Date: Sat, 3 Apr 1999 15:02:16 -0500 From: Simon Shapiro <shimon@Simon-Shapiro.ORG> To: Doug Rabson <dfr@nlsystems.com> Cc: freebsd-alpha@freebsd.org Subject: Re: disklabel Message-ID: <9904031503150Q.22286@nomis.simon-shapiro.org> References: <Pine.BSF.4.05.9904031029180.65636-100000@herring.nlsystems.com>
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On Sat, 03 Apr 1999, Doug Rabson wrote: >On Fri, 2 Apr 1999, Simon Shapiro wrote: > >> Is it my imagination or lack of attention, or a problem? >> >> It appears that if I disklabel a drive on a PC, the label will not be >> visible on an Alpha? >> >> Why do that? Linux fdisk (on the alpha) is a bit broken, so I thought >> to disklabel on a PC and move the disks. No cigar. >> >> So, either this is the case, or the two are so incompatible that they >> write/read totally different areas on the disk. >> >> BTW, Linux thinks that there is partition 4 on the disks. fdisk on the >> FreeBSD-i386 side confirms that. >> >> Yes, I followed the handbook guide and wiped out the first megabyte of >> /dev/da16, then disklable -Br, etc. No cigar. > >The disklabel lives in different places on the two architectures. For >i386, it is at block 1, offset 0 and for alpha it is at block 0, offset >64. This is mainly for compatibility with OSF1 and NetBSD but it makes >some kind of sense since the first block isn't cluttered up with >executable code on the alpha. > >To add to the fun, disklabel -Br does completely different things on the >alpha (like installing alpha executables instead of i386 ones...). Figured as much :-) Question still remains how to make a diskpack compatible between the two? There are several uses to this, clustering being not the least of them. Sincerely, Simon Shapiro Research Fellow ShapiroS@MindSpring.com MindSpring Enterprises, Inc. 404.815.0770 ext. 2057 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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