Date: Tue, 05 Feb 2002 19:14:54 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Yar Tikhiy <yar@FreeBSD.ORG> Cc: "M. Warner Losh" <imp@village.org>, hackers@FreeBSD.ORG Subject: Re: Get disk device size? Message-ID: <3C609FAE.9B4B4EA1@mindspring.com> References: <20020205125557.A10266@comp.chem.msu.su> <20020205.093006.104650505.imp@village.org> <20020206022029.A95467@comp.chem.msu.su>
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Yar Tikhiy wrote: > Thanks, the DIOCGDINFO ioctl is nearly what I was looking for. > > However, there seems to be a number of problems (or my misunderstandings?) > about it. This ioctl can't be used against non-BSD slices; it > fails on them with EINVAL due to code in kern/subr_diskslice.c. > OTOH, invoking this ioctl on a partition (e.g. ad0s1a) will result > in the parameters of the whole slice/disk (i.e. ad0s1.) Isn't all > that a bit inconsistent? E.g. a filesystem layer doesn't need to > distinguish between say ad0, ad0s1, and ad0s1a -- they're just > disk devices for it. Or did I miss any important point? You missed the fact that there is not a uniform kernel API for manipulating disk space. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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