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Chapter 8 Disk Array Configuration Setting (S100/S1100/S1200/S1300/S2100/S2200/S2300)
IV-129
Example: In the event of a single DE with 15 PDs in the DE, these values are as shown in the table below.
Table 8-3 Number of Unused PDs
RANK Setting Number of Spares Number of Created RANKs Number of Unused PDs
High Reliability RAID1 (1+1) 1 7 0
Standard RAID5 (4+P) 1 2 4
Standard RAID5 (4+P) 2 2 3
(B) Information About RANK
y RANK Type: RAID type and the number of PDs which bind the RANK
High reliability RAID1 (1+1): Mirroring configuration based on two PDs
Standard RAID5 (4+P): Striping configuration based on five PDs
Large capacity RAID5 (6+P): Striping configuration based on seven PDs
Huge capacity RAID5 (8+P): Striping configuration based on nine PDs
y Number of RANKs: Number of RANKs to bind
y Total RANK Capacity: Total capacity of RANKs to bind
y Total Unused RANK Capacity: Capacity of the free space for LD Binding in the RANK to bind. If the LD
Capacity is automatically calculated, it is basically 0 here.
(C) Information About LD
y LD Capacity: Capacity of a single LD to bind
y Total Number of LDs: Total number of LDs to bind
Not the number of LDs per RANK but the total number of LDs to bind
y Total LD Capacity: Total capacity of all the LDs to bind
LD Capacity × Total Number of LDs = Total LD Capacity
(D) Information About LD Ownership
The ownership of the LDs to bind is displayed. Fixed to controller 0.
The Ownership is valid only when Cross Call is OFF. To set the LD Ownership to controller 1 when Cross Call is
ON, use “Change Ownership” after binding or specify the controller on “Individual Bind of LD” and perform
binding.