[Share] [Condividere] Initialization F4-423

Initialization of newly purchased TNAS or re-installation of your TNAS
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sound
Posts: 24
Joined: 01 Jan 2021, 01:19
Italy

[Share] [Condividere] Initialization F4-423

Post by sound »

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... :shock:
Is there anything I can do to speed this up? :?:

Fabio
F4-210 - F4-423 - D5-300
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EriChan
TM Support
Posts: 196
Joined: 06 Jan 2026, 12:27
United States of America

Re: [Share] [Condividere] Initialization F4-423

Post by 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"?
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nikolasalexander1
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Joined: 26 Jun 2026, 08:25
United States of America

Re: [Share] [Condividere] Initialization F4-423

Post by 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.
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