Informix OnLine 5.01 CRASHED - ANY IDEAS

This morning our Informix Online version 5.01 crashed with the following errors indicating wrong permissions on the disk volumes. The permissions were fine informix informix. The engine was brought back online then crashed again while running a tbcheck -pe. Following is the online log can anyone shed any light. The hardware did not crash. Thank Jason 08:35:28 Cannot Open Primary Chunk '/dev/vx/rdsk/rootdbs', errno = 13 08:35:28 Cannot Open Mirror Chunk '/dev/vx/rdsk/rootdbsm', errno = 13 08:35:28 I/O write() chunk 1, pagenum 148123, pagecnt 1 08:35:28 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:35:28 -- Online Aborting -- us=10002078, pid=4564, uid=102 08:35:28 INFORMIX-OnLine entering ABORT mode!!! 08:35:28 -- Online Aborting -- us=10001a1c, pid=2371, uid=100 08:35:32 INFORMIX-OnLine Stopped Fri Oct 3 08:49:21 1997 08:49:21 Physical Recovery Started 08:49:22 Checkpoint Completed 08:49:22 Physical Recovery Complete: 0 Pages Restored 08:49:22 Checkpoint Completed 08:49:22 Logical Recovery Complete 60 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 08:49:27 Dropping temporary tblspace 2000225, recovering 8 pages. 08:49:27 Dropping temporary tblspace 2000227, recovering 15472 pages. 08:49:28 Quiescent Mode 08:49:31 On-Line Mode 08:49:49 Cannot Open Primary Chunk '/dev/vx/rdsk/rootdbs', errno = 13 08:49:49 Cannot Open Mirror Chunk '/dev/vx/rdsk/rootdbsm', errno = 13 08:50:24 Process Aborted Abnormally: pid=5392 user=102 us=10001fe4 flags=1 08:54:40 I/O write() chunk 1, pagenum 70662, pagecnt 4 --> errno = 4 08:54:40 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 INFORMIX-OnLine Must ABORT Physical log flush write error us 0x10001a1c pid 5375 us_flags 0x201 plog 0x100014f4 pl_phybegin 0x101f8c pl_physize 102400 pl_phypos 0xf47a 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 I/O write() chunk 1, pagenum 70662, pagecnt 4 --> errno = 4 08:54:40 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 INFORMIX-OnLine Must ABORT Physical log flush write error us 0x10001a1c pid 5375 us_flags 0x201 plog 0x100014f4 pl_phybegin 0x101f8c pl_physize 102400 pl_phypos 0xf47a 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 I/O write() chunk 1, pagenum 148124, pagecnt 1 --> errno = 4 08:54:40 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 error on log write, buf 153e0000, physaddr 1196700, npages1 08:54:40 INFORMIX-OnLine Must ABORT Log Error 'logput() - logwrite() FAILED' us 0x10001a1c pid 5375 us_flags 0x201 tx 0x1001e89c tx_flags 0x80001 tx_loguniq 142 tx_logpos 0x1b100f4 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 I/O write() chunk 1, pagenum 7, pagecnt 1 --> errno = 4 08:54:40 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 Checkpoint Page Write Error 08:54:40 I/O write() chunk 1, pagenum 9, pagecnt 1 --> errno = 4 08:54:40 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 Checkpoint Page Write Error 08:54:40 I/O write() chunk 1, pagenum 2, pagecnt 1 --> errno = 4 08:54:40 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 08:54:40 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:40 Checkpoint Page Write Error 08:54:41 INFORMIX-OnLine entering ABORT mode!!! 08:54:41 -- Online Aborting -- us=10001a1c, pid=5375, uid=100 08:54:44 INFORMIX-OnLine Stopped Fri Oct 3 08:58:39 1997 08:58:39 INFORMIX-OnLine Initialized -- Shared Memory Initialized 08:58:39 Physical Recovery Started 08:58:39 Checkpoint Completed 08:58:39 Physical Recovery Complete: 0 Pages Restored 08:58:39 Logical Recovery Complete 0 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 08:58:45 Quiescent Mode 08:58:49 On-Line Mode 09:03:23 Cannot Open Primary Chunk '/dev/vx/rdsk/rootdbs', errno = 13 09:03:23 Cannot Open Mirror Chunk '/dev/vx/rdsk/rootdbsm', errno = 13 09:03:23 I/O write() chunk 1, pagenum 71030, pagecnt 16 09:03:23 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 09:03:23 -- Online Aborting -- us=10002078, pid=5523, uid=102 09:03:23 INFORMIX-OnLine entering ABORT mode!!! 09:03:23 -- Online Aborting -- us=10001a1c, pid=5482, uid=100 09:03:27 INFORMIX-OnLine Stopped Fri Oct 3 09:24:57 1997 09:24:57 INFORMIX-OnLine Initialized -- Shared Memory Initialized 09:24:57 Physical Recovery Started 09:24:58 Checkpoint Completed 09:24:58 Physical Recovery Complete: 368 Pages Restored 09:24:58 Checkpoint Completed 09:24:58 Logical Recovery Complete 2 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 09:25:03 Dropping temporary tblspace 200021b, recovering 8 pages. 09:25:03 Dropping temporary tblspace 2000225, recovering 8 pages. 09:25:04 Quiescent Mode 09:25:05 On-Line Mode 09:30:25 Checkpoint Completed 09:41:04 Checkpoint Completed 10:08:02 Cannot Open Primary Chunk '/dev/vx/rdsk/rootdbs', errno = 13 10:08:02 Cannot Open Mirror Chunk '/dev/vx/rdsk/rootdbsm', errno = 13 10:08:15 Process Aborted Abnormally: pid=5845 user=102 us=10001fe4 flags=1 10:11:38 Shutdown Mode 10:11:39 I/O write() chunk 1, pagenum 148140, pagecnt 1 --> errno = 4 10:11:39 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 10:11:39 -- Online Aborting -- us=10001a1c, pid=5650, uid=100 10:11:39 error on log write, buf 153e8000, physaddr 1196716, npages1 10:11:39 INFORMIX-OnLine Must ABORT Log Error 'logput() - logwrite() FAILED' us 0x10001a1c pid 5650 us_flags 0x201 tx 0x1001e89c tx_flags 0x80001 tx_loguniq 142 tx_logpos 0x1b20018 10:11:39 -- Online Aborting -- us=10001a1c, pid=5650, uid=100 10:11:39 I/O write() chunk 1, pagenum 6, pagecnt 1 --> errno = 4 10:11:39 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 10:11:39 -- Online Aborting -- us=10001a1c, pid=5650, uid=100 10:11:39 Checkpoint Page Write Error 10:11:39 I/O write() chunk 1, pagenum 8, pagecnt 1 --> errno = 4 10:11:39 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 10:11:39 -- Online Aborting -- us=10001a1c, pid=5650, uid=100 10:11:39 Checkpoint Page Write Error 10:11:39 I/O write() chunk 1, pagenum 3, pagecnt 1 --> errno = 4 10:11:39 INFORMIX-OnLine Must ABORT Root chunk and root mirror down. 10:11:39 -- Online Aborting -- us=10001a1c, pid=5650, uid=100 10:11:39 Checkpoint Page Write Error 10:11:39 INFORMIX-OnLine entering ABORT mode!!! 10:11:39 -- Online Aborting -- us=10001a1c, pid=5650, uid=100 10:11:41 INFORMIX-OnLine Stopped Fri Oct 3 10:11:54 1997 10:11:54 INFORMIX-OnLine Initialized -- Shared Memory Initialized 10:11:54 Physical Recovery Started 10:11:54 Checkpoint Completed 10:11:54 Physical Recovery Complete: 0 Pages Restored 10:11:54 Logical Recover