Title :
Graceful Operation of Disk Drives under Thermal Emergencies
Author :
Kim, Youngjee ; Choi, Jeonghwan ; Gurumurthi, Sudhanva ; Sivasubramaniam, Anand
Author_Institution :
Dept. of Comput. Sci. & Eng., Pennsylvania State Univ., University Park, PA
Abstract :
Thermal-aware design of disk-drives is an important concern because high temperatures can cause reliability problems. Hence, dynamic thermal management (DTM) has been proposed to operate the disk at the average case, rather than the worst case by modulating the activities to avoid thermal emergencies at run time while pushing the performance. A delay-based approach to adjust the disk seek activities is one DTM solution for normal disk-drives. Even if it could overcome thermal emergencies without stopping disk activity, it suffers from long delays when servicing the requests. This paper investigates the possibility of using a multi-speed disk-drive which dynamically modulates the rotational speed of the platter (called DRPM) for implementing DTM, Using a detailed performance and thermal simulator of storage system the authors evaluate DTM policies and observe that the DRPM technique is the best to avoid thermal emergencies. However, the authors find that the time taker, to transition between different rotational speeds of the disk is critical to the effectiveness of this DTM technique
Keywords :
disc drives; reliability; thermal management (packaging); disk driven temperature; dynamic thermal management; graceful operation; multispeed disk-drive; platter rotational speed; reliability problems; storage system; thermal emergencies; thermal simulator; thermal-aware design; Disk drives; Disk Drives; Storage System; Temperature Management;
Conference_Titel :
Thermal Issues in Emerging Technologies: Theory and Application, 2007. THETA 2007. International Conference on
Conference_Location :
Cairo
Print_ISBN :
1-4244-0896-2
Electronic_ISBN :
1-4244-0897-0
DOI :
10.1109/THETA.2007.363414