Hi Justin,

as far as i understand you enabled the compression in the policy right ?
If yes, the benefit of the drive internal compression is around 0 cause you 
still write a compressed tar file on tape.

That means that the visible size of "bpmedialist -m <TAPE>" is already the 
compressed size.

Cheers
Max

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu 
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Justin 
Piszcz
Sent: Friday, November 21, 2008 10:20 AM
To: ramaswamy savi
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Reg: LTO3



On Thu, 20 Nov 2008, ramaswamy savi wrote:

>   Hi ALL,
>  
>             We have 2 LTO3 standlone Tape drive connected via SCSI cable in 
> Sunfire-V890 server and same configured via Netbackup 6.0 MP5. From previous 
> week onwards, LTO3 tape drive are capable of writing only 400GB, it's not 
> exceeding more than 400GB. Compression enabled in policy also. Pls provide 
> solution ASAP. We tested the same in New tape ( HP Ultrium LTO3)  also, but 
> still its writing only 400 GB and throwing an error requesting any new media
>
> Eailer 700 GB were able to write the data in HP LTO3 drive
>
> No changes made in configuration file also, so pls provide solution ASAP.
>  
>  Tape drive : LTO3 Sun MicroSystem
>  Tape Model : HP Ultrium LTO3/ 800GB rw
>
> Regards,
> Hemalatha.

1. What data are you backing up?
    a. Compressed data will not compress any further.
    b. LTO-3 tape is 400GiB, not 800GiB.
    c. LTO-4 tape is 800GiB.
2. Are your tape drives defined as 'hcart3'?
    a. /usr/openv/volmgr/bin/tpconfig -d
    b. Run the command above to find out.

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