Seagate ST3146855SS User Manual

300, 146 and 73 GB • 15K RPM • Ultra320 SCSI,

3-Gb/s Serial Attached SCSI (SAS) and 4-Gb/s FC

Key Advantages

• Perpendicular recording is fundamentally superior, enabling 300-GB
capacity with 30 per cent higher sustained data rate.

• The Seagate® Cheetah® 15K.5 drive is the first drive to break the
100-MB sustained transfer rate barrier, delivering up to 125 MB/s.

• Fastest and most reliable Cheetah 15K drive ever

• 30 per cent more IOPS and more than 20 per cent faster response
times than 3.5-inch 10K drives

• Enables higher performance with fewer drives, reducing supporting
infrastructure, maintenance and space needs, while increasing
system reliability

• Highest reliability of any 3.5-inch drive in the industry, designed for
demanding 24x7 enterprise applications

• Reduces RAID rebuild times while minimising reliability risks

• Non-recoverable error rate has been improved by a factor of 10.

Best-Fit Applications

All mainstream enterprise applications, such as:

• Email

• Business processing

• Transaction processing

• Decision support

• Storage area networks (SAN)

• Network attached storage (NAS)

• Internet and e-commerce

Cheetah® 15K.5

Mainstream enterprise hard drive storage

Data Sheet

Cheetah® 15K.5

Mainstream enterprise hard drive storage

AMERI CAS Seaga te Technolog y LLC 920 Dis c Drive, Sc otts Vall ey, Californ ia 95066 , United St ates, [phone]
ASIA /PACIFIC S eagate Tech nology I nterna tional Lt d. 7000 An g Mo Kio Avenu e 5, Singa pore 569877, [phone]
EUROPE, MID DLE EAS T AND AFRI CA Seagat e Technolog y SAS 130–136, ru e de Silly, 92773 , Boulogn e-Bil lancour t Cedex, France , [phone]

Copyrigh t © 2007 Seagate Technolo gy LLC. All rights reser ved. Printed in USA. Seag ate, Seagate Technol ogy and the Wave logo ar e registere d trademark s of Seagate Technolo gy LLC in the United Sta tes and/or other cou ntries.
Cheetah is eithe r a trademark or registe red trademark of Seag ate Technology LLC or one of its affiliated compa nies in the United States and/or other cou ntries. All other trad emarks or registere d trademar ks are the property of thei r
respe ctive owner s. One gigabyte , or GB, equa ls one billion by tes when ref erring to h ard drive ca pacity. Access ible capa city may va ry depen ding on operati ng environ ment and format ting. Seagate re serves th e right to change,
without notice, pro duct offerings or sp ecifications. Pub lication Number : DS1594.4-0712GB, December 2007

Lowest Cost of Ownership

• Fifth-generation Cheetah 15K drive has the highest
capacity and is the fastest and most reliable ever.

• Cheetah 15K.5 drive performance and reliability enable
lower TCO for enterprise applications.

• 15K RPM and fast seek times deliver the fastest time­to-data, resulting in 30 per cent more IOPS and
over 20 per cent faster response times than 3.5-inch
10K drives.

• Higher performance with fewer drives—reducing
support infrastructure, physical space requirements
and storage management costs

• The highest reliability of any 3.5-inch drive, and increased
system reliability due to the need for fewer drives

Highest Reliability

• Seagate continues to focus on reliability and data
protection. New features in this generation have improved
the non-recoverable error rate by a factor of 10.

• Seagate-exclusive IRAW (Idle Read After Write)
enhances data protection by verifying—during drive idle
time—that data in the drive buffer was properly written.

• Seagate-exclusive enhanced Error Correction Code
better maintains performance throughout the life
of the drive and reduces the probability of lost data.

• The second generation of Seagate-exclusive Background
Media Scan (BMS) proactively scans the media for
potential defects during drive idle time. It enables
incipient errors to be corrected before data is lost.

• The Cheetah 15K.5 drive is designed and manufactured
by the same teams that successfully delivered the past
four award-winning generations.

Seagate Service Centres—Worldwide Support

• Pre-sales and technical support at 00-800-6890-8282

• Expert email support and complete historical web
content available online

• Experienced support staff

• Seagate Design Service Centres (DSC) help companies
transform innovative ideas into viable products.

Specifications

300 GB

1

146.8 GB173.4 GB

1

Model Numb er

ST330 0655LW/ LC/FC/ SS ST31468 55LW/LC /FC/S S ST373 455LW/LC /FC/S S

Capaci ty

Format ted 512 Kbytes/ Sector (GB )

300 146.8 73.4

Exte rnal Transfe r Rate (MB /s)
Ultra3 20 SCSI
4-Gb /s Fibre Channel
3-Gb /s Serial Attac hed SCSI

320

400

300

320

400

300

320

400

300

Performance

Spindle Sp eed (RPM)

15K 15K 15K

Average La tency (ms)

2.0 2.0 2.0

Seek Time
Average Read/Wr ite (ms )
Track-to-Track Read /Write (ms )

3.5/4. 0

0.2/ 0.4

3.5/4. 0

0.2/ 0.4

3.5/4. 0

0.2/ 0.4

Transfer Ra te
Interna l (Mb/ s)
Interna l Formatt ed (MB /s)
Sustain ed (MB /s)

960 to 1,607

89 to 150

73 to 125

960 to 1,607

89 to 150

73 to 125

960 to 1,607

89 to 150

73 to 125

Cache, Mul ti-segmented ( MB/s)

16 16 16

Config uration /Or ganisa tion

Discs

4 2 1

Heads

8 4 2

Non-recoverable Read Error s per Bits Read

1 sector per 10E16 1 sector per 10E16 1 sector per 10E16

Annuali sed Failure Ra te (AFR )

0.62% 0.62% 0.62%

Power Man agement

Typical (W )
SCSI
Fibre Chan nel
SAS

17.6

18.8

17.4

14.2

16.5

14.9

13.6

14.7

13.7

Power Idle ( W)
SCSI
Fibre Chan nel
SAS

12.5

13.7

13.2

9.6

10.7

11.2

8.1

9.2

8.4

Enviro nmenta l

Temperatur e, Operating (°C )

5 to 55 5 to 55 5 to 55

Temperatur e, Non-operating (°C)

–40 to 70 –40 to 70 –40 to 70

Shock, Operating : 2 ms (Gs)

60 60 60

Shock, Non-oper ating: 2 ms ( Gs)

250 250 250

Acoust ics Idle (b els—so und power)

3.6 3.6 3.6

Vibrat ion, Opera ting: < 400 Hz (G s)

1.0 1.0 1.0

Vibrat ion, Non- operatin g: <40 0 Hz (Gs )

2.0 2.0 2.0

Physica l

Height ( in/mm )

1.0/25. 4 1.0/25. 4 1.0/25 .4

Width ( in/mm )

4.0/101.6 4.0/101.6 4.0/101.6

Depth (in/mm )

5.75/146.0 5 5.75/146.0 5 5.75/146.0 5

Weight (lb/kg )

1.5/0.77 1 1.5/0.771 1.5/0 .771

Warrant y

Limited Wa rranty ( years)

5 5 5

1

One gigaby te, or GB, equals one billio n bytes when referri ng to hard drive capacit y.

www.seagate.com
00-800-6890-8282