On Sat, 2023-05-06 at 10:19 +1000, Eyal Lebedinsky wrote:
> I wonder if this situation can be related to the controller
> (LSISAS2008) or maybe the cabling.
>
> Four cables attach to a socket (there are two on this controller) and
> only three of the disks on one bundle show the problem and not the
> fourth, and none of the three on the second bundle have issues.

Or an inadequate power supply, if a bunch of drives are effected.

Some cables are a bad fit, or have become a bad fit after time, and
unplug/replug exercising them restores things.

Contaminated metal makes for poor connections.  A spray with contact
cleaner, perhaps even a scrub with a brush, can help some things.

Folded/kinked/crushed SATA cables is a problem.  They are a
transmission line and mangled cables adversely changes their
characteristics.  Straighten out cable that came folded up from the
manufacturer, fashion any bends needed to lay your cables into smooth
curves.

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