Date: Thu, 8 Apr 1999 09:54:49 +0930 From: Greg Lehey <grog@lemis.com> To: Keith Stevenson <k.stevenson@louisville.edu>, freebsd-hackers@FreeBSD.ORG Subject: Re: Separate boot partition? Message-ID: <19990408095449.F2142@lemis.com> In-Reply-To: <19990407081448.A28786@homer.louisville.edu>; from Keith Stevenson on Wed, Apr 07, 1999 at 08:14:48AM -0400 References: <19990407085435.M2142@lemis.com> <19990407080113.A4122@keltia.freenix.fr> <19990407155835.M2142@lemis.com> <19990407081448.A28786@homer.louisville.edu>
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On Wednesday, 7 April 1999 at 8:14:48 -0400, Keith Stevenson wrote: > On Wed, Apr 07, 1999 at 03:58:35PM +0930, Greg Lehey wrote: >> On Wednesday, 7 April 1999 at 8:01:13 +0200, Ollivier Robert wrote: >>> >>> HP-UX uses a similar scheme with /stand/vmunix (and /stand/system for tuned >>> parameters). /stand is always an HFS (aka UFS) whereas all the other FS can >>> be VxFS. >> >> Right, most System Vs I know with this method call it /stand. But >> that name is taken :-) On Tandem, the boot file system is (wait for >> it) bfs. It's the most stupid file system I've seen yet, but it makes >> it easier for the bootstrap to find the kernel. > > With LVM on AIX, the boot "device" isn't even mounted at run time. If you do > anything with the root LVM configuration, you have to update the system boot > blocks, but otherwise you'd never know that the boot device even exists. > In the case of an extended vinum, would it even be necessary for the boot > device to be mounted after the system is running? No. That's the whole point. The boot partition does not run under Vinum, so it's not failure-tolerant. If we needed it, it would be a weak point in the implementation. > As for the various commercial LVMs, I've used LVM under both HPUX > and AIX. In my opinion, AIX's implementation is far superior. The > ability to increase the size of a mounted filesystem is extremely > powerful. This is theoretically possible in Vinum as well; we just need to modify ufs to understand it's in a bigger volume. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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