Date: Wed, 15 Nov 2000 14:57:04 -0600 From: "Jacques A. Vidrine" <n@nectar.com> To: Matthew Jacob <mjacob@feral.com> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: [ TAPE TIMEOUT] Re: afio & SCB 0xc - timed out while idle Message-ID: <20001115145704.A10481@hamlet.nectar.com> In-Reply-To: <Pine.BSF.4.21.0011151024500.96506-100000@beppo.feral.com>; from mjacob@feral.com on Wed, Nov 15, 2000 at 10:29:48AM -0800 References: <20001115101805.A43215@spawn.nectar.com> <Pine.BSF.4.21.0011151024500.96506-100000@beppo.feral.com>
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On Wed, Nov 15, 2000 at 10:29:48AM -0800, Matthew Jacob wrote: > Hmm. Well, a couple of things; > > 1. Make sure you're not writing to a compressing tape device if you are > compressing the data. Often doing so makes things very bad. I shall check and see if that makes any difference. > 2. There is no direct parameter to setting a time for writing filemarks- all > of the calls to scsi_write_filemarks from scsi-sa.c use 60000 which you could > probably increase. But 60 seconds *ought* to be enough. So an application cannot open a sequential access device, write for awhile, do something else for > 60 seconds, and write some more? This is what is happening. afio has to pause for quite some time while compressing a large file. For example, the first ISO image that it attempts to backup on my system is over 370 MB, and takes over 13.5 minutes on a 350 MHz Pentium II to compress it. Only after this has been done does afio write again. (seems silly to me, yes, but there you are) Cheers, -- Jacques Vidrine / n@nectar.com / jvidrine@verio.net / nectar@FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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