[Share] [Condividere] Initialization F4-423

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Hi everyone.....
I understand it takes time to initialize a RAID 5 with four 6TB hard drives, but is it possible that it's still at 6.78% in a day?
It's been running since yesterday at noon, and it's not stuck....but this way it'll take two weeks to finish...
Is there anything I can do to speed this up?

Fabio

[EriChan]

Are you creating an array for the first time? After setting up an array with multiple drives, synchronization is a necessary process. This process takes a long time, and the larger the drive capacity, the longer it will take. For a 10TB drive, the estimated synchronization time is approximately 20 hours.

What is the current progress? You can open the terminal and enter the following command to check the synchronization speed:

Code: Select all

cat /proc/mdstat

To better assist you, I need to know a few key details:

• What is the specific model of the hard drives? (This is critical: please check the "Model" on the drive label, e.g., WD60EFAX or ST6000VN001)

• During initialization, are you copying large amounts of data to the NAS or running high-load applications?

• Are the drives brand new? Does any drive show warnings or anomalies in the "Drive Status"?

[nikolasalexander1]

RAID 5 initialization on large 6TB drives can be bottlenecked by low default sync speeds in Linux. You can often speed this up significantly via SSH by increasing the speed_limit_max and speed_limit_min values in /proc/sys/dev/raid/. Increasing the minimum sync speed gives the rebuilding process higher priority.

[Felix]

RAID 5 initialization on large 6TB drives can be bottlenecked by low default sync speeds in Linux. You can often speed this up significantly via SSH by increasing the speed_limit_max and speed_limit_min values in /proc/sys/dev/raid/. Increasing the minimum sync speed gives the rebuilding process higher priority.

You can adjust the RAID sync speed directly from the TOS interface.

Please go to Control Panel → Storage Manager → Storage Pool, then click the Settings icon (as shown in the screenshot) and select the appropriate RAID sync speed option.

- Slow sync: Reduces the impact on system performance, but the synchronization process will take longer.
- Fast sync: Increases the synchronization speed, but may affect overall system performance.
- Custom: Allows you to manually configure the sync speed according to your requirements.

For large-capacity RAID 5 arrays (for example, 6TB drives), selecting Fast sync or setting a higher value under Custom can help reduce the RAID initialization/rebuild time.

Please note that increasing the sync speed will consume more system resources and may affect normal NAS performance while the RAID synchronization is running.