Chapter 11. Advanced Copy Services 459
11.1.13  FlashCopy and image mode Volumes
FlashCopy can be used with image mode volumes. Because the source and target volumes 
must be the same size, you must create a target volume with the same size as the image 
mode volume when you are creating a FlashCopy mapping. To accomplish this task with the 
CLI, use the svcinfo lsvdisk -bytes volumename command. The size in bytes is then used 
to create the volume that is used in the FlashCopy mapping.
This method provides an exact number of bytes because image mode volumes might not line 
up one-to-one on other measurement unit boundaries. Example 11-1 shows the size of the 
ITSO-TSTRS001 volume. The ITSO-TSTRS002 volume is then created, which specifies the same 
size. 
Example 11-1   Listing the size of a volume in bytes and creating a volume of equal size
IBM_Storwize:ITSO-V7k:superuser>lsvdisk -bytes ITSO-TSTRS001
id 19
name ITSO-TSTRS001
IO_group_id 0
IO_group_name io_grp0
status online
mdisk_grp_id 0
mdisk_grp_name Pool0
capacity 1073741824
type striped
......
IBM_Storwize:ITSO-V7k:superuser>mkvdisk -mdiskgrp 0 -iogrp 0 -size 1073741824 
-unit b -name ITSO-TSTRS002
Virtual Disk, id [20], successfully created
IBM_Storwize:ITSO-V7k:superuser>
IBM_Storwize:ITSO-V7k:superuser>lsvdisk -delim " "
19 ITSO-TSTRS001 0 io_grp0 online 0 Pool0 1.00GB striped     
6005076400A7015B0800000000000016 0 1 not_empty 0 no 0 0 Pool0 yes no 19 
ITSO-TSTRS001
20 ITSO-TSTRS002 0 io_grp0 online 0 Pool0 1.00GB striped     
6005076400A7015B0800000000000017 0 1 not_empty 0 no 0 0 Pool0 yes no 20 
ITSO-TSTRS002
IBM_Storwize:ITSO-V7k:superuser>
11.1.14  FlashCopy mapping events
This section describes the events that modify the states of a FlashCopy. It also describes the 
mapping events that are listed in Table 11-6 on page 460.
Tip: Alternatively, you can use the expandvdisksize and shrinkvdisksize volume 
commands to modify the size of the volume. 
These actions must be performed before a mapping is created.