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Message-ID: <BLU0-SMTP220EB3CE9494AA0EBBE58B098B20@phx.gbl> Date: Mon, 28 Nov 2011 18:53:46 +0000 From: wilsonjonathan <piercing_male@...mail.com> To: linux-kernel@...r.kernel.org Subject: linear raid, is partial recovery possible? Quick question regarding linear raid. If a disk fails on a linear raid I understand how the raid is non-recoverable, as a whole, as it has lost a chunk of data. However is it possible to recover the data from the non-failed portion of the raid as I assume linear works by starting at one end of the array and slowly progresses to the other? Or perhaps it is dependent on the file system on the array, eg. ext works by trying to place files distant to each other to help reduce the possibility of fragmentation? Perhaps the filesystem meta data, or some portion, may span between two physical drives which would corrupt its table? And obviously if a file spans two disks it would be missing part of its data? Does the raid underlying a file system do its own things, re-space, physical data layout, etc; or does/can a file system impact on the workings of an array? The more I look into software raid the more fasinated I become with it and its inner workings. While its way beyond me in some of the maths and the fact I am un-proficient in C it has really caught my intrigue, and all because I wanted to set up a small home server ;-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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