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I never used LTO3, but I have done the same last week on a Windows 2003
server running NBU 6.0 MP1 but using STK9940B
I had the same problem as you have seen. I tried out different tapedrivers
and ended up downloading the newest drivers from Veritas and that one
worked. Since my implementation have have restored several times including
some SQL databases without any problem.
I have also now upgraded NBU to 6.0 MP2 and it still work without any
problem.
I use Emulex LP10000DCex HBA's in that mediaserver
/johnny
_____
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Scott
Jacobson
Sent: 5. april 2006 22:18
To: veritas-bu AT mailman.eng.auburn DOT edu; Sekhon S.
Subject: Re: [Veritas-bu] LTO3 maximum block size of 65536 bytes; abuffer
size of 262144 cannot be used
Simrat,
I've seen many discussions in this forum about using 262144 for a buffer
sizes on Windows, and most of those discussions talk about it not being
recommend or successful based on Windows TCP/IP Stack size limitation.
Others have indicated they have been able to get buffers sizes like this to
work if your able "tweek" SCSI card parameters or registry settings as
you've mentioned.
Based on your error message, I'd say the registry may have changed, but
again, your fighting a fixed block size between the device and OS IP Stack
communications that changes it back to 64K.
I've also read here that there is a unsupported Windows OS parameter change
that can be made as well, but again, I don't recall from anyone in this
forum indicating they've been able to make it work successfully.
I abandoned my effort two years ago to get this to work and now use Linux
Media and Master servers to resolve this issue.
Scott
>>> "Sekhon Simrat S." <SSSekhon AT VASC DOT com> 4/5/2006 11:20 am >>>
Hello,
We are using Netbackup 6.0 MP1 on Win2k3 STD with HP MSL 6030 tape library
housing two Ultrium 3 LTO 960 drives. Any idea on how can we change the
block size from 64Kb to 256 Kb on the tape drive? We've change the buffer
size in Netbackup and it seems to be writing at 256kb but throws an error
"The tape device at index -1 has a maximum block size of 65536 bytes; a
buffer size of 262144 cannot be used"
HP support pointed this to the SCSI adapter. I'm using LSI PCI-X Ultra 320
SCSI adapter with the latest driver. According to LSI, there is a registry
change that needs to be done to overcome the Windows limitation of 64kb
buffer size. This was changed to 256kb as per LSI requirements and I'm
still getting the above error. It seems like the drive just can't write more
than 64k. Any ideas how can this be changed to 256?
Thanks in advance.
Simrat
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<body lang=3DEN-US link=3Dblue vlink=3Dpurple =
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<div class=3DSection1>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I never used LTO3, but I have done =
the
same last week on a Windows 2003 server running NBU 6.0 MP1 but using =
STK9940B<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I had the same problem as you have =
seen. I
tried out different tapedrivers and ended up downloading the newest =
drivers from
Veritas and that one worked. Since my implementation have have restored =
several
times including some SQL databases without any =
problem.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I have also now upgraded NBU to 6.0 =
MP2
and it still work without any problem.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>I use Emulex LP10000DCex =
HBA’s in
that mediaserver<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>/johnny<o:p></o:p></span></font></p>=
<div>
<div class=3DMsoNormal align=3Dcenter =
style=3D'margin:0cm;margin-bottom:.0001pt;
text-align:center'><font size=3D3 face=3D"Times New Roman"><span =
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<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>
</span></font></div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><b><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</spa=
n></font></b><font
size=3D2 face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> <st1:PersonName
w:st=3D"on">veritas-bu-admin AT mailman.eng.auburn DOT edu</st1:PersonName> =
[mailto:<st1:PersonName
w:st=3D"on">veritas-bu-admin AT mailman.eng.auburn DOT edu</st1:PersonName>] =
<b><span
style=3D'font-weight:bold'>On Behalf Of </span></b>Scott Jacobson<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> 5. april 2006 =
22:18<br>
<b><span style=3D'font-weight:bold'>To:</span></b>
veritas-bu AT mailman.eng.auburn DOT edu; Sekhon S.<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: [Veritas-bu] =
LTO3
maximum block size of 65536 bytes; abuffer size of 262144 cannot be =
used</span></font><o:p></o:p></p>
</div>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'>Simrat,<o:p></o:p></span></=
font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></f=
ont></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'>I've =
seen many
discussions in this forum about using 262144 for a buffer sizes on
Windows, and most of those discussions talk about it not being =
recommend
or successful based on Windows TCP/IP Stack size limitation. =
Others have
indicated they have been able to get buffers sizes like =
this to work
if your able "tweek" SCSI card parameters or registry =
settings
as you've mentioned.<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></f=
ont></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'>Based =
on your
error message, I'd say the registry may have changed, but again, your =
fighting
a fixed block size between the device and OS IP
Stack communications that changes it back to =
64K.<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></f=
ont></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'>I've =
also read
here that there is a unsupported Windows OS parameter change that can be =
made
as well, but again, I don't recall from anyone in this =
forum indicating
they've been able to make it work =
successfully.<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></f=
ont></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span style=3D'font-size:10.0pt;font-family:Tahoma'>I =
abandoned my
effort two years ago to get this to work and now use Linux Media =
and
Master servers to resolve this issue.<o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'> <o:p></o:p></span></f=
ont></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin:0cm;margin-bottom:.0001pt'><font =
size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'>Scott<br>
<br>
>>> "Sekhon Simrat S." <SSSekhon AT VASC DOT com> =
4/5/2006
11:20 am >>><o:p></o:p></span></font></p>
</div>
<div>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>We are using Netbackup 6.0 MP1 on Win2k3 STD with HP =
MSL
6030 tape library housing two Ultrium 3 LTO 960 drives. Any idea on how =
can we
change the block size from 64Kb to 256 Kb on the tape drive? We've =
change
the buffer size in Netbackup and it seems to be writing at 256kb but =
throws an
error <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>"The tape device at index -1 has a maximum block =
size
of 65536 bytes; a buffer size of 262144 cannot be =
used"<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>HP support pointed this to the SCSI adapter. I'm =
using LSI
PCI-X Ultra 320 SCSI adapter with the latest driver. According to LSI, =
there is
a registry change that needs to be done to overcome the Windows =
limitation of
64kb buffer size. This was changed to 256kb as per LSI =
requirements and
I'm still getting the above error. It seems like the drive just can't =
write
more than 64k. Any ideas how can this be changed to =
256?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks in advance.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Simrat<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
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size=3D2
face=3DTahoma><span =
style=3D'font-size:10.0pt;font-family:Tahoma'><o:p> </o:p></span></f=
ont></p>
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