Hitachi Deskstar 7K250 User manual

Hard Disk Drive Specification
Deskstar 7K250
3.5 inch Ultra ATA/100 hard disk drive
Models: HDS722525VLAT80
HDS722516VLAT80
HDS722516VLAT20
HDS722512VLAT80
HDS722512VLAT20
HDS722580VLAT20
HDS722540VLAT20
Version 1.5 12 December 2005

Hard Disk Drive Specification
Deskstar 7K250
3.5 inch Ultra ATA/100 hard disk drive
Models: HDS722525VLAT80
HDS722516VLAT80
HDS722516VLAT20
HDS722512VLAT80
HDS722512VLAT20
HDS722580VLAT20
HDS722540VLAT20
Version 1.5 12 December 2005

1st Edition (Revision 0.1) Sxxx-xxxx-01 (1 April 2003) Preliminary
2nd Edition (Revision 0.2) Sxxx-xxxx-01 (5 June 2003) Revision
3rd Edition (Revision 0.3) Sxxx-xxxx-03 (8 July 2003) Revision
4th Edition (Revision 1.0) Sxxx-xxxx-10 (14 July 2003) Revision
5th Edition (Revision 1.1) Sxxx-xxxx-11 (13 August 2003) Revision
6th Edition (Revision 1.2) (09 February 2004) Revision
7th Edition (Revision 1.3) (24 June2004) Revision
8th Edition (Revision 1.4) (21 September 2005) Revision
9th Edition (Revision 1.5) (12 December 2005) Final
The following paragraph does not apply to the United Kingdom or any country where such provisions are
inconsistent with local law: HITACHI GLOBAL STORAGE TECHNOLOGIES PROVIDES THIS PUBLI-
CATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUD-
ING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer or express or implied warranties in
certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the
information herein; these changes will be incorporated in new editions of the publication. Hitachi may make
improvements or changes in any products or programs described in this publication at any time.
It is possible that this publication may contain reference to, or information about, Hitachi products (machines and
programs), programming, or services that are not announced in your country. Such references or information must not
be construed to mean that Hitachi intends to announce such Hitachi products, programming, or services in your coun-
try.
Technical information about this product is available by contacting your local Hitachi Global Storage Technologies
representative or on the Internet at
http://www.hitachigst.com
Hitachi Global Storage Technologies may have patents or pending patent applications covering subject matter in this
document. The furnishing of this document does not give you any license to these patents. ©Copyright Hitachi Glo-
bal Storage Technologies
Note to U.S. Government Users - Documentation related subject to restricted rights - Use, duplication or disclosure is
subject to restrictions set forth in GSA ADP Schedule Contract with Hitachi Global Storage Technologies Inc.

Table Of Contents
1.0 General................................................................................................................1
1.1 Introduction..............................................................................................1
1.2 References................................................................................................1
1.3 Abbreviations...........................................................................................1
1.4 Caution.....................................................................................................3
2.0 General features of the drive ............................................................................5
3.0 Fixed-disk subsystem description.....................................................................9
3.1 Control electronics...................................................................................9
3.2 Head disk assembly ................................................................................9
3.3 Actuator ...................................................................................................9
4.0 Drive characteristics..........................................................................................11
4.1 Default logical drive parameters..............................................................11
4.2 Data sheet.................................................................................................12
4.3 Drive organization ...................................................................................13
4.3.1 Drive format....................................................................................13
4.3.2 Cylinder allocation..........................................................................13
4.4 Performance characteristics.....................................................................15
4.4.1 Command overhead........................................................................15
4.4.2 Mechanical positioning...................................................................15
4.4.3 Drive ready time .............................................................................17
4.4.4 Data transfer speed..........................................................................18
4.4.5 Throughput......................................................................................19
4.4.6 Operating modes.............................................................................20
5.0 Defect flagging strategy.....................................................................................21
6.0 Specification .......................................................................................................23
6.1 Jumper settings ........................................................................................23
6.1.1 Jumper pin location.........................................................................23
6.1.2 Jumper pin identification ................................................................23
6.1.3 Jumper pin assignment....................................................................24
6.1.4 Jumper positions .............................................................................24
6.2 Environment.............................................................................................28
6.2.1 Temperature and humidity..............................................................28
6.2.2 Corrosion test..................................................................................29
6.3 DC power requirements...........................................................................29
6.3.1 Input voltage ...................................................................................29