Seagate ST2000NM0063 Manual De Usuario

C

ONSTELLATION 

ES.1 SAS P

RODUCT 

M

ANUAL

, R

EV

. G

  9

  

This section provides detailed information concerning performance-related characteristics and features of Constellation ES.1 drives.

Drive capacity

2TB

1TB

500GB

(formatted, rounded off value)

Read/write data heads

8

4

2

Bytes per track

1,012,608

1,012,608

1,012,608

Bytes (average, rounded off values)

Bytes per surface

250,000

250,000

250,000

MB (unformatted, rounded off value)

Tracks per surface (total)

248,600

248,600

248,600

Tracks (user accessible)

Tracks per inch

237,000

237,000

237,000

TPI (average)

Peak bits per inch

1,523,000

1,523,000

1,523,000

BPI 

Areal density

324

324

324

Gb/in

2

Internal data rate

95 - 212

95 - 212

95 - 212

MB/s (variable with zone)

Disk rotation speed

7200

7200

7200

rpm

Avg rotational latency

4.16

4.16

4.16

ms

See Section 11.4.1, "SAS physical interface" on page 53 and the SAS Interface Manual (part number 100293071) for additional timing 
details.

2

1

1.

Execution time measured from receipt of the Command to the Response.

, 

Typical

4

3

3.

Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as 
measured on a representative sample of drives.

,

4.

Access time = controller overhead + average seek time and applies to all data transfer commands. 
Access to data = access time + latency time.

8.3

9.3

8.5

9.5

Typical

3,4

0.5

0.8

0.7

1.0

Typical

3,4

18

19

18.2

19.2

627

345

173

314

173

86

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).

When changing sector sizes, the format times shown above may need to be increased by 30 minutes.

2.

Assumes no errors and no sector has been relocated.

1, 2