For NDMP NAS Option to be able to perform backup and restore operations on EMC CLARiiON IP4700 NAS servers, at least one server in the configuration must have tape drives or tape library units attached to it. You must specify the logical device names of the attached devices while configuring the NDMP NAS Option.
These logical device names are automatically assigned to the devices by IP4700 depending on the SCSI settings and the type of each device. The logical device names can also be determined from the Tape Drives menu of the web-based Administrative Interface.
Example: Logical Device Names
The following is an example of a typical Tape Drives information screen:
SP-A (IP4700SPA) HP C1557A U709 /dev/c0b0t6d0 SP-A (IP4700SPA) SCSI Device /dev/c0b0t6d1 SP-B (IP4700SPB) QUANTUM SuperDLT1 1717 /dev/c0b0t3d0 SP-B (IP4700SPB) QUANTUM SuperDLT1 1717 /dev/c0b0t3d0 SP-B (IP4700SPB) SCSI Device /dev/c0b0t5d0
Each line consists of three components:
For example, consider the first line:
SP-A (IP4700SPA) HP C1557A U709 /dev/c0b0t6d0
In this line:
Storage Processor = SP-A (IP4700SPA) Device Description = HP C1557A U709 Logical Device Name = /dev/c0b0t6d0
The last part of the line has the logical device name (in this example, /dev/c0b0t6d0), which is used when you configure the NDMP NAS Option.
The second line in this example is:
SP-A (IP4700SPA) SCSI Device /dev/c0b0t6d1
This has the device description SCSI Device. This device description indicates that this device is a tape library unit, not a regular tape drive. You can use the logical device name to configure the tape library unit on the NDMP NAS Option.
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