HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Reference (OS 3.1 - Page 114

NOTES • For this command: ◦ KB = 1024 bytes ◦ MB = 1048576 bytes ◦ GB = 1073741824 bytes • When using the createcpg command, the size of the logical disk space created is the first integer multiple of the RAID set size that is large enough to accommodate the requested virtual volume size. For example, with the default RAID-5 layout with a set size of 768 MB, a requested virtual volume size of 8192 MB causes the creation of logical disks with a total size rounded up to an integer multiple of 768 that is 8448 MB. The growth increment of CPGs is similarly rounded up because the growth is done by creating logical disks that must be created in units of the logical disk RAID set size. See the HP 3PAR StoreServ Storage Concepts Guide for further details. • By default, logical disk are created using only physical disks with the same device type. (By default, the Fibre Channel device type is used). Use the -p devtype NL or -p -devtype SSD option to override this default. Use the showpd command to see the device types of physical disks in the system. • The options -sdgs, -sdgl and -sdgw control the auto logical disk creation for the Common Provisioning Group's (CPG) snapshot data regions. Auto logical disk creation occurs when the amount of free logical disk space falls below the specified grow (enlarge) size setting options (-sdgs, -sdgl). • If no device type is specified using the -p -devtype option, Fibre Channel is assumed. 114 Create Commands