System information

VNX™ System Operations94 of 114 Release 7.0

NAS or SAN environment rules

When you connect a SAN configuration to the VNX for file, you create a NAS or

SAN configuration. A NAS or SAN configuration has rules for RAID types, LUN

allocation, and array read or write cache settings that you must consider. Table 10

on page 94 lists these considerations.

If needed, contact the EMC Customer Support or your service provider for help with

template selection. The EMC E-Lab

Interoperability Navigator explains how to

configure CX, CX3, and CX4 storage arrays by using predefined templates and is

available at http://Support.EMC.com. After logging in, go to Support >

Interoperability and Product Lifecycle Information > E-Lab Interoperability

Navigator.

Note: The E-Lab Interoperability Navigator provides information on supported NAS or SAN

environments.

Table 10 VNX for file/VNX for block NAS and SAN environment considerations (page 1 of 3)

Category Considerations

RAID types

• NAS FC LUNs can only be RAID 5, RAID 6, or RAID 1. For ATA

drives, RAID 3, RAID 5, RAID 6, and RAID 1 are supported.

RAID groups containing NAS LUNs are restricted to 4+1 RAID 5, 8+1

RAID 5, 4+2 RAID 6, 6+2 RAID 6, 12+2 RAID 6, or RAID 1 pairs for

Fibre Channel drives.

ATA drives are restricted to 6+1 RAID 5, 4+2, 6+2, or 12+2 RAID 6

and 4+1 or 8+1 RAID 3.

SAS and SATA drives are restricted to 2+1, 3+1, 4+1, 5+1 RAID5,

RAID1/0 (two disks), and 4+2 RAID 6.

LCFC drives are restricted to 6+1 and 4+1 RAID 5, 4+1 and 8+1 RAID

3, and 6+2 and 12+2 RAID 6.

EFD drives are restricted to 8+1 and 4+1 RAID 5.

• The RAID group containing the VNX for file control LUNs must be

configured as a 4+1 RAID 5, and might contain NAS data LUNs only,

which should be on FC drives. No SAN LUNs might be configured

from this RAID group.

• There are no RAID-type restrictions for LUNs on a SAN.

RAID groups consisting of only SAN LUNs might be configured with

any number of disks supported by the VNX for block system.

• On a single shelf, you can configure mixed RAID types.