I/O read () chunk # Problem

Hello Everyone, Can anyone tell me why I would have two chunks go down within a few hours of one another. I don't see any errno =3D codes. Here are a few pieces of the log. Problem? Solution? Also how often should the tbcheck be run? HPUX9.04 / Informix 5.0 Thx. Eve 10:01:21 Checkpoint Completed 10:01:44 I/O read() chunk 3, pagenum 955906, pagecnt 1 10:01:52 Process Aborted Abnormally: pid=3D12163 user=3D610 =us=3Dc0021d98 flags=3D1 10:03:17 I/O read() chunk 3, pagenum 903318, pagecnt 1 10:03:17 I/O read() chunk 3, pagenum 903318, pagecnt 1 <<<snip>>> 10:05:15 I/O read() chunk 3, pagenum 462611, pagecnt 1 10:05:17 I/O read() chunk 3, pagenum 462611, pagecnt 1 10:05:18 I/O read() chunk 3, pagenum 462611, pagecnt 1 10:06:41 Checkpoint Completed 10:08:48 Process Aborted Abnormally: pid=3D12409 user=3D743 =us=3Dc0020c40 flags=3D1 10:12:00 Checkpoint Completed 10:14:40 Process Aborted Abnormally: pid=3D12534 user=3D743 =us=3Dc001caec flags=3D1 10:16:34 I/O read() chunk 3, pagenum 874896, pagecnt 1 10:16:34 I/O read() chunk 3, pagenum 874896, pagecnt 1 10:17:21 Checkpoint Completed 10:29:04 Process Aborted Abnormally: pid=3D12699 user=3D0 us=3Dc001c240 = flags=3D1 10:30:15 Shutdown Mode 10:30:16 Checkpoint Completed 10:30:16 Quiescent Mode 10:30:21 INFORMIX-OnLine Stopped Tue Jul 1 10:33:54 1997 10:33:54 INFORMIX-OnLine Stopped Tue Jul 1 11:07:23 1997 11:07:23 INFORMIX-OnLine Initialized -- Shared Memory Initialized 11:07:23 Physical Recovery Started 11:07:23 Checkpoint Completed 11:07:23 Physical Recovery Complete: 0 Pages Restored 11:07:24 Checkpoint Completed 11:07:24 Logical Recovery Complete 0 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 11:07:25 Dropping temporary tblspace 100001a, recovering 8 pages. 11:07:25 Dropping temporary tblspace 100001c, recovering 8 pages. 11:07:25 Dropping temporary tblspace 1000037, recovering 8 pages. 11:07:25 Dropping temporary tblspace 1000039, recovering 8 pages. 11:07:39 Quiescent Mode 11:12:48 Checkpoint Completed 11:17:05 On-Line Mode 11:21:34 read_record: deleted rowid =3D 151525, partnum =3D 2000140 11:21:34 read_record: invalid rowid =3D 151525, partnum =3D 2000140 11:23:29 Checkpoint Completed 11:24:28 read_record: deleted rowid =3D 151521, partnum =3D 2000140 11:24:28 read_record: invalid rowid =3D 151521, partnum =3D 2000140 11:24:40 read_record: deleted rowid =3D 151521, partnum =3D 2000140 11:24:40 read_record: invalid rowid =3D 151521, partnum =3D 2000140 11:24:56 read_record: deleted rowid =3D 151521, partnum =3D 2000140 11:24:56 read_record: invalid rowid =3D 151521, partnum =3D 2000140 11:25:11 read_record: deleted rowid =3D 151521, partnum =3D 2000140 11:25:11 read_record: invalid rowid =3D 151521, partnum =3D 2000140 11:28:49 Checkpoint Completed 11:34:09 Checkpoint Completed 11:39:31 Checkpoint Completed 11:40:22 Logical Log 16383 Complete 11:43:14 read_record: deleted rowid =3D 151524, partnum =3D 2000140 11:43:14 read_record: invalid rowid =3D 151524, partnum =3D 2000140 11:43:33 read_record: deleted rowid =3D 151524, partnum =3D 2000140 11:43:33 read_record: invalid rowid =3D 15 11:43:33 read_record: invalid rowid =3D 151524, partnum =3D 2000140 11:44:56 read_record: deleted rowid =3D 151524, partnum =3D 2000140 11:44:56 read_record: invalid rowid =3D 151524, partnum =3D 2000140 11:44:59 Checkpoint Completed 11:50:11 Checkpoint Completed 11:52:16 Process Aborted Abnormally: pid=3D16917 user=3D604 =us=3Dcc4b95e8 flags=3D1 11:52:17 Process Completed Abnormally (rollback): tx=3Dcc4e2b00 flags=3D80403 11:55:42 Checkpoint Completed 12:01:07 Checkpoint Completed 12:06:36 Checkpoint Completed 12:12:20 Checkpoint Completed 12:13:07 Logical Log 16384 Complete <<<snip>>> 14:03:27 Logical Log 16388 Backed Up 14:06:52 Checkpoint Completed 14:12:10 Checkpoint Completed 14:17:27 Checkpoint Completed 14:22:09 Logical Log 16389 Complete 14:22:33 I/O read() chunk 8, pagenum 690364, pagecnt 1 14:22:34 I/O read() chunk 8, pagenum 797539, pagecnt 1 14:22:36 I/O read() chunk 8, pagenum 905256, pagecnt 1 14:22:37 I/O read() chunk 8, pagenum 896689, pagecnt 1 14:22:37 I/O read() chunk 8, pagenum 896689, pagecnt 1 <<<snip>>> 15:08:33 INFORMIX-OnLine Stopped Tue Jul 1 15:12:16 1997 15:12:16 INFORMIX-OnLine Initialized -- Shared Memory Initialized 15:12:16 Physical Recovery Started 15:12:17 Checkpoint Completed 15:12:17 Physical Recovery Complete: 0 Pages Restored 15:12:17 Checkpoint Completed 15:12:17 Logical Recovery Complete 3 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 15:12:18 Dropping temporary tblspace 1000009, recovering 8 pages. 15:12:18 Dropping temporary tblspace 100000a, recovering 8 pages. 15:12:20 Dropping temporary tblspace 10004c4, recovering 8 pages. 15:12:20 Dropping temporary tblspace 10004d1, recovering 8 pages. 15:12:20 Dropping temporary tblspace 10004e0, recovering 8 pages. 15:12:27 Dropping temporary tblspace 200039c, recovering 8 pages. 15:12:27 Dropping temporary tblspace 20003a4, recovering 8 pages. 15:12:27 Dropping temporary tblspace 20003b0, recovering 8 pages. 15:12:32 Quiescent Mode 15:14:20 On-Line Mode 15:17:37 Checkpoint Completed 15:33:37 Checkpoint Completed 15:39:00 Checkpoint Completed 15:42:41 allocslot(no room) - partnum 0x2000582 tr_pagenum 0x7dbc6 15:42:41 allocslot(no room) - maxslots 32 slotsize 58 15:42:41 c1177518: 00000000 00000000 00000001 00000000 ........ <<<snip>>>