Mixing SDHC Cards in HM700 ? at DVinfo.net

Ron Edwards · May 29th, 2009, 10:28 AM

Can anyone confirm it's ok to:

1.) mix two different brands of cards in the cam at the same time?

2.) mix 8 GB and 16 GB cards in the cam at the same time?

Thanks in Advance!
Ron

Jack Walker · May 29th, 2009, 05:02 PM

I don't know, but I will confirm that both are okay.

Before you discount my answer, ask yourself how times you have asked for directions, the person said, "I'm not sure," and then they gave you directions and you continued to listen.

Ron Edwards · May 29th, 2009, 09:18 PM

? ? ?

How could I "discount" such a response .... it (the answer) would first have to have value in order to eligible for any discount.
RonE

Jack Walker · May 29th, 2009, 10:33 PM

I have seen nothing to even suggest that the cards in the slots must match.

On the contrary, all you need is one card in either slot. While one card is recording you can change the card in the other slot. This strongly suggests the slots are independent of one another -- except when one switches to the other -- and the size of the card in the slot is unimportant. The brand of the card would also make no difference.

Eric Deyerler · May 30th, 2009, 01:12 AM

The SDHC-Class must be 6x (it allows a writespeed from min. 6 MB/s.), the brand or the size don`t make a problem.

Ron Edwards · May 30th, 2009, 06:56 AM

OK..thanks!
Ron

Sean Adair · May 30th, 2009, 09:02 AM

I can confirm that the camera moves seamlessly from a 16gb Delkin to a 32gb Transcend card without dropping a frame. Never had a doubt before trying either!

Marcello Mazzilli · May 31st, 2009, 11:15 AM

I confirm too as long as you use class 6 cards. Also.. I am using cards not listed among the "officially supported" ones in the manual with no problems at all. Still I have on doubt. The camera is supposed to be 35 Mbits but the cards are said to be 20... how can it work ?!?!?

Elvis Ripley · May 31st, 2009, 11:29 AM

Quote:

Originally Posted by Marcello Mazzilli

I confirm too as long as you use class 6 cards. Also.. I am using cards not listed among the "officially supported" ones in the manual with no problems at all. Still I have on doubt. The camera is supposed to be 35 Mbits but the cards are said to be 20... how can it work ?!?!?

That is the difference between Megabits and Megabytes. 35 Megabits per second is 4.375 Megabytes per second. So class 6 is guaranteed 6 Megabytes per second so you have a safe 1.625 Megabytes per second overhead.

Jack Walker · May 31st, 2009, 11:31 AM

Quote:

Originally Posted by Marcello Mazzilli

I confirm too as long as you use class 6 cards. Also.. I am using cards not listed among the "officially supported" ones in the manual with no problems at all. Still I have on doubt. The camera is supposed to be 35 Mbits but the cards are said to be 20... how can it work ?!?!?

A Class 6 card transfers a minimum of 6 MB/s -- which is Megabytes per second.

The video is written at 35 Mb/s -- which is 35 Megabits per second.

There are 8 bits to one byte. Consequently a minimum of 6 MB/s transfer rate is the same as 48 Mb/s transfer rate.

Note: Class 6 equates to a 40x card. Many Class 6 cards are actually much higher: 66x up to 300x. Obviously with video that has a fixed maximum write rate, the faster cards are not necessary, and a slower Class 6 card -- which would be cheaper than a faster Class 6 card -- would be fine if it is of dependable quality.

These two Wikipedia pages give details:
Secure Digital card - Wikipedia, the free encyclopedia
Data rate units - Wikipedia, the free encyclopedia

Marcello Mazzilli · June 5th, 2009, 05:18 AM

I know the megabytes / megabits issue... is just that on the box of teh card I read 20Mbits but I also read Class 6.. anyway.. it works!

May 29th, 2009, 10:28 AM	#1
Ron Edwards Regular Crew Join Date: May 2004 Location: Fairview Heights, Illinois Posts: 148	Mixing SDHC Cards in HM700 ? Can anyone confirm it's ok to: 1.) mix two different brands of cards in the cam at the same time? 2.) mix 8 GB and 16 GB cards in the cam at the same time? Thanks in Advance! Ron

May 30th, 2009, 09:02 AM	#7
Sean Adair Major Player Join Date: Dec 2006 Location: New York, NY Posts: 463	I can confirm that the camera moves seamlessly from a 16gb Delkin to a 32gb Transcend card without dropping a frame. Never had a doubt before trying either! __________________ Sean Adair - NYC - www.adairproductions.com JVC GY-HM-700 with 17x5 lens, MacPro 3.2ghz 8-core, 18gb. (JVC HD200 4 sale soon)

May 29th, 2009, 05:02 PM	#2
Jack Walker Trustee Join Date: Jun 2006 Location: Burbank Posts: 1,811	I don't know, but I will confirm that both are okay. Before you discount my answer, ask yourself how times you have asked for directions, the person said, "I'm not sure," and then they gave you directions and you continued to listen.

May 29th, 2009, 09:18 PM	#3
Ron Edwards Regular Crew Join Date: May 2004 Location: Fairview Heights, Illinois Posts: 148	? ? ? How could I "discount" such a response .... it (the answer) would first have to have value in order to eligible for any discount. RonE

May 29th, 2009, 10:33 PM	#4
Jack Walker Trustee Join Date: Jun 2006 Location: Burbank Posts: 1,811	I have seen nothing to even suggest that the cards in the slots must match. On the contrary, all you need is one card in either slot. While one card is recording you can change the card in the other slot. This strongly suggests the slots are independent of one another -- except when one switches to the other -- and the size of the card in the slot is unimportant. The brand of the card would also make no difference.

May 30th, 2009, 01:12 AM	#5
Eric Deyerler Regular Crew Join Date: May 2009 Location: Schwabach (Germany - Bavaria) Posts: 199	The SDHC-Class must be 6x (it allows a writespeed from min. 6 MB/s.), the brand or the size don`t make a problem.

May 30th, 2009, 06:56 AM	#6
Ron Edwards Regular Crew Join Date: May 2004 Location: Fairview Heights, Illinois Posts: 148	OK..thanks! Ron

May 31st, 2009, 11:15 AM	#8
Marcello Mazzilli Major Player Join Date: Apr 2009 Location: ITALIA Posts: 416	I confirm too as long as you use class 6 cards. Also.. I am using cards not listed among the "officially supported" ones in the manual with no problems at all. Still I have on doubt. The camera is supposed to be 35 Mbits but the cards are said to be 20... how can it work ?!?!?

June 5th, 2009, 05:18 AM	#11
Marcello Mazzilli Major Player Join Date: Apr 2009 Location: ITALIA Posts: 416	I know the megabytes / megabits issue... is just that on the box of teh card I read 20Mbits but I also read Class 6.. anyway.. it works!