SANRAD V-Switch manual Creating a Subdisk LUN Carving, Subdisk create, 18000000, Subdisk1

The V-Switch supports a maximum of 512 subdisks.

Creating a Subdisk (LUN Carving)

You can create one or more subdisks on a physical disk. The subdisks can then be converted to simple volumes to be used for creating concatenated, striped and mirrored virtual volumes. When you create a subdisk, only the defined area is converted into a subdisk. You must individually convert each disk area into a subdisk for the physical volume to be usable by the Volume Manager.

Disk	Disk	Disk
	Subdisk 1	Simple 1
	Subdisk 2	Simple 2
	Subdisk n	Simple n

10065

Figure 37. Partitioning a Physical Volume

subdisk create

You need to define four parameters to create a subdisk

SWITCH PARAMETER DEFINITION STATUS EXAMPLE

-d

–sl

–sa

DISK ALIAS	ALIAS OF DISK TO	MANDATORY	Disk1
	SPLIT
SPLIT LENGTH	LENGTH IN	MANDATORY	18000000
	BLOCKS OF	(1 BLOCK =
	SUBDISK	512 BYTES)
START ADDRESS	BLOCK TO BEGIN	OPTIONAL	0
	COUNTING THE	DEFAULT: 0

SUBDISK LENGTH

FROM

–sd	SUBDISK ALIAS	USER-ASSIGNED	OPTIONAL	Subdisk1
		ALIAS FOR SUBDISK	DEFAULT:
			DEF_SPLIT_
			CLUSTER NO_
			DISK NO_END
			ADDRESS IN
			BLOCKS

Example:

In Figure 38, page 91, you see Disk 1 before a subdisk is created on it.

90 SANRAD V-Switch User Manual