Date: Tue, 21 Dec 1999 00:39:41 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: Bob Bishop <rb@gid.co.uk> Cc: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>, freebsd-arch@freebsd.org, Stephen McKay <syssgm@detir.qld.gov.au>, Greg Lehey <grog@lemis.com>, Thomas David Rivers <rivers@dignus.com>, Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>, Hauke Fath <hf@Melog.DE> Subject: Re: filemarks? Message-ID: <Pine.BSF.4.10.9912210038470.56551-100000@beppo.feral.com> In-Reply-To: <Pine.BSF.4.10.9912210029150.56276-100000@beppo.feral.com>
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[ sorry, I'm tired- let me restate this ]: > > EARLY WARNING is actually configurable for most SCSI drives. If you don't > get EARLY WARNING (which is the EOM bit in sense data) associated with a > plain old UNIT ATTENCTION sense key, you'll get a VOLUME OVERFLOW sense > key (hard EOT). As far as I know you usually don't get EARLY WARNING > detection on reads for these drives- this only happens on writes- I don't > have my specs handy or I'd go back and make sure of this. This should read: EARLY WARNING is actually configurable for most SCSI drives. If you don't get EARLY WARNING (which is the EOM bit in sense data) associated with a plain old UNIT ATTENCTION sense key, you'll *still* get a VOLUME OVERFLOW sense key when you hit hard EOT. As far as I know you usually don't get EARLY WARNINGdetection on reads for these drives- this only happens on writes- I don't have my specs handy or I'd go back and make sure of this. > > The way I was specifying this is that subsequent reads aren't confused by > this at all. If you miss EARLY WARNING (say the drive isn't strapped for > it), you get VOLUME OVERFLOW (hard EOT) anyway on writes. > > -matt > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-arch" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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