Date: Fri, 4 Mar 2016 11:58:58 +0100 From: Borja Marcos <borjam@sarenet.es> To: Steven Hartland <killing@multiplay.co.uk> Cc: Scott Long <scott4long@yahoo.com>, FreeBSD-scsi <freebsd-scsi@freebsd.org> Subject: Re: mpr(4) SAS3008 Repeated Crashing Message-ID: <BC3018EA-A1F3-4C7C-A179-58553457A938@sarenet.es> In-Reply-To: <56D95266.301@multiplay.co.uk> References: <56D5FDB8.8040402@freebsd.org> <56D612FA.6090909@multiplay.co.uk> <A8859ECA-0B58-42A8-AA49-DF6AA3D52CC6@sarenet.es> <E74F5225-1EA8-4B60-ADDC-7B13E1003184@yahoo.com> <D7E0BCCE-EB44-4EF9-8F17-474C162F7D7C@sarenet.es> <56D805FD.50500@multiplay.co.uk> <F9B68610-12C6-4D32-88CA-A34A185F9AD1@sarenet.es> <F5E05621-FF84-4BED-B1A7-3252715CD53B@yahoo.com> <B2147AEC-2831-443C-8FA0-4148B37AAF95@sarenet.es> <56D95266.301@multiplay.co.uk>
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> On 04 Mar 2016, at 10:16, Steven Hartland <killing@multiplay.co.uk> wrote: > > Its very rare but we've also seen this type of behaviour from a failing Intel CPU. There was no other indication the CPU had an issue, which one might expect, so just wanted to make you aware of the possibility. > > That said the most common cause of this we've seen, when its not a common disk or disks, is a bad backplane or cabling to the backplane. Now I’m really curious! How did you determine that it was the CPU? And what kind of issue was it causing? Noise in the power rails? Interference? Borja.
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