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I have been running disk certify on 4 new 28TB disks and I have gotten 4 errors at the same offset on two disks twice now. That seems highly unlikely that both drives would fail at the same points. What are the odds that they both have the same bad sectors? My understanding is that the offset is the location on the disk. Here are the logs from the failure.
2025.10.06 - 05:24:04 - SoftRAID Application: The certify disk command for disk disk14, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 16,777,216, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:24:04 - SoftRAID Application: The certify disk command for disk disk14, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 33,554,432, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:24:04 - SoftRAID Application: The certify disk command for disk disk14, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 50,331,648, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:24:04 - SoftRAID Application: The certify disk command for disk disk14, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 67,108,864, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:24:04 - SoftRAID Application: The certify disk command for disk disk14, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) failed because this disk has unreliable sectors. It should be replaced immediately (error number = 206).
2025.10.06 - 05:55:55 - SoftRAID Application: The certify disk command for disk disk12, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 16,777,216, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:55:55 - SoftRAID Application: The certify disk command for disk disk12, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 33,554,432, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:55:56 - SoftRAID Application: The certify disk command for disk disk12, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 50,331,648, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:55:56 - SoftRAID Application: The certify disk command for disk disk12, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 67,108,864, i/o block size = 16,777,216). Error during pass number = 1. This disk should be replaced immediately.
2025.10.06 - 05:55:56 - SoftRAID Application: The certify disk command for disk disk12, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) failed because this disk has unreliable sectors. It should be replaced immediately (error number = 206).
2025.10.11 - 00:20:30 - SoftRAID Application: The certify disk command for disk disk10, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 16,777,216, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 00:20:30 - SoftRAID Application: The certify disk command for disk disk10, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 33,554,432, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 00:20:30 - SoftRAID Application: The certify disk command for disk disk10, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 50,331,648, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 00:20:30 - SoftRAID Application: The certify disk command for disk disk10, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 67,108,864, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 00:20:30 - SoftRAID Application: The certify disk command for disk disk10, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt) failed because this disk has unreliable sectors. It should be replaced immediately (error number = 206).
2025.10.11 - 01:03:16 - SoftRAID Application: Certifying the disk disk10, SN: ZXA0MPJB, SATA bus 0, id 0, lun 0 (Thunderbolt). with 3 passes and 15 minutes of random access testing. During each pass, every sector on the disk is filled with a pattern. Then the pattern is read back and verified.
2025.10.11 - 01:54:36 - SoftRAID Application: The certify disk command for disk disk11, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 16,777,216, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 01:54:36 - SoftRAID Application: The certify disk command for disk disk11, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 33,554,432, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 01:54:36 - SoftRAID Application: The certify disk command for disk disk11, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 50,331,648, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 01:54:36 - SoftRAID Application: The certify disk command for disk disk11, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) encountered a verify error (offset 67,108,864, i/o block size = 16,777,216). Error during pass number = 2. This disk should be replaced immediately.
2025.10.11 - 01:54:36 - SoftRAID Application: The certify disk command for disk disk11, SN: ZXA0GWDQ, SATA bus 0, id 0, lun 0 (Thunderbolt) failed because this disk has unreliable sectors. It should be replaced immediately (error number = 206).
Posted : 11/10/2025 4:02 am
Bad cable, faulty enclosure are the most likely suspects.
What is weird is "pass number 2" on one set, meaning they completed one certify pass after the initial errors. These errors are at the very beginning of the disks, so its possible this could be shipping damage, hard to say.
What is the enclosure? DO other drives pass certify? you need to isolate whether the enclosure or disks first. (if enclosure is a 4 bay, move the drives to the other side of the enclosure i,e, slots C D instead of A B, for example.)
This post was modified 6 months ago by SoftRAID Support
Posted : 11/10/2025 10:53 am
Topic starter
@softraid-support It's a new Thunderbay 4 that I got a week ago. 3 drives are still certifying but they seem to have started over and are on pass 1 again. No drives have completed yet.
It's connected to a OWC Thunderbolt 4 dock and then to a 2025 Mac mini M4 Pro. All the cables are either Apple Thunderbolt 4 cables or OWC cables that came with the devices.
This post was modified 6 months ago by Slarti42
Posted : 11/10/2025 1:32 pm
Certify failures are always hardware failures, but you need to get to the cause. Make sure your system is not sleeping is one help.
Lets see if you still get errors.
Posted : 12/10/2025 7:53 am
Topic starter
@softraid-support I have connected the Thunderbay 4 directly to the Mac mini and set the mini to never sleep. I have restarted the Certify on all 4 drives again.
Posted : 12/10/2025 5:25 pm
