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Xref: sserve comp.unix.msdos:1554 comp.unix.bsd:8267 comp.unix.sysv386:25850 comp.unix.xenix.misc:472 comp.unix.xenix.sco:6283 Path: sserve!manuel.anu.edu.au!munnari.oz.au!network.ucsd.edu!usc!cs.utexas.edu!sun-barr!decwrl!deccrl!news.crl.dec.com!dbased.nuo.dec.com!nntpd.lkg.dec.com!sousa.tay.dec.com!pa.dec.com!oct17.dfe.dec.com!ryn.mro4.dec.com!gidday.enet.dec.com!ashley From: ashley@gidday.enet.dec.com (STEPHEN ASHLEY) Newsgroups: comp.unix.msdos,comp.unix.bsd,comp.unix.sysv386,comp.unix.xenix.misc,comp.unix.xenix.sco,unix-pc.general,comp.unix.pc-clone.32bi Subject: Re: HELP! problem with tar PC <-> SUN Message-ID: <1992Nov23.091447.17089@ryn.mro4.dec.com> Date: 24 Nov 92 01:57:15 GMT References: <BxJ7qx.2An@avalon.nwc.navy.mil> Sender: news@ryn.mro4.dec.com (USENET News System) Organization: Digital Equipment Corporation Lines: 18 >Here's the problem: there appears to be a 10x differential in the blocking >factor used by the Sun and the PC's. If a tape is written on the Sun with >a blocking fator of 2, the PC reads it as a blocking factor of 20. Both >"say" they are writing with block size=512 and blocking factor=20 by >default, but the evidence shows this to be wrong. The Sun at least is smart >enough to recognize the different blocking factor when reading the tape >and has no trouble. The PC, however, has to be told, and this is where the >*REAL* problem comes in: I dont know if this your problem or not, but here it is then. If have been told (Sun tec support Oz) that Sun OS does not support Helical Scan tape drives that use hardware based compression. As I said this is probable not your fault, but what the heek. Stephen Ashley, Alice Springs Out Back Oz.