3PAR InForm® OS 2.3.1 Concepts Guide (320-200112 Rev B, February 2010)

7.3
Spare Chunklets
InForm OS Version 2.3.1 3PAR InForm OS Concepts Guide
automatically. Free chunklets are any chunklets that are not already allocated for use by
logical disks.
■ For automatic relocations, the system uses up a maximum of one disk worth of chunklets
per system node.
■ When selecting a target chunklet for relocation, the system attempts to identify a local
spare chunklet, a local free chunklet, a remote spare chunklet, and then finally a remote
free chunklet.
■ If the system uses up its free or spare chunklets for relocation, an alert is generated.
■ Once the spare and free chunklets are used up, automatic relocation no longer occurs. In
most cases, some data redundancy is lost. The system also generates an alert.
NOTE: Local chunklets are chunklets on disks whose primary path is connected to
a node that owns the logical disk containing the chunklets being relocated.