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Advanced O&M Command Reference

OceanStor 2800 V5 V500R007

This document is applicable to OceanStor 2800 V5. Based on the CLI, this document describes how to use various commands classified by functions and how to set the CLI and manage the storage system through these commands. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.

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cache show chunk

cache show chunk


The cache show chunk command is used to view the details about cache chunks.


cache show chunk layer chunktype all volumeId filter [ tpvalue ] [ num ]

cache show chunk v chunktype detail volumeId lba

cache show chunk s chunktype detail volumeId ckgObjId lba





layer Range of cache informat that you want to view.

The value can be v or s.

v: volume cache.

s: stripe cache.

chunktype Chunk type.

The value can be r or w.

r: read chunk.

w: write chunk.

all All information.


volumeId Volume ID.

The value ranges from 0 to 2^64 - 1.

filter Chunk type.

The value can be all, dirty,fault, logfault, dsg,forcemirror,ref,writeref,through, forcedsg,hasmultp, or tp.

tpvalue Time point of chunk.

The value ranges from 0 to 2^64 - 1.

num Number of displayed items.

The value is an integer larger

than 0.

v Volume cache.


s Stripe cache.


detail Details.


lba Logical block addressing(LBA).

The value ranges from 0 to

2^64 - 1.

ckgObjId Chunk group (CKG) object ID.

The value ranges from 0 to 2^64 - 1.


Diagnostic view

Usage Guidelines



View first 10 items of information about volume cache read dirty chunks in volume 0.

admin:/diagnose>cache show chunk v r all 0 dirty 10
all chunk in vol[0x0]
chunkId 0 ~ 10 : 0 512 1024 1536 2048 2560 3072 3584 4096 4608
total chunk: 10

System Response


Updated: 2020-01-17

Document ID: EDOC1000181575

Views: 730304

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