I’m running a groupwise postoffice on a Netware 6.5 SP7 box and it reported
the following error on the server console

NSS-3.00-5002: Pool GWFS/GWFSPOOL is being deactivated. An error
(20012(beastTree.c[510)) at block 13000641 (file block -13000641) (ZID 1)
has compromised volume integrity.

The server then unmounts the pool. I ran nss /poolrebuild=GWFSPOOL to
rebuild the pool. The process took about 30 minutes and at the end it gave
a series of messages similar to the following

Rebuild warning: Zid 0x7C26C8 not process. Status 20444(beastTree.c[3403]).

My question is was running the rebuild the right thing to do in this
situation, and more to the point how do I know if it fixed anything? The
same server had this problem about a month ago, I ran the rebuild then and
it ran fine until today. The Pool is the only pool on a pair of mirrored
hard drives that are about 90% full.