Deployment Guide

• All four iSCSI host ports must be configured to use different individual subnets.
• Two of the four iSCSI host ports can be used for additional block level iSCSI access by other hosts.
NOTE: The NX3600 connects to two of the four ports configured.
Enabling Jumbo Frames On The MD Storage Array
To enable jumbo frames on all the iSCSI ports on the MD storage array:
1. In the PowerVault MDSM, select the Hardware tab.
2. Right-click the relevant controller.
3. Select Configure > iSCSI Ports.
The Configure iSCSI Ports screen is displayed.
4. Click Advanced Port Settings.
The Advanced Port Settings screen is displayed.
5. Select Enable jumbo frames.
6. In MTU size enter, 9000.
7. Enable jumbo frames for each iSCSI port on the MD storage array.
NOTE:
On MD32 x 0i arrays, the configuration is done on ports dedicated to NAS.
Considerations When Creating Disk Groups And
Virtual Disks
Consider the following when creating disk groups and virtual disks.
One Disk Group (RAID 6), One Hot Spare
Space
This option consists of one RAID 6 disk group with two virtual disks and a single hot spare. The single RAID 6 disk
group is made up of eleven, 2 TB hard drives. In RAID 6, the total available space for virtual disks is 18 TB as two
hard drives are allocated for parity. The NAS cluster requires pairs of equal sized virtual disks. Therefore, the disk
group is divided into two 9 TB virtual disks to evenly utilize all available space in the disk group. You now have 18
TB space to allocate for the NAS cluster.
High Availability A RAID 6 disk group can continue to execute read and write requests to all its virtual disks after any two
concurrent disk failures. As long as there is enough time to rebuild between failures, with the hot spare, there can
be three concurrent disk drive failures before read and write requests cannot be executed.
18 Setting Up Your MD Storage Solution