Re: RAID-1 and disk I/O
On Sun, 18 Jul 2021 at 21:08, <rhkramer@gmail.com> wrote:
> On Saturday, July 17, 2021 09:30:56 PM David wrote:
> > The 'smartctl' manpage explains how to run and abort self-tests.
> > It also says that a running test can degrade the performance of the drive.
> Interesting -- not surprising, makes sense, but something (for me, at least)
> to keep in mind -- probably not a good idea to run on an old drive that hasn't
> been backed up.
Sorry if my language was unclear. If you read the manpage context, it's
explaining that drives can be tested without taking them out of service.
So performance is only "degraded" while the test is running, compared
to normal operation, because the drive is also busy testing itself.
It doesn't mean permanent degradation.
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