Having Freefilesync open slows down disk access to a crawl

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Posts: 9
Joined: 16 Jul 2023

eskimo68

Was copying around 50-G or so from one disk to another with explorer and speeds were ~2M/s instead of 100x. Tried starting another copy but same problem, awful speed. Usually avoid copying two things from the same disk at once.
Had Freefilesync open (not running anything) preparing for some more copying once these initial ones were done.
Eventually started killing vmwares and finally freefilesync to figure out what was going on.
Once I shut down freefilesync (which had nothing running, just *waiting* for me to press synchronize), everything speeds up to normal. Huh? I can understand having some background process monitoring disks for new content but it's apparently very blocking or inefficent.

Haven't updated FFS in the last year (just mentioning this as I was so baffled). Couldn't find any posts about this and this is probably some setting I should be aware of.
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Joined: 11 Jun 2019

xCSxXenon

FFS has nothing to do with it, not directly at least. Is it working fine now?
Posts: 9
Joined: 16 Jul 2023

eskimo68

If FFS is not on, copying works normally. So I'm guessing (not in front of that PC now) that it's Volume Shadow Copy or something similar that is active even if FFS isn't doing anything. Just having a set opened which has the same disks/directories makes it slow down to a crawl. I could understand updating at the end of every 2G file but apparently each write is "recorded/noticed" and that causes the slow speed.
Not a biggie, just curious here.
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Joined: 8 May 2006

therube

Kind of reminds me of, posting.php?mode=quote&p=42288.

VSS only comes into play if you have specifically set it, & also requires that FFS is running "as Admin". So if you did not do that, that shouldn't be affecting things.
Posts: 9
Joined: 16 Jul 2023

eskimo68

(njaa, probably not related enough)

Running FFS as admininstrator as otherwise something didn't work. I have failsafe copy on but neither of the other copy options.

Huh, you cannot add pics and too lazy to do an imgurl. Anyway, just opening FFS, adding a directory (and probably did a compare but didn't start a synchronize as I had the copying going on).
It might be I started FFS to use my time more efficiently as the copying would have taken over 10 mins (instead of 2-5 mins). So there might have been a base problem.

Cannot duplicate the same problem now. Might have to be from a certain disk towards a certain disk even though I tried both ways in the directories FFS would have worked in right now.

But even if (uncertain) I had some base problem, it's weird closing FFS restored the speed to max. And I was probably just letting explorer copy for at least half an hour before starting to close programs.

Still, I've had it with Acronis (ever since they sold the perpetual license and then gave up on that license shortly afterwards, good business decision that, losing customers that have been upgrading, i.e. paying, every few years for 20+ years :D ). So FFS is the best choice for me. Hence, I donate at times and hope the parallel processing some day would improve (lots of small files and/or different disks is less than stellar performance-wise, don't remember which).
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Posts: 4880
Joined: 11 Jun 2019

xCSxXenon

This isn't surprising. As I alluded to, FFS wasn't the direct issue. It's not crazy that the OS does something funky, or AV software, or a thousand other things that can do something weird that affects two seemingly unrelated components. Could be one of those rare bit-flips. Patch Tuesday just came out, and I have years of experiencing issues on client devices that only had issues when a pending restart was present. Could be coincidence or maybe they needed a weekly restart anyway ¯\_(ツ)_/¯
I just had to reformat one of my external SSDs. Basically brand new, NTFS, BitLocker encrypted, just unusable out of nowhere. Tried different USB ports and cables, since those are much more likely than anything else. Nothing worked. And transferring pegged it at 100% active time in task Manager but speeds were <2MB/s, and it should be 300+. Cancelling a transfer locked up explorer.exe also, but the drive wasn't failing according to SMART. Since it's just an archive location, I did a reformat, re-encrypted, and it went back to 300-400 MB/s. Didn't even have to reconnect anything. Something in Windows had it wound up backwards. Computers be weird, but multiple backups alleviate that sometimes lol