Ontape error help.

Hi all, When I run "onstat -s -L 0" and got erro after 100% completed. It looks like chunk #28 error. Any ideas how to fixed? Thanks in advance. --Wayne OS: Sun Solaris 2.6 Informix 9.21 ################ error message #################### Please mount tape 1 on /dev/rst34 and press Return to continue ... 10 percent done. 20 percent done. 30 percent done. 40 percent done. 50 percent done. 60 percent done. 70 percent done. 80 percent done. 100 percent done. Archive failed - ISAM error: An error has occurred during archive back up. ############### Error outputed from AF files. 11:52:38 mt_aio_wait(32d87190) 11:52:38 chunkio(28, 0x38379400, 0xeff44, 512, 0x32f7ea28, 33, 1)errno 5 AIOREQ *a 38684bdc: 00000000 00000000 00000000 00000000 ........ ........ 38684bec: 00000000 00000000 32d87308 32d87018 ........ 2.s.2.p. 38684bfc: 00001329 41494f72 65710000 00000000 ...)AIOr eq...... 38684c0c: 07d10000 00000000 00000003 00000701 ........ ........ 38684c1c: 00000001 00000002 00000001 00000000 ........ ........ 38684c2c: 00000001 32d87204 00000000 00000001 ....2.r. ........ 38684c3c: 00000005 00000001 00000000 00000000 ........ ........ 38684c4c: 00000000 .... 11:52:38 11:52:38 Informix Dynamic Server 2000 Version 9.21.UC4 11:52:38 Assert Failed: ISAM error: An error has occurred duringarchive back up. 11:52:38 Who: Session(743, informix@iceberg, 237, 848558288) Thread(768, arcbackup1, 32914af8, 1) File: rsarcutl.c Line: 127 11:52:38 Action: arc_pages()/bfphysio() 11:52:38 Stack for thread: 768 arcbackup1 base: 0x3867c000 len: 36864 pc: 0x006d3bf8 tos: 0x386845b0 state: running vp: 1 0x006d2fbc (oninit)afhandler(0x6e81bf5, 0x1, 0x0, 0x3293f8d0, 0x1, 0x32914af8) 0x006d29d8 (oninit)afwarn_interface(0x32fbe960, 0x0, 0x33434c18, 0x9b805c, 0x7f, 0x0) 0x0056b810 (oninit)oops_error(0x32fbe960, 0x33434c18, 0xae, 0x1aeff44, 0x200, 0x 32d87190) 0x0057843c (oninit)arc_pages(0x1, 0x38378400, 0x0, 0x32fbe688, 0x38377c00, 0xffc 00) 0x00578168 (oninit)arc_dbspace(0x32fbe7d4, 0x38684f1c, 0x38684f18, 0x0, 0x382786 18, 0x3827736c) 0x00577334 (oninit)arc_scanner(0x3, 0x32fbe7d4, 0x3462cee0, 0x28, 0xa, 0x1) 0x006b3a08 (oninit)startup (0xa4e7e4, 0x1, 0x33a6ee80, 0x33a6ee80, 0x1, 0x1) 0x006ac4e0 (oninit)mt_wait (0x0, 0x0, 0x0, 0x0, 0x0, 0x0) 0x00000000 (*nosymtab*)0x0 11:52:38 See Also: /tmp/af.6e81bf5