200 gig hard drive vs. dividing hard imac drive

[sb]

Real world firewire 400 is 27MB to 35MB/sec., maybe 37MB/sec.

Way plenty for DV capture at 3.6MB/sec.

sb

On 1/16/03 11:19 AM, "Thubten Kunga" <Kunga at FutureMedia.org> wrote:

> FireWire is 50 MBytes/sec (400 bits dIvided by 8 bits per byte) while
> FireWire 800 is 100 MBytes/sec (800 bits dIvided by 8 bits per byte)
> sustained throughput. This is analogous to the old ATA66 vs. the newer
> ATA100 IDE spec. I think that we will be needing FireWire 800 to
> transfer HDDV from our High Definition DV cameras and desks that will
> be coming to market later this year.  http://www.supervideo.com/jvc.htm
> 
> Anyone on the list have any experience with High Definition DV yet?
> 
> k
> 
> On Thursday, January 16, 2003, at 11:08  AM, Michael Winter wrote:
> 
>> On Tuesday, January 14, 2003, at 11:57  AM, XXL wrote:
>> 
>>>> The bandwidth for firewire 400 is so much greater than you need for
>>>> dv
>>>> capture that there is enough room to pass the video thru the
>>>> harddrive into
>>>> the computer and then record it onto the drive.
>>> 
>>> According to Maxtor engineers, FireWire 400 is the limiting factor in
>>> performance in many drives now.  It is claimed that newer drives are
>>> faster
>>> than the bus. ..just what I read.. Have no idea if it is actually
>>> true.
>> 
>> From the research I've done speccing drives, you're information is
>> correct, at least with respect to sustained transfers.
>> 
>> However what the previous poster was referring to is that a real time
>> video stream has a fixed bandwidth that is much lower than the 400
>> Mbps that Firewire provides. So it doesn't matter how fast Firewire or
>> the drives are, as long as they are faster than the DV stream(s)
>> (which they are -thanks sb).
>> 
>> -Mike