Seagate ST200FX0002 ユーザーズマニュアル

Pulsar XT.2 SAS Product Manual, Rev. B

11

This section provides detailed information concerning performance-related characteristics and features of Pul-
sar XT.2 drives.

Data provided is based on format at 512-bytes.

 

 

Drive capacity

400

200

100

GB 

(formatted, rounded off value)

Flash Memory Type

NAND SLC

Emulated LBA Size

512, 520, 524, 528, 4096, 4160, 4192, or 4224

Native Programmable Page Size

4096 User Bytes

Default Transfer Alignment Offset 

0

See Section 11.4.1, "SAS physical interface" and the SAS Interface Manual (part number 100293071) for addi-
tional timing details.

Access measurements are taken with nominal power at 25°C ambient temperature. All times are measured 
using drive diagnostics. The specifications in the table below are defined as follows: 

• Page-to-page access time is an average of all possible page-to-page accesses in both directions for a 

sequentially preconditioned drive.

• Average access time is a true statistical random average of at least 5000 measurements of accesses 

between programmable pages on a randomly preconditioned drive.

1,2

1.

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

2.

Assumes no errors.

3.

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

These drives are designed to provide the highest possible performance under typical conditions. 
However, due to the nature of Flash memory technologies there are many factors that can result in 
values different than those stated in this specification

2.

1,2

Average

Typical 

3

268

133

208

121

Page to Page

268

133

207

121

Average Latency

247

188