You didn't mention your local server hardware/OS or how its connected (
SCSI/Fiber). You should see an LTO2 burst to at least 20ish MB/sec if its
locally attached and doing a local backup. I've seen locally attached LTO2
(LVD SCSI) burst to 50-60MB/sec(Sun 480R).
Also the original poster may want to look at the StorageTek L20 (20 slot) or
L40 (40 slot) libraries. The Quantum/ATL M1500 is also nice with the
remote PRISM management and alerting card. Yes, I agree you'll need
gigabit network connectivity to drive the tape drives for network backups;
the added capacity is always nice to have also.
Robert Maiello
Pioneer Data Systems
On Tue, 14 Sep 2004 13:48:44 -0600, Librado Pamintuan <LPamintuan AT REGINA DOT
CA>
wrote:
>We just recently upgraded out tape library from STK 9714 with 6 DLT 7000
>tape drives to an ADIC Scalar 100 with 2 LTO Gen-2 drives.
>According to the brochure and 'product highlights', the LTO Gen-2 is
>capable of 35 Mb/sec. throughput, but they should have mentioned
>'depending on your equipment'. Now that our LTO tape library is in
>production, the highest throughput we achieved so far is 16 Mb/sec. and
>that is a local backup.
>
>In order to achieve this 'blazing' throughput you need to have a pure
>Gigabit connection or not even, a Fibre optic would do.
>Even if your Network is Fibre opti, how about your clients, are they
>powerful enough to push data during backups? Yes, the servers have the
>most powerful CPU's and RAMs, how about your disk drives speed?
>
>It all boils down to 'Performance Tuning'.
>
>Regarding the tape libraries, we reviewed a lot of tape libraries and
>for a competitive price, ADIC Scalar 100 with 36 slots, 2 LTO Gen-2 tape
>drives give us enough slots and upgradability without adding equipment
>outside the box.
>
>regards,
>
>
>
>
>Librado Pamintuan
>Technical Support Analyst II
>Information Systems Dep.
>Operations Group
>City of Regina
>
>Phone: (306) 777-7573
>General Fax: (306) 777-6804
>eFax: (306) 546-6002
>eMail: lpamintuan AT regina DOT ca
>
>>>> mussulma AT CS.UIUC DOT EDU 09/14/04 10:28am >>>
>Sorry if this is a little off topic, but I'm interested in the
>experience and feedback from this list. We're finally getting ready
>to
>upgrade our backups hardware from DLT to LTO, and potentially upgrade
>the server as well.
>
>I figure we can upgrade our 60 slot, 4 DLT drive library to a 20-30
>slot, 2 drive library, so I'm looking at the smaller LTO2 libraries.
>So
>far I'm looking at the Overland Neo 2000, the ADIC Scalar 24, the
>Qualstar RLS series. Are there any other products I should be looking
>at, or comments/endorsements/warnings on these?
>
>I hate to buy LTO2 when LTO3 is getting so close in the roadmap, but
>we
>need to age out a failing DLT library. Does anyone know any data on
>when LTO3 products will hit the market?
>
>The other major upgrade would be the backup server hardware. We're
>currently running off an Sun E450 (shared with other services.) The
>rest of our services are migrating over to Linux. My question, for
>those who have Linux Networker servers, what kind of hardware supports
>the processor/IO strain of a backup server? Are you satisfied with
>it,
>or should I stay with Sun?
>
>Thanks,
>Dave
>
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