I'm getting some studdery video trying to play back 4k Red files from a 5 1/2" floppy disk. WTF?
--- In Avid-L2@yahoogroups.com, David Ross <speckydave@...> wrote:
>
> I totally agree.
> Though the original poster was asking for opinion on a 3.5" desktop
> drive, it's cheap and non-raid, so its performance is probably little
> better than the cheapo 2.5" drives you're talking about and 40MB/s is
> going to be about the best you can expect over FW800. A quick test of
> a similar domestic Western Digital drive I have here confirms this.
> The same files copied onto the same drive from the same source over
> USB 2 gets me a transfer rate of 27MB/s.
>
> So hey; FW800 sucks less in my book.
>
> D.
>
>
> On 12 May 2011 21:56, Rupert Watson <rupert@...> wrote:
> >
> >
> >
> > I have never seen a single 2.5" drive of the kind you get in cheapo
> > little portable enclosures get above 40MB/s on ANY connection. Be it
> > USB, 400 or 800 M/bit firewire. They are all a sack when it comes to
> > transfer rates but a million cheap arsed producers can't be wrong!
> >
> > Rupert Watson
> > +44 7787 554 801
> > www.root6.com
> >
> > -----Original Message-----
> > From: Avid-L2@yahoogroups.com [mailto:Avid-L2@yahoogroups.com] On Behalf
> > Of David Ross
> > Sent: 12 May 2011 17:35
> >
> > To: Avid-L2@yahoogroups.com
> > Subject: Re: [Avid-L2] External Drive for media w/ MacBook Pro
> >
> > Then why do I get about twice the transfer rates from the same drive
> > when I use FW800, compared to USB? Same drive, same computer, same
> > files, different cables. The drive is absolutely NOT slower than the
> > connection.
> >
> > 480 Mb/s is "top speed" for USB 2, the sustained transfer rate you get
> > will depend on the state of the drive (i.e. how full/fragmented it is)
> > and what you are copying (i.e. lots of little files or one big file.)
> > 190 Mb/s does not surprise me at all. FW400 theoretically has slower
> > speed (400 Mb/s vs USB's 480 Mb/s), but, because it's designed for
> > sustained transfers, will actually give better speed when you're moving
> > large amounts of data around (i.e. it's better for editing.)
> >
> > Further reading:
> > http://en.wikipedia.org/wiki/Usb#USB_2.0
> > http://en.wikipedia.org/wiki/Sata#Revisions
> >
> > D.
> >
> > On 12 May 2011 17:09, bouke <bouke@...> wrote:
> >
> > >
> > >
> > > David,
> > > Explain me this:
> > > I'm doing a copy of 500 gig right now to a similar drive over USB.
> > > I see transfer rates of about 190 Mb/s.
> > > And that is 'real world' (if there is a reality in my studio, still
> > > not
> > > sure)
> > > Now if USB is capable of 480 Mb/s, why am i running less than half the
> >
> > > speed?
> > >
> > > I can answer that, simply cause the drive is slower than the
> > connection.
> > >
> > > Now i am the first to admit that using a 99 USD drive is not the way
> > to go.
> > > (My 6 TB storage set me back 8000 USD, but i have shared storage and
> > > Raid
> > > protected)
> > >
> > > But again, the physical drive itself is the bottleneck, not the
> > connection.
> > > No matter if you put a SATA_16 2040 UltraWide Fast 256 bits
> > > "thunderbold widowmaker" connector on it.
> > >
> > > But it can also be my building is on old Indian burial grounds, hence
> > > i don't get higher speeds than 25 MB / sec on any single drive.
> > > (again, that is real world here, not specs...)
> > >
> > > Bouke (Who has to change a few lightbulbs now)
> > >
> > >
> > > VideoToolShed
> > > van Oldenbarneveltstraat 33
> > > 6512 AS NIJMEGEN
> > > The Netherlands
> > > +31 24 3553311
> > > www.videotoolshed.com
> > > For large files:
> > > http://dropbox.yousendit.com/BoukeVahl998172
> > >
> > > ----- Original Message -----
> > > From: "David Ross" <speckydave@...>
> > > To: <Avid-L2@yahoogroups.com>
> > > Sent: Thursday, May 12, 2011 5:40 PM
> > > Subject: Re: [Avid-L2] External Drive for media w/ MacBook Pro
> > >
> > > > Bouke,
> > > > Maybe I'm missing your point, but I I don't see how you can say that
> >
> > > > USB is faster than the drive can perform.
> > > >
> > > > This drive is USB 2, which has a top transfer speed of 480 Mb/s.
> > > > Even if the drive here is only an old revison 1 SATA, that's still
> > > > 1.5 Gb/s, which is more than three times faster. More likely that
> > > > it's a revision 3 SATA, which would give it 6 Gb/s, even faster than
> >
> > > > USB 3 (which is an option for this drive if you buy the adapter,
> > > > though won't be supported on a MBP.)
> > > >
> > > > Personally, I would always try to avoid USB for editing from, though
> >
> > > > it's probably fine for simple low-res edits. For this kind of
> > > > budget, you'd be much better off with a Firewire 800 drive, which
> > > > would give about twice the transfer speed for very little extra
> > money.
> > > >
> > > > D.
> > > >
> > > >
> > > > On 12 May 2011 14:42, bouke <bouke@...> wrote:
> > > >>
> > > >>
> > > >
> > > >> even if it is USB, USB is faster than the drive can perform.
> > > >
> > >
> > >
> > >
> >
>
If you want to donate to Red Cross quake relief, you can do so through your cell phone. Text redcross to 90999 to make a $10 donation. It will be on your next cell bill.
No comments:
Post a Comment