Date: Thu, 30 May 1996 22:25:36 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-scsi@freebsd.org Cc: wilko@yedi.iaf.nl Subject: Re: removing 32 kbyte limit from dump Message-ID: <199605302025.WAA23103@uriah.heep.sax.de> In-Reply-To: <199605301219.WAA19690@godzilla.zeta.org.au> from Bruce Evans at "May 30, 96 10:19:02 pm"
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As Bruce Evans wrote: > Similar problems probably affect cd and worm devices. An i/o of > 100 * 2352 byte blocks would be mutilated at 64K boundaries. This > can be fixed using the current physio() interface: don't use rawread()/ > rawwrite(), and provided a minphys() function that returns > (MAXPHYS / 2352) * 2352 (it must be <= MAXPHYS because physio() > uses min(MAXPHYS, minphys()). This still leaves the problem of not being able to read an SGI-written tape with 256 KB blocking. :( -- 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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