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[Veritas-bu] LTO3 maximum block size of 65536 bytes; a buffer size of 262144 cannot be used
2006-04-05 13:20:04
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Subject: |
[Veritas-bu] LTO3 maximum block size of 65536 bytes; a buffer size of 262144 cannot be used |
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From: |
SSSekhon AT VASC DOT com (Sekhon Simrat S.) |
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Date: |
Wed, 5 Apr 2006 13:20:04 -0400 |
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Hello,
=20
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=20
=20
"The tape device at index -1 has a maximum block size of 65536 bytes; a
buffer size of 262144 cannot be used"
=20
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?
=20
Thanks in advance.
=20
Simrat
=20
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<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>
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