Difference between revisions of "Wii Backup Disc"

Latest revision as of 06:23, 6 August 2022

The Wii Backup Disc is a service disc apparently used inside Official Nintendo Repair shops to transfer personal data like savegames and console settings between Wiis as part of a repair.

While it does not transfer channels, it is capable of transferring enough to be able to redownload the channels from the Wii Shop Channel, which the disc says to do. It is not clear how it does this; the ticket may be resigned, or the whole Wii Shop account might be transferred. The ticket would probably go together with the save data in an RBK file.

"Change WiiId" is mostly useless. WiiId is only used as your Wii Number that you give to your friends so they can send you Wii Mail. When you pick it, it assigns you a new random ID, possibly by incrementing the reset counter.

It also doesn't boot on full bricked Wiis and it's unlikely that it repairs half bricked Wiis since delete all only deletes savegames/settings and not any channel content (Weather/News/Games..) or IOS.

The "DevCerts" are two WAD files on the disc FS called "dummy-cls.wad" and "dummy-loc.wad," both of which have one content which is 0x40 bytes. dummy-loc is empty while dummy-cls has the word "dummy" together with the title ID. The "dummy-loc.wad" file also has a certificate chain including the debug certificates. "dummy-cls.wad" has a ticket which retail Wiis do not accept, therefore it cannot be installed.

While the ID of this disc is 410E (or possibly 408E for some versions), the TMD itself reports it as 1-2, probably to get access to ES_SetUid.

Launching

Make sure Priiloader is installed
Enable the Allow TitleID RAAE,408x,410x and Remove IOS16 Disc Error hacks
Disable Block Disc Updates if it is enabled
1. This is only required to install IOS16, and can be re-enabled after IOS16 is installed from the disc. Note that clicking "Finalize Repair" will delete IOS16, requiring this part to be repeated.
Load the disc from the Disc Channel.

Update partition

The Wii Backup Disc was the only known official application to use IOS16. Because IOS16 is signed by Nintendo, and the update partition of the disc only has IOS16 and boot2v2, homebrew install discs were released that used IOS16 and had a copy of the Wii Backup Disc's update partition.

When RVL-CPU-20 consoles were released, IOS16 became one of the only IOSes that could be downgraded without issues, which resulted in general homebrew also installing IOS16 to get access to the signing bug and patch other IOSes.

Blocking

Nintendo responded to unauthorized disc and IOS16 usage in the 4.0 update by releasing a stubbed IOS16 (v512). In addition, the System Menu refuses to boot any disc that uses IOS16, with the debug message This must be a backup disk and the standard "An error has occurred" screen, and it blocks the ID 410x in the same area of the code that blocks the Wii Startup Disc, causing it to appear as an invalid disc.

It is unknown how repairs worked after this point, since the debug message would make less sense if a new Wii Backup Disc was released.

Debug SDK

The Wii Backup Disc includes debug SDK libraries, which do not have the same optimized assembly that retail libraries have. In addition, they print more errors, including more source filenames such as NANDOpenClose.c.

Gallery

Wii Backup Disc
Main menu
First page of savefiles
Second page of savefiles
Save confirmation on first page
Save confirmation on second page
List of backups that can be restored
Confirming backup restoration

@@ Line 1: / Line 1: @@
-The "Wii Backup Disc" is a service disc apparently used inside Official Nintendo Repair shops to transfer personal data like savegames and console settings between Wiis as part of a repair.
+The '''Wii Backup Disc''' is a service disc apparently used inside Official Nintendo Repair shops to transfer personal data like savegames and console settings between Wiis as part of a repair.
-It's not entirely clear what it does; something it does *not* do -- even though it appears it might -- is allow VC games to be transferred between consoles.  Instead, the user is told to redownload the games from the Wii Store (for free).
+While it does not transfer [[channel]]s, it is capable of transferring enough to be able to redownload the channels from the [[Wii Shop Channel]], which the disc says to do. It is not clear how it does this; the ticket may be resigned, or the whole Wii Shop account might be transferred. The ticket would probably go together with the save data in an [[RBK]] file.
-Note:  "Change WiiId" is mostly useless.  WiiId is only used as your "Wii Number" that you give to your friends so they can send you Wii Mail.  When you pick it, it assigns you a new random ID.
+"Change WiiId" is mostly useless. WiiId is only used as your [[Wii Number]] that you give to your friends so they can send you Wii Mail. When you pick it, it assigns you a new random ID, possibly by incrementing the reset counter.
-It also doesn't boot on full bricked Wiis and it's unlikely that it repairs half bricked Wiis since delete all only deletes savegames/settings
+It also doesn't boot on full bricked Wiis and it's unlikely that it repairs half bricked Wiis since delete all only deletes savegames/settings and not any channel content (Weather/News/Games..) or IOS.
-and not any VC content (Weather/News/Games..) or the firmware.
+The "DevCerts" are two [[WAD]] files on the disc FS called "dummy-cls.wad" and "dummy-loc.wad," both of which have one content which is 0x40 bytes. dummy-loc is empty while dummy-cls has the word "dummy" together with the title ID. The "dummy-loc.wad" file also has a [[certificate chain]] including the debug certificates. "dummy-cls.wad" has a ticket which retail Wiis do not accept, therefore it cannot be installed.
+While the ID of this disc is 410E (or possibly 408E for some versions), the TMD itself reports it as 1-2, probably to get access to <code>ES_SetUid</code>.
+== Launching ==
+# Make sure [[Priiloader]] is installed
+# Enable the <code>Allow TitleID RAAE,408x,410x</code> and <code>Remove IOS16 Disc Error</code> hacks
+# Disable <code>Block Disc Updates</code> if it is enabled
+## This is only required to install IOS16, and can be re-enabled after IOS16 is installed from the disc. Note that clicking "Finalize Repair" will delete IOS16, requiring this part to be repeated.
+# Load the disc from the [[Disc Channel]].
+== Update partition ==
+The Wii Backup Disc was the only known official application to use [[IOS16]]. Because IOS16 is signed by Nintendo, and the update partition of the disc only has IOS16 and [[boot2v2]], homebrew install discs were released that used IOS16 and had a copy of the Wii Backup Disc's update partition.
+When [[RVL-CPU-20]] consoles were released, [[IOS16]] became one of the only IOSes that could be downgraded without issues, which resulted in general homebrew also installing [[IOS16]] to get access to the [[signing bug]] and patch other IOSes.
+== Blocking ==
+Nintendo responded to unauthorized disc and IOS16 usage in the [[4.0|4.0 update]] by releasing a stubbed [[IOS16]] (v512). In addition, the System Menu refuses to boot any disc that uses IOS16, with the debug message <code>This must be a backup disk</code> and the standard "An error has occurred" screen, and it blocks the ID 410x in the same area of the code that blocks the [[Wii Startup Disc]], causing it to appear as an invalid disc.
+It is unknown how repairs worked after this point, since the debug message would make less sense if a new Wii Backup Disc was released.
+== Debug SDK ==
+The Wii Backup Disc includes debug [[SDK]] libraries, which do not have the same optimized assembly that retail libraries have. In addition, they print more errors, including more source filenames such as <code>NANDOpenClose.c</code>.
-(insert more explanation here)
+== Gallery ==
+<gallery>
+File:Backup disc.jpg|Wii Backup Disc
+File:BackupDiscMenu.jpg|Main menu
+File:BackupDiscSdSave.jpg|First page of savefiles
+File:BackupDiscSdSave2.jpg|Second page of savefiles
+File:BackupDiscSdSave3.jpg|Save confirmation on first page
+File:BackupDiscSdSave4.jpg|Save confirmation on second page
+File:BackupDiscSdRestore.jpg|List of backups that can be restored
+File:BackupDiscSdRestore2.jpg|Confirming backup restoration
+</gallery>
-[[Image:Gayfish1.jpg]]
+[[Category:Utility discs]]
-[[Image:Gayfish2.jpg]]
-[[Image:Gayfish3.jpg]]
-[[Image:Gayfish4.jpg]]
-[[Image:Gayfish5.jpg]]
-[[Image:Gayfish6.jpg]]
-[[Image:Gayfish7.jpg]]