LVM *was* Re: [mythtv-users] Highest number of simultaneous streams recorded?

Alex Brekken brekkal at
Fri Oct 14 16:45:16 EDT 2005

If one wanted redundancy only (is that RAID-0??) then I take it you would
skip LVM entirely, correct? - IOW, are the 2 mutually exclusive or can you
use LVM with RAID? The reason I ask is because I'm starting to put together
some plans to build a master backend server (currently I have a
frontend/backend combo) which will not only house myth and it's recordings,
but also all of my music and pictures/videos of the kids. (the latter of
which I would want the redundancy in case of a drive failure).

On 10/14/05, Steve Adeff <adeffs at> wrote:
> On Friday 14 October 2005 16:13, Brandon Beattie wrote:
> >
> > Before you go running off let me give you a warning. Although LVM
> > supports striping, adding/removing disks, shrinking and growing fs's,
> > they do _not_ all work together. If you stripe you can't add/remove
> > disks or change fs size. If you use xfs or jfs you can't shrink a
> > fs. After using Raid 0, 1, 5, LVM on 6 disks with XFS, JFS, and Reiser
> > I have settled with only LVM and ReiserFS (As much as I dislike Reiser
> > for performance downsides with many gig files compared to xfs and jfs).
> > In my experience, raid 5 is overkill for my desire to record TV shows.
> > Anything I want safe I backup to another computer completely. In
> > dealing with 6 drives I've found it very useful to shrink fs's at times,
> > and since ReiserFS (Not Reiser 4) is the only fs that supports shrinking
> > I use it. Striping would be nice, but adding/removing disks I've found
> > to be a much better feature.
> >
> > I've also found seagate drives to run 10%-30% faster for reading and
> > writing (reading and writing 100+ gig files) plus the 5yr warranty comes
> > in nice, since of 9 drives I've had in the last 3 years, half the Maxtor
> > 200GB drives have gone bad.
> Thanks for the info!
> I'll keep all that in mind. I might just stick with a RAID 0 for my
> recording
> drive and leave backup to the LVM or plain filesystem or something...
> I'm looking at getting WD's w/ 3yr warranty's. I've had very good luck
> with
> them (and seagate as well) and they're about $40 less for 320gb than the
> seagates, which I can live with, since in 3 years time I plan on having
> 1TB
> drives ;-) (or something much larger than my current drives).
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