Dr. Snitzer graduated from the Northeastern Ohio Universities College of Medicine in 1991. He works in Warren, OH and specializes in Internal Medicine. Dr. Snitzer is affiliated with Trumbull Memorial Hospital.
Mikulás Patocka - Prague, CZ Michael A. Snitzer - Shirley MA, US
Assignee:
Red Hat, Inc. - Raleigh NC
International Classification:
G06F 12/00
US Classification:
711114, 711E12001
Abstract:
A method and system for efficiently freeing storage in a Redundant Array of Independent Disks (RAID) system. A computer system is coupled to storage devices that are organized as a RAID with block-level striping. Each storage device is partitioned into multiple physical sectors. The computer system receives a request to free a contiguous range of logical sectors that are mapped to the storage devices. In response, the computer system issues, for each storage device, a discard command to free contiguous physical sectors in the storage device that correspond to non-contiguous logical sectors.
Performing Discard Commands On Raid Storage Devices
- Raleigh NC, US Michael A. Snitzer - Shirley MA, US
International Classification:
G06F 3/06
Abstract:
An example method for performing discard commands on Redundant Array of Independent Disks (RAID) devices may comprise receiving a request to free a range of logical sectors that is mapped to a plurality of storage devices organized as RAID. The method may further comprise identifying a first physical sector number corresponding to a first logical sector having a lowest number greater or equal than a starting logical sector number of the range of logical sectors. The method may further comprise identifying a second physical sector number corresponding to a second logical sector having a lowest number greater or equal than an ending logical sector number of the range of logical sectors. The method may further comprise issuing a single command to all of the plurality of storage devices to free a range of sectors identified by the first physical sector number and the second physical sector number.