I am running IDS 7.3 and my backup (level 0) is terminating after 100%

Onstat -d output. (Part of )
Dbspaces

address number flags fchunk nchunks flags owner name

8004e158 1 1 1 1 N informix rootdbs

80d73f58 2 1001 2 32 N informix datadbs

80daaef8 3 1 6 24 N informix
dbspace1

80daafb8 4 1 9 18 N informix
datadbs2

80dab078 5 1 12 1 N informix logdbs

80dab138 6 2001 13 2 N T informix tempdbs

80dab1f8 7 1 58 23 N informix
dbspace3

80dab2b8 8 1 59 23 N informix
dbspace4





80da3518 60 7 0 1000000 0 PO- /dev/
okdatadbs51

80da35f8 61 7 0 1000000 133331 PO- /dev/
okdatadbs52

80da36d8 62 7 0 1000000 0 PO- /dev/
okdatadbs53


ERROR

20:15:21 mt_aio_wait(805e6c98)

20:15:21 chunkio(61, 0xe7247400, 0x3482d, 3072, 0x80da3438, 33, 1)
errno 5

AIOREQ *a

8e1485cc: 00000000 00000000 00000001 00000000 ........ ........

8e1485dc: 00000000 00000000 00000000 00000000 ........ ........

8e1485ec: 00000000 805e6e10 805e6b20 00058357 .....^n. .^k ...W

8e1485fc: 41494f72 65710000 00000000 07d10000 AIOreq.. ........

8e14860c: 00000000 00000003 00000801 00000001 ........ ........

8e14861c: 00000002 00000001 00000000 00000001 ........ ........

8e14862c: 805e6d18 00000000 00000001 00000005 .^m..... ........

8e14863c: 00000001 00000000 00000000 00000000 ........ ........

20:15:21

20:15:21 Informix Dynamic Server Version 7.31.UC5 Software Serial
Number AAC

#J876311



20:15:21 Assert Failed: ISAM error: An error has occurred during
archive back

up.





20:15:21 Who: Session(16345, informix@rp4440, 3823, -2132963368)

Thread(16808, arcbackup1, 80db6288, 4)

File: rsarcutl.c Line: 126

20:15:21 Action: arc_pages()/bfphysio()



---------------------------------

Begin System Alarm Program Output

---------------------------------



Assertion Failure Type: Warning

Host Name: rp4440

Database Server Name: ok_srvr

Time of failure: Mon Oct 29 20:15:21 CAT 2007

AF file: /tmp/af.45902338

Shared memory file: None

System Blocking: OFF