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NAS / ISSUE - Enquiries - 02-28-2025
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.
RE: NAS / ISSUE - ed - 03-06-2025
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.
RE: NAS / ISSUE - dyogramthame - 03-12-2025
(02-28-2025, 10:35 PM)Enquiries Wrote: 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.