Robert Niessner wrote:anandtech.com/show/8216/samsung-ssd-850-pro-128gb-256gb-1tb-review-enter-the-3d-era/7
"The first set of graphs shows the performance data over the entire 2000 second test period. In these charts you'll notice an early period of very high performance followed by a sharp dropoff. What you're seeing in that case is the drive allocating new blocks from its spare area, then eventually using up all free blocks and having to perform a read-modify-write for all subsequent writes (write amplification goes up, performance goes down)."
anandtech.com/show/6433/intel-ssd-dc-s3700-200gb-review/3]Source
Austrian company Angelbird has dedicated AV SSDs for continuous recording. Those SSDs make use of larger over-provisioning. This means that you have less free capacity and more hidden space dedicated to improving the write performance.
angelbird.com/category/av-modules-79/
All modules are certified by Blackmagic.
You could try to use Samsungs Magician Tool for increasing over-provisioning and test if this helps with dropped frames.
Hi Robert,
I know sequential writes does not effected by over provisioning. And after formatting the media in the camera, the data is being written sequentially, right? Any way, I'll try to test over provisioning further.
After reading your link and (luts) more, I found that deep/ secure format the drives
maybe solves the dropped frames problem, I formated 2 SSD's and succeeded to capture 4.6K RAW 60fps using two SSD's simultaneously!
It introduces two new problems: 1) It takes hours to secure format SSD's (I use several of them every day), and 2) It shortening significantly the SSD life span.
I guess Cfast cards should work the same, have any of you Cfast users encountering similar problems when recording in high bandwidth video like RAW/ or Prores 444 in slow motion?
Please, can someone from Blackmagic share his
profesionale input about that?
Posted: Wed Aug 09, 2017 3:08 pm