Seagate ST3500620SS Manual download pdf (Page 18)

12 Barracuda ES.2 SAS Product Manual, Rev. G

4.2.2 Format command execution time (minutes)

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).

4.2.3 General performance characteristics

4.3 Start/stop time

The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has

been applied.

If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START

STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 20

seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY

(ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1.

After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY

(ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the

drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does

not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT

command.

The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 20 sec-

onds (maximum) from removal of DC power.

There is no power control switch on the drive.

ST31000640SS ST3750630SS ST3500620SS

Maximum (with verify) 400 300 200

Maximum (without verify) 200 150 100

Sustainable disk transfer rate*:

Minimum 56 Mbytes/sec

Maximum 116 Mbytes/sec

SAS Interface maximum instantaneous transfer rate 300 Mbytes/sec* per port

(dual port = 600 Mbytes/sec*)

Logical block sizes

Default is 512-byte data blocks

Sector sizes variable to 512, 520, 524, and 528 kbytes.

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

*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.

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Seagate ST3500620SS Manual Page 18