StorageTek 6 manual Scratch Redistribution, expnumlsm

Scratch Redistribution

The expected number can be determined as follows:

totcellslsm

expnumlsm = totscracs *

totcellsacs

where:

expnumlsm

expected number of scratches for each LSM.

totscracs

total number of scratches in the ACS.

totcellslsm

total number of cells in the LSM.

totcellsacs

total number of cells in the ACS.

In the previous example, the 4410 should have a range 470-530 scratches and the 9360 a range of 70-130. To determine the BALtol range

BALtol range = expnumlsm	+ baltol / 1000 * totscracs
	-
	2

where:

BALtol range

range of balance tolerance value.

expnumlsm

expected number of scratches for each LSM (see above).

baltol

user-supplied percent value (tolerance-value) that specifies when scratch cartridge redistribution ends.

totscracs

total number of scratches in the ACS.

MEDia

optionally, specifies the type of cartridge to redistribute across the ACS.

Note: The SL8500 library supports only the T9x40 (9840/T9840B/T9840C and T9940A/T9940B) media types and recording techniques.

Valid media types are:

Chapter 4. Utility Functions 287

1st ed., 6/30/04 - 312579601