Date: Sun, 26 Apr 1998 18:25:52 -0500 From: David Kelly <dkelly@hiwaay.net> To: freebsd-scsi@FreeBSD.ORG Subject: Re: does CAM do this? Message-ID: <199804262325.SAA06542@nospam.hiwaay.net> In-Reply-To: Message from Harlan Stenn <Harlan.Stenn@pfcs.com> of "Sat, 25 Apr 1998 21:33:00 EDT." <15923.893554380@brown.pfcs.com>
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Harlan Stenn writes: > > I beg to differ. > > I agree that the read will return no more than I ask for. > > However... > > With the default tape drive configuration (on the drives I've tested), if I > have a Large file on the tape blocked at, say, 10k bytes, if I issue a > read of "more than 10k but less than the size of the file" I'll get back > exactly what I asked for. > > I cannot tell that the tape was blocked at 10k bytes. How does your code to read tape differ from that of tcopy(1)? /usr/src/usr.bin/tcopy reads into a 64k buffer with the count set at 64k. Shorter reads are noted. When blocksize changes the fact is written to stdout. Did this not work on older FreeBSD systems? -- David Kelly N4HHE, dkelly@nospam.hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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