Veritas-bu

[Veritas-bu] SIZE_DATA_BUFFERS number for HP LTO3 drives [NC]

2007-03-27 15:39:17
Subject: [Veritas-bu] SIZE_DATA_BUFFERS number for HP LTO3 drives [NC]
From: misha.pavlov at sgcib.com (misha.pavlov AT sgcib DOT com)
Date: Tue, 27 Mar 2007 15:39:17 -0400
Chris, many thanks ! 

The .pdf from HP is *exactly* what I was looking for.


--
Misha Pavlov
This message uses only 100% recycled electrons.




Chris Freemantle <chris at fil.ion.ucl.ac.uk> 
03/26/2007 04:44 AM


To
Misha PAVLOV/us/socgen at socgen
cc
veritas-bu at mailman.eng.auburn.edu
Subject
Re: [Veritas-bu] SIZE_DATA_BUFFERS number for HP LTO3 drives [C1]






Misha,

Try 256 kB

if you search on "LTO-3 SIZE_DATA_BUFFERS"  and "netbackup tuning guide" 
you will find a number of very useful documents. As a starter, have a look 
at -

h71028.www7. hp .com/ERC/downloads/5982-9971EN.pdf

http://seer.entsupport.symantec.com/docs/244652.htm

You should be aware that Windows server 200 SP1 limits the 
SIZE_DATA__BUFFERS to 64kB, see

http://support.microsoft.com/kb/907418/

this seems to be fixed in SP2 (thanks to Ric Davis for that info)



http://seer.support.veritas.com/docs/183702.htm

Sugest "NOTE: For Digital Linear Tape (DLT) drives, the number that seems
to give the best performance for SIZE_DATA_BUFFERS is 65536 "
I wonder if anyone has SIZE_DATA_BUFFERS number for HP LTO3 drives ?


--
Misha Pavlov
This message uses only 100% recycled electrons.

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-- 

---

REMEMBER- There is only one certainty about storage systems - they *will* 
fail !
This includes backup and archiving systems.
If you want to be paranoid, make your own backups as well.

For FIL computer support issues, please email

  support at fil.ion.ucl.ac.uk

rather than individual team members

Chris Freemantle
Data Manager
Wellcome Trust Centre for Neuroimaging

Tel. +44 (0)20 7833 7472 reception
Tel. +44 (0)20 7833 7496 direct
Fax  +44 (0)20 7813 1420

Home Page:  http://www.fil.ion.ucl.ac.uk

*************************************************************************
This message and any attachments (the "message") are confidential and
intended solely for the addressees.
Any unauthorised use or dissemination is prohibited. 
E-mails are susceptible to alteration.   
Neither SOCIETE GENERALE nor any of its subsidiaries or affiliates 
shall be liable for the message if altered, changed or falsified. 

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