Abstract: A data storage medium includes a data structure, called a disk control block, used for administration and control information for the data storage medium. One medium may contain multiple different disk control blocks, each addressing a different function. Each disk control block includes a control block identifier that specifies the function of the disk control block. Each control block also includes a set of standard access control parameters. If a drive encounters an unrecognized disk control block, the drive can still decode the standard control parameters, so that the drive behavior is not inconsistent with the requirements of the unrecognized disk control block.

Abstract: A magnetic resonance (MR) method utilizes a plurality of inductively coupled receiving coil systems quasisimultaneously to measure a nuclear magnetization distribution in an examination zone. The method involves excitation of the nuclear magnetization in an examination zone, exposed to a uniform, steady magnetic field, by means of at least one RF pulse, multiple rephasing of the exited nuclear magnetization in order to generate a plurality of MR echo signals whose number at least equals the number m of receiving coil systems, and switching over the receiving coil systems in such a manner that, subsequent to said excitation, each receiving coil system receives at least one MR echo signal while at the same time alii respective other coil systems are inactive.