Seagate, Seagate Technology, and the Seagate logo are either registered
trademarks or trademarks of Seagate Technology LLC. Barracuda,
DiscWizard, SeaFAX, SeaFONE, SeaShell , SeaShield, S eaTDD, and 3D
Defense System are either registered trademarks or trademarks of
Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners.
Seagate reserves the ri ght to change, without notic e, product offerings or
specifications. No par t of this publication may be reprodu ced in any form
without written permission of Seagate Technology LLC.
This manual describes the functional, mechanical and interface specifications
for Seagate
®
Barracuda® ATA V ST3120023A, ST380023A, ST360015A,
ST340017A, and ST330013A model drives. These drives provide the following
key features:
• 7,200-RPM spindle speed and 2-Mbyte buffer combine for superior desktop
performance.
• High instantaneous (burst) data transfer rates (up to 100 Mbytes per second)
using Ultra DMA mode 5.
• Giant magnetoresistive (GMR) recording heads and EPRML technology,
which provide the drives with increased areal density.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Full-track multiple-sector transfer capability without local processor interven-
tion.
• Quiet operation.
• 350 Gs nonoperating shock.
®
• The innovative, shock-absorbing SeaShield
cover protects the drive against
electrostatic dischar ge (ESD) and ot her handling da mage. It also i ncludes
installation instructions and jumper settings.
• SeaTools diagnostic software performs a drive self-test that eliminates
unnecessary drive returns.
• The 3D Defense System™, which in cludes Drive Defens e, Data Defense,
and Diagnostic Defense, offers the indu stry’s mos t comprehen sive protec tion for disc drives.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
• Support for autodetection of master/slave drives that use cable select
(CSEL).
2Barracuda ATA V Product Manual, Rev. E
Barracuda ATA V Product Manual, Rev. E3
2.0Drive specifications
Unless otherwise noted, all specific ations are me asured un der ambient c onditions, at 25°C, and nom inal po wer. For conveni ence, th e phrases the drive
and this drive are used throughout this manual to indicate ST3120023A,
ST380023A, ST360015A, ST340017A and ST330013A model drives.
2.1Specification summary table
The specification s listed in this table are for quick referenc e. For details on
specification me asurement or definition, see the appropriate section of this
manual.
When addressing these dri v es in LB A mo de, al l bl oc ks (s ector s ) are con secutively numbered from 0 to n–1, where n is the number of guaranteed sectors
as defined above.
InterfaceATA
Recording method16/17 EPRML
Recording density BPI (bits/inch max)542,000
Track density TPI (tracks/inch max)78,000
Areal density (Mbits/inch
Spindle speed (RPM) (± 0.2%)7,200
Max. Internal transfer rate (Mbits/sec)570
2
max)42,200
Sustained transf e r rate
(Mbytes/sec)
I/O data transfer rate
(Mbytes/se c ma x)
Interleave1:1
Cache buffer2 Mbytes (2,048 kbytes)
27 to 44
16.6 (PIO mode 4)
100 (Ultra DMA mode 5)
2.6Physical characteristics
ST360015A
Drive specification
Maximum height(mm)
(inches)
Maximum width(mm)
(inches)
Maximum length(mm)
(inches)
Typical weight(grams)
(pounds)
ST3120023A
ST380023A
26.1
1.028
101.85
4.01
147.0
5.787
635
1.40
ST340017A
ST330013A
26.1
1.028
101.85
4.01
147.0
5.787
635
1.40
8Barracuda ATA V Product Manual, Rev. E
2.7Seek time
Seek measurements a re taken with nom inal p ower at 25°C amb ient tem perature. All times are measured using drive diagnostics. The specifications in
the table below are defined as follows:
• Track-to-track seek time is an avera ge of all possibl e single-tr ack seeks in
both directions.
• Average seek time is a true statistical random average of at leas t 5,000
measurements of seeks between random tracks, less overhead.
Typical seek times (msec)ReadWrite
Track-to-track1.01.2
Average
2 discs
1 disc
Average latency:4.164.16
9.4
9.0
10.5
10.0
Note. These drives are designed to consistently meet the seek times represented
in this manual. Physical seeks, regardless of mode (such as track-to-track
and average), are expected to meet the noted values. However, due to the
manner in which these drives are formatted, benchmark tests that include
command overhead or measure logical seeks may produce results that vary
from these specifications.
2.8Start/stop times
Power-on to Ready (sec)10 (max)
Standby to Ready (sec)10 (max)
Ready to spindle stop (sec)10 (max)
2.9Power specifications
The drive receives DC power (+5V or +12V) through a four-pin standard drive
power connector.
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