D-Link DSN-3400-10 User's Manual for DSN-3200-10 Valid for firmware 1.6.1 - Page 60

Table 5-4 Create Volume Wizard - Access and Efficiency Settings Screen Settings Setting Access Bandwidth Weight Storage Efficiency Hint Description Specifies how much bandwidth the volume will use (i.e., how much initiator I/O activity can be expected for the volume). The larger the number, the greater the I/O. Select a large volume to have the initiators achieve fast access to the volume compared to the other volumes on xStack Storage Array. A large value selects a larger number of stripe members. The method the xStack Storage Array uses to select the organization and number of members is described in Table 5-5. Specifies the xStack Storage Array's member count selection. A large value increases disk space more efficiently (i.e., uses less space for redundancy data) and requests a larger number of members (which costs less space for parity overhead). Table 5-5 Volume Organization and Members Based on Redundancy and Access Bandwidth Weight Redundancy Access Bandwidth Weight Value 0 1 Large Values None JBOD organization (1 member) Stripe organization with 2 members Stripe organization with more members Mirror Mirror organization (2 members) Mirrored stripe organization with 2 Mirrored stripe organization with stripe members more stripe members Parity Parity organization with 3 members In combination with the Storage Efficiency Hint, this selects Parity organization with more members In a mirrored stripe organization, there are always two members for each stripe member to allow for the duplicate copy of the data. After a volume is created, you can use the Advanced tab to write-protect the volume and suppress Synch Cache commands from the host (see 5.4.1.4). 5.4.1.1.2 Creating Volumes Manually The following procedure describes how to create volumes manually. With this method, you select the organization and other parameters, and specify drives that can be used for the volume. The xStack Storage Array then finds the storage space on the given drives to allocate and create the Volume. As you create volumes, record the information in Appendix B. 1. In the Logical Resources tab, click the plus sign next to Blade A Base Pool. All drives available for volume creation appear under Blade A Base Pool. 2. In the Logical Resources tab, click the plus sign next to Available Pool. 3. If drives to be used for this volume are not already in the Blade A Base Pool, those drives need to be moved to that Pool. To do this, drag one of the desired drives from Available Pool to Blade A Base Pool. Repeat this step for each additional drive that you want included in the volume. 4. In the Logical Resources tab, click Blade A Base Pool. 60 Chapter 5 Configuring the xStack Storage Array