Double-Slot Recording

[Tim Bakland]

After having my first slight card glitch (small, but scary), I installed the XF300 firmware update.

Just wondering: how at ease should one feel with double-slot recording?

Two worries:

1. If one card fails, will that trick out the whole system and cause the other card to fail (in this case, there's really no improvement, since two failed cards isn't better than 1.

2. Is double-slot recording somehow putting more strain on the camera's processing? I'm amazed it can even do this, but is it risky?

[Larry Becker]

Hi Tim,

Just have to ask the question... why would you wait for a card glitch to install the firmware upgrade? I've been a Canon user for a LONG TIME, and their firmware upgrades are really pretty reliable... I can see waiting a day or so to see if there are any problems popping up, but upgrading really should be a priority.

What cards are you using? Are they on Canon's approved list for the camera for "works in all modes"? I would say that to use anything else puts your footage at risk. I have been shooting Canon still cameras for a long time (1DII, 1DIII, 5DII also video), and following Canon's recommendations, I have NEVER HAD A CARD GLITCH. EVER (OOPS - shouldn't have said that!!!!). I also always use name branded cards - almost always Sandisk, but one Lexar UDMA card for the 5DII shooting video. NEVER had a card glitch. Knock on wood (bangs on head). Also, I ALWAYS format/initialize cards after I upload (and check)the footage to a computer from a camera (still or video). Always. Never had an issue. Check the files on the computer to make sure you have uploaded everything, of course...

The double-slot recording sounds like a wise thing to do in a situation where 1) you have lots of cards, 2) you are in a do or die situation and HAVE to get the footage, and 3) normally wear both a belt and suspenders (sorry). If I were in a production shooting situation and it was the only camera, OR if I actually needed two copies of the footage for a client or for editing. I might shoot two cards at a time until I got to know/trust the camera... Also, you'd want to check the video regularly to see if there's a problem (could happen!).

I'm still getting to know this camera (also an XF300) and it is really an amazing beast. I've shot hundreds and hundreds of clips - no burps at all - but some USER error a few times, though, and shooting on two cards at a time would just mean I had two copies of my mistakes!

If one card fails, and it could happen, the other card continues the recording stream. Here's another thread on this issue: http://www.dvinfo.net/forum/canon-xf...ding-mode.html

Larry

[Tim Bakland]

Larry --

I didn't give all the background. The card glitch (Sandisk Extreme Pro -- one of Canon's recommendations) was a freeze-on-import at a certain point late in the card and it actually occurred after being in the XF100. Who knows what triggered it... I will try the card again by initializing it and recording an empty room up and past the point (47 minutes) where the error on import occurred.

I had already made the upgrade with the XF300 firmware, but this little near-accident with the XF100 just reenforced the good in doing that.

But this thread was more a question of the smartness of actually doing the double-slot recording. Believe me: I would only use the best cards. And yes, like you, the XF300 has been an amazing boon for me.

Thanks for the response -- very helpful.

[Pete Bauer]

The dual slot recording is nice to have. See also:
http://www.dvinfo.net/forum/canon-xf...ding-mode.html

[Larry Becker]

Originally Posted by Tim Bakland

Larry --

I didn't give all the background. The card glitch (Sandisk Extreme Pro -- one of Canon's recommendations) was a freeze-on-import at a certain point late in the card and it actually occurred after being in the XF100. Who knows what triggered it... I will try the card again by initializing it and recording an empty room up and past the point (47 minutes) where the error on import occurred.

I had already made the upgrade with the XF300 firmware, but this little near-accident with the XF100 just reenforced the good in doing that.

But this thread was more a question of the smartness of actually doing the double-slot recording. Believe me: I would only use the best cards. And yes, like you, the XF300 has been an amazing boon for me.

Thanks for the response -- very helpful.

The Extreme Pro is certainly the appropriate card. I use the Extreme model and they work well, too. It's possible you have a defective card. If I were you, I would certainly be warry now and go into "belt and suspenders" mode for a while.

I can't imagine having to always use double-slot recording, but in some high dollar/risk situations it's probably a wise thing. If you have enough cards, it might be a good idea, but kind of a pain! If the camera/media can't be trusted to work properly, there's a bigger problem here.

I haven't felt compelled to use the dual-slot recording feature. Any one else use it yet?

I was looking at your web site - NICE STUFF!!!!!

Larry

[Tim Bakland]

Thanks for the nice words, Larry.

Belt and suspenders mode, no question (why not, right?).

Again, to be clear, this happened on the little brother camera, the XF100, and it could very well be the card, or a flukey thing. Still no problems otherwise and both cameras have given amazing results.

[Tim Bakland]

Bought a couple more cards. Why not, right?

Can't tell you how nice it feels to have the XFs both double-slotting now.

[Graham Bernard]

So, can we say that DoubleDecking is akin to needing a Nano to ausage my paranoia?

Grazie

[Robin Davies-Rollinson]

Yes, I'd say so.
It's not likely (within Classical physics!) that both cards are going to fail at the same time, so you've probably just saved yourself a lot of money that you can now spend on other goodies!