SanDisk 1TB stopped working, Sonoma 14.4.1 this time

Hi,

If DiskUtility detects your SSD drives, you could mount them, though if it doesn't, there is no way.

Even the SSD, it crashes like HDD.

Use Disk Utility and Repair Disk on the disks.

All drives die eventually, and SSD drives can wear out, however:

The time scale over which major-brand SSD drives wear out is on the order of heavy use for 50 years.

Other failures can and do happen, but it is not common. SSD drives are not 'disposable'.

RMG92382 wrote:

Thank you. Unfortunately neither drive is even detected properly.

Restart the Mac Pro and try reconnecting the SanDisk 1T SSDs one at a time.

I really don't think it is a drive failure. Both are relatively new (months or years old, not decades) and it is not likely both would fail at the same time. They have been in separate places for weeks, so they were not even exposed to the same environments (extreme temp, moisture, dropping, etc.) That's why I completely suspect an OS issue.

Did someone else have access to the SanDisk 1T SSDs?

If they were formatted by another Mac or reinitialized by a PC then that could be the problem.

<< neither drive is even detected properly. >>

Detection by MacOS requires the drive be PERFECT, else it will not Mount.

Do you mean by not detected by Disk Utility?

please clarify.

A drive that refuses to tell Disk Utility its make&model and a reasonable non-zero size/capacity is not useable and cannot be repaired or erased.