% sudo pdisk
Password:
Top level command (? for help): L
/dev/rdisk0  map block size=512
    #:                 type name                  length   base      ( 
size )
    1:      Apple_Bootstrap Apple                     63 @ 1
    2:            Apple_HFS Video              120103128 @ 64        ( 
57.3G)
    3:           Apple_Free Extra                      8 @ 120103192

Device block size=512, Number of Blocks=120103200
DeviceType=0x0, DeviceId=0x0

/dev/rdisk1  map block size=512
    #:                 type name                 length   base     ( 
size )
    1:  Apple_partition_map Apple                    63 @ 1
    2:      Apple_Bootstrap*untitled               2048 @ 64       (  
1.0M)
    3:      Apple_UNIX_SVR2 untitled           56625828 @ 2112     ( 
27.0G)
    4:      Apple_UNIX_SVR2 swap                3144960 @ 56627940 (  
1.5G)

Device block size=512, Number of Blocks=59772900
DeviceType=0x0, DeviceId=0x0
Drivers-
1: @ 64 for 23, type=0x1
2: @ 120 for 36, type=0xffff
3: @ 176 for 21, type=0x701
4: @ 232 for 34, type=0xf8ff

/dev/rdisk2  map block size=512
    #:                 type name                  length   base      ( 
size )
    1:      Apple_Bootstrap Apple                     63 @ 1
    2:       Apple_Driver43*Macintosh                 56 @ 64
    3:       Apple_Driver43*Macintosh                 56 @ 120
    4:     Apple_Driver_ATA*Macintosh                 56 @ 176
    5:     Apple_Driver_ATA*Macintosh                 56 @ 232
    6:       Apple_FWDriver Macintosh                512 @ 288
    7:   Apple_Driver_IOKit Macintosh                512 @ 800
    8:        Apple_Patches Patch Partition          512 @ 1312
    9:            Apple_HFS Maxtor HD 80       160084696 @ 1824      ( 
76.3G)
   10:           Apple_Free Extra                      8 @ 160086520

Device block size=512, Number of Blocks=160086528
DeviceType=0x0, DeviceId=0x0
Drivers-
1: @ 64 for 23, type=0x1
2: @ 120 for 36, type=0xffff
3: @ 176 for 21, type=0x701
4: @ 232 for 34, type=0xf8ff

/dev/rdisk3  map block size=512
    #:                 type name                 length   base     ( 
size )
    1:  Apple_partition_map Apple                    63 @ 1
    2:       Apple_Driver43*Macintosh                56 @ 64
    3:       Apple_Driver43*Macintosh                56 @ 120
    4:     Apple_Driver_ATA*Macintosh                56 @ 176
    5:     Apple_Driver_ATA*Macintosh                56 @ 232
    6:       Apple_FWDriver Macintosh               512 @ 288
    7:   Apple_Driver_IOKit Macintosh               512 @ 800
    8:        Apple_Patches Patch Partition         512 @ 1312
    9:            Apple_HFS Apple_HFS_Untitled_4 39068246 @ 1824     ( 
18.6G)
   10:           Apple_Free                           0+@ 39070070

Device block size=512, Number of Blocks=39070080
DeviceType=0x0, DeviceId=0x0
Drivers-
1: @ 64 for 23, type=0x1
2: @ 120 for 36, type=0xffff
3: @ 176 for 21, type=0x701
4: @ 232 for 34, type=0xf8ff

pdisk: can't open file '/dev/rdisk4'  (No such file or directory)
pdisk: can't open file '/dev/rdisk5'  (No such file or directory)
pdisk: can't open file '/dev/rdisk6'  (No such file or directory)