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Folks,
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I would like to know from fellow subscribers how many folks are using
dedicated HBAs for tape versus shared HBAs for disk and tape in SAN
environments. I am being told by a major library vendor that despite
having dual HBAs in hosts for redundant disk access, I need to install
additional HBAs to access their libraries. They are suggesting two main
issues:
=20
* Conflicting requirements in HBA set-up for disk and tape
* Potential conflict with multipathing/failover software
My proposal would not present multiple paths to a tape drive and my
understanding of the failover software we are proposing to use is that
it is disk specific and would not failover all I/O from one HBA to the
other.
=20
All comments appreciated.
=20
Regards,
=20
Paul Esson
Senior Support Engineer
Redstor Limited
Direct: +44 (0) 1224 595381
Mobile: +44 (0) 7766 906514
E-Mail: paul.esson AT redstor DOT com
Web: www.redstor.com
REDSTOR LIMITED
Torridon House
73-75 Regent Quay
Aberdeen
UK
AB11 5AR
Disclaimer:
The information included in this e-mail is of a confidential nature and
is intended only for the addressee. If you are not the intended
addressee, any disclosure, copying or distribution by you is prohibited
and may be unlawful. Disclosure to any party other than the addressee,
whether inadvertent or otherwise is not intended to waive privilege or
confidentiality.
=20
=20
Paul Esson
Senior Support Engineer
Redstor Limited
Direct: +44 (0) 1224 595381
Mobile: +44 (0) 7766 906514
E-Mail: paul.esson AT redstor DOT com
Web: www.redstor.com
REDSTOR LIMITED
Torridon House
73-75 Regent Quay
Aberdeen
UK
AB11 5AR
Disclaimer:
The information included in this e-mail is of a confidential nature and
is intended only for the addressee. If you are not the intended
addressee, any disclosure, copying or distribution by you is prohibited
and may be unlawful. Disclosure to any party other than the addressee,
whether inadvertent or otherwise is not intended to waive privilege or
confidentiality.
=20
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<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana=20
size=3D2>Folks,</FONT></SPAN></DIV>
<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana size=3D2>I =
would like to=20
know from fellow subscribers how many folks are using dedicated =
HBAs for=20
tape versus shared HBAs for disk and tape in SAN environments. I =
am being=20
told by a major library vendor that despite having dual HBAs in hosts =
for=20
redundant disk access, I need to install additional HBAs to access their =
libraries. They are suggesting two main =
issues:</FONT></SPAN></DIV>
<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana=20
size=3D2></FONT></SPAN> </DIV>
<UL>
<LI><SPAN class=3D018294409-10082004><FONT face=3DVerdana =
size=3D2>Conflicting=20
requirements in HBA set-up for disk and tape</FONT></SPAN></LI>
<LI><SPAN class=3D018294409-10082004><FONT face=3DVerdana =
size=3D2>Potential=20
conflict with multipathing/failover software</FONT></SPAN></LI></UL>
<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana size=3D2>My =
proposal would=20
not present multiple paths to a tape drive and my understanding of the =
failover=20
software we are proposing to use is that it is disk specific and would =
not=20
failover all I/O from one HBA to the other.</FONT></SPAN></DIV>
<DIV><SPAN class=3D018294409-10082004></SPAN> </DIV>
<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana size=3D2>All =
comments=20
appreciated.</FONT></SPAN></DIV>
<DIV><SPAN class=3D018294409-10082004></SPAN> </DIV>
<DIV><SPAN class=3D018294409-10082004><FONT face=3DVerdana=20
size=3D2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=3D018294409-10082004></SPAN> </DIV>
<DIV><SPAN class=3D018294409-10082004>
<DIV class=3DSection1>
<P class=3Dsection1 style=3D"MARGIN-BOTTOM: 12pt"><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Paul Esson<BR>Senior =
Support=20
Engineer<BR>Redstor Limited<BR><BR>Direct:=20
+44 (0) 1224 =
595381<BR>Mobile:=20
+44 (0) 7766 =
906514<BR>E-Mail:=20
=20
paul.esson AT redstor DOT
com<BR>Web: &=
nbsp; =20
www.redstor.com<BR><BR>REDSTOR LIMITED<BR>Torridon House<BR>73-75 Regent =
Quay<BR>Aberdeen<BR>UK<BR>AB11 5AR<BR><BR>Disclaimer:<BR>The information =
included in this e-mail is of a confidential nature and is intended only =
for the=20
addressee. If you are not the intended addressee, any disclosure, =
copying=20
or distribution by you is prohibited and may be unlawful. =
Disclosure to=20
any party other than the addressee, whether inadvertent or otherwise is =
not=20
intended to waive privilege or confidentiality.<?xml:namespace prefix =
=3D o ns =3D=20
"urn:schemas-microsoft-com:office:office"=20
/><o:p></o:p></SPAN></P></DIV> </SPAN></DIV>
<DIV><FONT face=3DVerdana size=3D2></FONT> </DIV>
<DIV class=3DSection1>
<P class=3Dsection1 style=3D"MARGIN-BOTTOM: 12pt"><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Verdana">Paul Esson<BR>Senior =
Support=20
Engineer<BR>Redstor Limited<BR><BR>Direct:=20
+44 (0) 1224 =
595381<BR>Mobile:=20
+44 (0) 7766 =
906514<BR>E-Mail:=20
=20
paul.esson AT redstor DOT
com<BR>Web: &=
nbsp; =20
www.redstor.com<BR><BR>REDSTOR LIMITED<BR>Torridon House<BR>73-75 Regent =
Quay<BR>Aberdeen<BR>UK<BR>AB11 5AR<BR><BR>Disclaimer:<BR>The information =
included in this e-mail is of a confidential nature and is intended only =
for the=20
addressee. If you are not the intended addressee, any disclosure, =
copying=20
or distribution by you is prohibited and may be unlawful. =
Disclosure to=20
any party other than the addressee, whether inadvertent or otherwise is =
not=20
intended to waive privilege or =
confidentiality.<o:p></o:p></SPAN></P></DIV>
<DIV> </DIV></BODY></HTML>
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