Got a weird one.

New Server Build:

AMD Ryzen 5 5600G with Radeon Graphics @ 3900 MHz

32 GB Memory

1 8TB Parity Drive (Barracuda)

6 8TB Data Drives (Barracuda)

2 4TB Cache Drives (Barracuda

Brought up server and began copying Data over from Ext USB JBod Cabinet

Data copied at normal speeds and once they were about 75% I invoked the mover. 

Mover runs at about 100+ MB/s for a few minutes and then crawls down to about 1 or 2 MB/s and stays there.

I did a bunch or other things like unloading all plugins, dockers, etc, reboots, etc. Same thing happened every boot.

Replaced all SATA cables. Same thing.

Replaced 12 port Sata card that was 1X with a new 4x card. Same thing.

Got frustrated and decided that maybe the 2 4TB drives were defective.

I removed the two 4TB cache drives, pointed all shares at “array”, copied system data over and rebooted.

System Then ran like a champ, copying data straight to array ran about between 125 - 180 MB/s and stayed there.

Out of curiosity, I mounted the two 4TB drives back as unassigned and started copying the data over. RUNS like a champ at 120 - 200MB/s. 

SO obviously, NOT a hardware/drive issue. 

Finally, the question: What would cause a drive mounted as cache to run so slow and normally when taken out of the cache pool. Reboots solve the issue briefly but then it slows down over a few minutes. Im guessing that there is something clogging resources that builds up while using the mover and stays there.  Not sure as I have not been a programmer in about thirty years but it seems like resources are slowly being consumed. Yes, I can upload a log file if you want but since it’s running great right now, I doubt it would contain relevant data.

Anyone got any ideas? Since this system is primarily for data storage and an over powered just for that, I don't really need a cache drive, but it might come in handy for dockers and the like.

I appreciate any ideas or comments.

Post the diagnostics when the transfer is going slow.

4 hours ago, Windlasher said:

Got a weird one.

New Server Build:

AMD Ryzen 5 5600G with Radeon Graphics @ 3900 MHz

32 GB Memory

1 8TB Parity Drive (Barracuda)

6 8TB Data Drives (Barracuda)

2 4TB Cache Drives (Barracuda

Brought up server and began copying Data over from Ext USB JBod Cabinet

Data copied at normal speeds and once they were about 75% I invoked the mover. 

Mover runs at about 100+ MB/s for a few minutes and then crawls down to about 1 or 2 MB/s and stays there.

I did a bunch or other things like unloading all plugins, dockers, etc, reboots, etc. Same thing happened every boot.

Replaced all SATA cables. Same thing.

Replaced 12 port Sata card that was 1X with a new 4x card. Same thing.

Got frustrated and decided that maybe the 2 4TB drives were defective.

I removed the two 4TB cache drives, pointed all shares at “array”, copied system data over and rebooted.

System Then ran like a champ, copying data straight to array ran about between 125 - 180 MB/s and stayed there.

Out of curiosity, I mounted the two 4TB drives back as unassigned and started copying the data over. RUNS like a champ at 120 - 200MB/s. 

SO obviously, NOT a hardware/drive issue. 

Finally, the question: What would cause a drive mounted as cache to run so slow and normally when taken out of the cache pool. Reboots solve the issue briefly but then it slows down over a few minutes. Im guessing that there is something clogging resources that builds up while using the mover and stays there.  Not sure as I have not been a programmer in about thirty years but it seems like resources are slowly being consumed. Yes, I can upload a log file if you want but since it’s running great right now, I doubt it would contain relevant data.

Anyone got any ideas? Since this system is primarily for data storage and an over powered just for that, I don't really need a cache drive, but it might come in handy for dockers and the like.

I appreciate any ideas or comments.

3 hours ago, JorgeB said:

Post the diagnostics when the transfer is going slow.

OK, I will re-allocate them as cache drives and start a transfer. Its a holiday here so I might not get to it until tomorrow. Im curious if it will reproduce as well.