公开(公告)号：AU2003252181A1

公开(公告)日：2004-02-25

申请号：AU2003252181

申请日：2003-07-28

Applicant: NETWORK APPLIANCE INC

Inventor： SRINIVASAN MOHAN ,  PAWLOWSKI BRIAN ,  BOLEN DAVID BRITTAIN ,  LEWIS BLAKE H ,  RAJAN VIJAYAN

IPC: G06F13/10 ,  G06F20060101 ,  G06F3/06 ,  G06F12/00 ,  G06F17/30

Abstract: A method and apparatus are disclosed for restoring a virtual disk (vdisk) in a data storage system as the vdisk was at an earlier time. Pointers are maintained to point to data represented by the vdisk. The pointers are saved to persistent storage at the earlier time. The data at the earlier time is maintained on the data storage device. A pointer pointing to data represented by the vdisk at a later time is compared with the pointers saved at the earlier time. If the pointer from the later time matches the pointer saved at the earlier time, keeping the pointer from the later time in the active file system. If the pointer from the later time does not match the pointers saved at the earlier time, copying a set of pointers associated with the pointer saved at the earlier time to the active file system.

公开(公告)号：EP1543424A4

公开(公告)日：2006-07-05

申请号：EP03784834

申请日：2003-07-28

Applicant: NETWORK APPLIANCE INC

Inventor： RAJAN VIJAYAN ,  SRINIVASAN MOHAN ,  PAWLOWSKI BRIAN ,  BOLEN DAVID BRITTAIN ,  LEWIS BLAKE H

IPC: G06F12/00 ,  G06F13/10 ,  G06F20060101 ,  G06F3/06 ,  G06F17/30

CPC classification number: G06F3/0605 ,  G06F3/0614 ,  G06F3/0644 ,  G06F3/0665 ,  G06F3/067 ,  G06F17/30067 ,  Y10S707/99938 ,  Y10S707/99953

Abstract: As seen in Figure 1, a storage virtualization selection technique “automates” a virtualization selection process to create virtual disk (vdisk) storage objects over a volume (150) & (160) of a file system implemented by a storage operating system (200) of a multi-protocol storage appliance (100). The file system provides a virtualization system that aggregates physical storage of a set of disks (130) or portions (e.g., extents) of disks into a pool of blocks that can be dynamically allocated to form a vdisk. The file system also provides reliability guarantees for the vdisks in accordance with its underlying architecture. That is, the file system organizes its storage within volumes created among the managed disks. The vdisk is thereafter created as a storage object within a volume and inherits the underlying reliability configuration associated with that volume.