Date: Wed, 24 Jul 2019 19:53:54 -0500 From: Adam <amvandemore@gmail.com> To: James Snow <snow@teardrop.org> Cc: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: Re: Random panics in 11.0 and 12.0 on J1900 Message-ID: <CA%2BtpaK1DhR64iyKqZWBujaz_VhkoH1nv9Ek%2BY8PcKhK27=kz2w@mail.gmail.com> In-Reply-To: <20190710162636.GM5965@teardrop.org> References: <20190710162636.GM5965@teardrop.org>
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On Wed, Jul 10, 2019 at 11:28 AM James Snow <snow@teardrop.org> wrote: > I have a set of J1900 hosts running 11.0-RELEASE-p1 that experience > seemingly random panics. What is the size of this J1900 set? Do you also have J1900 which do not exhibit the problem? > One, memtest has turned up no errors on 12.0 host I witnessed the panic > on. > memtest cannot conclusively confirm dimm is good, it is only conclusive on bad ones. You can find more info about others learning this lesson here(see extended comments): https://superuser.com/questions/547822/how-many-passes-are-enough-with-memtest > Two, a small number of systems on the same hardware are running > 10.3-RELEASE, and have experienced no panics in their history. Panics > have only happened on 11s, and now 12. > Once upon a time in a hypothetical universe, I had a stick of ram which would run on Win98 for very long periods without issue. It wouldn't even boot with Win NT. After the manufacturer sent the same one back twice, I tased it and RMA'd again. This time, I got a new stick and all was good. The point is memory issues can be very subtle and replacing with known good modules is the easiest way to be sure. -- Adam
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