[NBLUG/talk] Fedora 3 and lvm2

[Todd Cary]

Got an answer(s) to my question: yes, the two disks are combined into 
one virtual disk with the LVM system and the allocation of disk space is 
dynamic.  Here is a thread with some references as well as explanations: 
http://forums.fedoraforum.org/showthread.php?p=253833

Todd

Todd Cary wrote:

> In a prior post I referred to mounting a second HD to my system under 
> the new HAL system.  After snooping around other forums and using 
> Google, I have increased my understanding somewhat about Fedora 3 and 
> it's file system management, yet in no way am I confortable with 
> understanding what is really going on.  Here is what I have found out 
> so far:
>
> * The file system is managed by lvm2 (Logical Volume Manager) which 
> creates LVM entries.
>
> * #mount displays
>
> # This file is edited by fstab-sync - see 'man fstab-sync' for details
> /dev/VolGroup00/LogVol00 /                       ext3    
> defaults        1 1
> LABEL=/boot             /boot                   ext3    
> defaults        1 2
> none                    /dev/pts                devpts  
> gid=5,mode=620  0 0
> none                    /dev/shm                tmpfs   
> defaults        0 0
> none                    /proc                   proc    
> defaults        0 0
> none                    /sys                    sysfs   
> defaults        0 0
> /dev/VolGroup00/LogVol01 swap                    swap    
> defaults        0 0
> /dev/hdc                /media/cdrom            auto    
> pamconsole,exec,noauto,managed 0 0
> /dev/fd0                /media/floppy           auto    
> pamconsole,exec,noauto,managed 0 0
>
> * #fdisk -l displays
>
> Disk /dev/hda: 81.9 GB, 81964302336 bytes
> 255 heads, 63 sectors/track, 9964 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>   Device Boot      Start         End      Blocks   Id  System
> /dev/hda1   *           1          13      104391   83  Linux
> /dev/hda2              14        9964    79931407+  8e  Linux LVM
>
> Disk /dev/hdb: 40.0 GB, 40020664320 bytes
> 255 heads, 63 sectors/track, 4865 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>   Device Boot      Start         End      Blocks   Id  System
> /dev/hdb1   *           1        4865    39078081   8e  Linux LVM
>
>
> * #lvdisplay displays
>
>  --- Logical volume ---
>  LV Name                /dev/VolGroup00/LogVol00
>  VG Name                VolGroup00
>  LV UUID                obhKwl-oiML-P38I-2x64-jtdW-o0El-B8jMsW
>  LV Write Access        read/write
>  LV Status              available
>  # open                 1
>  LV Size                112.91 GB
>  Current LE             3613
>  Segments               2
>  Allocation             inherit
>  Read ahead sectors     0
>  Block device           253:0
>  
>  --- Logical volume ---
>  LV Name                /dev/VolGroup00/LogVol01
>  VG Name                VolGroup00
>  LV UUID                0VrTdl-DQIm-5qlp-gBCE-4Y4w-L9uQ-FmRS8G
>  LV Write Access        read/write
>  LV Status              available
>  # open                 1
>  LV Size                512.00 MB
>  Current LE             16
>  Segments               1
>  Allocation             inherit
>  Read ahead sectors     0
>  Block device           253:1
>  
> It appears that the LV size of 112.91 GB is the combined size of the 
> two HD's.  In other words, the LVM system has combined the hard drives 
> into one logical entry. Could this be?
>
> Does anyone on this forum have a good understanding of the LVM system 
> in Fedora 3?
>
> Todd
>
>
>
>
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