Scary? Sure, if a tape goes bad, but that's why we have
copypools.
In my environment it's more like a miracle <queue angelic
chorus>, especially when you have a host that is archiving about 500GB
of data a day to a 5 year retention. (do the math... with expected
growth, that is over 1 petabyte of data by the time we reach 5 years,
and that's just 1 host).
Our 3494 was over-full, with about 2/3 of the 3590 tapes outside of
the library. We are still in the process of migrating the data from 3590
to 3592 media, but in the end, we expect to fit all the data back into
the library, at least for a little while.
(hence, you actually can put the genie back into the bottle ;-)
Ben
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of
Sung Y Lee
Sent: Wednesday, December 22, 2004 9:05 AM
To: ADSM-L@VM.MARIST.EDU
Subject: Re: Tape Questions
Wow... 1 TB of data on one tape. Is this a scary thought or what.
Sung Y. Lee
John Benik
<[EMAIL PROTECTED]
ROSSMN.COM>
To
Sent by: "ADSM: ADSM-L@VM.MARIST.EDU
Dist Stor
cc
Manager"
<[EMAIL PROTECTED]
Subject
.EDU> Re: Tape Questions
12/22/2004 10:53
AM
Please respond to
"ADSM: Dist Stor
Manager"
<[EMAIL PROTECTED]
.EDU>
It all depends on the type of media you are using. IBM's 3592 holds
300gb native and compressed it can contain almost 1TB. STK 9840 holds
about 20GB native and they figure compression at 4:1 so 80GB compressed.
a 3490E holds about 2.5gb compressed.
Thanks
John Benik
"Lepre, James" <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> 12/22/2004
08:45 AM Please respond to
"ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU>
To
ADSM-L@VM.MARIST.EDU
cc
Subject
Re: Tape Questions
Hello All,
I have a question is there a rule of thumb for how many tapes will
be used, when using TSM. I heard that for every Terabyte that is backed
up, 1000 tapes could be used. I was just wondering, if anybody knew
something different. I keep 2 versions for 7 days
Thanks
James
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