*BSD News Article 59885


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From: fwp@Jester.CC.MsState.Edu (Frank Peters)
Newsgroups: comp.unix.bsd.netbsd.misc,comp.unix.bsd.bsdi.misc,comp.unix.solaris,comp.unix.aix
Subject: Re: ISP hardware/software choices (performance comparison)
Date: 17 Jan 1996 14:03:32 -0600
Organization: Mississippi State University
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Distribution: inet
Message-ID: <4djkmk$m9b@Jester.CC.MsState.Edu>
References: <4cmopu$d35@vixen.cso.uiuc.edu> <4dh4kc$rnv@park.uvsc.edu> <4di4dc$je@microl4.microlise.UUCP> <4di4qa$jf@microl4.microlise.UUCP>
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According to Andrew Gierth <andrewg@microlise.co.uk>:
> Assuming that hardware can be hot-swapped, it is (I think) possible
> with AIX to install an entirely new disk device (for example), for
> which drivers were not previously on the system, load the necessary
> drivers, configure the new device, migrate logical volumes from
> existing disks to the new device, take the old disks offline, remove
> their drivers (if appropriate), ALL WITHOUT DISTURBING THE USERS!
> [And without requiring any additional software!]

You need disksuite to get logical volumes.  This is part of ther server
software package so its included on most systems that are likely to
need it.

With that proviso, yes you can do this.  I'm not sure I would recommend
it but it can be done.