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04-10-2013, 07:24 AM   #1
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645D: Corrupted files using SanDisk 95mbs ExtPro?

Wanting to maximize write speed from 645D to card. I bought Sandisk Extreme Pro 95mbs SDXC 64gig and 16gig cards. Shot and tested both card sizes; and got identical corrupted Raw files to both cards.

Would the 645D have a limit as to which SD cards it can use? Would a firmware fix solve it?

SanDisk 64GB SDXC Memory Card Extreme Pro Class SDSDXPA-064G-A75

Thanks.

04-10-2013, 07:29 AM   #2
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QuoteOriginally posted by Pentax645DTether Quote
Wanting to maximize write speed from 645D to card. I bought Sandisk Extreme Pro 95mbs SDXC 64gig and 16gig cards. Shot and tested both card sizes; and got identical corrupted Raw files to both cards.

Would the 645D have a limit as to which SD cards it can use? Would a firmware fix solve it?

SanDisk 64GB SDXC Memory Card Extreme Pro Class SDSDXPA-064G-A75

Thanks.
You should be using firmware v 1.13 or newer (the current version is 1.30) for reliable SDXC performance. You can get the firmware here:

Pentax 645D Firmware 1.30 Update - Pentax Camera News & Rumors - PentaxForums.com

However, just so you know, the card you bought far exceeds the 645D's maximum write speed, which is around 30mb/s.

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04-10-2013, 07:39 AM   #3
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QuoteOriginally posted by Adam Quote
You should be using firmware v 1.13 or newer (the current version is 1.30) for reliable SDXC performance. You can get the firmware here:

Pentax 645D Firmware 1.30 Update - Pentax Camera News & Rumors - PentaxForums.com

However, just so you know, the card you bought far exceeds the 645D's maximum write speed, which is around 30mb/s.
Thanks Adam, I just installed 1.30 last week. I will re test with these newer cards.
04-10-2013, 08:11 AM   #4
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UHS-1 transfer mode or higher is not suppotrted by the 645D Hardware.
-Linus-

04-10-2013, 12:02 PM   #5
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QuoteOriginally posted by -Linus- Quote
UHS-1 transfer mode or higher is not suppotrted by the 645D Hardware.
-Linus-
But that does not matter, UHS-1 is by design backwards compatible.
UHS-2 only work in UHS bus support device.
06-10-2013, 06:00 PM   #6
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Same issue

Just trying to revive this thread...just had the same issue where my Sandisk Extreme 64gb SDXC card errored out after 4 or 5 shots. Really scary for a professional to see this (see attached)

I haven't had the same issues yet with the Lexar. Is it an issue of the speed being too fast, or the Sandisk being incompatible? It shot about 5 shots fine...
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