Work with disk units

Create and update the disk configuration, and display the logical structure information.

This option allows you to do the following from the partition from which DST was entered:

Work with disk configuration.
- Create and update the disk configuration.
- Display the logical structure (disk unit and auxiliary storage pool (ASP) information).
Work with disk unit recovery.

Note: A graphical interface is available for you to use. See Manage disk unit configuration located in the Systems management, Disk pools, Configure and manage disk pools topic in the IBM® eServer™ iSeries® (http://ibm.com/eserver/iseries/infocenter).

Options on the Work with Disk Units display

Options and menu flow for the Work with disk units options vary depending on the system paging environment. For details, see System paging environments. Use Table 1 as a reference during problem analysis and system repair.

Select the Work with disk units option on the Use Dedicated Service Tools display. Options and menu flow for this function vary depending on the paging environment.

Table 1. Paging environments and the work with disk unit options
Paging environment	Work with disk unit options
Stand-alone	Save load-source disk unit data Copy load-source disk unit data Display/change page data Analyze disk unit surface Initialize and format disk unit Reclaim IOP cache storage Stop device parity protection
Limited paging	1. Work with disk configuration Display disk configuration Display disk configuration status Display disk configuration capacity Display disk configuration protection Display non-configured disk units Display device parity status Display disk hardware status Display disk compression status Work with ASP threshold Work with ASP configuration Display disk configuration capacity Delete user ASP Add units to ASP Delete ASP data Change ASP storage threshold Move units from one ASP to another Remove units from configuration Add units to the ASP and balance data Work with mirrored protection Display disk configuration Start mirrored protection Stop mirrored protection Enable remote load-source mirroring Disable remote load-source mirroring Work with device parity protection Display device parity status Start device parity protection Stop device parity protection Include unit in device parity protection Exclude unit in device parity protection Work with disk compression Display disk compression status Start compression on disk units Stop compression of disk units
Limited paging	2. Work with disk unit recovery Save disk unit data Restore disk unit data Replace configured unit Assign missing unit Recover configuration Disk unit problem recovery procedures Initialize and format disk units Display/change page data Analyze disk unit surface Suspend mirrored protection Resume mirrored protection Copy disk unit data Delete disk unit data Upgrade load-source utility Rebuild disk unit data Reclaim IOP cache storage Correct device parity protection mismatch Recover unknown load source Recover mirrored load source Recover from start compression failure Migrate load-source disk unit data
Full paging	Display disk configuration Display disk configuration status Display disk configuration capacity Display disk configuration protection Display non-configured units Display device parity status Display disk hardware status Display disk compression status Work with disk configuration Display disk configuration Add units to ASPs Work with ASP threshold Include unit in device parity protection Enable remote load-source mirroring Disable remote load-source mirroring Start compression on non-configured units Add units to ASPs and balance data Start device parity protection Work with disk unit recovery Replace configured unit Disk unit problem recovery procedures Initialize and format disk units Display/change page data Analyze disk unit surface Suspend mirrored protection Resume mirrored protection Delete disk unit data Rebuild disk unit data Rebuild IOP cache storage