Re: [Veritas-bu] LTO3 to LTO4 conversion

The LTO spec says the drives should be able to write to media one generation back, and read two generations back. So an LTO4 should be able to read and write to LTO3 media, and read from LTO2 media.

Like Jeff said, use barcode rules to assign the LTO2/3 tapes to a different media type and/or volume pools, and make sure none of your backup policies are writing to that media type or pool, and let them expire of their own accord. If there is some reason to get off the older media before the images expire, you'll have to use bpduplicate to copy the images to LTO4 media.

-
Dean

On Tue, May 4, 2010 at 2:24 AM, Nate Sanders <sandersn AT dmotorworks DOT com> wrote:

Are you saying we can have LTO2/3/4 all active in the same library? I
was under the impression we couldn't start using LTO4 tapes until we
phased out the LTO2 tapes?

Jeff Cleverley wrote:
> If all you need to do to migrate to the new media is scan them in the
> library and assign them to the correct media pool.
>
> The gen4 drives will be able to write to the gen3 tapes and read from
> the gen2 if you need to do restores. If you plan on phasing out the
> older media when they expire you might want to either write protect
> the tapes or set up a barcode rule to move specific labels to
> something other than the backup or scratch pool. This will keep them
> from getting used again.
>
> Jeff
>
> On Mon, May 3, 2010 at 9:52 AM, Nate Sanders <sandersn AT dmotorworks DOT com> wrote:
>
>> The drives are currently LTO4, the tape is LTO2/3. All we need to do is
>> migrate to LTO4 media.
>>
>>
>> Martin, Jonathan wrote:
>>
>>> Are you looking to replace an existing LTO3 library / drives with LTO4?
>>> Or are you trying to copy data from LTO3 to LTO4 tapes?
>>>
>>> -Jonathan
>>>
>>> -----Original Message-----
>>> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
>>> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Nate
>>> Sanders
>>> Sent: Monday, May 03, 2010 11:24 AM
>>> To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
>>> Subject: [Veritas-bu] LTO3 to LTO4 conversion
>>>
>>> Forgive me for what may be a straight forward question, but our last
>>> backup admin has left and I'm doing my best to step up and keep our
>>> systems moving along. I'm looking for a general outline of an LTO3 to
>>> LTO4 conversion with Netbackup 5.1 (upgrading is on the list, but we
>>> can't wait to complete it). Right now we still have some LTO2 tapes, and
>>> I believe I must migrate and/or eject and store these in order to
>>> complete the conversion. Are there any other gotchas or need to knows I
>>> must be aware of?
>>>
>>> Thank you much.
>>>
>>> P.S. New member to the list, working on getting scheduled for some
>>> on-line courses.
>>>
>>>
>>>
>> --
>> Nate Sanders Digital Motorworks
>> System Administrator (512) 692 - 1038
>>
>>
>>
>>
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>
>
>
>

--
Nate Sanders Digital Motorworks
System Administrator (512) 692 - 1038

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