i really think something wrong with my unraid when copying files to a ssd cache drive.. ive asked before but never really get diffintive answer always its probably small files

well right now i trying to copy 150gb of 77 files ranging 1 2 gb files to like 5gib files.. i only can transfer like 2 3mb or under a mb telling me in krusader its going to take 2 days to move files... there is definity something wrong i even did a reboot... is there a test can be done.. its just ridiculus i cant be copying at 500mbs instead im at less then 1mbs

both are Blue SSD WD at 6gb connection... i even shut off all VMS. dockers, and it still wont go faster.

so i copying from my Unassigned Drive 1TB drive to the CAche drive.. its also slow if i copy it through windows SMB share

there has to be something i can do to fix it... its slower the a spinning hard drive and i copying it to my Temp folder on my array which is cache drive first

so i frustrated

tardis-diagnostics-20250714-1932.zip

What is the speed you get when copying the same data directly to the array?

test is copying 4 files of 34.9gb combined smallest file 1.8gb 4.7gb 7.7gb biggest 20.7gb

so copying from

array to unassigned drive SSD it was copying like 90-140mib/s average 130-135mib/s

array to cache drive SSD it was copying at 140-220mib/s average 180-190mib/s but drops down to 50-60mib for a bit then back up then drops down to 30mib

unassigned drive to array (avoiding a cache) started at 300mibs then dropped then dropped to 5mibs then goes up to 300mib then to like 50 and up to 340mibs t9hen averaging around 50 then drops to 25ish then back up to 340 then down to 30 then back up to 300 ish jumps to 394mibs and then drops to like 20 and then 4mib then jumps up etc

test

unassigned to temp folder on array with cache drive first... copying started at 300 then dropped to 25-35mib average is 30mib drops down to 5 -18 but then jump back to roughly 30mib drops down to 1-5mib/s then jumps back up to 25-30mib/s average then drops to average of 12-16mib/s

cache to the unnassigned drive 30-150mib/s averaging 150mib/s to 130-147mib./s on 20.7gb file

array to cache drive average 18mib/s then drops to average 4 copying the 20.7gb file average out at like 20-30mibs/

i used krusader as it was easier to do

if i need to do like 1 big file and do the tests over again i can i didnt bother doing all the files i was doing as i didnt wanna be stuck for days... but it feels like i copying over a usb flash drive and not a sata connection i dunno just seems i getting piss poor speeds

Considering the results, it does look like a slow device.

which one would be the cultuprate or is it something unraid doing it.. are there other tests i can do.. to narrow things down etc

16 minutes ago, comet424 said:

which one would be the cultuprate

The SSD, since it's the one that is underperforming considerably.

which one the cache or the unassigned drive one.. they both the same 1 tb wd blue

so i ran diskspeed app on the UD for the 500mb/s i getting nearly 5000mb/s test it says didnt know it could go that fast

but its not able to test the cache drive

1 hour ago, comet424 said:

which one the cache or the unassigned drive one.. they both the same 1 tb wd blue

That wasn't clear to me, were you using disk path or shares pahst? Cache with a user path will always be slower due to FUSE, try this

pv /mnt/disk1/path/to/large/file > /mnt/cache/file_name

Post the results from that

for copying files in Krusader i used /mnt/user for the shares to array and to copy to cache and the UD drive

i used

/disks/disks for the UD drive

/disks/cache_drive for the cache drive

is that pv command supposed to show scrolling scrambled characters like hex of a file do i let it just scroll the entire file

opps i forgot the >

i redoing the test sorry about my dislexia missed it

so i did the tests i added extra tests too

so

transport_data = 1TB WD Blue Sata UD Drive

cache_drive = 1TB WD Blue Sata Cache Drive

unraid_files = 2TB Samsung 980 Pro M.2 x2 in mirror Mode

disk1 = 14Tb Seagate Red Pro 7200 RPM

and if the sata cache drive WD isnt fast would a samsung sata cache drive be better? also same for UD drive

or do i need a m2 samsung or wd drive to be better copying since i had terrible speeds through SMB to SMB (UD to Cache drive or through Krusader where i was getting 1mb speeds or less from WD Sata to WD Sata

and or have a PICE card that has M.2 for cache drive

and are the sata 1tb drives failing slowing down ? even though they are both empty reality

Edited July 16, 2025Jul 16 by comet424

Those tests are all over the place, suggesting something else is going on, though the ones involving the array look about normal, both read and write.

the cache drive and UD drive just sit there idle now i cant remember if they are both on the SATA on the motherboard or the LSI HBA card

and the samsung 980 drives they host the appdata isos vms, system folders

and the backup files folder not linked to cache drive first..

so then its hard to narrow down the issue then

i can shove the UD drive in my desktop PC the PC and unraid both on 10g networking

is there a pv command i can go from windows to unraid to do the tests that way through the smb shares?

so i did a copy of that test file over the network so from the UD share i have to my desktop pc.. my desktop has a Samsung 990 Pro M2. 2Tb

i cant figure how to get a share of the Cache Drive to copy directly from it

but here is screen shot it stayed around that speed

so read from the WD was over 500 and copying from the desktop to the UD stuck around 150

so i now copy from Desktop to a Array Share that uses Cache Drive first

it was running at 300+ but then drops down to 12mbs or so

test copy folder is Array Folder With Cache First

test folder is Folder on the Desktop with the 990 Samsung

so copying from the Array Folder with CAche First it started off 500 then dropped down below 200 then droped to 0 for 5 seconds then started up and finishes copying at 500 in test 4 image

also if i try to move files from one of my pools to array with cache drive first is slow and if i try to watch a movie streaming off the same server... the file is choppy but shouldt i be able to stream from the server no issue especially with 10g networking shoulldnt have any issues streaming from the array but i do..

and i using asus tuf x570 motherboard for my main server.. its like i cant do multiple things at once