Date: Thu, 17 Feb 2011 21:46:43 +0100 From: Kurt Jaeger <lists@c0mplx.org> To: freebsd-stable@freebsd.org Subject: Re: 3TB disc and block alignment Message-ID: <20110217204643.GJ34314@home.opsec.eu> In-Reply-To: <20110217180140.GL66849@dan.emsphone.com> References: <20110217115653.GH34314@home.opsec.eu> <AANLkTi=QMXvFtTyY9BUGg56VtTuac3G_0LnXaVboJQQz@mail.gmail.com> <20110217124515.GI34314@home.opsec.eu> <4D5D1D10.7010000@digsys.bg> <20110217180140.GL66849@dan.emsphone.com>
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Hi! > > According to Hitachi, this is an 512b drive. > > Correct. This isn't a 4k drive. Datasheet: > > http://www.hgst.com/internal-drives/enterprise/ultrastar/ultrastar-7k3000 Hmm, wasn't the issues with 3T drives, that they internally use 4K blocks and emulate 512 and that therefore 8 block alignments are an performance issue ? The reason I'm asking: I encounter the problem of the lost secondary GPT table: Feb 17 22:15:44 vserv1 kernel: GEOM: ad7: the secondary GPT table is corrupt or invalid. Feb 17 22:15:44 vserv1 kernel: GEOM: ad7: using the primary only -- recovery suggested. Feb 17 22:15:44 vserv1 kernel: GEOM: ufsid/4d5d8faa10b63ac1: the secondary GPT table is corrupt or invalid. Feb 17 22:15:44 vserv1 kernel: GEOM: ufsid/4d5d8faa10b63ac1: using the primary only -- recovery suggested. I had this disc connected via some usb2sata adapter as da0, and there was no error message when I did the 'gpart create ad7' thing. When I now connect it to the some other box as ad7 and this error message appears: Which of the two has the problem with the controller not getting the large size disc correct ? -- pi@opsec.eu +49 171 3101372 9 years to go !
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