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Revision as of 22:27, 18 August 2018

1,186 bytes removed ,  22:27, 18 August 2018
Removed things that are not true
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Also known as the NAND.
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The Wii contains 512 MiB of NAND flash storage, which is used to store "system software", channels (including Virtual Console titles), game saves, and system settings.
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Physical layout:
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The NAND flash device is divided into 4096 blocks of 8 clusters. Each cluster is 8 pages. Each page is 2048 bytes of data and 64 bytes of "spare data" (used for error-correction (ECC) data and HMAC signatures on individual clusters).
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Block 0 (pages 0-0x3F): boot1
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boot1 is the second-stage bootloader; it is decrypted by boot0, which resides on a read-only mask ROM inside the Starlet coprocessor. Its primary function is to load and decrypt boot2.
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Block 0 is guaranteed by the manufacturer to be valid, so there is no bad block map necessary.
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Blocks 1-7 (Pages 0x40 - 0x1ff) : boot2 (two copies and blockmaps)
   
boot2 is the third-stage bootloader; it is stored in a modified WAD format, including a ticket that is encrypted with the common key and signed.
 
boot2 is the third-stage bootloader; it is stored in a modified WAD format, including a ticket that is encrypted with the common key and signed.
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Block 8 / Cluster 0x40 / Page 0x200: beginning of per-console unique data
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Clusters 0x40 - 0x7EFF: Encrypted filesystem data. Data is encrypted with a per-console AES key, and then signed with a (separate, per-console) HMAC key.
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Clusters 0x7F00-0x7FFF: Filesystem metadata (SFFS, unencrypted). There are 16 superblocks contained therein — one every 16 clusters.
 
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