Date: Tue, 04 Dec 2001 15:38:57 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: David Malone <dwmalone@maths.tcd.ie> Cc: Dragon Fire <dragonfire820@mediaone.net>, freebsd-hackers@FreeBSD.ORG Subject: Re: block devices Message-ID: <3C0D5E91.3D45207B@mindspring.com> References: <005501c17cc4$c770d7a0$037d6041@gandalf> <20011204140738.A30798@walton.maths.tcd.ie>
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David Malone wrote: > On Tue, Dec 04, 2001 at 08:08:34AM -0500, Dragon Fire wrote: > > I was trolling around the FreeBSD kernel source and the dev directory and > > noticed there is no bdevsw structure and no block driver files. Is > > everything implemented in terms of character devices now? Looks like all the > > support for block devices is contained in the cdevsw struct. > > Since no userland programs ever really had a good excuse for > accessing block devices they have been retired from /dev. Block > devices still exist, but are only accessable within the kernel. Actually, I found a third reason for block devices (apart from the Apple UDF FS and disk initialization) the other day: to permit reading of QIC-11 and QIC-24 tapes produeces on NCR Tower-XP, NCR Tower-32, and Sun-3 equipment. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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