Sun Microsystems SL8500 manual 4Adding a Library to the Right

PTP Configuration

Perform audits in a specific sequence to avoid loss or mismatch of VOLIDs. first audit the library with the highest numbered LSMs. The audit process must proceed sequentially from left-to-right, as shown in TABLE 2-4. Audit the newly added library (lowest numbered LSM) last.

TABLE 2-4Adding a Library to the Right

Exiting Libraries		New Library
First Audit	Second Audit	Last Audit
Library A	Library B	Library C
Renumbers LSMs 4-7 to 8-11	Renumbers LSMs 0-3 to 4-7	Assigns LSM numbers 0-3

FIGURE 2-1shows how the libraries are configured when adding a PTP to an exiting library complex.

FIGURE 2-1Adding a PTP to an Existing Library Complex

An existing Library complex has two libraries (A and B), connected with a PTP.

A = The home library contains LSMs 0—3.

B = The away library contains LSMs 4—7

New library C added to the	Pass-thru Port connecting	Existing libraries A and B
left of libraries A and B with	existing libraries A and B	connected with a
a Pass-thru Port		Pass-thru Port

New library C added to the right of libraries A and B with a Pass-thru Port

		C
					B
	LSM 8			LSM 8
9
			9
10
11			10
			11

Front		Front
	L203 875
		L203 876

In this example, adding another library (C) to the left of the library complex increases the LSM numbering sequentially. This is the preferred method.

In this example, adding another library (C) to the right of the library complex requires a reconfiguration of LSM numbering.

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