tom_k_d wrote: mjfe87 wrote: tom_k_d wrote:
no errors for 15min, not even at file boundaries. Wouldn't call that a save operation mode though, and indeed first errors popped up as 15min recording passed without a flaw... but with 16ch @96k there seems plenty of headroom.
Thanks Tom. Just to clarify, are you saying there were errors after 15min?
16 channels @96k: no drops for many hours on 5 different SanDisk Ultra Fit USB 3.1 Thumb Drives (3x 32GB, 2x 64GB), HD between 25% and 60%
16 channels @192k: obviously too much (HD average 90%), first errors after 15 min, however it crossed several file boundaries error free before - so file boundaries do not seem to be an issue with these, which is good to know!
Conclusion: I'd call up to 16 channels @96k a safe operation mode with the SanDisk Ultra Fit USB 3.1 Thumb Drives, but would not want to stretch it any further. The charming thing about these thumb drives is their form factor - for safe operation with highest sample rates / full channel count I'd go with an external Samsung SSD, but for tracking of some songwriting or small live perfomances, the SanDisk Ultra Fit USB 3.1 should do the job just fine. To note: Their predecessors (3.0) clearly didn't, so watch out what you buy...
Short update for all fellow DUREC recorders: I am just now benchmarking a 'Samsung USB 3.1 FIT Plus 64GB' thumb drive with my UFXII. The Samsung has better specs on paper (reads up to 200MB/sec, 30% more than the 'SanDisk Ultra Fit USB 3.1') and charges your budget 30% more than the 'SanDisk Ultra Fit USB 3.1', too... so my expectations were high - real life paints a slightly different picture though:
First, I had to format the Samsung with FAT32, as it comes from the factory with ExFAT preloaded. OsX disk utility did this job without issues (the command to do so is named 'Erase', but in fact what it does is re-formatting...)
As my expectations were high, I started with
16 channels @192k, which collapsed after a view seconds already on the 'Samsung USB 3.1 FIT Plus 64GB'.
Next I gave it a try at
16 channels @96k: HD load fluctuated between 30% and 65%, which is slightly higher and clearly more volatile (when watching the counter for a while) than on the 'SanDisk Ultra Fit USB 3.1'. Never the less recording is running error free for over one hour now on the Samsung, too, and it crossed it's now 7 file boundaries without issues (Error count 0)...
For DUREC recording I still highly recommend the 'SanDisk Ultra Fit USB 3.1' for up to 16 channels @96k.
It seems the 'Samsung USB 3.1 FIT Plus 64GB' would do this job, too, but with less headroom and at higher cost per GB...
Lessons learned: Paper specs is not enough to guarantee flawless DUREC recording.
By the way: Newer generation 'Intenso' 3.0 'micro line' sticks did not work at all (sloppy even at 4 channels @96kHz, some stop the whole recording at file boundaries), clearly avoid these for DUREC recording.