According to Tom's Hardware FR, Seagate is infected by an epidemic of breakdowns concerning its 7200.11 series of disks.
The breakdown are characterized by a sudden disappearance of the system disk, as if their electronics had burned. It is, in fact, a bug of their firmware which would lead the disk to be put into a mode of protection from which it cannot leave.
If the solution appears simple (i.e. an update the firmware) it cannot be applied once the disk has entered this mode, and Seagate still does not propose an update.
This brings back to mind the breakdowns with the series of 2.5" disks marked with famous firmware 7.0.1 which almost always ended up giving up the ghost after one year of use. There too, Seagate never communicated officially on this defect, preferring to play it deaf, a ploy in which Apple followed them.
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