1、Lessons Learned Entry: 1129Lesson Info:a71 Lesson Number: 1129a71 Lesson Date: 1999-02-01a71 Submitting Organization: HQa71 Submitted by: David M. LengyelSubject: Computer Hardware-Software/International Space Station/Command and Data Handling (C&DH) Upgrades Description of Driving Event: Need to Up
2、grade International Space Station (ISS) Command and Data Handling (C&DH) Components as Soon as PossibleLesson(s) Learned: The planning process for computer upgrades for the ISS has begun. Several possible upgrades are being discussed, such as replacing the Mass Memory Unit, upgrading the processor,
3、upgrading the compiler used, and replacing the Portable Computer Systems (PCS).Recommendation(s): NASA should proceed with the upgrade of ISS computer components expeditiously. In particular, the replacement of the mass storage device with solid-state memory should be made as soon as possible.Eviden
4、ce of Recurrence Control Effectiveness: NASA concurs with the recommendation. A change request is currently being processed to retro-fit the solid state mass memory into the MDMs. The intent is to make the hardware change prior to flight of the MDMs.Documents Related to Lesson: Provided by IHSNot fo
5、r ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorate(s): a71 Exploration Systemsa71 Space Operationsa71 Aeronautics ResearchAdditional Key Phrase(s): a71 Aerospace Safety Advisory Panela71 Computersa71 Information Technology/Systemsa71 Softwarea71 SpacecraftAdditional Info: Approval Info: a71 Approval Date: 2002-02-25a71 Approval Name: Bill Loewya71 Approval Organization: HQa71 Approval Phone Number: 202-358-0528Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
