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Hello Rusty
=20
It is a windows driver thing for the HBA card. It has to do with how =
many buffers can be chained together for a single I/O. You can look it =
up on the microsoft web site.=20
=20
But most of the HBA driver authors will allow you to change a config =
setting, most likely in a registry key, to up the buffer size.=20
=20
len
________________________________
From: veritas-bu-admin AT mailman.eng.auburn DOT edu =
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Major, =
Rusty
Sent: Tuesday, April 11, 2006 5:38 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] IBM LTO3 Buffer Sizes
I've setup a new environment with IBM LTO3 drives. I set =
SIZE_DATA_BUFFERS to 256K, but got an error in the details stating the =
drive only supported 64K and the job would not run. Sure enough, =
changing it back to 64K allowed the job to run as normal. Others have =
said that 256K is supported on LTO3, but I'm not sure what hardware or =
OS that is on. Is this an IBM drive thing, a Windows thing, or what? I =
would appreciate any ideas.
=20
Windows 2003 Master
NBU 6.0MP2
IBM LTO3
=20
Thanks,
=20
Rusty Major, MCSE, BCFP
Data Assurance Engineer
(281) 584-4693
VeriCenter, Inc.
=20
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<BODY>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>Hello Rusty</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>It is a windows driver thing for the HBA card. =
It has to do=20
with how many buffers can be chained together for a single I/O. You can =
look it=20
up on the microsoft web site. </FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>But most of the HBA driver authors will allow =
you to change=20
a config setting, most likely in a registry key, to up the buffer size.=20
</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN> </DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D993052223-11042006><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>len</FONT></SPAN></DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> =
veritas-bu-admin AT mailman.eng.auburn DOT edu=20
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] <B>On Behalf Of =
</B>Major,=20
Rusty<BR><B>Sent:</B> Tuesday, April 11, 2006 5:38 PM<BR><B>To:</B>=20
veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B> [Veritas-bu] IBM =
LTO3=20
Buffer Sizes<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial size=3D2>I've =
setup a new=20
environment with IBM LTO3 drives. I set SIZE_DATA_BUFFERS to 256K, but =
got an=20
error in the details stating the drive only supported 64K and the job =
would not=20
run. Sure enough, changing it back to 64K allowed the job to run as =
normal.=20
Others have said that 256K is supported on LTO3, but I'm not sure what =
hardware=20
or OS that is on. Is this an IBM drive thing, a Windows thing, or what? =
I would=20
appreciate any ideas.</FONT></SPAN></DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial =
size=3D2>Windows 2003=20
Master</FONT></SPAN></DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial size=3D2>NBU=20
6.0MP2</FONT></SPAN></DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial size=3D2>IBM=20
LTO3</FONT></SPAN></DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D314113121-11042006><FONT face=3DArial=20
size=3D2>Thanks,</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=3Dleft>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D194261715-04042005><FONT =
face=3DArial=20
size=3D2><STRONG>Rusty Major, MCSE, BCFP</STRONG></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D194261715-04042005><FONT =
face=3DArial=20
size=3D2><EM>Data Assurance Engineer</EM></FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D194261715-04042005><FONT =
face=3DArial=20
size=3D2>(281) 584-4693</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D194261715-04042005><STRONG><FONT=20
size=3D2><FONT face=3DArial><FONT color=3D#008000>Veri</FONT><FONT=20
color=3D#808080>Center, =
Inc.</FONT></FONT></FONT></STRONG></SPAN></DIV></DIV>
<DIV> </DIV></BODY></HTML>
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