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Basic Storage Service Configuration Guide for Block

OceanStor V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5300 V5, 5500 V5, 5600 V5, 5800 V5, 6800 V5, 5300F V5, 5500F V5, 5600F V5, 5800F V5, 6800F V5, 18500 V5, 18800 V5, 18500F V5, and 18800F V5. It describes the basic storage services and explains how to configure and manage them.

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Block Virtualization Process

Block Virtualization Process

Block virtualization technology enables dynamic allocation and expansion of storage resources in storage pools. Using this technology shortens the response time for data reads/writes in the storage pools and the time needed to reconstruct data on failed disks.

Figure 3-1 Block virtualization process
  1. The storage system groups disks into multiple disk domains. A disk domain may consist of the same or different types of disks. The disk types of a disk domain determine the storage tiers of storage pools.
  2. The storage system divides the storage media in storage tiers into fixed-size CKs.
  3. CKs in a storage tier form CKGs and hot spare space based on the RAID policy and hot spare space policy configured on DeviceManager.
  4. The storage system divides CKGs into extents based on the data migration granularity configured on DeviceManager. The extent is the smallest unit of a thick LUN.
  5. When a user creates a thin LUN, the storage system divides extents into grains and maps the grains to the thin LUN for more precise management over the storage space.
Updated: 2020-01-17

Document ID: EDOC1000181506

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