HP SDLT 220/320GB only shows 149GB

[SADA_Support]

I am using Quantum SuperLoader SDLT320 and HP tapes 220/320GB (C7980A). BackupExec shows the capacity of the tapes at 149GB. It looks like it can put a maximum of 220GB on a tape (it then switches to a different tape). Hardware compression is enabled.
Any idea why the total capacity is shown incorrectly?

[SADA_Support]

Dear Veritas Tech Support,
Where is the answer? You left us no choice but to use this forum and you still don't provide the technical support you promised.

[A_van_der_Boom]

What drivers are you using, Veritas or manufacturers ?

Regards
A van der Boom

[SADA_Support]

Device Manager shows Veritas.

[A_van_der_Boom]

If you use the manufacturer drivers does BE then recognize the correct tape size ?

Regards
A van der Boom

[SADA_Support]

Looks like I found my answer.
This is from quantum site:
http://selfservice.talisma.com/display/2n/kb/article.asp?aid=1287
What is the storage capacity of my SDLT drive?
See Chart Below:

SDLT 220
Native Storage Capacity 110 GB
Compressed Storage Capacity 220 GB
(2:1 Compression)

SDLT 320
Native Storage Capacity 160 GB
Compressed Storage Capacity 320 GB
(2:1 Compression)

SDLT 600
Native Storage Capacity 300 GB
Compressed Storage Capacity 600 GB
(2:1 Compression)

The older HP tape case says 220-320GB*, which is misleading. You assume they mean 220 without compression and 320 - with, while it actually mean 220 and 320 with compression depending on what drive you use.
The question I now have is this: if I go into a tape properties (in the media set), and click on the ... buttong next to Media Type, I can choose DLT, but under Select Sub-type I don't have SDLT-I (160GB). The largest size I have is 110GB.
Can anyone confirm if v10 or 9.1 with the latest SP have SDLT-1 (160GB)?
Thanks.

[Asma_Tamboli]

Hi,

You could also refer to the following document:

http://support.veritas.com/docs/199542

also check out the following document:

http://support.veritas.com/docs/246958

NOTE : If we do not receive your reply within two business days, this post would be marked assumed answered and would be moved to answered questions pool.