Messages in this thread | | | From | Denys Vlasenko <> | Subject | Re: Strage buffer behaviour | Date | Mon, 12 Nov 2007 12:44:53 -0700 |
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On Sunday 11 November 2007 11:33, Tino Keitel wrote: > The dd command reads 100 MB from each partition two times in a row. It > looks like sda1 and sda2 are not bufferd (the first 4 dd runs), but > sda3 and sda4 are (the last 4 dd runs). > > The computer is a Mac mini with a 2,5" SATA hard disk. The first 2 > partitions contain EFI and MacOS X, and are unused in Linux. The last 2 > partitions are an ext3 partition for / and an LVM for the rest of the > sytem. > > Any hints how the dd/buffering behaviour could be explained? The system > was mostly idle, and the numbers are reproducible across reboots.
IIRC only mounted partitions' reads are cached. -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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