genearl standby database issues

my databases are not in synch again.

in my oracle dr, trace file, i have the below entries repeating many times
Sat Feb 7 04:01:54 2004
RFS: Possible network disconnect with primary database
Sat Feb 7 04:01:58 2004
RFS: Possible network disconnect with primary database


and ocassionaly, some of the below entries
Sat Feb 7 04:05:04 2004
Fetching gap sequence for thread 1, gap sequence 182161-182223
Trying FAL server:
Error fetching gap sequence, no FAL server specified
Sat Feb 7 04:05:19 2004

therefore, i went to check the usertrace file and get the below explanation

"Encountered disk I/O error 19502"

and apparanetly, in my errpt, it shows the below
"67581038 0207040504 T H hdisk32 DISK OPERATION ERROR
F45CFAFB 0130133804 P H hdisk374 OPEN FAILURE "


so i guess the culprit is the disk issues.

the arch filesystem is not full in both databases.

what do u think?