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Hi,
A few weeks ago I pulled the last two DLT 7000 drives from a
couple of STK L700 libraries. I had not been recording data on these two
drives since mid-July, though I do have monthly fulls with 7 month
retention sitting on DLT IV media the DLT 7000 drives had been using. The
remaining SDLT 220 drives in the L700 libraries have a dedicated metal in
gap (MIG) read head specifically to read DLT IV media. I felt brave at
the time. I felt I could figure out how to read DLT IV media with the
SDLT 220s thru NetBackup if a restore request came in.
Guess what happened? :-)
OK, I can't find anything in the documentation on how to support
backward read capability of newer drive types which support older media
types. Remember, backward read-compatability also applies to LTO drives &
media, so this is a forward-going issue.
I contacted Symantec support. God bless Australia, but the
support tech suggested lying about the media type by using "vmchange
-new_mt dlt2 -m L30022". This experiment failed:
mounting L30022
error requesting media TpErrno = Requested number of
drives are not configured
following files not restored....
Does anyone know how NetBackup can support the native backward
read-compatability of SDLT drives with DLT IV media?
Michael F. Lavelle Abbott Labs,
Sr. Storage Engineer, CIT 100 Abbott Park Rd, AP14B-1
Ph: 847.937.1195 (Page:389.5746) Abbott Park IL 60064-6042
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<br><font size=2 face="Arial">Hi,</font>
<br><font size=2 face="Arial"> A few weeks ago I
pulled the last two DLT 7000 drives from a couple of STK L700 libraries.
I had not been recording data on these two drives since mid-July, though
I do have monthly fulls with 7 month retention sitting on DLT IV media the DLT
7000 drives had been using. The remaining SDLT 220 drives in the L700
libraries have a dedicated metal in gap (MIG) read head specifically to read
DLT IV media. I felt brave at the time. I felt I could figure out
how to read DLT IV media with the SDLT 220s thru NetBackup if a restore request
came in.</font>
<br>
<br><font size=2 face="Arial"> Guess what happened?
:-)</font>
<br>
<br><font size=2 face="Arial"> OK, I can't find
anything in the documentation on how to support backward read capability of
newer drive types which support older media types. Remember, backward
read-compatability also applies to LTO drives & media, so this is a
forward-going issue.</font>
<br><font size=2 face="Arial"> I contacted Symantec
support. God bless Australia, but the support tech suggested lying about
the media type by using "vmchange -new_mt dlt2 -m L30022". This
experiment failed:</font>
<br>
<br><font size=2 face="Arial">
mounting L30022</font>
<br><font size=2 face="Arial">
error requesting media TpErrno = Requested number of drives are
not configured</font>
<br><font size=2 face="Arial">
following files not restored....</font>
<br>
<br>
<br><font size=2 face="Arial"> Does anyone know how
NetBackup can support the native backward read-compatability of SDLT drives
with DLT IV media? <br>
<br>
</font>
<br><font size=2 face="Arial"><br>
Michael F. Lavelle
Abbott Labs, <br>
Sr. Storage Engineer, CIT
100 Abbott Park Rd, AP14B-1<br>
Ph: 847.937.1195 (Page:389.5746) Abbott Park IL
60064-6042</font>
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