Our shop is running  Oracle7.3.4, EBU 2.2.0.7.0, ADSM API 3.1.20.0 &
A.O.B 2.1.7.0. We use AOB to hot backup a several Oracle instances. AOB
works fine on all Oracle instances, except it always failed on one of our
16GB Oracle Instances; It always failed at the same point, when it tried
to backup a datafile called fis_data.db3. At first I thought that
particular datafiles is corrupted, but fsck showed the file is okay.
Then I tried to backup that particular datafiles with EBU, it was okay
too. When I checked the dsmerror.log on the client, it only has the
timestamps without message.

Here is my EBU hot backup log:

                                   :
                                   :
                                   :
                                   :
                                   :

                 Starting BFS "250945324398" on 15-DEC-99 23:23
                 (800.004 MB)
                 "/home2/userdata/PROD/fis_data.dbf3" for 800.004MB

briralloc- 8706: Blocksize: 4096, chunkblksz: 32, chunksize: 32, nfiles:
1
briralloc- 8706: DISK_IO_SIZE: 16, TAPE_IO_SIZE: 32, nbiof: 1, nthreads:
4
briralloc- 8706: niobuf: 4, nchunk: 0, ntask: 0, nzbuf: 0
brsstopn- 8706: Opening for 2, BFS=250945324398, bsz = 131072

 brsstopn- 8706: sbtopen failed for 250945324398 with code 4294967295,
sbterror=7009
brnloserr- 8706: O/S ERROR occurred in function=britopen, oserr=0,
oerc=7009
brnloserr- 8706: Possible additional arguments:
brnloserr- 8706: Arg1 = 0x0
brnloserr- 8706: Arg2 = 0x2ff21dc4
brnloserr- 8706: Arg3 = 0x0
brnloserr- 8706: Arg4 = 0x20002
brnloserr- 8706: Arg5 = 0xd
brnloserr- 8706: Arg6 = 0xffffffff
brnloserr- 8706: Arg7 = 0x28
brnloserr- 8706: Arg8 = 0xffffffff
brnloserr- 8706: Arg9 = 0x20000
brnloserr- 8706: Arg10 = 0x20086518
>>> EBU-7009: Sbtopen: Cannot connect to media manager
    on 12/15/1999 23:23:59 [ 8706 : britopen ]

>>> EBU-4304: Can not open Backup File Set "250945324398" in mode 2 with
    buffer size 131072 on 12/15/1999 23:23:59 [ 8706 : britopen ]
                    BFS in progress "250945324398" cancelled on
                    15-DEC-99 23:23

                    Issuing Statement: ALTER TABLESPACE "FIS_DATA" END
                    BACKUP;

                    Statement processed.

                    Ending backup to tape

                    This backup spawns archive sequence numbers 21306 to
                    21306

                    This backup comprises SCN 97213913 to 97213933

                    Database Backup job 35 PARTIALLY SUCCESSFUL on
                    15-DEC-99 23:24


Any clues?

Kin Lee