From owner-freebsd-hackers Wed Apr 7 9:28:30 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.102]) by hub.freebsd.org (Postfix) with ESMTP id 3593B14D59 for ; Wed, 7 Apr 1999 09:28:18 -0700 (PDT) (envelope-from Don_Esry-FDE005@email.mot.com) Received: [from mothost.mot.com (mothost.mot.com [129.188.137.101]) by motgate2.mot.com (MOT-motgate2 1.0) with ESMTP id LAA09261 for ; Wed, 7 Apr 1999 11:27:44 -0500 (CDT)] Received: [from fl19exbh01.paging.mot.com (fl19exbh01.paging.mot.com [199.3.38.45]) by mothost.mot.com (MOT-mothost 2.0) with ESMTP id LAA16014 for ; Wed, 7 Apr 1999 11:26:16 -0500 (CDT)] Received: by fl19exbh01.paging.mot.com with Internet Mail Service (5.5.2417.0) id ; Wed, 7 Apr 1999 12:26:16 -0400 Message-ID: <681FCF3A6828D211A37F00A0C9992A2101880FFE@fl19exch01.paging.mot.com> From: Esry Don-FDE005 To: "'Daniel C. Sobral'" , Greg Lehey Cc: Ollivier Robert , FreeBSD Hackers Subject: RE: Separate boot partition? Date: Wed, 7 Apr 1999 12:26:10 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2417.0) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I believe that IBM, HP, and Sun all buy their LVM from Veritous. Hopefully I am close enough in spelling that you can figure it out. :-) -----Original Message----- From: Daniel C. Sobral [mailto:dcs@newsguy.com] Sent: Wednesday, April 07, 1999 5:49 AM To: Greg Lehey Cc: Ollivier Robert; FreeBSD Hackers Subject: Re: Separate boot partition? 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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message