Hitachi HTS541010G9AT00 Specifications - Page 78
Seek Overlap
UPC - 000061425019
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The password, the Set Max security mode, and the unlock counter do not persist over a power cycle but persist over a COMRESET or software reset. NOTE: If this command is immediately preceded by a Read Native MAX ADDRESS command, it shall be interpreted as a Set Max ADDRESS command regardless of Feature register value. Table 38: Set Max security mode transition 10.11 Seek Overlap HTS5410XXG9SA00 provide accurate seek time measurement method. The seek command is usually used to measure the device seek time by accumulating execution time for a number of seek commands. With typical implementation of the seek command, this measurement must including the device and host command overhead. To eliminate this overhead, HTS5410XXG9SA00 overlap the seek command as described below. The first seek command completes before the actual seek operation is over. Then device can receive the next seek command from the host but actual seek operation for the next seek command starts right after the actual seek operation for the first seek command is completed. In other words, the execution of two seek commands overlaps excluding the actual seek operation. With this overlap, total elapsed time for a number of seek commands is the total accumulated time for the actual seek operation plus one pre and post overhead. When the number of seeks is large, just this one overhead can be ignored. Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification 66