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Date:      Tue, 30 May 2023 19:25:13 +0300
From:      Lena@lena.kiev.ua
To:        freebsd-questions@FreeBSD.org
Subject:   Re: read and write back full disk to trigger relocation
Message-ID:  <20230530162513.GK1030@lena.kiev>
In-Reply-To: <1957739901.520492.1685310340560@ichabod.co-bxl>
References:  <a111b6a7-0bf8-d3b9-9611-a7fbf36635b3@artem.ru> <1957739901.520492.1685310340560@ichabod.co-bxl>

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> From the dd(1) manpage:
> 
>      Do a refresh of a disk drive, in order to prevent presently recoverable
>      read errors from progressing into unrecoverable read errors:
> 
>            dd if=/dev/ada0 of=/dev/ada0 bs=1m
> 
> That won't trigger relocation, but it will refresh the decaying data.

Would that be useful for SSD?



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