51SP1RP2P2HF2 hotfix

From about version 5.0 onward, hotfixes on Storage Foundation generally refer to private fixes which are only available through support.

Couple of ways to check --

First, search on SORT for the etrack number:

https://sort.symantec.com/search?q=2600939

There are no results, which strongly suggests that the patch has not yet been included in a publically released patch.

Using a navigation approach through SORT's patchfinder:

https://sort.symantec.com/patch/finder

and then setting product=SF, version=5.1SP1

We see 5.1SP1RP2 which is a vxvm patch:

https://sort.symantec.com/patch/detail/5612

and looking through the "OSRI" section there are no newer patches for that branch listed at the time of writing this.