Date: Mon, 15 Nov 1999 03:37:54 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: current@freebsd.org Subject: FreeBSD 4.0 SCSI Tape Driver Message-ID: <Pine.BSF.4.10.9911150337250.81002-100000@beppo.feral.com>
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The design phase for FreeBSD 4.0 is coming to a close. There are a couple of things I'm planning on (belatedly) for the SCSI tape driver. I'd like feedback and suggestions about these and other things, so pass 'em my way. One change I'm thinking about is probably controversial, so I'd like to get some feedback on it now. Since this is a major release step, this would be the time to make such changes if at all. I'd like to make the *default* tape EOT handling behaviour such that all tapes use only *one* filemark at EOT rather than the current *two* filemarks at EOT (except for QIC). Probably one of the highest breakage items for this driver is someone adding yet another unknown QIC-like tape device which behaves unhappily when the driver tries to write two filemarks at the end of tape. Insofar as I know, the convention for two filemarks at the end of tape is useful only for devices that cannot determine physical eot (1/2" Reel tapes)- and I haven't seen those around for quite some time. There already is an ioctl (and control via mt(1)) to change the default eot model. There could very well also be a config option too. I'd like to make the 1 Filemark at EOT the default though. I'll have to fix tcopy, and I want to give some thought so that there are no compatibility and interchange problems, but if those concerns are adequately covered I think this is the right thing to do. So- let me know, either via this list or privately. Thanks in advance... -matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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