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The other fields of the READ DISC STRUCTURE Command Descriptor Block shall be set as described in the Mt. Fuji specification. 4. The DISC STRUCTURE Data Length field specifies the length in bytes of the following DISC STRUCTURE data that is available to be transferred to the host. The DISC STRUCTURE Data Length value does not include the DISC STRUCTURE Data Length field itself. For the Format Code of 8016, the value of this field is 002216. Bytes 4 through 19 return the 128-bit Volume Identifier value.

In this record, each subset-difference is encoded with 5 bytes. The mask for u is given by the first byte. That byte is treated as a number, the number of low-order 0-bits in the mask. For example, the value 0116 denotes a mask of FFFFFFFE16; value 0A16 denotes a mask of FFFFFC0016. The last 4 bytes are the uv number, most significant byte first. ) If a device encounters a u mask value whose high-order two bits are non-zero, without finding an applicable subset, it may conclude it is revoked. In other words, if the u mask is not of the form 00xxxxxx2, this marks the end of the list.

However, they may do so if they so choose. Table 3-4 – Host Revocation List Entry Bit Byte 0 1 2 3 4 5 6 7 7 6 5 4 3 2 1 0 Range Host ID A Host Revocation List Entry includes: • A 2-byte Range value indicates the range of revoked ID’s starting from the ID contained in the record. A value of zero in the Range field indicates that only one ID is being revoked. • A 6-byte Host ID value identifying the host being revoked. The length of the Host Revocation List Record is always a multiple of four bytes.

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AACS Introduction and Common Cryptographic Elements


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