- Posts: 5
- Joined: Sat Nov 06, 2021 5:58 pm
- Real Name: Nathan Jackson
It can either be an issue with your SSD, or possibly your RAM.
I've actually had both issues recently (on different systems). One one, my internal 2TB SSD started failing and when computing checksums ( sha256 ) of the BRAW off the original media (that I thankfully still had), they didn't match the one computed from my internal SSD. I ran a full SMART Self-Check on the SSD and it indeed failed, reporting read-errors and some re-allocated sectors. Replaced the SSD on that machine and no more issues.
On another system, the corruption wasn't from the SSD itself but was happening during the copy process itself and got traced to flaky ram. System was otherwise working fine, but when doing a memory stresstest (memtest86), it showed a few defective locations in the RAM and when copying 100 GB of footage, some of it ended up on those location and was getting corrupted. Replaced the RAM sticks and never had issue again.
In general now what I do is :
(1) Compute a chekcsum (sha256) of the original file on one system.
(2) On another computer (or just doing a unplug/replug to avoid caching), I copy the file to my internal drive.
(3) I then compute the checksum reading the file from my internal drive and validate that they match.
(4) I also keep a text file with all the footage checksums next to them so I can always revalidate they didn't end up corrupted somehow later on.