Storage System User Manual
21
RAID is made of RAID 0 and RAID 5 which requires
at least 6 even HDDs.
4. Select Array Block Size(KB) in drop-down list.
5. Select I/O Priority as Performance Priority, Protection Priority, Balanced, or Smart.
Performance Priority: To guarantee external IO task performance, internal IO task is totally stopped.
Protection Priority: To guarantee internal IO task performance, external IO task would only take the
rest channel.
Balanced: When both internal and external IO task exist, Balance ensures internal IO task occupy certain
channel without influencing external IO task.
Smart: Without external IO task, array is initialized in the highest speed. Or array is initialized in the
lowest speed.
If RAID level is RAID 0, I/O priority is unavailable.
6. Select the Available HDDs to create RAID.
Or select Available arrays to create RAID.
Or select the combination of Available HDDs and Available arrays.
Only enterprised HDDs are listed in Auailable HDDs list.
In order to increase the performance of created RAID, it is recommended to use HDDs of the same
model and capacity when creating a RAID.
7. Click OK to create array. The successfully created array lists in Array information list. Once created, the array
starts initializing.
3.2.2 Array Exception
Purpose:
If HDD failure occurs, array degrades. When more HDDs fail, array fails. Degraded array can keep working. However,
failed array cannot work. Notification area will notify you once array degraded or failed. Refer to following table for
array degraded and failed condition.
Table 3. 4 Array Degraded Condition
More than three HDDs fail.
Two HDDs fail in either contained RAID.
If array in storage pool degrades, physical volume degrades.
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