Date: Tue, 29 Sep 1998 22:39:11 -0500 From: Karl Denninger <karl@Denninger.Net> To: stox@enteract.com, hackers@FreeBSD.ORG Subject: Re: Exabyte 8500 in low density (2GB) mode... How? Message-ID: <19980929223911.A2555@Denninger.Net> In-Reply-To: <Pine.BSF.3.96.980929220050.893B-100000@m4.stox.sa.enteract.com>; from Kenneth P. Stox on Tue, Sep 29, 1998 at 10:08:51PM -0500 References: <19980929142441.A1359@Denninger.Net> <Pine.BSF.3.96.980929220050.893B-100000@m4.stox.sa.enteract.com>
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On Tue, Sep 29, 1998 at 10:08:51PM -0500, Kenneth P. Stox wrote: > > On Tue, 29 Sep 1998, Karl Denninger wrote: > > > I don't believe an 8500 CAN write 8200 format. > > > > It can READ 8200 format, but not write it. There are differences in track > > density and head gap size, and as such I don't believe this is even > > physically possible. > > An 8500 can write in 8200 density just fine. Reliably reading that tape on > an 8200 is another question entirely. The 8500 writes a far narrower track > than the 8200. > > Although this represents a challenge, it is not impossible. If the tape > has never been used on an 8200, and then written on the 8500, chances are > it will work. However, if the tape had previously been written on an 8200, > the 8500 will never completely erase the data left in the wider tracks by > the 8200. When this tape is then written on the 8500 ( in 8200 density ) > and mounted on an 8200, the 8200 can become confused by the "old" data > left on the outside of the narrower tracks. > > -Ken Stox > stox@enteract.com > stox@fnal.gov In other words: Bulk erase the tape, write it, and then immediately read it on the 8200. That's what I thought. Interchange was a problem. -- -- Karl Denninger (karl@denninger.net) http://www.mcs.net/~karl I ain't even *authorized* to speak for anyone other than myself, so give up now on trying to associate my words with any particular organization. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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