[Veritas-bu] External event caused rewind during write

Dears,

Someone can help me solve this problem. My site is very critical, because 
this customer is migrating from EDM (EMC²/Legato) to Veritas Netbackup, and 
tomorrow is the deadline for the shutdown of the EDM solution and technical 
support.

Related Problem:
Tape rewind during write backup in media server WINDOWS. The problem occours 
in any client servers the diferents S.O.
File ENABLE_SCSI_RESERVE has been active in all media servers.
Not possible disable option "speed write" in bridge or tapes drives, because 
STK equipment not use this option.
Is SIZE_DATA_BUFFERS greater than 64k supported on Windows? Our 
SIZE_DATA_BUFFERS is currently set to 256k on all our media servers. Do you 
think it can be generating this error? Also, the IBM driver allows variable 
block length. Should we use VERITAS drivers?

Buffer configuration to all media servers:
NET_BUFFER_SZ = 65536
SIZE_DATA_BUFFERS = 262144
NUMBER_DATA_BUFFERS = 8
MPX_RESTORE_DELAY = 360

SITE IS COMPOSE FOR:
Drives: 10 x IBM LTO-2 - firmware 38D0
Robots: 2 x STK L80 (5 tape LTO2 each)
SSO: Not being used
Interconnect: Fibre Channel and SCSI with Bridges (STK SN3300 - frw 5.3.12)
HBA: Emulex LP9002L - firmware 3.92A2
Master Server Netbackup DC 4.5 FP7 - Solaris 8
Media Server Netbackup DC 4.5 FP7 - Windows 2000
Media Server Netbackup DC 4.5 FP7 - Windows 2003 exist others media servers 
UNIX (AIX, HP-UX and Solaris)

LOG BPTM:
23:50:13.778 [792.3376] <2> write_data: write of 262144 bytes indicated only 
262144 bytes were written, err = 1100
23:50:13.778 [792.3376] <2> write_backup: write_data() returned, exit_status 
= 0, CINDEX = 2, TWIN_INDEX = 0, backup_status = -3
23:50:13.778 [792.3376] <2> send_brm_msg: MEDIA NOT READY
23:50:15.731 [792.3376] <2> io_close: closing C:\Program Files\VERITAS 
\NetBackup\db  \media\tpreq/AAA027, from .\bptm.c.15768
23:50:15.731 [792.3376] <2> write_backup: block position check: actual 
1897457, expected 1897458
23:50:15.731 [792.3376] <2> getsockconnected: host=veri0007 service=bpjobd 
address=172.16.100.7 protocol=tcp non-reserved port=13723
23:50:15.731 [792.3376] <2> logconnections: BPJOBD CONNECT FROM 
172.16.100.13.2824 TO 172.16.100.7.13723
23:50:15.731 [792.3376] <2> job_connect: Connected to the host veri0007 
contype 10 jobid <5135> socket <632>
23:50:15.731 [792.3376] <2> job_connect: Connected on port 2824
23:50:15.731 [792.3376] <2> set_job_details: Done
23:50:15.731 [792.3376] <2> job_monitoring: Timeout cut off was tv_sec = 
1096253422, tv_usec = 731000
23:50:15.965 [792.3376] <2> job_monitoring: ACK disconnect  23:50:15.965 
[792.3376] <2> job_disconnect: Disconnected
23:50:15.965 [792.3376] <2> getsockconnected: host=veri0007 service=bpdbm 
address=172.16.100.7 protocol=tcp non-reserved port=13721
23:50:15.965 [792.3376] <2> logconnections: BPDBM CONNECT FROM 
172.16.100.13.2825 TO 172.16.100.7.13721
23:50:16.403 [792.3376] <16> write_backup: FREEZING media id AAA027, 
External event caused rewind during write, all data on media is lost

Tanks
[Veritas-bu] External event caused rewind during write - Media Servers Windows
