Re: [Veritas-bu] STK T10000 tape drive
2007-09-13 11:12:52
I agree, in my environment I have not seen anything that can saturate a 2GB FC link. I am thinking that choosing a drive with more speeds will give improved "real-world" performance rather than a drive that can peak very high. (although peaks of 180 MB/s would blow my socks off :) )
On 9/13/07, Gregory Demilde <gdemilde AT gmail DOT com> wrote:
The biggest problem is to have an architecture that can feed that transfer rate .. because at those speed, one drive just saturates a 2 Gb FC link. ;op
On 9/13/07, Justin Piszcz <
jpiszcz AT lucidpixels DOT com> wrote: > > > On Thu, 13 Sep 2007, Gregory Demilde wrote: > > > Native drive speed of the T10K is 120 MB/s ... it is even closer to > > 130 MB/s..; so If you are using compression and you feed the data fast
> > enough you can go over the 170 MB/s.. I had peaks over the 180 MB/s > > > > > > > > On 9/13/07, Justin Piszcz <jpiszcz AT lucidpixels DOT com
> wrote: > >> > >> > >> On Thu, 13 Sep 2007, Schaefer, Harry wrote: > >> > >>> FWIW, I have done write tests with ours and based on output from iostat
> >>> -xtc, the write speeds were between 100-105 mb/sec... > >>> > >>> Harry > >> > >> But that is just the read speed of the hard drives yeah? If the data
> >> stream is compressed 2:1 the tape only writes then at 50-52.5 MiB/s. > >> > >> I recall watching catalog backups write to tape and I would see the disk > >> reading at 100-120 MiB/s, was the LTO-2 tape that is was backing the
> >> catalog up to writing that fast? No, compression was being used. > >> > >> Justin. > >> > >> _______________________________________________ > >> Veritas-bu maillist -
Veritas-bu AT mailman.eng.auburn DOT edu > >> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> >> > > > > > > -- > > Gregory DEMILDE > > Email : gdemilde AT gmail DOT com > > GSM : +352 691 915620 > >
> > I was referring to LTO-X but nice info! > > Justin. >
-- Gregory DEMILDE Email : gdemilde AT gmail DOT com GSM : +352 691 915620 _______________________________________________
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