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Product Description 15

OceanStor 5300 V3, 5500 V3, 5600 V3, 5800 V3, and 6800 V3 Storage System V300R003

This document introduces the storage system from the aspects of the market position, features, architecture, technical specifications, production configuration, environment requirement, standard compliance, and granted certifications.
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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 or more disks as coffer disks. Table 4-75 describes capacity partitions of the built-in coffer disks.

Table 4-75  Capacity partitions of built-in coffer disks

Built-in Coffer Disk

5300 V3

5500 V3

5600 V3

5800 V3

6800 V3

Description

Size

1 x 64 GB mSATA disk

1 x 64 GB mSATA disk

1 x 64 GB mSATA disk

2 x 64 GB mSATA disk

1 x 200 GB SSD

The flushing speed of each mSATA disk is 50 MB/s. The flushing speed of each SSD is 300 MB/s.

Cache dirty data partition

21 GB

21 GB

32 GB

32 GB

64 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.

CCDB partition

2 GB

Stores the user configuration information (such as user configuration data of remote replication, HyperMetro, and NAS data).

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

If a storage system employs the disk and controller separation architecture, the first four disks in the first disk enclosure are configured as coffer disks. If a storage system employs the disk and controller integration architecture, the first four disks in the storage system are configured as coffer disks. SAS, NL-SAS, or SSD disks can be used as coffer disks. The type of the four coffer disks must be the same.

Appearance

Figure 4-116 and Figure 4-117 show the appearance of a coffer disk.
Figure 4-116  2.5-inch coffer disk

Figure 4-117  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
  • If a storage system employs the disk and controller integration architecture, the first four disks in the storage system are configured as coffer disks. Figure 4-118 uses a 2 U controller enclosure with 25 disk slots as an example.
    Figure 4-118  Positions of external coffer disks in the disk and controller integration architecture

  • If a storage system employs the disk and controller separation architecture, the first four disks in the first disk enclosure are planned as coffer disks. In OceanStor 6800 V3, the first four disks in the first disk enclosure connected to controllers A and B are coffer disks, and the first four disks in the first disk enclosure connected to controllers C and D are coffer disks. Figure 4-119 uses a 2 U disk enclosure with 25 disk slots as an example.
    Figure 4-119  Positions of external coffer disks in the disk and controller separation architecture

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 4-76 describes capacity partitions of external coffer disks.
Table 4-76  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 remote replication, HyperMetro, and NAS data). 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: 2019-02-01

Document ID: EDOC1000084184

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