Date: Wed, 25 Aug 1999 00:19:36 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: mikel@vintners.net Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: Is FreeBSD Alpha FS compatible with Intel? Message-ID: <199908250019.RAA09541@usr09.primenet.com> In-Reply-To: <9908242324.AA02499@slugbt.zso.dec.com> from "Mike Lempriere" at Aug 24, 99 04:24:43 pm
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> Is the FreeBSD UFS identical between platforms? More specifically, can I > use an external SCSI drive with only data, on either an Alpha or Intel > platform by merely moving the cable and powering up in the new config? The table of contents layout is different. The actual on disk structures are the same. So if you build a small module to skip the platform appropriate portion of the bootstrap, and decode the platform specific portion of the disklable, you can use them between platforms easily. This is generally most simply accomplished with a removable disk, since you can skip the boot sector stuff (assuming a "dangerously dedicated" disk), and deal only with the disklabel code. I run a JAZ disk back and forth between the two with fairly trivial hacks (WARNING: I'm usinging modified versions of Julian's SLICE code to do this, and it won't work in -current without lots of hacks, so you would probably be better off hacking your own disklabel recognition). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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