## Dynamic volume expansion 

A volume can be expanded without removing the data within the volume. You can specify a new capacity by using the chckdvol  command, as shown in Example 12-65. The new capacity must be larger than the previous capacity. You cannot shrink the volume . 

dscli> chckdvol -cap 30051 EF00 CMUC00332W chckdvol: Some host operating systems do not support changing the volume size. Are you sure that you want to resize the volume? [y/n]: y CMUC00022I chckdvol: CKD Volume EF00 successfully modified. 

Because the original volume used the rotateexts  attribute, the additional extents are also striped, as shown in Example 12-66. 

dscli> showckdvol -rank EF00 Name ITSO_EF00 ID EF00 accstate Online datastate Normal configstate Normal deviceMTM 3390-9 volser - datatype 3390 voltype CKD Base orgbvols - addrgrp E extpool P1 exts 27 cap (cyl) 30051 cap (10^9B) 25.5 cap (2^30B) 23.8 ranks 1 sam Standard repcapalloc - eam managed reqcap (cyl) 30051 cap (Mod1) 27.0 realextents 27 virtualextents 4 realcap (cyl) 30051 migrating 0 migratingcap (cyl) 0 perfgrp PG0 migratingfrom - resgrp RG0 tierassignstatus - tierassignerror - tierassignorder - tierassigntarget - %tierassigned 0 etmonpauseremain - etmonitorreset unknown 

