公开(公告)号：JP2012123798A

公开(公告)日：2012-06-28

申请号：JP2011264177

申请日：2011-12-02

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： JOHN BRUCE CARTER ,  WESLEY MICHAEL FELTER ,  ANTHONY NELSON HILLIG

IPC: G06F3/06 ,  G06F1/28

CPC classification number: G11B19/2072 ,  G11B19/02

Abstract: PROBLEM TO BE SOLVED: To provide reliability-aware disk power management.SOLUTION: A token value is maintained based on an allowable number of low power transitions of a hard disk drive without adversely affecting reliability, compared to an actual number of low power transitions of the hard disk drive. The allowable number of low power transitions increases over the hard disk drive's lifetime. Before the hard disk drive performs a low power transition, the token is evaluated to determine if the hard disk drive is allowed to perform a low power transition. Low power transitions discussed include parking the head and spinning-down the hard disk drive.

Abstract translation: 要解决的问题：提供可靠性感知的磁盘电源管理。 解决方案：与硬盘驱动器的实际的低功率转换数相比，基于硬盘驱动器的允许的低功率转换次数来维持令牌值，而不会不利地影响可靠性。 低功耗转换的容许次数随硬盘驱动器的使用寿命而增加。 在硬盘驱动器执行低功耗转换之前，会对令牌进行评估，以确定硬盘驱动器是否允许执行低功耗转换。 讨论的低功率转换包括停放磁头和旋转硬盘驱动器。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：GB2494578B

公开(公告)日：2017-11-29

申请号：GB201222539

申请日：2011-05-25

Applicant: IBM

Inventor： JOHN BRUCE CARTER ,  LIXIN ZHANG ,  KARTHICK RAJAMANI ,  WILLIAM SPEIGHT ,  ELMOOTAZBELLAH NABIL ELNOZAHY ,  AHMED GHEITH ,  ERIC VAN HENSBERGEN

IPC: G06F9/54

公开(公告)号：GB2511986B

公开(公告)日：2020-03-04

申请号：GB201411244

申请日：2012-11-21

Applicant: IBM

Inventor： JEFFREY A STUECHELI ,  ERIC EUGENE RETTER ,  KARTHICK RAJAMANI ,  BRUCE MEALEY ,  JOHN BRUCE CARTER

IPC: G06F7/483 ,  G06F5/01

Abstract: Mechanisms are provided for performing a floating point arithmetic operation in a data processing system. A plurality of floating point operands of the floating point arithmetic operation are received and bits in a mantissa of at least one floating point operand of the plurality of floating point operands are shifted. One or more bits of the mantissa that are shifted outside a range of bits of the mantissa of at least one floating point operand are stored and a vector value is generated based on the stored one or more bits of the mantissa that are shifted outside of the range of bits of the mantissa of the at least one floating point operand. A resultant value is generated for the floating point arithmetic operation based on the vector value and the plurality of floating point operands.