64gb Memory Card in the M10?

[pico]

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20 hours ago, 01af said:

Any new card must be tested for reliability. There are open-source applications somewhere on the Internet which can do exactly that automatically.

Can you point us to some of these? In my modest experience such applications can take hours to run through one 64mb card. I would not even try a larger one.

 

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[andyturk]

4 hours ago, pico said:

Can you point us to some of these? In my modest experience such applications can take hours to run through one 64mb card. I would not even try a larger one.

I'd think that actual brand name cards would have been tested at the factory and have bad blocks mapped out. These cards almost certainly do write verification when new information is put on the card and if a bad block is detected, they silently and automatically use another part of the storage array. This is invisible to the application putting data onto the card. "Fake" cards may have entirely different behavior and should be avoided. Lots of good info here on Bunnie Huang's blog.

The exhaustive card testing would probably be more useful on older cards that have been in service for a while. On those, there could be too many non-functional blocks to map out correctly, resulting in data loss. The other interesting test is whether information written (and verified) a year ago is still intact today. I've got some old 2GB cards that did exhibit "bit rot" over the years. I know the cards failed because I actually transferred the images (DNG files) off the card shortly after using the camera, but ended up leaving the cards un-erased in a drawer for years. When I opened up the files years after they were written, some of the photos (still on the cards) had obvious problems that didn't exist in my Lightroom archive.

Most of my cheap 2GB cards were either Kingston or "A Data" brand.

Edited April 28, 2019 by andyturk

[KFo]

So many approaches to this issue.

Personally, I like to spread my risk across multiple cards that are already used and haven’t had any issues.  On a trip I’ll have 8 32gb SD cards.

If I have any issue whatsoever with a card I dispose of it .  They are cheap enough.

Recently I’ve started moving to 128 gb cards with high speed write capabilities for video.  The Leica hasn’t complained about them yet either.

[a.noctilux]

We are talking about M10 that for me there is none video record 😉.

But everyone has different kind of using their gear, so SD capacity is different for each of us.

[rnl]

On 4/27/2019 at 10:02 AM, lucerne said:

Despite the fact that the M10 will use much bigger cards than 64gb, it is a good decision to carry a few high speed cards of this capacity.  It’s better to lose the content of one small (64gb) card on a trip, than to lose everything on a mega-card. 

The transfer rate from card to computer is also relevant.

Enjoy your M10, and ignore any rare and difficult to substantiate rumours from non-leica users.     

The Leica specification for this model should  be your point of reference.

+1. Attention should be paid to the transfer rate. Storing, and downloading from cards is partially a function of the cards quality and rate of transfer. Frankly I would prefer 32 gig cards of high-quality rather than 512 gig cards of low-qualityAttention should be paid to the transfer rate. Storing and downloading from cards is partially a function of the cards quality and rate of transfer. Frankly I would prefer 32 gig cards of high-quality rather than 512 gig cards of low-quality

Edited May 1, 2019 by rnl

[LBJ2]

According to DPR "The Leica M10 supports SDHC/SDXC cards from 1GB up to 512 GB" https://www.dpreview.com/news/0824558967/leica-m10-firmware-update-adds-support-for-more-sd-cards

Thanks to a couple M10 firmware updates ago, the M10 is now compatible with several SD card brands. I've always had good success with SanDisk so I use UHS-I SanDisk Extreme PRO 64GB SDXC cards (Reads Up To 95 MB/s/ Writes Up To 90 MB/s) 

The M10 is not capable of UHS-II card speeds, so no need to spend extra for UHS-II SD Cards.

Edited May 3, 2019 by LBJ2

[jaapv]

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UHS II is quite useful if you are using an USB3 card reader.