Subject: RE: [linux-audio-user] Understanding HDD capabilities.
From: Jason (hormonex_AT_yankthechain.com)
Date: Tue Dec 04 2001 - 09:40:28 EET
I can easily imagine situations where one might want to record that many
sources.
Of course, if you're doing that, buying a few more disks and setting them
up in a RAID would presumably not be a problem financially.
The problem is that it's diffeicult to find out on the consumer end what
the sustained transfer capabilities of a disk are, and those are usually
much lower than the much more well publicised burst rates, which is what I
assume that 108MBits/s figure is.
On Tue, 4 Dec 2001 guenther.sohler_AT_newlogic.com wrote:
> You are wrong
>
> lets assuming you have 48 KHz Audio samples each 16 bit(2 Byte)
> so you have 96KB/s Data
> With an HD, which claims to be able to be able to transfer 108MBits/S
> (is 13.5 MB/s) (is 13824 KB/s).
> So you in principle record up to 144 Streams in parallel.
> Or if you use stereo data: 72.
> But do you have so many audio sources ????
>
> On 04-Dec-01 Patrick Shirkey wrote:
> > Just trying to grok how much I can technically expect from an HDD.
> >
> > I have a fair idea but could someone comfirm my understanding or
> > elaborate please.
> >
> > If I want to record a stream the bottleneck is the speed at which the
> > hdd can transfer the data from the ide cable onto a disc right?
> >
> > For example if I want a 16 bit, 48000 khz, mono file, that is 768
> > Kbit/sec.
> >
> > If my hdd specs tell me that the media transfer rate is
> >
> > Media Transfer Rate (Mbits/sec): 108.8-202.9
> >
> > How many of the above streams would I technically be able to capture?
> >
> > Would it be 0.1416 streams? ie not even 1 and a half streams?
> >
> > --
> > Patrick Shirkey - Boost Hardware Ltd.
> > http://www.boosthardware.com - For the discerning hardware connoisseur.
> > http://www.boosthardware.com/LAU/Linux_Audio_Users_Guide/
> > =======================================================================
>
> Guenther Sohler
>
> NewLogic Technologies AG
> Millennium Park 6
> A-6890 Lustenau
> Phone: +43-5577-62000-64
> E-Mail: guenther.sohler_AT_newlogic.com Fax: +43-5577-62000-88
>
-- YankTheChain.com - You can pretend we're not here. That's what I do.,
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