3PAR InForm® OS 2.2.4 Concepts Guide (320-200085 Rev B, March 2009)

A.2
Viewing Spare Chunklets
3PAR InForm OS Concepts Guide InForm OS Version 2.2.4
■ If the time limit for logging is reached, or if the logging logical disk becomes full, relocation
of chunklets on the physical disk to other chunklets (free chunklets or allocated spares)
starts automatically. Free chunklets are chunklets that are not used by the system. Spare
chunklets are physically allocated using the
createspare command.
■ 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.
A.2 Viewing Spare Chunklets
Use the showspare command to display information about all spare chunklets. If a spare
chunklet is in use, the
showspare output includes the name and ID of the logical disk using it,
as well as the chunklet’s position on the logical disk. If the spare chunklet is not in use, it is
listed as
available, and the columns relating to the logical disk show only dashes.
The following example displays information about two spare chunklets, 0 and 1, on physical
disk 23:
NOTE: Local chunklets are chunklets on disks, which are used by the node that
owns the logical disk for the chunklet being relocated.
%cli showspare
PdId Chnk LdName LdCh State Usage Media Sp Cl From To
23 0 ---- --- normal available valid Y Y --- ---
23 1 sales1.0 2 normal ld valid Y Y --- ---