Date: Tue, 25 Feb 2020 18:56:16 -0300 From: Mario Olofo <mario.olofo@gmail.com> To: Karl Denninger <karl@denninger.net> Cc: freebsd-stable@freebsd.org Subject: Re: Running FreeBSD on M.2 SSD Message-ID: <CAP4Gn9D1==FR8S4O3jJbLXwNEYqffL2L_uhK8yHD2xBzJGemqQ@mail.gmail.com> In-Reply-To: <6e329bb8-b96e-fa16-cc73-426685593943@denninger.net> 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> <20200225145346.GA42880@phouka1.phouka.net> <6e329bb8-b96e-fa16-cc73-426685593943@denninger.net>
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Hello, I reinstalled FreeBSD 12.1 on my SSD (in the swap partition of my Linux to test) and on my Hybrid HDD. Just configured and rc.conf to start my wifi dongle, downoaded git, node and npm via pkg and... as you can see in my screenshot, the ZFS already shows corrupted data... Can't been able to load the FreeBSD from the HDD though, don't know why, if someone direct me how to load the kernel from the HDD via loader or grub2, I'll try =3D) Mario Em ter., 25 de fev. de 2020 =C3=A0s 12:11, Karl Denninger <karl@denninger.n= et> escreveu: > > On 2/25/2020 9:53 AM, John Kennedy wrote: > > On Tue, Feb 25, 2020 at 11:07:48AM +0000, Pete French wrote: > >> I have often wondered if ZFS is more aggressive with discs, because > until > >> very recently any solid state drive I have used ZFS on broke very > quicky. ... > > I've always wondered if ZFS (and other snapshotting file systems) > would help > > kill SSD disks by locking up blocks longer than other filesystems > might. For > > example, I've got snapshot-backups going back, say, a year then those > blocks > > that haven't changed aren't going back into the pool to be rewritten (a= nd > > perhaps favored because of low write-cycle count). As the disk fills > up, the > > blocks that aren't locked up get reused more and more, leading to extra > wear > > on them. Eventually one of those will get to the point of erroring out= . > > > > Personally, I just size generously but that isn't always an option f= or > > everybody. > > I have a ZFS RaidZ2 on SSDs that has been running for several /years > /without any problems. The drives are Intel 730s, which Intel CLAIMS > don't have power-loss protection but in fact appear to; not only do they > have caps in them but in addition they pass a "pull the cord out of the > wall and then check to see if the data is corrupted on restart" test on > a repeated basis, which I did several times before trusting them. > > BTW essentially all non-data-center SSDs fail that test and some fail it > spectacularly (destroying the OS due to some of the in-flight data being > comingled on an allocated block with something important; if the > read/erase/write cycle interrupts you're cooked as the "other" data that > was not being modified gets destroyed too!) -- the Intels are one of the > very, very few that have passed it. > > -- > -- Karl Denninger > /The Market-Ticker/ > S/MIME Email accepted and preferred >
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