Huawei SmartDC V100R021C10 User Manual page 204

ECC800 Data Center Controller
User Manual
Procedure
Step 1 Log in to the OMU portal of the VCN.
Step 2 Choose Local Configuration > Local Disk.
Step 3 In the upper-right corner of the RAID Groups area, click Initial disk.
Figure 6-52 Initializing disks
Step 4 Choose whether to create a RAID group. To set disks as a RAID group, select
RAID5. To set disks to work independently, select NON-RAID.
Table 6-33 Disk modes
Disk Mode
RAID5
NON-RAID
Step 5 (Perform this step only when the RAID mode is set to RAID5.) Select RAID
configuration. This step uses Recommended configuration as an example.
Issue 04 (2021-10-09)
Description
In RAID 5 mode, all disks form a RAID 5 group. At least
three disks need to be configured for the VCN. The data
storage reliability is high, but the disk space usage is lower
than that in non-RAID mode.
RAID 5 has the following two configuration modes:
● Recommended configuration: More than three disks
are required. One of the disks is used as a hot spare disk.
In normal cases, the hot spare disk does not store data.
When a disk in the RAID group is faulty, the hot spare
disk replaces the faulty hard disk to join the RAID group.
Therefore, the recommended configuration mode has
lower disk space usage but higher data storage
reliability than the economical configuration mode.
● Economical configuration: Three or more disks are
required, and no hot spare disk is configured. The
economical configuration mode has higher disk space
usage but lower data storage reliability than the
recommended configuration mode.
If disks work independently, recording data is stored into
two disks in sequence, ensuring high disk usage. However,
the data storage reliability of disks that work independently
is lower than that of RAID 5.
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