HP Ultrium 448c with HP SAS Controller LSI Logic SAS3442E issue

[Kumdist]

I have a HP Ultrium 448c SAS Tape Blade partnered with a BL460c G1 in a c7000. The tape drive is connected to a HP SAS Controller LSI Logic SAS3442E-HP 416155-001
I am using Symantec Backup Exec 12.5 and my backups have been terrible.
Way through the backup the tape goes offline.The cleaning led goes amber and I end up cleaning the drive every 5 mins. On the event viwer, the common error is
Event Type: Error
Event Source: Lsi_sas
Event Category: None
Event ID: 11
Date: 7/30/2008
Time: 11:52:40 PM
User: N/A
Computer: tw
Description:
The driver detected a controller error on \Device\RaidPort1

My problems are simillar to ones experience by the users in this thread: http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1246870

I was wondering if someone found a solution.
I am running Windows 2003Std Ed SP2.

I just upgraded the firmware for both the tape drive and the controller.
Tape Drive FW=T65D
Controller FW=1.23.43.00-IR

Dont know if these are the latest.
Any help would be much appreciated.

[Marino Meloni_1]

when the cleaning led light on, the error come from the drive
or you have damaged cartridges, or the head of the LTO is damaged
Run a couple of cleaning cycle, then load a brand new tape and run the backup, if it fails, run LTT read write test, and or media validation, then collect a support ticket and attach it here

[Kumdist]

I replaced the tape drive and all errors are gone.backups are successfull.
I think I'll close this for now.