@woody123
Thanks, just ordered sandisk extreme sdhc

I think I understand this Bandwith when it goes up and down. Its based on the detail the camera needs to record, more objects and good light means more date bandwith. Less detail like landscapes and distance objects not in focus- less bandwith.

>Great deal on the 30MB/s Sandisks at B&H right now - $58.95 for a 32GB when you order 2 or more.

Do you have a link?

I have 2x Sandist Extreme 32Gb, but I think it had been slightly more in price.

Great deal on the 30MB/s Sandisks at B&H right now - $58.95 for a 32GB when you order 2 or more.

This should put everybodys mind at ease with regards to the Driftwoods 132 Patch. It seems this is the card for high 132MB's Broadcastable video:

http://www.legitreviews.com/article/1172/2/

its maxium bandwidth is 21.33 MB's - Havasusvideo as clearly told me that you need 16.5MB/sec so finally you should have no writing limitations. Plus a bit of bandwidth to push the bitrate a bit further. I waiting to get the card this week.

@havasuvideo - Thanks for the reply. That makes sens and just need to confirm. It odd really since I have a card that is 200x Class 10, Dane-Elec Proline 32GB.

Optimized for Rapid-Fire Photo and Video
Perfect for the Newest Digital HD Video recorders and SLR Cameras
Finest SLC Memory and Controllers for Years of Reliable Use in the Most Demanding Conditions
Class 10 Rating Guarantees Minimum Write Speeds of 10MB/Sec or Higher
200x Allows Read Speeds up to 30MB/s

I think the advertising spec is a bit miss leading. So it really something like min 10MB/sec so prob that sandisk extream 3 @ 30 MB/s sec will do.

@anyone. Can some please advise a good fast memory card for Driftwoods patchs - 132 MB's

SanDisk ships Extreme Pro SDHC UHS-I memory card seems to be a good one but is the Panasonic GH2 actually takeing advantage of the UHS-1 Controller?. Is 45 MB's enough for a Driftoods patch.

I dont want to spend £82 on a 32GB memory card and find its not fast enough as I get "recording stopped due to the limitations of the writing to the memory card"

@tonalt

It's my understanding that the SanDisk 30MB/s Cards labeled "HD Video" AND
"Class 10 and UHS-1", like the ones in the thread's first post are just fine.

They are the most common SanDisk 30MB/s available now.

USB 2.0's speed limit I believe is 480 Mbit/s or 60 MB/s so yeah,... the actual readers have a speed limit below that then. Do I understand this correctly?

"we've seen a USB 2.0 hard drive has sustained 36 to 40MBbyte/s in the absolute best scenario' :-)

Normally it is SDHC reader speed limit.
Most USB 2,0 devices are quite slow and cheap.

@LPowell

It is not the question of computer power.
You need good SDHC reader, USB 3.0 based usually.

@woody123 "The first post lists an Extreme UHS-1 30MB/s Card as compatible.
So it may not be just UHS-1 that makes them incompatible?
What has your research shown?"

I didn't mean to allude that ALL UHS-1 cards wouldn't work, just that the UHS-1 technology in the cards can't be utilized in the GH2. That means it'll rely on older technology that is still built into the cards as a redundancy. From what I've read is that there should really be 2 benchmarks for each UHS-1 card, one for electronics that utilize the UHS-1 tech, and one for electronics that don't. It seems the the main cards in question is the 16GB and 32GB Extreme Pro 45MB/s, which you have already noted. The card I am using with no problems what so ever is the older 32GB Extreme 30MB/s Class10 (the second one in your first list above).