The theoretical write speed is 360 MB/s??? at maximium compression,
however in the real world mileage will vary.??? That also depends on
being able to keep data streaming out to the device.??? Block size
can also impact the throughput.
Paul.
On 2017-11-01 6:42 PM, Tony Goodhew
tony_goodhew@... [hp_agilent_equipment] wrote:
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???
Hey Dave,
???
How long does it take to push 1TB to
these LTO devices? I was just starting to look at them
last weekend but I couldn???t find anything definitive ???
It seemed that people were saying !500GB an hour.
???
Any insights?
???
Thanks,
TonyG
???
Sent from for Windows 10
???
???
On 11/01/2017 04:56 PM, Dave Daniel kc0wjn@...
[hp_agilent_equipment] wrote:
> You can also look at DLT tape drives. I haven't
worked on
> non-IBM-mainframe tape for many years, so I
haven't kept track of either
> DLT or LTO. I believe LTO is in it's 8th
generation now. I believe,
> though, that LTO has surpassed DLT in terms of
capacity and performance,
> probably also in terms of reliability.
>
> Maybe someone out there has more current
knowledge.
LTO-8 was just announced; I don't know if it's
shipping yet. Those
are hugely capacious tapes.
DLT topped out at 40/80GB, then gave way to SDLT. SDLT
topped out at
300/600GB. There were a few variants like the DLT-S4
(800GB) and the VS
series (80/160GB), but I never saw many of those
around.
For cost-sensitive home archival use, SDLT-II media in
an SDLT-600
drive (300GB native/~600GB compressed) is probably the
sweet spot. LTO
media is still pretty expensive in any volume.
Many organizations have a "use once" policy for tapes,
and modern
tapes are quite robust. Lots of people take them home
from work and
liquidate them in batches on eBay. They've typically
been used once,
and are barely broken in. They are usually pretty
trustworthy.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
