Date: Tue, 25 Feb 2020 16:14:28 +0200 From: Daniel Kalchev <daniel@digsys.bg> To: Pete French <petefrench@ingresso.co.uk> Cc: Mario Olofo <mario.olofo@gmail.com>, freebsd-stable@freebsd.org Subject: Re: Running FreeBSD on M.2 SSD Message-ID: <DF1D01DB-7970-400A-B76C-A395EB2C9F14@digsys.bg> In-Reply-To: <1821830b-e43f-b23a-49d6-e1a2d1e4aa83@ingresso.co.uk> References: <CAP4Gn9DFAoQtq6NP4hZ-Jq=ddnhp7Bzc_X%2BSce2FPVWn6kjASg@mail.gmail.com> <202002250115.01P1F9KX090465@mail.karels.net> <CAP4Gn9CqCSk5Lof_-05j1S0EWmTdB_HRfOe5zVig5khf7wJ0ow@mail.gmail.com> <188F34DA-192C-4D44-96B5-18A7DAE8EC67@digsys.bg> <6028c786-8610-01d9-818e-6f69a2fe9645@ingresso.co.uk> <CAP4Gn9D5FwZFrrS9uyYFU6MoRpppTcDYZdzRKqH5CPywUSJCZQ@mail.gmail.com> <1821830b-e43f-b23a-49d6-e1a2d1e4aa83@ingresso.co.uk>
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If my memory serves well, TRIM was originally not enabled by default on = FreeBSD, because there were many drives that claimed to support it, but = didn=E2=80=99t, or didn=E2=80=99t support it properly. That sort of is = resolved today and WD Green is supposedly relatively recent drive. I am not aware of disabling TRIM creating any kind of problem for data = consistency or drive longevity, except that it leads to slower writes, = as the drive runs out of pre-erased blocks to write to. This is = typically more pronounced on =E2=80=9Ccheaper=E2=80=9D drives like this = one where there is not much over-provisioning but much less pronounced = on =E2=80=9Cserver=E2=80=9D drives that keep certain buffer capacity on = the driv eunused for precisely that purpose. But why should a drive without TRIM wear more quickly? Daniel > On 25 Feb 2020, at 16:07, Pete French <petefrench@ingresso.co.uk> = wrote: >=20 >=20 >=20 > On 25/Feb/2020 13:28, Mario Olofo wrote: >> Good morning all, >> @Pete French, you have trim activated on your SSDs right? I heard = that if its not activated, the SSD disc can stop working very quickly. >=20 > On the curent dfives, yes, but I have run with trim disabled in the = past, It kinds of depends on the drive - so were horirbly slow on trim, = and trim could be a big bottleneck. Havent seen that on a recent drive = though, and they all now have trim enabled on them. >=20 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to = "freebsd-stable-unsubscribe@freebsd.org"
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