File Adapter Checking System
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
A data deserializer 10 (Fig. 1) decodes the data stream from the file adapter 50 to the file 100 to provide a signal indicating when certain bytes of data are present so as to enable error forcing into the data stream written to the disk file 100, whereby upon read back of the file adapter 50 the forced errors are detected for diagnostic purposes. The file adapter 50, in addition to serializing and deserializing data to be written to and read from the file 100, also adds certain bytes into the data stream which are used for control purposes. These added bytes (Fig. 2) include Gaps, Sync, CRC (cyclic redundancy check, ECC (error correction code) and ID (identification). It is desirable to be able to check to see if the adapter 50 added the control bytes correctly.