Date: Wed, 07 Apr 1999 18:49:15 +0900 From: "Daniel C. Sobral" <dcs@newsguy.com> To: Greg Lehey <grog@lemis.com> Cc: Ollivier Robert <roberto@keltia.freenix.fr>, FreeBSD Hackers <hackers@FreeBSD.ORG> Subject: Re: Separate boot partition? Message-ID: <370B2A1B.BA8877D6@newsguy.com> References: <19990407085435.M2142@lemis.com> <19990407080113.A4122@keltia.freenix.fr> <19990407155835.M2142@lemis.com>
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Greg Lehey wrote: > > > Speaking of HP, their LVM system is cool. Now, that would be a nice > > addition to vinum (please don't look at me, I'm not a FS expert). > > Well, you *could* tell me which parts are cool and why. Then you'd > have at least a hope of getting it. It's like AIX LVM... I sent you a message describing AIX LVM once. There are three features really worth in them. First, the Logical Volume is a set of Physical Volumes (VINUM does that). Second, you allocate partitions in the logical volumes through bitmaps of LPs (sectors/clusters/blocks/whatever you want to call it) instead of ranges. Third, you can increase logical volumes or partitions at any time. Then, there is the volume group stuff, which is a minor point. The problem is that the underlying filesystem would need to support dynamic size increase. BTW, I recall that you need to unmount the fs in HP-UX, while AIX supports increasing the logical volume (and underlying filesystem) without unmounting it. Anyway, if you can't increase the size of a filesystem, even having to unmount it, the other benefits of a LVM over Vinum are greatly diminished. I have worked with both, and AIX one is much superior. -- Daniel C. Sobral (8-DCS) dcs@newsguy.com dcs@freebsd.org "nothing better than the ability to perform cunning linguistics" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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