[linux-lvm] Manegeability with LVM

Austin Gonyou austin at coremetrics.com
Mon Mar 4 18:33:01 UTC 2002

XFS does support shriking..but not with LVM. 

On Mon, 2002-03-04 at 16:34, José Luis Domingo López wrote:
> On Monday, 04 March 2002, at 23:00:10 +0100,
> Anders Widman wrote:
> > As my need for diskspace increases all the time I was thinking of
> > using LVM so I could make use of all diskspace and grow/shrink/replace
> > drives as I need to.
> > 
> Take into account that there are filesystem that by design doesn't
> support shrinking of filessytems (e.g. XFS). Some others allow you to
> both grow and shrink filesystems, but sometimes you will have to unmount
> the filesystem before modifying its size.
> On the LVM part, it was designed to allow growing and reducing LV sizes
> without being necessary to put your machine in some "maintenance" state.
> > The only downside to this is the possibility of massive dataloss if I
> > loose any of the 14 disks (drive fails to spin etc...). Would it be
> > possible to setup up a software redundancy like RAID5 with LVM so I
> > can keep this manageability LVM gives me?
> > 
> Remember, nothing except regular _and_ verified backups of your valuable
> data can guarantee that your data will survive a hardware _or_ software
> error. I'm am not sure what I fear most, a damaged disk or a severe 
> filesystem corruption. Some RAID levels give you additional hardware
> failure protection, but other levels increase your chances of lossing
> data. LVM can be seen as some sort of linear-RAID, and as such, usually
> increases the probability of a broken disk destroying your data.
> In other words, backups are (and will always be) the way to go.
> -- 
> José Luis Domingo López
> Linux Registered User #189436     Debian Linux Woody (Linux
> 2.4.18-rc4aa1)
> jdomingo AT internautas DOT org   =>  Spam at your own risk
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Austin Gonyou
Systems Architect, CCNA
Coremetrics, Inc.
Phone: 512-698-7250
email: austin at coremetrics.com

"It is the part of a good shepherd to shear his flock, not to skin it."
Latin Proverb

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