Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 45)

Connecting the cluster to two PowerVault storage systems is similar to connecting the cluster to a single PowerVault storage
system. Connect PERC card channel 0 in each node to the back of the first storage system. Repeat the process for channel 1
on the PERC card in each node using a second PowerVault storage system.
With dual storage systems connected to a single PERC card, mirroring disk drives from one storage system to another is
supported through RAID 1 and 1+0. To protect the cluster applications and your data if an entire storage system fails, Dell
strongly recommends using RAID 1 (mirroring) or 1+0 (mirroring and striping).
NOTE: If you have dual cluster-enabled PERC cards (four channels) and only two shared storage systems, you may
want to connect one storage system to each controller. If the cable connections are removed, you must reconnect the
cables as they were previously connected. To ensure that the cables are reconnected correctly, Dell recommends that
you tag or color-code the cables.
Figure 3-7 shows two PowerVault 21xS storage systems cabled to a PERC on a PowerVault 770N NAS cluster.
Figure 3-8 shows two PowerVault 22xS storage systems cabled to a PERC on a PowerVault 770N NAS cluster.
Figure 3-9 shows two PowerVault 21xS storage systems cabled to a PERC on a PowerVault 775N NAS cluster.
Figure 3-10 shows two PowerVault 22xS storage systems cabled to a PERC on a PowerVault 770N NAS cluster.
Figure 3-7. Cabling Two PowerVault 21xS Storage Systems to a PowerVault 770N NAS SCSI Cluster
Figure 3-8. Cabling Two PowerVault 22xS Storage Systems to a PowerVault 770N NAS SCSI Cluster