RE: Which Tape Drive?

Yeah, quite an upgrade, Charles! We're even thinking about taking on
archiving of my previous employer's data and program libraries (they went
out of business but are subject to audit for 5-7 years). This morning I'm
running at 75.6% disk used. It would probably go to <20% (just throwing out
a number 'cause I have no idea what the OS and LLPs would take).

Jerry C. Adams
IBM i Programmer/Analyst
Members and Non-Members Only - sign outside Mexico's Mandinga Disco
--
A&K Wholesale
Murfreesboro, TN
615-867-5070


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Charles Wilt
Sent: Thursday, April 07, 2011 8:41 AM
To: Midrange Systems Technical Discussion
Subject: Re: Which Tape Drive?

I know 3 drive RAID-5 has been horribly slow in the past...perhaps not
the case with the SAS drives in power 7...

But you may want to make it a 4 drive set just to be safe...

On the other hand...just penetrated that your existing system has
2x8GB Mirrored....yikes...what an upgrade! :)

Charles

On Thu, Apr 7, 2011 at 9:29 AM, Jerry C. Adams <midrange@xxxxxxxx> wrote:

On our current Model 250 we have 8GB drives - two, mirrored.  We currently
have a 6382 tape cartridge drive.  The backup, which saves *ALLUSR
libraries, runs at night (at 2330). Can't remember how long it takes, but
it's certainly finished by the time I get here (around 0500).

The proposed system would have three [3] 146GB drives RAID-5.  Now I do
plan/hope to take advantage of the non-QSYS portion of the IFS for

requested

process upgrades, but no idea how much space would be involved.  The

current

*ALLUSR library sizes would pretty much be the same on the new system.

Jerry C. Adams
IBM i Programmer/Analyst
It [death] is what we must all come to if we only live long enough. -

David

Garrick, 18th century actor
--
A&K Wholesale
Murfreesboro, TN
615-867-5070


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Charles Wilt
Sent: Thursday, April 07, 2011 8:13 AM
To: Midrange Systems Technical Discussion
Subject: Re: Which Tape Drive?

4MM DAT
--much much slower
--much much less capacity
++cheaper tapes

What tape do you have now?

My preference would be LTO.  I'd also shoot toward getting a drive
that will hold a complete system backup on one tape.  How much DASD
are you looking at?

Perhaps you can get an LTO4 or even LTO3 drive

Charles


On Thu, Apr 7, 2011 at 8:54 AM, Jerry C. Adams <midrange@xxxxxxxx> wrote:

Getting back to our Power 7 proposal, an LTO5 and 4MM have been proposed

as

alternatives.  I see LTO mentioned all of the time in the list, but the

cost

of the 4MM is about $2k less.  So what would be the downside/advantage of
going to the cheaper 4MM?



Jerry C. Adams

IBM i Programmer/Analyst

The streets are safe in Philadelphia, it's only the people who make them
unsafe. - Frank Rizzo, major of Philadelphia

--

A&K Wholesale

Murfreesboro, TN

615-867-5070



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