On Fri, 19 Mar 2010, Ed Wilts wrote:

> On Fri, Mar 19, 2010 at 2:04 PM, Justin Piszcz <jpiszcz AT lucidpixels DOT 
> com>wrote:
>
>> While this is cool, I am still waiting for the announcement and pricing on
>> the IBM/Fujitsu(?) 35TB/tape technology.
>>
>
> Unless you never plan on taking your tapes out of the library or have some
> VERY fast hardware, 35TB/tape doesn't do much except send a lot of empty
> tape off-site.
>
> 35TB is 35,000,000 MB.  At 100MB/sec, that 350,000 seconds or a bit over 97
> hours. In other words, you'd be writing for 4 straight days averaging
> 100MB/sec to fill a tape.  Assuming you only write to a tape during a
> 12-hour backup window, 7/8 of your tape will be unused.
>
> I'm personally waiting for an environment here where I can sustain writing
> to all of my tape drives at 100MB/sec.  I can't drive all of my LTO-3 drives
> at full speed.  Having drives that demand a lot more than that just
> contributes to a lot more stop/start.
Hi,

I currently have the 100MiB/s++ (see 500-600MiB/s peaks) already with 10GbE
and multiple LTO-3 drives connected for several years now.  I am definitely 
looking towards the 35TB tapes, I wonder how fast you will be able to push 
data to them and what their cost will be.

For smaller environments, they regularly achieve 100MiB/s (LTO-4) with single
gigabit nics without any issue.  What speeds do you see?

Justin.
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