Disk /dev/rdisk3 - 1000 GB / 931 GiB - CHS 121601 255 63
 Partition Start End Size in sectors
 >P HFS 262208 1953525151 1953262944

In my case, I’ve used pdisk directly on OS X:

 leobook4-w:~ root# pdisk /dev/rdisk3
 pdisk: No valid block 1 on '/dev/rdisk3'
 Edit /dev/rdisk3 -
 Command (? for help): i
 A physical block is 512 bytes:
 A logical block is 512 bytes:
 size of 'device' is 1953525168 blocks (512 byte blocks):
 new size of 'device' is 1953525168 blocks (512 byte blocks)
 Command (? for help): c
 First block: 262208
 Length in blocks: 1953262944
 Name of partition: recover\_leo
 Command (? for help): w
 Writing the map destroys what was there before. Is that okay? \[n/y\]: y
 The partition table has been altered!

 Command (? for help): q

Now I explain a few hoops to get this system to work:

First: persuade Time Machine to see the SMB share as a Time Machine destination by activating the unsupported network drives feature by this console command:

`

defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1

`

Second: set up the file server with SMB dedicated share to Time Machine, create an appropriate disk image locally (see below) and copy it into share.

To create the disk image, you’ll need to find out two pieces of information about the computer you want to backup: its Computer Name and its Ethernet ID (Ethernet MAC address). The Computer Name is the one that you set in the Sharing System Preferences pane. For example my is “LeoBook2”.

You can get the Ethernet ID by this command (use wired mac nic even if you’ll be using wifi connection): `

ifconfig en0 | grep ether | sed s/://g | sed s/ether//

`

Compose image name following this syntax: Computer Name, followed by an underscore, followed by the Ethernet ID without the colons, followed by .sparsebundle (Ex. “LeoBook2_000d9358ca26.sparsebundle”).

Now go to Terminal and type the following commands:

`# DISK_IMAGE_NAME=“LeoBook2_000d9358ca26.sparsebundle”

DISK_SIZE=200000

hdiutil create -library SPUD -megabytes $DISK_SIZE -fs HFS+J -type SPARSEBUNDLE -volname “$DISK_IMAGE_NAME” “$DISK_IMAGE_NAME”`

After you’ve run this command, you should end up with a disk image in your Home. It looks like a single file, but it’s actually a directory (just like a application). Don’t forget to copy this disk image to the appropriate share on your server. Just dragging and dropping from the Finder should work fine.

Now you are able to use the share as Time Machine backup volume.

Have a fun Leo

10.5

Dal tool  “Directory Utility” che si trova in Applications - Utility, sbloccare le impostazioni con il lucchettino, poi dal menu “Edit” c’e’ la comoda voce “Enable Root User” dopodiche’ settare la password.

10.2 - 10.3 - 10.4

Dal tool  “NetInfo Manager” che si trova in Applications - Utility, sbloccare le impostazioni con il lucchettino, poi dal menu “Security” c’e’ la voce “Enable Root User” dopodiche’ settare la password.

10.0 - 10.1

Dal tool  “NetInfo Manager” che si trova in Applications - Utility, sbloccare le impostazioni con il lucchettino, poi dal menu “Security”, “Domain"c’e’ la voce “Enable Root User” dopodiche’ settare la password.

All’apertura si verifica questo errore “your network have been changed by another application” non reversibile con gli strumenti messi a disposizione per intenderci il tasto “OK”

Questo succede per dei monivi di sicurezza dato che le preferenze di rete interagiscono in continuazione con il portachiavi di sistema, vedi per le password PPP, le chiavi Airport e altre configurazioni di accesso.

La cosa piu’ sbrigativa sarebbe tenere le configurazioni bloccate con il lucchettino, ma risulta molto scomodo dover autenticare ogni modifica.

Come soluzione definitiva si puo’ procedere in questo modo: Cercare la seguente cartella

/Library/Preferences/SystemConfiguration

Cancellare i seguenti file:

com.apple.airport.preferences.plist
NetworkInterfaces.plist
preferences.plist
com.apple.nat.plist

Dopo aver fatto questo e’ necessario cancellare tutto il database del portachiavi di sistema, o almeno la definizione delle password legate ai servizi di rete. Attenzione i dati di autenticazione dovranno essere reiseriti al fine di ricostruire con i giusti privilegi il db.

Da terminale in modalita’ root:

Per abilitare:

# nvram boot-args="-v"

Per disabilitare:

# nvram boot-args=

Per la versione del firmware:

# nvram -p

Leopard 10.5

# dscacheutil -flushcache

Tiger 10.4

# lookupd -flushcache