From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4772EAB6.9000701@gmail.com> Date: Wed, 26 Dec 2007 18:58:46 -0500 From: Robert William Fuller User-Agent: Thunderbird 2.0.0.6 (X11/20071013) MIME-Version: 1.0 To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] ata drive capabilities References: <13426df10712252231u167ae5c2k616534728b97e338@mail.gmail.com> <20071226195247.GE16180@hermes.my.domain> In-Reply-To: <20071226195247.GE16180@hermes.my.domain> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: 227b2aca-ead3-11e9-9d60-3106f5b1d025 Christian Kellermann wrote: > Thanks for your replies! > > The reason I asked is that I am thinking about a couple of methods > to detect failures of my two mirrored disks (by fs) automatically. > How do you check if your disks are still ok? I know I could invest The newer high capacity drives all have high "raw error read rates" but they're generally all corrected as indicated by an equivalent value of "hardware ECC corrected." So this does not seem to really correspond to anything. Frankly, the one SMART variable I've seen that seems to always correspond to impending disk failure is the "reallocated sector count." Once you see that incrementing, it's time to decommission that disk for anything other than scratch storage. Such drives are good for intermediate files of non-linear video editing until they die.