Seagate ST300MM0026 Savvio 10K.1 SCSI Product Manual - Page 18

4.2.3 Generalized performance characteristics Minimum sector interleave 1 to 1 Data buffer transfer rate to/from disc media (one 512-byte sector): Minimum [3]* Maximum [3] 63 Mbytes/sec 94 Mbytes/sec SCSI interface data transfer rate (asynchronous): Maximum instantaneous one byte wide Maximum instantaneous two bytes wide Synchronous transfer rate In low voltage differential (LVD) interface mode 5.0 Mbytes/sec [4] 10.0 Mbytes/sec [4] Ultra320 SCSI 5.0 to 320 Mbytes/sec Sector Sizes: Default 512 byte user data blocks Variable 512 to 528 bytes per sector in even number of bytes per sector. If n (number of bytes per sector) is odd, then n-1 will be used. Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time using the spare sectors per sparing zone reallocation scheme.) Negligible Average rotational latency 3.00 msec Notes for Section 4.2. [1] Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect). [2] Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives. [3] Assumes no errors and no sector has been relocated. [4] Assumes system ability to support the rates listed and no cable loss. [5] Access time = controller overhead + average seek time and applies to all data transfer commands. Access to data = access time + latency time. 4.3 Start/stop time After DC power at nominal voltage has been applied, the drive becomes ready within 20 seconds if the Motor Start Option is disabled (i.e. the motor starts as soon as the power has been applied). If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure which may cause the time to become ready to exceed 20 seconds. During spin up to ready time the drive responds to some commands over the SCSI interface in less than 3 seconds after application of power. Stop time is 30 seconds from removal of DC power. If the Motor Start Option is enabled, the internal controller accepts the commands listed in the SCSI Command Reference Manual less than 3 seconds after DC power has been applied. After the Motor Start Command has been received the drive becomes ready for normal operations within 20 seconds typically (excluding an error recovery procedure). The Motor Start Command can also be used to command the drive to stop the spindle (see the SCSI Command Reference Manual). There is no power control switch on the drive. 12 Savvio SCSI Product Manual, Rev. D