NAS / ISSUE

[Enquiries]

I have built my NAS on
1. HP Intel® Xeon® CPU duell E5-2640 v3 @ 2.60GHz

2. 96 GiB DDR4 Multi-bit ECC

32 TB Storage (4 - 4 TB WD 5400 rpm CMR drive,
2 -8 TB Toshiba 7200 rpm CMR)

3. 1 TB ssd 2 NVME and 1 SSD drive

OS - Unraid 7.

The only issue I having is a problem witiowait.

I'm not sure how to resolve, identify the disk(s) causing the wait status.

Any suggestion is greatly appreciated.

I following you on YouTube, this where I found this link.

[ed]

The I/O wait issue can be tricky, but here are a few steps to help identify the root cause:

Check Disk Health: Start by checking the health of your drives. You can use tools like smartctl or Unraid’s built-in SMART diagnostics to check for any potential issues or errors on your disks.

Monitor Disk Activity: Use iostat or iotop to monitor which disk is experiencing heavy read/write activity. These tools can give you a real-time overview of disk I/O performance and help you pinpoint the problematic disk.

Check System Logs: In Unraid, look at the system logs under the “Logs” tab. Any disk-related errors or timeouts should appear here, which could give you more context on the I/O wait issue.

Test Each Disk: If you suspect a particular drive, you can try temporarily disconnecting it and see if the issue resolves. This way, you can isolate the problem.

Disk Queue Length: Check if there’s an unusually high disk queue length in the I/O statistics. A high queue length can indicate that a disk is struggling to keep up with requests.

As for your hardware setup, with a mix of 5400 rpm and 7200 rpm drives, the slower drives might occasionally cause delays, especially under heavy load. It could be worth considering whether certain drives are being over-utilized and causing the bottleneck.

[dyogramthame]

I have built my NAS on
1. HP Intel® Xeon® CPU duell E5-2640 v3 @ 2.60GHz

2. 96 GiB DDR4 Multi-bit ECC

32 TB Storage (4 - 4 TB WD 5400 rpm CMR drive, Sprunki Game
                            2 -8 TB Toshiba 7200 rpm CMR)

3. 1 TB  ssd 2 NVME and  1 SSD drive

OS - Unraid  7.

The only issue I having is a problem witiowait.

I'm not sure how to resolve, identify the disk(s) causing the wait status.

Any suggestion is greatly appreciated.

I following you on YouTube, this where I found this link.

Try the following steps to fix the error

1. Identify the disk causing the high I/O wait
- Use `htop` or `top`:
Open a terminal and run:

htop
Look for processes using high I/O. If wait% is high, the disk is probably the bottleneck.

- Check I/O usage with iostat (install sysstat if necessary):

iostat -x 1
Look for drives with high await and util% values.

- Use iotop to monitor disk activity:

iotop -o
This command will show which processes are using the most I/O.

- Check the Unraid UI - Disk Performance Tab:
Unraid provides disk activity statistics in the web interface. Check for unusually high read/write activity.