[Networker] NDMP Large Saveset

Hi to all, this is my backup environment
Legato Networker 7.3.2 on Windows 2000 SP4
Netapp FAS3020 Data ONTAPTM 7.2.6.
Two tapes which are attached to the filer trought Fibre Channel.
Im trying to do a full backup of 2TB volume throught NDMP, but I always come up 
against the same problem. I don't have any problems when making backup with 
small volumes.

Savegroup timeout is set to 0.
Output off daemon.log

* nas2:/vol/FICHEROS/usuarios nsrndmp_save: Tape server paused: reached the end 
of medium
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: Opened the tape device : /dev/nrst0a
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: Continuing backup to the next volume
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: NDMP Service Log: DUMP: Thu Jul  8 
01:03:02 2010 : We have written 653772198 KB.
* nas2:/vol/FICHEROS/usuarios 
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: NDMP Service Log: DUMP: Thu Jul  8 
01:08:02 2010 : We have written 663931346 KB.
* nas2:/vol/FICHEROS/usuarios 
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: NDMP Service Log: DUMP: Tape write 
failed.
* nas2:/vol/FICHEROS/usuarios 
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: NDMP Service Log: DUMP: DUMP IS 
ABORTED
* nas2:/vol/FICHEROS/usuarios 
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: NDMP Service Log: DUMP: Deleting 
"/vol/FICHEROS/../snapshot_for_backup.515" snapshot.
* nas2:/vol/FICHEROS/usuarios 
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: Data server halted: Failed to 
connect to the mover.
* nas2:/vol/FICHEROS/usuarios nsrndmp_save: NDMP Service Log: Connection or IO 
Error.

I have increased the value of Load Sleep, Unload Sleep and Eject Sleep to 300 , 
 but I always come up against the same problem.

In the filer, i set ndmdp debug 50, but allways appears NDMP_NO_ERR.
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: Error NDMP_NO_ERR
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: Method 1539
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: ReplySequence 0
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: Error NDMP_NO_ERR
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: Log type: 0
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: Message id: 0
Jul 08 01:11:58 GMT+02:00 [ndmpd:97]: Log message: DUMP: Tape write failed.

Could someone help me, I'm going crazy with this issue.

Thanks

+----------------------------------------------------------------------
|This was sent by joseramonlopez AT gmail DOT com via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER