z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support
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Constants

z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support
SC23-6866-00

Table 1 summarizes the constants that are related to device type.

Table 1. DASD device characteristics
Device Type 3390 3380
Pages per track (b) 12 10
Blocks per cylinder (cb) 22 19
Tracks per cylinder 15 15
Parent topic: Object databases

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