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Yes, I've been told the same.
-sj
>>> "Paul Keating" <pkeating AT bank-banque-canada DOT ca> 11/4/2005 2:14 pm
>>>
Hmmm....The StorageTek rep is telling us that if the tape has an LTO2
label (L2 postfix) that the LTO3 drives in the library will read/write
to the tape in LTO2 format, such that an LTO2 drive will continue to
be
able to read/write to that tape.
Interesting?
Paul
> -----Original Message-----
> From: Mark.Donaldson AT cexp DOT com [mailto:Mark.Donaldson AT cexp DOT com]
> Sent: October 27, 2005 12:57 PM
> To: Paul Keating; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] using lto2 media in lto3 drives
>
>
> I can't speak for LTO2 to LTO3 but I have LTO1 & LTO2.
>
> LTO1 media, once *written* in an LTO2 drive is no longer
> readable in an LTO1
> drive. That's made it difficult on my side to slowly
> convert, too. LTO2
> writes more efficiently on LTO1 tape, increasing the
> effective data density,
> but the data is unreadable in and LTO1 drive.
>
> I ended up building multiple storage units with different
> media types &
> slowly added the denser media as a new media type to match.
>
> There's a report that restores are media-type aware, too. I
> thought I could
> "fake" my media on my long-term storage, using vmchange to
> convert my filled
> offsite media to HCART2 so that it would read in my LTO2
> drives. I've been
> told that I would shoot myself in the foot on restores.
> While you can fake
> convert empty media to a new media type, filled media would
> fail in restore.
> Somewhere in the DB, says the report, if a restore is
> triggered, it says
> "such-and-so file is on tape XX whick is HCART media". If
> vmchange was used
> to "convert" the media type to HCART2, then the restore fails
> because the
> media type doesn't match.
>
> I haven't tried this yet - I should test it thoroughly - but it's a
> consideration.
>
> -M
>
>
> -----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
> Paul Keating
> Sent: Thursday, October 27, 2005 6:05 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] using lto2 media in lto3 drives
>
>
> I just got some new drives for my environment, going into my
> 2 L700s with my
> existing LTO2 drives.
>
> at the moment, the robot is full of LTO2 media, and we don't
> intend to add
> LTO 3 media for a while....is there any voodoo needed to get
> the LTO3 drives
> to oprate properly with the lto2 media?
>
> Paul
>
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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<DIV>Yes, I've been told the same.</DIV>
<DIV>-sj<BR><BR>>>> "Paul Keating" <pkeating@bank-banque-canada=
.ca> 11/4/2005 2:14 pm >>><BR>Hmmm....The StorageTek rep is =
telling us that if the tape has an LTO2<BR>label (L2 postfix) that the =
LTO3 drives in the library will read/write<BR>to the tape in LTO2 format, =
such that an LTO2 drive will continue to be<BR>able to read/write to that =
tape.<BR><BR>Interesting? <BR><BR>Paul<BR><BR>> -----Original Message---=
--<BR>> From: Mark.Donaldson AT cexp DOT com [mailto:Mark.Donaldson AT cexp
DOT com] =
<BR>> Sent: October 27, 2005 12:57 PM<BR>> To: Paul Keating; =
veritas-bu AT mailman.eng.auburn DOT edu<BR>> Subject: RE: [Veritas-bu]
using =
lto2 media in lto3 drives<BR>> <BR>> <BR>> I can't speak for LTO2 =
to LTO3 but I have LTO1 & LTO2.<BR>> <BR>> LTO1 media, once =
*written* in an LTO2 drive is no longer <BR>> readable in an LTO1<BR>>=
; drive. That's made it difficult on my side to slowly <BR>> =
convert, too. LTO2<BR>> writes more efficiently on LTO1 tape, =
increasing the <BR>> effective data density,<BR>> but the data is =
unreadable in and LTO1 drive.<BR>> <BR>> I ended up building =
multiple storage units with different <BR>> media types &<BR>> =
slowly added the denser media as a new media type to match.<BR>> =
<BR>> There's a report that restores are media-type aware, too. I =
<BR>> thought I could<BR>> "fake" my media on my long-term storage, =
using vmchange to <BR>> convert my filled<BR>> offsite media to =
HCART2 so that it would read in my LTO2 <BR>> drives. I've =
been<BR>> told that I would shoot myself in the foot on restores. =
<BR>> While you can fake<BR>> convert empty media to a new media =
type, filled media would <BR>> fail in restore.<BR>> Somewhere in =
the DB, says the report, if a restore is <BR>> triggered, it says<BR>>=
; "such-and-so file is on tape XX whick is HCART media". If <BR>> =
vmchange was used<BR>> to "convert" the media type to HCART2, then the =
restore fails <BR>> because the<BR>> media type doesn't match.<BR>>=
; <BR>> I haven't tried this yet - I should test it thoroughly - but =
it's a<BR>> consideration.<BR>> <BR>> -M<BR>> <BR>> =
<BR>> -----Original Message-----<BR>> From: veritas-bu-admin@mailman.=
eng.auburn.edu<BR>> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT
edu]On =
Behalf Of <BR>> Paul Keating<BR>> Sent: Thursday, October 27, 2005 =
6:05 AM<BR>> To: veritas-bu AT mailman.eng.auburn DOT edu<BR>> Subject: =
[Veritas-bu] using lto2 media in lto3 drives<BR>> <BR>> <BR>> I =
just got some new drives for my environment, going into my <BR>> 2 =
L700s with my<BR>> existing LTO2 drives.<BR>> <BR>> at the =
moment, the robot is full of LTO2 media, and we don't <BR>> intend to =
add<BR>> LTO 3 media for a while....is there any voodoo needed to get =
<BR>> the LTO3 drives<BR>> to oprate properly with the lto2 =
media?<BR>> <BR>> Paul<BR>> <BR><BR>______________________________=
_________________<BR>Veritas-bu maillist - [email protected]=
ng.auburn.edu<BR>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu<=
BR></DIV></BODY></HTML>
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