database corruption

Hi,

We recently switch over from Solaris to Linux and we've been
experiencing a couple database corruptions problems. We're using the
2.6 kernel and a XFS file system, in case there are any known problems
with this setup.

It's my understanding that these errors are typically b/c of hardware
problems, so we're in the process of checking the disk. However, are
there other things that I should look to find out what's going on? The
table that was corrupted earlier this week was dropped and recreated,
but it was corrupted again sometime last night. The table is pretty
active, about 10GB are inserted and deleted every day.

-Michael

here's what vacuum comes up with

INFO: vacuuming "public.tbltimeseries"
WARNING: relation "tbltimeseries" TID 696892/1: OID is invalid
WARNING: relation "tbltimeseries" TID 696892/2: OID is invalid
WARNING: relation "tbltimeseries" TID 696892/3: OID is invalid
WARNING: relation "tbltimeseries" TID 696892/4: OID is invalid
WARNING: relation "tbltimeseries" TID 696892/5: OID is invalid
WARNING: relation "tbltimeseries" TID 696892/6: OID is invalid
WARNING: relation "tbltimeseries" TID 696893/1: OID is invalid
WARNING: relation "tbltimeseries" TID 696893/2: OID is invalid
WARNING: relation "tbltimeseries" TID 696893/3: OID is invalid
WARNING: relation "tbltimeseries" TID 696893/4: OID is invalid
WARNING: relation "tbltimeseries" TID 696893/5: OID is invalid
WARNING: relation "tbltimeseries" TID 696893/6: OID is invalid
WARNING: relation "tbltimeseries" TID 696894/1: OID is invalid
WARNING: relation "tbltimeseries" TID 696894/2: OID is invalid
WARNING: relation "tbltimeseries" TID 696894/3: OID is invalid
WARNING: relation "tbltimeseries" TID 696894/4: OID is invalid
WARNING: relation "tbltimeseries" TID 696895/1: OID is invalid
WARNING: relation "tbltimeseries" TID 696895/2: OID is invalid
WARNING: relation "tbltimeseries" TID 696895/3: OID is invalid
WARNING: relation "tbltimeseries" TID 696895/4: OID is invalid
WARNING: relation "tbltimeseries" TID 696895/5: OID is invalid
WARNING: relation "tbltimeseries" TID 696895/6: OID is invalid
WARNING: relation "tbltimeseries" TID 1124824/1: OID is invalid
WARNING: relation "tbltimeseries" TID 1124824/2: OID is invalid
WARNING: relation "tbltimeseries" TID 1124824/3: OID is invalid
WARNING: relation "tbltimeseries" TID 1124824/4: OID is invalid
WARNING: relation "tbltimeseries" TID 1124824/5: OID is invalid
INFO: index "idx_timeseries2" now contains 27066056 row versions in
108521 pages
DETAIL: 0 index pages have been deleted, 0 are currently reusable.
CPU 3.30s/1.06u sec elapsed 17.28 sec.
INFO: "tbltimeseries": found 0 removable, 27065818 nonremovable row
versions in 1643991 pages
DETAIL: 0 dead row versions cannot be removed yet.
There were 86 unused item pointers.
0 pages are entirely empty.
CPU 25.41s/4.88u sec elapsed 272.64 sec.
INFO: vacuuming "pg_toast.pg_toast_1436963967"
ERROR: invalid page header in block 1890530 of relation
"pg_toast_1436963967"