[Veritas-bu] SDLT vs LTO Ultrium

Our broadcast group uses DTF2 drives which do like 200MB (or 250MB) native
at 25MBps.  Those DTF2 tapes are about the size of a small country, bigger
than a VCR tape!!  They are also priced about the same as 9940B's, a
competiting product line from Sony I think.  Our broadcast group uses them
to archive video and databases and the such, I'm not to sure what the load
speed is but I assume it's comparable.

A guy could use a DTF tape to hold up his camaro while changing the oil,
those things are so BIG.

Steve Curry
Yahoo! Inc.

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Greg Musi
Sent: Wednesday, December 11, 2002 3:50 AM
To: 'veritas-bu AT mailman.eng.auburn DOT edu '
Subject: RE: [Veritas-bu] SDLT vs LTO Ultrium


Keep in mind that there is a large difference between the T9940B drives
(which are relatively new) as opposed to the older T9940A drives.

The "B" version specs are 30MB/sec native throughput(before compression) and
200GB native capacity.  Also, they are true 2GB fibre devices that support
fabric logon (not FC-AL).  To my knowledge, there is no other drive that is
close to that.

-----Original Message-----
From: Steve Curry
To: Winkeler, Paul; veritas-bu AT mailman.eng.auburn DOT edu
Sent: 12/11/2002 3:48 AM
Subject: RE: [Veritas-bu] SDLT vs LTO Ultrium

This isn't voodoo magic though... I'll bet a widget that the database
has a
lot of compressible table space.  We see the simular results using
AIT2/3,
DTF2 and LTO media.  Databases are highly compressible when there's a
lot of
empty table space, it freaks you out at first. ;)  I personally think
9940's
are a waste of money, I tested LTO and 9940 drives side by side for 6
months
and chose LTO... why? because they did dang near the same thing and were
both just as reliable as the other but the LTO drives cost *MUCH* less.
:)
It's interesting to read through all the responses of this thread, kudos
to
whomever started it.

Paul, I'm curious what model of emulex HBA's you're using?  I'm running
them
here and we have nothing but great performance out of them.

Steve Curry
Yahoo! Inc.

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Winkeler,
Paul
Sent: Tuesday, December 10, 2002 8:17 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] SDLT vs LTO Ultrium


OfficeMax is in the midst of converting over to STK's T9940B drives,
connecting them via 2Gbit Fiber Channel through EMC (read McData) edge
switches to a pair of Sun E6500 media servers.  Although we are still
struggling with the Emulex HBA's performing at much less than expected
throughput we have already observed these T9940B drives running at
speeds
over 45Mbytes/sec.  In addition, the 3.3TByte production SAP database
now
takes up 4 (yes, you are reading that correctly, four!) T9940
cartridges.
That is to say, we have data cartridges with more than 1 Terrabyte of
data
on them!

Of course these T9940B drives do not come cheaply :-)

 PaulW

---
Paul Winkeler, IT Consultant
216-471-3795


-----Original Message-----
From: Douglas Ritschel [mailto:dritschel62 AT yahoo DOT com]
Sent: Tuesday, December 10, 2002 4:40 PM
To: Caddell, Scott; Scott Jacobson; veritas-bu AT mailman.eng.auburn DOT edu;
jkennedy AT qualcomm DOT com; rob AT worman DOT org
Subject: RE: [Veritas-bu] SDLT vs LTO Ultrium


What about the Storagetek 9940B drives? Does anyone
have any experience with them?


--- "Caddell, Scott" <dcaddell AT intersil DOT com> wrote:
> There were issues early on with the firmware of the
> SDLT 220, but starting with Firmware rev 35, SDLT
> has been great.
>
> [Caddell, Scott]
>  -----Original Message-----
> From: Scott Jacobson [mailto:SJACOBSO AT novell DOT com]
> Sent: Tuesday, December 10, 2002 2:25 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu;
> jkennedy AT qualcomm DOT com; rob AT worman DOT org;
> dritschel62 AT yahoo DOT com
> Subject: RE: [Veritas-bu] SDLT vs LTO Ultrium
>
>
>
> Yes please tell more, we are about to evaluate the
> M2500 with SDLT 320's - anyone seen any problems?
>
> Thanks,
> Scott J.
>
>
> >>> "Kennedy, Jeffrey" <jkennedy AT qualcomm DOT com>
> 12/10/02 11:32AM >>>
> I would be very interested to hear what problems
> you're referring to.  I
> was using SDLT 220 models and had no issues with at
> all.  Minus the
> occasional NBU problem of course.
>
> In my current position the operations group just
> bought 20 SDLT 320's
> (or is it 330's?) and they love them.  There are 45
> more on order.  So
> far they've had no problems.
>
> Can you give specifics?  I'm sure I'm not the only
> one interested.
>
> ~JK
>
> -----Original Message-----
> From: Rob Worman [ mailto:rob AT worman DOT org]
> Sent: Tuesday, December 10, 2002 9:12 AM
> To: Douglas Ritschel; veritas-ng
> Subject: Re: [Veritas-bu] SDLT vs LTO Ultrium
>
> doug you didn't hear it from me, but if you're at a
> decision point
> right now, choose LTO's.
>
> there have been, and continue to be, really really
> unpleasant
> problems with even the latest versions of the SDLT
> firmware from
> quantum.
>
> for that reason alone, LTO's are the winner of SDLT
> in my opinion.
> feel free to share this with the list, but leave my
> name out of it
> please.
>
> HTH
> rob
>
>
> At 7:30 AM -0800 12/10/02, Douglas Ritschel wrote:
> >What are the advantages and disadvantages of
> getting
> >LTO Ultrium drives rather than SDLT drives?
> >
> >__________________________________________________
> >Do you Yahoo!?
> >Yahoo! Mail Plus - Powerful. Affordable. Sign up
> now.
> > http://mailplus.yahoo.com
> <http://mailplus.yahoo.com/>
> >_______________________________________________
> >Veritas-bu maillist  -
> Veritas-bu AT mailman.eng.auburn DOT edu
> >
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
> _______________________________________________
> Veritas-bu maillist  -
> Veritas-bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
> _______________________________________________
> Veritas-bu maillist  -
> Veritas-bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
>
>


__________________________________________________
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
http://mailplus.yahoo.com
_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu


_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu