Question Lots of disk activity on my DS918+ when computer starts

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Question Lots of disk activity on my DS918+ when computer starts

199
22
NAS
DS923+ (16GB)
Operating system
  1. Windows
It seems like everytime I startup my computer, my NAS starts to do alot of disk IO for a long time and I have no idea why. I've mapped a few network shares in Windows Explorer and I'm using Synology Drive aswell but I find no reason why the disks are working that much.. Resource Manager on my NAS gives no explanation either.
Hints anyone?
 

fredbert

Moderator
NAS Support
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Could be Syno Drive validating the status of the PC local folders vs the NAS. There’s nothing to guarantee that you don’t access the NAS folders and change content while the PC is shutdown. Also the NAS doesn’t know that the PC is shutdown just that it’s not communicating and you could’ve change local files.
 

jeyare

Subscriber
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833
NAS
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Operating system
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  2. Windows
look there are just two possible recommendations:
1. send us your IP and your credentials and we will find detailed description your findings
or
2. you will send us detailed description of your findings

Because no one can see into your Synology Resource manager except you.
What disk/disks (basic, raid, ...), what is your expected level of disk IOs?
What packages do you have installed, how many concurrent users are there during the high IO ,...

Simple - you need take more time for detailed description, otherwise no one can help you. Or worse, every single help will just shoot into dark.
 
199
22
NAS
DS923+ (16GB)
Operating system
  1. Windows
Here's some screenshots from when the drives are working...


1578861371075.png


1578861409129.png

1578861461129.png
 

jeyare

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2,486
833
NAS
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what about Resource monitor/Performance/Disk screenshot? Most important, when we need to find “abnormal” IO operation?
from attached pictures:
- zero IO from Services (first screenshot)
- there is normal activity in Processes (indexing)
- also network is silent
For precise analyze it’s necessary to use Linux “iotop” command in SSH. You need install it manually.
 
199
22
NAS
DS923+ (16GB)
Operating system
  1. Windows
The disk io continued after I turned off my Windows machine when I tried last night so perhaps it's not entirely related to my PC after all.. To be continued..
 
1
0
NAS
DS213, DS1019+
Operating system
  1. Linux
  2. Windows
Mobile operating system
  1. Android
Run this command to show top processes by RAM and CPU while the problem is happening.

ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head

Output should look like this...

1579014666436.png
 

jeyare

Subscriber
2,486
833
NAS
Synology, TrueNAS
Operating system
  1. Linux
  2. Windows
Run this command to show top processes by RAM and CPU while the problem is happening.

ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head

Output should look like this...

View attachment 815
Such command will not show you target answer for IO operation demand - as was requested in initial description (above). It will show you just CPU and RAM demand for processes, but you will miss the disk IO answers. Not all process demands will spend disk resources.

Then for the specific disk operation discovery is “iotop” command one of common approach. It helps me many time.

Still is missing answer for my request:
- the screenshot from Resource monitor/performance/Disks.

... and OFC, what is the feeling level of “abnormal” IO from the user?
Then we can’t provide right evaluation and recommendation. Just a shut in the dark.
 

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