> I am trying to configure IBM LTO2 drives to work with Solaris 5.9 and Emulex 
> LP9802 HBAs. 
>  
> My backup software keeps marking tapes full prematurely, with as little as a 
> few MB written to the tape. All of my research and support cases point to a 
> misconfigured st.conf entry for LTO2.

What makes you say that?  The st.conf does control some things, but
premature tape full indicationss or spurious errors are not something I
would expect.

Can you get the exact SCSI message that is returned to the application?
Is there anything in /var/adm/messages when it happens?

> Does anyone know how this should be configured?

First of all, with up-to-date patches, you shouldn't need to add any
configuration.  The LTO2 type is already in the driver.  You can confirm
that with 'strings'.

$ strings /kernel/drv/sparcv9/st | grep LTO
HP Ultrium LTO 2
HP Ultrium LTO
Seagate Ultrium LTO
IBM Ultrium Gen 2 LTO
IBM Ultrium Gen 2 LTO
IBM Ultrium LTO
IBM Ultrium LTO

If you don't have them, patch up.

> And just as importantly, can anyone explain what each field in the
> initiation strings stand for? Understanding what is going on will help
> me almost as much as knowing what specific entry I need.

It's specified in the 'st' man page.  There's quite a bit of detail, so
I won't go into it here, but feel free to ask again if you have some
specific questions about it.  Most of it is a bit string for various
options, then some vendor specific "density" settings.

-- 
Darren Dunham                                           [EMAIL PROTECTED]
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
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