SANRAD V-Switch Creating a Concatenated Volume, Volume create concatenated, Vol Nbc, Concat1

The V-Switch supports a maximum of 512 volumes.

Creating a Concatenated Volume

To accommodate large volumes of data or to best utilize small volumes spread over several disks, you can concatenate physical volumes across storage devices to create a larger virtual volume.

In Figure 43, the volume is divided into two equitable chunks to be mapped across two disks. Data blocks 1 – 4 are mapped to Disk 1, blocks 13 – 16. Data blocks 5 – 8 are mapped to Disk 2, blocks 13 – 16.

Virtual

Volume

Concatenated

Volume

B1	B2	B3	B4
B5	B6	B7	B8

		Disk 1
Physical	S1	S2	S3	S4
Volume	S5	S6	S7	S8
	S9	S10	S11	S12
	S13	S14	S15	S16

	Disk 2
S1	S2	S3	S4
S5	S6	S7	S8
S9	S10	S11	S12	10023
S13	S14	S15	S16

Figure 43. Concatenated Volume Block Distribution

volume create concatenated

You need to define four parameters to create a concatenated volume:

SWITCH PARAMETER DEFINITION STATUS EXAMPLE

-vol

–nbc

VOLUME NAME	USER-ASSIGNED	MANDATORY	Concat1
	VOLUME NAME
NUMBER OF	NUMBER OF	OPTIONAL	3
CHILDREN	VOLUMES OR	DEFAULT: 2
	CHILDREN FROM
	WHICH TO BUILD
	STRIPED VOLUME

–ch

–ch

–ch

CHILD	FIRST VOLUME	MANDATORY
	(CHILD) TO
	COMBINE
CHILD	SECOND VOLUME	MANDATORY
	(CHILD) TO
	COMBINE
CHILD	N VOLUME (CHILD)	MANDATORY
	TO COMBINE

Simple5

Simple12

Simple14

Chapter 6: Volume Configuration 95