Bill,
Can you post the output of "q devc f=d"? That may help us...
You can keep your existing storage pools for your LTO2 tapes, and define
new ones for your LTO3 tapes. That's what I did. In fact, I still
purchase and use LTO2 cartridges, because of our DR contract which does not
specify LTO3 drives, we send only LTO2 to our offsite vault.
By local convention, I include the media type in the storage pool name.
So, I have storage pools like "WIN_LTO2", "WIN_LTO3", and "WIN_LTO2_COPY".
The first two are primary pools, and the third is a copy pool (of course).
I backup both of the primary pools to WIN_LTO2_COPY.
I have four LTO3 drives and fourteen LTO2 drives in my STK library... TSM
will use the LTO3 drives for LTO2 operations when they come up in the
rotation... LTO3 operations will of course only use LTO3 drives. It is
possible that all LTO3 drives can have LTO2 media loaded when an LTO3
operation starts, which causes that session/process to wait for mount
points.
Your original LTO (LTO2) storage pool will always have only LTO2 volumes,
and your new LTO3 pool(s) will always have only LTO3 volumes. That's how
storage pools work, all volumes must be of the same type. Which media gets
used is determined by the destination in the copygroup... which points to a
storage pool, which has a device class, which specifies the format, which
determines the device type/recording density, etc... and the chosen media
will be loaded into an appropriate drive.
Hope this helps...
_Robin
Bill Dourado
<bill.dourado@ALS
TEC.COM> To
Sent by: "ADSM: ADSM-L AT VM.MARIST DOT EDU
Dist Stor cc
Manager"
<[email protected] Subject
.EDU> Re: TAPEPOOL made up of mixed LTO2
& LTO3 media
02/22/2007 05:13
AM
Please respond to
"ADSM: Dist Stor
Manager"
<[email protected]
.EDU>
Hi,
Thankyou to Robin and others for your useful comments.
Is it possible to retain and continue using some of my existing tape
storage pools
associated with device class LTO ; and create new ones associated with
device
class LTO3 . ?
Will the storage pools with LTO device class then use a mixture of LTO2
& 3 tapes ?
And the new storage pools LTO3 tapes only ?
Thanks
Bill
Robin Sharpe <Robin_Sharpe AT BERLEX DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
21/02/2007 19:37
Please respond to "ADSM: Dist Stor Manager"
To: ADSM-L AT VM.MARIST DOT EDU
cc:
Subject: Re: [ADSM-L] TAPEPOOL made up of mixed LTO2 & LTO3
media
If by "tapepool", you mean storage pool, then I don't think so. A storage
pool must be associated with one and only one device class. Each tape
volume has an associated device class. Your existing LTO2 tapes probably
use a device class with a format of "ULTRIUM2C", which allows the highest
capacity plus compression. When you introduce LTO3, you will probably
want
to use a device class with a format of "ULTRIUM3C", to take advantage of
LTO3's higher density. You will need a new storage pool (or pools) to
hold
your LTO3 tapes.
It is (apparently) possible to update the device class with a new
format...
at least the help for the update devclass command implies it... but I
don't know what would happen to an LTO2 tape with ACCESS=READWRITE if its
devclass was updated to ULTRIUM3C format... and I wouldn't risk trying
it.
Whether or not your library can support mixed media is another question
altogether. Some libraries can handle it seamlessly (like STK L700), and
other need to be partitioned into logical libraries with each partition
dedicated to the different media types.
Robin Sharpe
Berlex Labs
Bill Dourado
<bill.dourado@ALS
TEC.COM> To
Sent by: "ADSM: ADSM-L AT VM.MARIST DOT EDU
Dist Stor cc
Manager"
<[email protected] Subject
.EDU> TAPEPOOL made up of mixed LTO2 &
LTO3 media
02/21/2007 06:57
AM
Please respond to
"ADSM: Dist Stor
Manager"
<[email protected]
.EDU>
Hi,
We are about to replace our all HP LTO-2 tape drives by LTO-3,
in our NEO 4000 library.
My question is, seeing the new drives can read and write both LTO-2
and LTO-3 media, can any given existing tapepool be made up of
both LTO-2 and LTO-3 media ?
My problem is that I don't have enough tape slots in the library and
don't want to introduce a large number of LTO-3 tapes in one go.
Also a few of our LTO-2 tapes are fairly new and it would be a shame
to write them off.
(TSM Server for Windows 5.3)
Thanks
Bill
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