Appendix A. CLI setup and configuration 641
If you do not specify the unit parameter, the throttling is based on I/Os instead of throughput
(Example A-7).
Example: A-7 Throttling based on I/O
IBM_4939:FlexSystem_V7000:admin>chvdisk -rate 4000 ESXi-Redbooks
IBM_4939:FlexSystem_V7000:admin>lsvdisk ESXi-Redbooks
id 2
name ESXi-Redbooks
.
.
vdisk_UID 600507680185853FF000000000000011
throttling 4000
preferred_node_id 2
.
.
IBM_4939:FlexSystem_V7000:admin>
To disable I/O throttling, set the I/O rate to 0 (Example A-8).
Example: A-8 Disable I/O throttling
IBM_4939:FlexSystem_V7000:admin>chvdisk -rate 0 ESXi-Redbooks
IBM_4939:FlexSystem_V7000:admin>lsvdisk ESXi-Redbooks
id 2
.
.
vdisk_UID 600507680185853FF000000000000011
throttling 0
preferred_node_id 2
.
.
IBM_4939:FlexSystem_V7000:admin>
FlashCopy example commands
IBM Flex System V7000 Storage Node offers powerful FlashCopy functions, as described in
Chapter 9, “IBM Flex System V7000 Storage Node Copy Services” on page 363. FlashCopy
creation is a process that is often scripted. The commands to create a FlashCopy are easy to
discover if you create a FlashCopy in the GUI, and the CLI commands for your system are
listed when the creation completes.
Example A-9 shows you the required steps to prepare a reverse FlashCopy, and shows you
the FlashCopy command using the “Reverse” option. As you can see at the end of
Example A-9, FCMAP_rev_1 shows a restoring value of yes while the FlashCopy mapping is
copying. After it has finished copying, the restoring value field will change to no.
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