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



--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing

list

To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing

list

To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing

list

To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.