Roy,
I agree with Juraj Salak,
And would add you are playing with fire ! Not only that you are turning a
"Rolls Royce" solution
Tape problems should not be corrected with tickering, get back the DR
copies!! PLEASE .... You will not regret it in 2-3 years. We have more than
100,000 x 3590's on and off site, most are managed via ADSM/tivoli
Create a copy pool called "DISASTER-RECOVER". We do not often use Disaster
Tapes, BUT we do!!! . All data is critical in my business. These go "off
site", of course you can send your original pools offsite as well, but send
them to another, off site storage company, this eliminates double point of
failure.
If you want more advise, you can email me directly.
Stephen Pole
Operations Manager - Senior Geophysicist
Landmark Graphics Corporation (A Halliburton Company)
Level 4, IBM Centre
1060 Hay Street
WEST PERTH WA 6005
Phone : +61 (0)8 9320 9080
Direct : +61 (0)8 9320 9081
Mobile: +61 (0)4 2121 0157
Residence : +61 (0)8 9409 3012
Email : [EMAIL PROTECTED]
[EMAIL PROTECTED] (private)
NOTE : PERTH WA TIME is GMT + 8.00 hours
-----Original Message-----
From: Salak Juraj [mailto:[EMAIL PROTECTED]]
Sent: Friday, 12 April 2002 5:59 PM
To: [EMAIL PROTECTED]
Subject: Re: How do I know what tape/s my data is on?
Roy,
I hesitate to answer your question,
because it would support you in a VERY BAD practise.
I find operation with only single copy of data simply irresponsible.
The costs for second copy are very low - only couple of tape media.
Do rethink this design, consider creating backup pool.
This makes it possible to keep tapes from primary pool
unloaded from library but still on-site,
thus eliminating your find-correct-tape problem.
regards
Juraj Salak
-----Original Message-----
From: Roy Lake [mailto:[EMAIL PROTECTED]]
Sent: Friday, April 12, 2002 11:03 AM
To: [EMAIL PROTECTED]
Subject: How do I know what tape/s my data is on?
Ok guys,
Here is a puzzler for you.
Lets say that I have a primary tape pool, but I DONT have a secondary
pool. (IE data ONLY goes to tape once with NO second copy). We then send
those tapes offsite. (This saves us valuable space in the tape
library).
One month later, a customer asks for an archive to be retrieved from
those tapes.
How do I know what tapes to retrieve? - These archives would have built
up over a period of time, so there may be more than 10 tapes offsite and
I dont want them all!!.
Is there a way that I can find out which set of tapes my archived data
is on? - Bearing in mind that if reclamation is also run of this pool,
then the data may possibly be moved around on a regular basis.
Any help would be greatfully recieved.
Kind Regards,
Roy Lake
RS/6000 & TSM Systems Administration Team
Tibbett & Britten European I.T.
Judd House
Ripple Road
Barking
Essex IG11 0TU
0208 526 8853
[EMAIL PROTECTED]
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