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How to use a SoftRAID startup volume with High Sierra

If you're using High Sierra, and booting up from a SoftRAID volume, you'll need to follow the steps given in this forum post, since the macOS High Sierra Installer does not recognize SoftRAID volumes as valid startup volumes.

Failed Certification
#1
I got new OWC mercury elite Pro Quad and 4x 8.0TB Hitachi Deskstar NAS drives. I have initialize each drive and started certification on each drive.
3 of them are almost done without the errors(knock the wood) , 4th failed on 2 of 3 pass with error at the bottom of the post.

Question: Is this drive bad? What will happend if I run Certify again, can softraid software remap those bad blocks, can I trust this drive or I should ask for replacement? SoftRAID app reported 4 errors.

Regards,


Here is softRAID log

Jun 28 19:49:05 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 hung while reading (offset 3,378,433,228,800, i/o block size = 1,048,576). This disk should be replaced immediately.
Jun 28 19:52:10 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 encountered a read error (offset 3,378,433,228,800, i/o block size = 1,048,576). Error during pass number = 2. This disk should be replaced immediately.
Jun 28 19:52:20 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 hung while reading (offset 3,378,434,277,376, i/o block size = 1,048,576). This disk should be replaced immediately.
Jun 28 19:55:05 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 encountered a read error (offset 3,378,434,277,376, i/o block size = 1,048,576). Error during pass number = 2. This disk should be replaced immediately.
Jun 28 19:55:16 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 hung while reading (offset 3,378,435,325,952, i/o block size = 1,048,576). This disk should be replaced immediately.
Jun 28 19:58:00 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 encountered a read error (offset 3,378,435,325,952, i/o block size = 1,048,576). Error during pass number = 2. This disk should be replaced immediately.
Jun 28 19:58:10 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 hung while reading (offset 3,378,436,374,528, i/o block size = 1,048,576). This disk should be replaced immediately.
Jun 28 20:00:55 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 encountered a read error (offset 3,378,436,374,528, i/o block size = 1,048,576). Error during pass number = 2. This disk should be replaced immediately.
Jun 28 20:00:55 - SoftRAID Application: The certify disk command for disk disk10, SN: 123456789019, USB3 bus 10, id 5 failed because this disk has unreliable sectors. It should be replaced immediately (error number = 66).
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#2
What you know for certain is there is a hardware issue.
You can see the drive hung, then a read error as a result.
the cause of this could be suspect. Since you are doing 4 at once, it is unlikely to be a cable etc. It must either be the drive, or the slot the drive is in.

go ahead and recertify. See what happens. If it fails again around the same point, you know it is the disk. See if any other disks fail as they certify.
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