Date: Tue, 24 Dec 1996 08:47:35 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-current@FreeBSD.org (FreeBSD-current users) Cc: cg@archimedia.khs-linz.ac.at Subject: Re: DAT: reading with blocksize=256K Message-ID: <199612240747.IAA10234@uriah.heep.sax.de> In-Reply-To: <Pine.BSF.3.91.961224002318.181A-100000@spock.my.domain> from Christian Gusenbauer at "Dec 24, 96 00:28:31 am"
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As Christian Gusenbauer wrote: > I just got a DAT cartridge with a tar backup. It seems that the backup > was made with a blocksize of 256K. Isn't it possible to get the data into > my pc with current (it looks like there's a limit of 64K)?? This has been discussed at lenth already: it's currently limited by physio(9) to chunks of at most 64 KB size, due to the limitations in the scatter/gather list of some SCSI controllers that don't allow for more than 16 scatter/gather segments. A better scheme needs to be worked out. Right now, you gotta tell your friends at the SGI machine (i bet that's where your tape came from, they are the only system with such a braindead default) to write with a better suited blocksize, like the 10 KB that tar(1) defaults to on any other system in the world. -- 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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