Date: Thu, 27 Jun 2013 08:16:48 -0700 From: Charles Swiger <cswiger@mac.com> To: =?utf-8?Q?Nikola_Pavlovi=C4=87?= <nzp@riseup.net> Cc: freebsd-questions@freebsd.org Subject: Re: Troubleshooting a gmirror disk marked broken Message-ID: <36C962B9-ABC4-45E3-AC94-46D6CEE960E1@mac.com> In-Reply-To: <20130627023837.GA7685@sputnjik.localdomain> References: <20130627023837.GA7685@sputnjik.localdomain>
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Hi-- On Jun 26, 2013, at 7:38 PM, Nikola Pavlovi=C4=87 <nzp@riseup.net> = wrote: [ ... ] > At the moment I'm attaching smartctl -a results for both disks (ad4 = was > marked broken). As I'm completely useless in deciphering smartctl > results (apart from being thought by experience to pretty much > ignore(tm) the 'Pre-fail' statuses), I'd appreciate assessment from = more > knowledgeable people. As Adam said, your drives haven't failed, but they are on the way out. Pay close attention to Reallocated_Sector_Ct, especially if it starts jumping upwards. You might also want to check the thermals; the Seagate is running at = 52C, which is significantly hotter than it ought to be, except for maybe a = laptop. I'd much rather see a drive running below 40C.... If you haven't rebuilt the mirror already, running a full disk read scan against both drives (ie, via "dd if=3D/dev/ad4 of=3D/dev/null bs=3D1m" = or similar) might be prudent. That will help identify/migrate any sectors which are failing but still recoverable via ECC to the spare sectors. Regards, --=20 -Chuck
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