HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Reference (OS 3.1 - Page 147

This constrains the export of a volume to one host or one host cluster (when cluster names can be used as a host name). no_one_host This policy should only be used when exporting a VV to multiple hosts for use by a cluster-aware application, or when "port presents" VLUNs are used. This is the default policy setting. tp_bzero Specifies that if a host write results in the allocation of a new data page that is only partially filled by the host write, then a zero-fill is performed on the unwritten portion of the data page. This ensures that the host cannot read data from deleted volumes or snapshot. The allocation page size is 16 KB. This is the default policy setting. no_tp_bzero Specifies that the zero-fill operation is bypassed on the allocation of partially written data pages. zero_detect This policy enables the HP 3PAR Storage System to scan for zeros in the incoming write data. This feature when used during physical copy to a TPVV will avoid allocating space for blocks containing zero. This feature when used with a Thin Persistence license will reclaim allocated space when zero blocks are written to the TPVV. This policy is only applicable for the base TPVV. NOTE: Thin Persistence can have some performance implications during extremely busy system conditions. HP recommends the zero_detect policy only be enabled during Thin Persistence and Thin Conversion operations. The zero_detect policy should be disabled during normal operation. no_zero_detect This policy disables the HP 3PAR Storage System to scan for zeros in the incoming write data to reclaim allocated space on the volume. This is the default policy setting. SPECIFIERS Specifies the CPG name of the user space of the TPVV. If the CPG name is to be taken from a template, this field should be (-). [.] Specifies the VV name up to 31 characters in length. If the -cnt option is used, the optional decimal number specifies the name of the first VV (.). The is incremented by 1 for each subsequent VV. The must be an integer from 0 to 999999. All VV names have the same length constraint. [g|G|t|T] Size for the VV in MB (maximum of 16 T, minimum of 256 MB). The volume size is rounded up to the next multiple of 32 MB. The size should be an integer. An optional suffix (with no white space before the suffix) will modify the units to GB (g or G suffix) or TB (t or T suffix). If the size is to be taken from a template, this field should be (-). RESTRICTIONS Use of this command requires a Thin Provisioning license. Contact your local HP 3PAR representative for information. EXAMPLES The following example displays the creation of a TPVV named tpvv1: cli% createtpvv -usr_aw 50 -usr_al 75 cpg1 tpvv1 1g createtpvv 147