help! "Checkpoint blocked by down space"

bbq

小弟对informix不熟，今天ontape -U dbname时，数据库就挂住了，online.log发生了以下错;
  18:34:12  Assert Failed: Chunk 42 is being taken OFFLINE.
18:34:12  Informix Dynamic Server Version 9.30.FC3
18:34:12   Who: Thread(16, flush_sub(0), c00000005853e850, 3)
                File: rsmirror.c Line: 1847
18:34:12   Results: Dynamic Server will block at next checkpoint
18:34:12   Action: Shutdown (onmode -k) or override (onmode -O)
18:34:12  stack trace for pid 17260 written to /tmp/af.3f860fc
18:34:12   See Also: /tmp/af.3f860fc
18:34:12  Chunk 42 is being taken OFFLINE.
18:34:13  I/O write chunk 42, pagenum 363646, pagecnt 1 -->; errno = 2
18:34:13  Checkpoint blocked by down space, waiting for override or shutdown


我现在怎么办呢?