Corrupted images captured with EOS R5 Mark II and certain SanDisk SD cards
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Same experience. Took some time, but they came thru with 512 V90 replacement that has had not problems. Bonus for me;-)
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Which is weird, because the WD (which owns Sandisk) SSDs have been working really well for me. So the department putting WD SSDs in Sandisk enclosures is doing something extra that erases your data when you fill it over 50%
On the xmas holiday I was trying out a few different enclusures and SSDs to see which combination worked best and I determined that the WD sn850x has the best buffer, it uses about 30% of the drive for that. So moving a bunch of 8k60 clips or a gazillion 30 fps bursts from CFe to there won’t slow down after a while. The builtin SSD in my laptop has a ~20GiB buffer before it slows down. Other SSDs showed very similar behaviour, so writing is only fast for a relatively small amount of data.
The next time have a week off from work I want to see how my CFe cards handle huge writes, which is fairly academic since no Canon camera seems to be able to write faster than 600mbyte/s
And yes, the Samsung Pro labeled SSDs are very, very fast. And the ones I burned out lasted about 3x the listed endurance, so that should lessen any worries about longevity
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Well, I didn’t until you suggested it. But like you, I have no v60 cards. Only v90 and older UHS I cards.
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I had some early failures with Sandisk cards in the last 5/6 years (luckily not catastrophic; they just started to became unwritable by the camera, but could still be read by the card reader, so they were downloaded one last times as soon as they showed problems, and then phased out); I now use a mix of predominantly Transcend and some Lexar (and I have a Kingstone in my travel Panasonic LX100) and saw no more problems since then.
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It's really hard to get any sort of industry data. Failures with SSDs / flash chips can be due to firmware bugs or hardware specs (e.g. QLC is less durable), but unfortunately also due which fab actually produced the chips and what level of quality they're buying from the fab, and what level of quality control they do themselves.
And any of these three things can change even for the same model number. Unless stated explicitly there's no guarantees on what chips are inside.
E.g. Samsung Pro SSDs will not be QLC, and as Samsung has their own fabs they're usually made by themselves. But e.g. Intel also has fabs, but some of their earlier SSDs were made by themselves while others were not. Some even had firmware made by someone else (remember the SandForce debacle). SanDisk SSDs and SD cards may be manufactured in totally different places, I don't know.
With brands that don't make the chips themselves, you have to hope they do good quality control. It also doesn't help that "reviews" almost exclusively focus on speed, while reliability is an issue that pops up only later.
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Ohhhh that´s were that came from... I recently had two pics that were "corrupted and unuseable" according to Lightroom. I thought might something had happened during the download from the SD card (Lexar), but I guess it was the SD card. I put my raws on the CFexpress now. Just in case.
Maybe they meant you have to return the card with the package, but they don´t mind it torn open. Otoh, I never keep the packaging on small accessories either...
I got several external storage disc from SanDisk. I might wanna get rid of them.
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I suppose any device can have the occasional bad apple in the batch, so I don't know if my recent experience is a fluke or indicative of SanDisk issues. Someone asked about other camera brands and I use Nikon. I have had some older SanDisk 128GB v30 SD cards that I used for years in D850 and for a year and a half now in Z8 with no issues ever.
Just under two months ago I bought a SanDisk 256GB v30 SD card that worked fine at first. Yesterday after I transferred files on my computer card reader I put it in camera and it said unable to read card. The option to format card in camera was grayed out. I put it back in card reader and it worked fine so I reformatted it in the computer. When I put it back in camera it worked, but I after this (and reading comments here) I am afraid to use it.
May be time to try another brand of SD or bite the bullet and buy CF type B card and reader.
Just under two months ago I bought a SanDisk 256GB v30 SD card that worked fine at first. Yesterday after I transferred files on my computer card reader I put it in camera and it said unable to read card. The option to format card in camera was grayed out. I put it back in card reader and it worked fine so I reformatted it in the computer. When I put it back in camera it worked, but I after this (and reading comments here) I am afraid to use it.
May be time to try another brand of SD or bite the bullet and buy CF type B card and reader.
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Over the last few years I have had several SanDisk products go faulty. I would not recommend them to anyone.
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What I learnt from all this is:
- No brand is guaranteed 100% immune
- For what I consider to be important pictures, I'll be using exclusively twin card-slot cameras
Even though I've been using only Sandisk SD, CF and CF Express, zero failure. But it can always happen...
This means, for my planned trip to Asia, leaving the Leica M at home.
Consequence: Having to buy a second R5 II.
- No brand is guaranteed 100% immune
- For what I consider to be important pictures, I'll be using exclusively twin card-slot cameras
Even though I've been using only Sandisk SD, CF and CF Express, zero failure. But it can always happen...
This means, for my planned trip to Asia, leaving the Leica M at home.
Consequence: Having to buy a second R5 II.
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I use delkin power for my CfX cards and use PNY X-pro for my SDHC cards and have had good luck so far with both. I've found the black series to be just a little too pricey given the performance level of their non-black series is adequate for full-speed operations in my cameras. This last statement may change when I finally get to start back shooting with my R1, but so far they seem to handle it pretty well.
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I have never researched any proof for my use case, which is rather unusual for me, but my statement of reliability is from my own use, and is far from scientific. The reason I bought my first cards were they were on a pretty nice sale. Once I used them and they were reliable (for me) I simply bought more.
In case you were curious as to my reasoning.
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That's a very good reason!
I bought all my Sandisk cards for exactly the same reason, and experienced not one single failure in 12 years.
Yet, what I read about the Sandisk SSD convinced me to get some Samsungs as backups for the backups...
Anyway, my post didn't refer to your answer, but to JWest's original statement.
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Not sure about that. I had 2 128GB cards go faulty, 1 of them fell apart in my camera, I was very lucky not to have suffered damage to the camera. I also had 2 SSD drives intermittently lose connection with my Mac. I moved on to another manufacturer and have had no problems since.
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Unless you name the "common brands" that also have file corruption issues with SanDisk cards, it's only your opinion. Name the companies. I have an R5 Mark 1 and have been using SanDisk cards for years with no issues. Has anyone asked Canon on what's going on with their new models? Firmware?
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