Fast_disk_takeover

Failed volume groups are taken over faster than in previous releases of HACMP™ due to the improved disk takeover mechanism.

HACMP automatically detects all volume groups and ensures that the faster option for volume group takeover is launched in the event of a node failure.

This functionality is especially useful for fallover of volume groups made up of a large number of disks.

Note: Fast disk takeover is not used in clusters with HACMP/XD for GLVM, if you use enhanced concurrent mode volume groups as geographically mirrored volume groups.

During fast disk takeover, HACMP skips the extra processing needed to break the disk reserves, or update and synchronize the LVM information by running lazy update. As a result, the disk takeover mechanism used for enhanced concurrent volume groups is faster than disk takeover used for standard volume groups.

In addition, enhanced concurrent volume groups are included as choices in picklists for shared resource groups in SMIT panels for adding/changing resource groups, and in C-SPOC SMIT panels.

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