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Product Description

OceanStor 2800 V3 V300R006

This document is applicable to OceanStor 2800 V3. It describes the positioning, features, typical applications, architecture, specifications, environmental requirements, standards compliance, and granted certifications of the OceanStor 2800 V3 storage system.
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Coffer Disk

Coffer Disk

The storage system has two kinds of coffer disks: built-in coffer disk and external coffer disk. Coffer disks are used to store three types of data: cache data requiring power failure protection, OceanStor OS system data, and system configuration information and logs.

Built-in Coffer Disk

Each controller houses one SSD disk (64 GB) to store system data. Table 4-24 describes capacity partitions of the built-in coffer disks.

Table 4-24 Capacity partitions of built-in coffer disks

Partition Name

Partition Size

Description

Cache dirty data partition

21 GB

Stores the cache dirty data that has not been written into a disk when the storage system is powered off.

OS system partition

8 GB

Stores the OceanStor OS system data.

Cluster Configuration Database (CCDB) partition

2 GB

Stores the user configuration information (such as user configuration data of features).

LogZone partition

2 GB

Stores system logs and run logs when the storage system is powered off and write through is enabled.

DB partition

1 GB

Stores the user configuration information (such as information about the LUN capacity, ID, WWN, Fibre Channel ports, and iSCSI ports).

External Coffer Disk

The first four disks in the storage system are configured as coffer disks. SAS disks can be used as coffer disks. The type of the four coffer disks must be the same.

Appearance

Figure 4-44 shows the appearance of a coffer disk.

Figure 4-44 3.5-inch coffer disk

1

Disk module label

2

Disk module handle

3

Coffer disk label

4

Disk module latch

5

Alarm/Location indicator of the disk module

6

Running indicator of the disk module

7

Disk tray

8

Disk

Positions

Figure 4-45 shows the positions of the first four disks in the storage system.

Figure 4-45 Positions of external coffer disks

Capacity partitions: For the four disks, each spares 5 GB of space to form a RAID 1 group. The rest of the coffer disk space can be used to store service data. Table 4-25 describes capacity partitions of external coffer disks.

Table 4-25 Capacity partitions of external coffer disks

Partition Name

Partition Size

Description

CCDB partition

2 GB

Stores the user configuration information (such as user configuration data of features). The four coffer disks are mirrors of each other for redundancy.

LogZone partition

2 GB

Stores system logs and run logs when the storage system is powered off and write through is enabled. The four coffer disks are mirrors of each other for redundancy.

DB partition

1 GB

Stores the user configuration information (such as information about the LUN capacity, ID, WWN, Fibre Channel ports, and iSCSI ports). The four coffer disks are mirrors of each other for redundancy.

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Updated: 2019-07-12

Document ID: EDOC1000138808

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