Managing data in a multi-level raid storage array

Details Managing data in a multi-level raid storage array Managing data in a multi-level raid storage array

2005-05-24

2005-05-24

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

Reexamination Certificate

active

06898667

ABSTRACT:
A system and methods implemented within a multi-level RAID (redundant array of independent disks) storage array operate to initially write data to a lower performing RAID level within the array. In addition, data is migrated between lower and higher performing RAID levels via data migration processes that function as background processes. Benefits of the disclosed system and methods include a non-disruptive environment for servicing host I/O (input/output) requests. Array response times are significantly reduced by not allowing initial data writes to interfere with higher performing RAID levels and by migrating data between lower and higher performing RAID levels in the background when the array is less busy servicing host I/O requests.

REFERENCES:
patent: 5392244 (1995-02-01), Jacobson et al.
“The Authoritative Dictornary of IEEE Standards Terms”, IEEE Press, 2000, Seventh Edition, p. 1243.*
Microsoft Computer Dictionary, Microsoft Press, Fourth Edition, p. 357.

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