| 摘要 |
A method of updating an optical memory disc, the disc being of the type that has a plurality of zones, one of the zones containing at least one directory block that includes a plurality of entries in the form of addresses which point at data. The method comprising the steps of reading the entries of the one directory block into a temporary location; altering the entries of the one directory block with new directory information; dividing the entries of the one directory block into two new directory blocks, each of the new directory blocks being designated by a separate pointer; writing the two new directory blocks from the temporary location onto the optical memory disc; and storing the pointers in a new directory pointer block of the optical memory disc, whereby subsequent addition of new directory information requires the alteration of less than all of the directory blocks.
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