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+ <H1>[Mageia-dev] time to switch from raw partitions to lvm?</H1>
+ <B>Buchan Milne</B>
+ <A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20time%20to%20switch%20from%20raw%20partitions%20to%20lvm%3F&In-Reply-To=%3C201102212238.08891.bgmilne%40staff.telkomsa.net%3E"
+ TITLE="[Mageia-dev] time to switch from raw partitions to lvm?">bgmilne at staff.telkomsa.net
+ </A><BR>
+ <I>Mon Feb 21 21:38:07 CET 2011</I>
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+<PRE>On Monday, 21 February 2011 18:56:22 Jeff Robins wrote:
+&gt;<i> &gt; Michael Scherer wrote:
+</I>&gt;<i> &gt; &gt; For a linux system, a lvm logical volume is just another disk.
+</I>&gt;<i>
+</I>&gt;<i> I've had issues in the past because Linux considered LVM just one logical
+</I>&gt;<i> disk and I think the average user would eventually have the same problem as
+</I>&gt;<i> well. I think moving to LVM as the default will create too many complaints
+</I>&gt;<i> and support requests in the end.
+</I>&gt;<i>
+</I>&gt;<i> A long time ago I had a system with 6 SCSI disks, each 1.2GB. The system
+</I>&gt;<i> was fairly useless with the single disks, but using LVM I had 1 disk of
+</I>&gt;<i> reasonable size. I ran the system for about a year with no problems, but
+</I>&gt;<i> then 1 of the disks failed. Normally this would be a medium inconvenience,
+</I>&gt;<i> because I would just have to restore the files from that one drive to
+</I>&gt;<i> another drive. However, with the LVM,
+</I>
+... or RAID0 ...
+
+&gt;<i> I lost the ability to read the entire
+</I>&gt;<i> LVM.
+</I>
+VG.
+
+&gt;<i> I had to restore the entire system, which was a much bigger pain. I
+</I>&gt;<i> also could not obtain a disk of the same small size for a reasonable price,
+</I>&gt;<i> which I was told would make the problem even bigger.
+</I>
+Irrelevant for LVM. Only partly relevant for RAID0.
+
+&gt;<i> If I had used some redundancy, then I might have been able to restore the
+</I>&gt;<i> one disk, but I was a novice user and didn't understand the need. I think
+</I>&gt;<i> that most users who use the defaults and probably novice users, or at least
+</I>&gt;<i> will be after Mageia takes off. I think LVM support is a must, but I think
+</I>&gt;<i> making it the default, without also making some redundancy the default,
+</I>&gt;<i> will cause more problems than it solves.
+</I>
+For single-disk systems, there is no difference.
+
+For multi-disk systems, whether it would have been any different depends on
+whether you had a single VG or multiple VGs.
+
+But, by the time you talk about 6 disks, we're not talking about a default
+anymore.
+
+Regards,
+Buchan
+</PRE>
+
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