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I am working on getting a PS3 setup with OtherOS++ so I can get the metadata for the ISOs. I'm running into a stumbling block that I could use some help on.

I found the instructions for getting OtherOS++ installed and I was able to successfully make a backup of the NOR with memdemp and dump of the flash with multiMAN.

Now the question is, do you need to be on 3.55 to install OtherOS++?

The dilemma is this PS3 is currently on 4.21 (I'm not entirely sure which flavor). This PS3 has been a guinea pig and has gone from Kmeaw 3.55 CFW, to Rogero CEX 4.30 v2.05 to Cobra-USB FW v6 to now 4.21 (I am not entirely sure which flavor or how it even got there; been a while since I've touched this PS3).

It seems to accept installing packages so whatever flavor of 4.21 it is, it seems to be working ok, but I am not having any luck going back to 3.55 or going to a Rogero firmware (getting errors either way).

Any help would be appreciated as I'm would love to get these dumps going.

Regards

AFAIK you need to be on 3.55 OFW first.. I guess you can downgrade from factory service mode, so get a dongle or try non-dongle method (e.g. http://psx-scene.com/forums/content/fac … tion-1922/ or http://brandonw.net/psp/ps3jig/)

I found a way back to Rogero CEX-3.55 v3.7. Now I'll try and get it on OFW 3.55 and give OtherOS++ a shot!

Success! So, now that I have PS3 Linux running, um, now what. I've never touched Linux, so once it loads me in the petitboot shell, what's next? I have the GetKey file, but where and what do I do with it?

When in petitboot exit to shell. You're now in a basic linux commandline. You need to navigate to the directory containing GetKey, which is on a usb stick. Two commands you need are ls (to list the files in the current directory) and cd (to change the current directory), read up on them if unfamiliar.
Do this:
Some files are listed, one of which should be the usb stick (likely usb names are something like sda1 sdb1 etc). Try them all by going in and listing them until you find your stick. Then you just put a disc in and do this:
This dumps the disc key, disc id and pic and puts it into file output.txt in the same directory as getkey. You could also grab the full pic if you'd like by doing this:
output.txt is the same as before, what's new is big.pic, which is the full pic. It's not required by redump, but it doesn't take much to store it, and who knows it may be useful later.

But before you do any of that, you need 3Dump.bin and put it in same directory as GetKey (easiest is both in root of usb stick), get it by running a pkg as described in the guide.

AH-HA! I'm almost there! So here is where I'm at:

root@ps3-linux:/temp/petitboot/mnt/sda1/GetKey# GetKey 3Dump.bin >output.txt
/bin/ash: can't create output.txt: Read-only file system
/bin/ash: GetKey: not found

If I do a ls in the GetKey director it shows:
3Dump.bin   GetKey

So close I can taste it...and it tastes like victory!

Try reading this thread, ol had the same problem (the usb stick was mounted as read only): /viewtopic.php?p=29558#p29558

edit: And you should write ./GetKey not GetKey (you need to execute by path, ./ means relative to where you are now, GetKey can't be executed like cd and ls because it's not in the PATH)

Does this look right?

GetKey r2
Load keys
Test unit ready: return value of ioctl indicates success
Read pic: return value of ioctl indicates success
get dec key
  establish session keys:
    do send key: return value of ioctl indicates success
    do report key: return value of ioctl indicates success
    calculate session keys
    do send key: return value of ioctl indicates success
  get data
    do unknown e1:
    unknown e1 cdb: e1005400e1349bfeae77479b
    return value of ioctl indicates success
    do unknown e0:     unknown e0 cdb: e00034000dab640312a47c3a
    return value of ioctl indicates success
get_dec_key succeeded!


disc_key = 60b5bf3fa5567a56f389287ead01f251

disc_id = 00000000000000ff00020003XXXXXXXX
PIC:
10020000444901080000200042444f01
1101010000000000006fbbff00100000
006fbbfe000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000

SUCCESS: Everything was correctly dumped.

Yes, you're good to go 

You'll know if something went wrong because it will say WARNING instead of SUCCESS at the end.

BO-YA! So my complete task looks like this (for others who might run into this problem):

root@ps3-linux:/# mount /tmp/petitboot/mnt/sda1 -o rw,remount
warning: can't open /etc/fstab: No such file or directory (I ignore this warning as it does show rw after the command)
root@ps3-linux:/# cd /tmp/petitboot/mnt/sda1/GetKey
root@ps3-linux:/tmp/petitboot/mnt/sda1/GetKey# ./GetKey 3Dump.bin big.pic >output.txt


Thank you all for the help! Now I have a few follow up questions.

1. Is there a way to eject the Blu-ray from the drive so I do not need to go back into the PS3 OS (I notice the eject button doesn't work in PS3 Linux).
2. When I do a "reboot" command the PS3 complains "The system was not turned off properly the last time it was used". Is this normal?
3. How will this be used to verify ISO dumps; Is there a way for the .dats to verify this info in ISO?