Rigid disk block

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Rigid Disk Block (RDB) denotes a data block on a data memory (usually a hard drive ) in which computers of the Amiga series partition - and file system (the -Information partitioning scheme or the partition table ) of this data carrier store.

The Rigid Disk Block itself does not contain any information for the partitions. Instead, it refers to a linked list of partition blocks that contain the actual partition data. These include the starting point, the length, the file system, the bootability and order, and the buffer memory type.

In addition, the partition block can refer to additional drivers for file systems that are not directly supported by the Amiga ROM and that also boot, such as the Professional File System (PFS) or the Smart File System (SFS). The RDB must begin with the ASCII characters "RDSK", but the position is not fixed on the first block of a data carrier. Instead, it can be located within the first 16 blocks, which allows a further partition table to be present at the same time, e.g. B. a master boot record , which is set to block 0 (see also boot sector ).

Almost all Amiga hard disk controllers support the RDB standard, so that the user can use hard disks on different controllers regardless of the controller manufacturer.

Individual evidence

1. ↑ Laurent Clévy: 6.1 What is the Rigid Disk Block? 6.1 What is the Rigid Disk Block? In: The .ADF (Amiga Disk File) format FAQ. April 8, 2017, accessed June 18, 2017 .