Ooops forgot about that.
Our backup server is an IBM pSeries 7029-6C3 with dual 1.2 Ghz POWER4
processors and 2 Gb RAM. Connected to the network using a Gigabit card,
the library is connected to the server using a PCI Dual Channel Ultra3
SCSI adapter card using LVD scsi cables.
However, even though we have GigE card on our server and some of the
clients and Gig switch, our Network backbone is still on 10/100 Mbps.
Librado
>>> Robert Maiello <robert.maiello AT PFIZER DOT COM> 09/14/04 02:27pm >>>
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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