HP StorageWorks XP12000 HP StorageWorks XP Disk Array Configuration Guide: IBM - Page 43

Parameter fg g partition fragment size fh h partition fragment size See Notes for disk parameters. OPEN-E 1,024 1,024 Emulation Type OPEN-E*n (n=2 to OPEN-E CVS 36) 1,024 1,024 1,024 1,024 OPEN-E CVS*n (n=2 to 36) 1,024 1,024 Notes for disk parameters 1. The value of pc is calculated as follows: pc = nc * nt * ns The nc of OPEN-x CVS corresponds to the capacity specified by SVP or remote console. The CVS size of OPEN-x is specified by capacity (megabyte), not by number of cylinders. The number of cylinders of an OPEN-x CVS volume can be obtained by the following calculation ( ... means round up to integer). The number of cylinders = (specified capacity in megabytes from SVP or remote console) x 1,024 / 720 . Example When 37 MB is specified for an OPEN-3 CVS volume from SVP, the number of cylinders of the OPEN-3 CVS can be calculated as follows: 37 x 1,024 / 720 = 52.62 52.62 = 53 The OPEN-3 CVS volume has 53 cylinders. 2. The value of pa must be equal to or more than 131,072. 3. The number of cylinders of a Logical Unit Size Expansion (LUSE) composed of OPEN-x CVS volumes corresponds to the capacity specified by the SVP or the remote console. CVS size of OPEN-x is specified by the capacity (megabytes), not by the number of cylinders. The number of cylinders of the OPEN-x CVS volume can be obtained by the following calculation ( ... means round up to integer): The number of cylinders = (specified capacity in megabytes from SVP or remote console) x 1,024 / 720 x n where n is the number of concatenated volumes for LUSE. Example When 37 MB is specified for the OPEN-3 CVS volume and the four volumes are concatenated, the number of cylinders of the OPEN-3 CVS can be calculated as follows: 37 x 1,024 / 720 x 4 = 52.62 x 4 = 53 x 4 = 212 The LUSE for the OPEN-3 CVS volume has 212 cylinders. XP Disk Array Configuration Guide for IBM AIX 43