Surface level sparing in disk drives

Details Surface level sparing in disk drives Surface level sparing in disk drives

2006-09-28

2008-12-30

Nguyen, Than (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S004000, C714S006130, C714S006130

Reexamination Certificate

active

07472223

ABSTRACT:
A technique involves accessing a hard disk platter surface using surface virtualization. The technique includes receiving a command to access a hard disk platter surface. The command specifies an address. The technique further includes providing a virtual surface identifier based on the address specified by the command, and generating a particular real surface identifier based on the virtual surface identifier. The particular real surface identifier corresponds to a particular hard disk platter surface among multiple hard disk platter surfaces of a set of disk drives. The technique further includes accessing the particular hard disk platter surface among the multiple hard disk platter surfaces of the set of disk drives based on the particular real surface identifier. Such operation is capable of being carried out within a disk drive controller in a manner that is transparent to a host, or alternatively by the host.

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