Date: Fri, 3 May 1996 00:07:03 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org (FreeBSD hackers) Cc: wilko@yedi.iaf.nl (Wilko Bulte) Subject: Re: using DLT drive on FreeBSD Message-ID: <199605022207.AAA15521@uriah.heep.sax.de> In-Reply-To: <199605021801.UAA01622@yedi.iaf.nl> from Wilko Bulte at "May 2, 96 08:01:19 pm"
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As Wilko Bulte wrote: > I think the 2.1R limit is 32kbytes. In the recent past there was a > discussion about this on this list (in relation to DAT drives??). 64 KB, this is enforced by physio(9) [man page not yet written :)]. Many SCSI adapters do only allow for 16 scatter/gather segments, and in the worst case, you need one of them for each physical page. (Well, i think that's what kept in my mind from the previous discussion.) Changing this will require a larger rework, or perhaps bounce buffers. ;) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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