Date: Mon, 16 Jun 2008 16:19:16 +0200 From: Zbigniew Szalbot <z.szalbot@lc-words.com> To: Bill Moran <wmoran@potentialtech.com> Cc: freebsd-questions@freebsd.org Subject: Re: RAID 1 / disk error / Offline uncorrectable sectors Message-ID: <48567664.2070005@lc-words.com> In-Reply-To: <20080616085534.ca7524f8.wmoran@potentialtech.com> References: <48565E7A.50807@lc-words.com> <20080616085534.ca7524f8.wmoran@potentialtech.com>
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Dear all, Bill Moran: >> My understanding is that RAID 1 no longer works because of this >> error. There is a bad sector on HD (Offline uncorrectable sectors) >> and the best we can do is replace the drive? Does it make sense to >> try to turn RAID 1 on ignoring this error (however, this is done in >> BIOS so the machine would have to be taken down in order to do >> that)? It seems serious enough for me not to ignore it but then I >> know close to nothing about HDs. > > Replace the hard drive. Every modern hard drive keeps extra space > available to "remap" bad sectors. This happens magically behind the > scenes without you ever knowing about it. Once you've hit > "uncorrectable" errors, it means your re-mappable sectors are used > up, and that means the drive is on its last legs. Thank you Bill. One last question. RAID 1 is off now (degraded) and the hosting company is asking if I can try to bring it up (to check if it will work). They have given me this link http://www.freebsd.org/doc/en/books/handbook/raid.html. The problem is that as far as I understand we are not using gmirror but RAID 1 turned on in BIOS (although it is also software-based). Thank you very much in advance! Zbigniew Szalbot www.lc-words.com
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