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Well not exactly. It does however know how many tape blocks to expect =
during a read process and if the blocks expected differs from the blocks =
read, it will generate an error.
=20
Similarly upon the creation of the backup job, NBU does the same.
=20
You do have the option after the backup to run a VERIFY manually on a =
particular backup image on a particular media. This will compare what =
NBU has recorded in its database with what is on tape.
=20
David A. Chapa | ADIC | 720.272.8452 cell | http://www.adic.com =
<http://www.adic.com> =20
Sr. Technical Advisor=20
Pathlight VX - http://www.adic.com/gopathlightvx
=20
=20
=20
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu =
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Jonas =
Bl=E5berg
Sent: Friday, October 08, 2004 2:10 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Reliability when restoring
=20
Hello!=20
If I restore files from a Netbackup tape and the restore log file says =
the files were restored successfully, is it 110% guaranteed that the =
files actually were restored correctly? Does Netbackup use check sums or =
something else to check the restored files?
/jonas bl=E5berg=20
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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><!-- Converted from text/rtf format =
-->Well
not exactly.<span style=3D'mso-spacerun:yes'>=A0 </span>It does however =
know how
many tape blocks to expect during a read process and if the blocks =
expected
differs from the blocks read, it will generate an =
error.<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'><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'>Similarly upon the creation of the =
backup job,
NBU does the same.<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'><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'>You do have the option after the =
backup to
run a VERIFY manually on a particular backup image on a particular =
media. <span
style=3D'mso-spacerun:yes'>=A0</span>This will compare what NBU has =
recorded in its
database with what is on tape.<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'><o:p> </o:p></span></font></p>
<div>
<p><font size=3D1 color=3Dnavy face=3D"Arial Black"><span =
style=3D'font-size:7.5pt;
font-family:"Arial =
Black";mso-bidi-font-family:Arial;color:navy;mso-no-proof:
yes'>David A. Chapa</span></font><span
class=3DStyleNormalWebLatinArialComplexArial75ptChar><font size=3D1 =
color=3Dnavy
face=3DArial><span =
style=3D'font-size:7.5pt;color:navy;mso-no-proof:yes'> | =
</span></font></span><font
size=3D1 color=3Dred face=3D"Arial Black"><span =
style=3D'font-size:7.5pt;font-family:
"Arial =
Black";mso-bidi-font-family:Arial;color:red;mso-no-proof:yes'>ADIC</span>=
</font><span
class=3DStyleNormalWebLatinArialComplexArial75ptChar><font size=3D1 =
color=3Dnavy
face=3DArial><span =
style=3D'font-size:7.5pt;color:navy;mso-no-proof:yes'> |
720.272.8452 cell | </span></font></span><font color=3Dnavy =
face=3DArial><span
style=3D'font-family:Arial;color:navy;mso-no-proof:yes'><a
href=3D"http://www.adic.com";><font size=3D1><span =
style=3D'font-size:7.5pt'>http://www.adic.com</span></font></a></span></f=
ont><font
size=3D1 color=3Dnavy><span =
style=3D'font-size:7.5pt;color:navy;mso-no-proof:yes'> <br>
</span></font><span =
class=3DStyleNormalWebLatinArialComplexArial75ptChar><font
size=3D1 color=3Dnavy face=3DArial><span =
style=3D'font-size:7.5pt;color:navy;
mso-no-proof:yes'>Sr. Technical Advisor</span></font></span><font =
size=3D1
color=3Dnavy><span =
style=3D'font-size:7.5pt;color:navy;mso-no-proof:yes'> =
<o:p></o:p></span></font></p>
<p><font size=3D1 color=3Dred face=3D"Arial Black"><span =
style=3D'font-size:7.5pt;
font-family:"Arial =
Black";mso-bidi-font-family:Arial;color:red;mso-no-proof:
yes'>Pathlight VX – =
http://www.adic.com/gopathlightvx<o:p></o:p></span></font></p>
<p><font size=3D1 color=3Dnavy face=3D"Times New Roman"><span =
style=3D'font-size:7.5pt;
color:navy;mso-no-proof:yes'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy;mso-no-proof:yes'><o:p> </o:p><=
/span></font></p>
</div>
<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b>
veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] <b><span =
style=3D'font-weight:
bold'>On Behalf Of </span></b>Jonas Bl=E5berg<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Friday, October 08, =
2004
2:10 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b>
veritas-bu AT mailman.eng.auburn DOT edu<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [Veritas-bu] =
Reliability
when restoring</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'><o:p> </o:p></span></font></p>
<p style=3D'margin-left:.5in'><font size=3D2 face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial'>Hello!</span></font> <o:p></o:p></p>
<p style=3D'margin-left:.5in'><font size=3D2 face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial'>If I restore files from a Netbackup tape and =
the
restore log file says the files were restored successfully, is it 110%
guaranteed that the files actually were restored correctly? Does =
Netbackup use
check sums or something else to check the restored =
files?</span></font><o:p></o:p></p>
<p style=3D'margin-left:.5in'><font size=3D2 face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial'>/jonas bl=E5berg</span></font> <o:p></o:p></p>
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