Date: Tue, 21 Aug 2007 08:57:22 +0400 From: "Artem Kuchin" <matrix@itlegion.ru> To: <davids@webmaster.com>, <freebsd-stable@freebsd.org> Subject: Re: A little story of failed raid5 (3ware 8000 series) Message-ID: <02fe01c7e3af$d3b86ed0$0c00a8c0@Artem> References: <MDEHLPKNGKAHNMBLJOLKCENEGEAC.davids@webmaster.com>
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David Schwartz wrote: >> A day ago at 11 am i have turn off the server, >> pull out the old driver, installed a new one, turned of the server >> and started rebuild in an hour from remote location via web >> interface. After about 5 minuted the machine became unresponsive. >> Tried rebooting - nothing. I went to the machine and fingure out, >> that rebuild failed (0%) and some data cannot be read because of bad >> sectors. > > Why would you power cycle a RAID 5 array with a failed drive? That's > like the biggest no-no that there is. When you lose a drive on a RAID > 5 array, you are vulnerable until a replacement drive is configured > and the array is rebuilt. Any high risk operations during that time > would be foolhardy. Um.. it is because i did not have a map of hot swap baskets to conroller ports and i needed to check every driver basket to understand which port it sits on. I have no choise, i think. >> So, no raid5 or even raid 6 for me any more. Never! > > Since RAID6 would have saved you from what presumably was a drive > failure before a rebuild could be done, it's hard to understand why > you would say this is a reason to avoid RAID 6. Perhaps you would do > better to understand your failure and avoid the causes of the failure > rather than avoiding the things you happened to be using at the time > of the failure. > > If you get food poisoning while wearing a blue shirt, the solution is > not to avoid blue shirts in the future. Read the post before. I still don't known which driver has the bad sectors. And it is very posible that EACH driver has them. RAID6 would not help then. -- Artem
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