Fujitsu MHM2200AT Manual/User Guide - Page 31
Error Rate, 1.9 Media Defects
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Device Overview 1.8 Error Rate Known defects, for which alternative blocks can be assigned, are not included in the error rate count below. It is assumed that the data blocks to be accessed are evenly distributed on the disk media. (1) Unrecoverable read error Read errors that cannot be recovered by maximum read retries of drive without user's retry and ECC corrections shall occur no more than 10 times when reading data of 1014 bits. Read retries are executed according to the disk drive's error recovery procedure, and include read retries accompanying head offset operations. (2) Positioning error Positioning (seek) errors that can be recovered by one retry shall occur no more than 10 times in 107 seek operations. 1.9 Media Defects Defective sectors are replaced with alternates when the disk (the MHL Series and MHM Series) are formatted prior to shipment from the factory (low level format). Thus, the hosts see a defect-free devices. Alternate sectors are automatically accessed by the disk drive. The user need not be concerned with access to alternate sectors. 1-10 C141-E104-03EN