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Chapter 4. SVA Path Installation 39

Path is installed, be accessed through the SVA Path device file

c81t4d0 (Figure 4-1).

Figure 4-1 SVA Path Device Filename Management

If the target and LUN numbers assigned to the device are different

on each physical path, SVA Path uses the target and LUN number

associated with the lowest numbered HBA. If a device is

originally accessible as

c1t4d0 and c2t2d1, for example, the

c1t4d0 device name has the lower controller number (c1) and

thus SVA Path takes the target (t4) and LUN (d0) number from it

to construct the new device name, c81t4d0.

Host Applications

c81

Virtual

Controller

SVA Path

SVA Path creates a virtual controller and presents

the device to host applications as a single device.

SVA Path sees both device filenames for the

disk as presented by each of the two controllers

Physical

Controller

(HBA1)

Physical

Controller

(HBA2)

t4d0

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Seagate ST39103LC Guida Utente Pagina 49