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New drive [Solved]
Posted: Thu Nov 24, 2005 4:27 pm
by josh
I am trying to add a new drive to my fedora core 4 box, before I added it I had 2 X 400Gb SATA drives (NON-Raid).
From what it looks like fedora automatically detected the first 2 drives while I was installing it, and mounted them both as a logical volume on /
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[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
721G 1.3G 683G 1% /
/dev/sda1 99M 15M 79M 16% /boot
/dev/shm 245M 0 245M 0% /dev/shm
Here is the new disk I just installed and used fdisk to partition
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Disk /dev/sdc: 400.0 GB, 400088457216 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 48641 390708801 83 Linux
df is still showing root ( / ) to be 800 Gbs, but I have now 1.2TR of drives in the box, I'm guessing I have to do something to mount it or add it to LVM
Please be nice I'm new at this

Posted: Thu Nov 24, 2005 6:01 pm
by pickle
I've never done this myself, but I talked with a co-worker about this very topic this morning. He said that ya, you have to mount the drives. You also need to put a line in the startup script that will mount it at every boot.
Posted: Thu Nov 24, 2005 6:30 pm
by Chris Corbyn
You need to edit /etc/fstab to include that drive. I could talk you through it but if you open the file and do some copying & pasting with a bit of editting you'll get it. That's to mount the drive at startup among a handful of other less important things.
You could just mount it while the OS is running by running the following but it won't stick after reboot:
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mkdir /mnt/new-drive #optional
mount /dev/sdc1 /mnt/new-drive #try just /dev/sdc if that fails
df -h #Yippee... new drive :)
If you need help editting you fstab just ask
EDIT | Doh! Mis-understood you sorry. You want to just *add* it to the existing space on / ? Never done that sorry

Posted: Thu Nov 24, 2005 8:14 pm
by josh
d11wtq wrote:EDIT | Doh! Mis-understood you sorry. You want to just *add* it to the existing space on / ? Never done that sorry

Yeah, I did some googling and it looks like I need to use something called LVM, I found the docs but I'm stuck
Heres my physical volumes
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[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name VolGroup00
PV Size 372.50 GB / not usable 0
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 11920
Free PE 0
Allocated PE 11920
PV UUID 1NQ7gW-Zk56-2C1v-Xvy1-Vhxw-ckXt-Y6kmoe
--- Physical volume ---
PV Name /dev/sdb1
VG Name VolGroup00
PV Size 372.59 GB / not usable 0
Allocatable yes
PE Size (KByte) 32768
Total PE 11923
Free PE 2
Allocated PE 11921
PV UUID VjnV3a-Bo1a-q3xw-ddyr-24hN-ey8F-50K6Va
--- Physical volume ---
PV Name /dev/sdc1
VG Name VolGroup00
PV Size 372.59 GB / not usable 0
Allocatable yes
PE Size (KByte) 32768
Total PE 11923
Free PE 11923
Allocated PE 0
PV UUID qMP8Vy-sqN0-P6WL-Ck82-4Fl4-9yJi-92XD8C
But my third disk got added to the wrong logical volume it looks like
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[root@localhost ~]# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 64tpc9-uVNH-qG9w-tf2p-jJjw-ZlaS-76PM0m
LV Write Access read/write
LV Status available
# open 1
LV Size 744.06 GB
Current LE 23810
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:0
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID 5DWUAN-1EFX-VqST-MV6w-Or2v-lHhs-hsXoW3
LV Write Access read/write
LV Status available
# open 1
LV Size 992.00 MB
Current LE 31
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:1
Here's the documentation I've been going by
http://www.tldp.org/HOWTO/LVM-HOWTO/index.html
I was trying to
extend my volume
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[root@localhost ~]# lvextend -L+400G /dev/VolGroup00/LogVol00
Extending logical volume LogVol00 to 1.12 TB
Insufficient allocatable logical extents (35735) for logical volume LogVol00: 36610 required
It looks like it's trying to take it from somewhere other then my third drive, if anyone could shed a little light as to what I did / am doing wrong it'd be much appreciated.
EDIT Solved the issue thanks to
this very informative tutorial
Edit: Maybe not, I thought it was becase
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[root@localhost ~]# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 64tpc9-uVNH-qG9w-tf2p-jJjw-ZlaS-76PM0m
LV Write Access read/write
LV Status available
# open 1
LV Size 1.09 TB
Current LE 35714
Segments 4
Allocation inherit
Read ahead sectors 0
Block device 253:0
but df -h shows a size of 721GB still
Triple edit: 4 hours of google turned up
http://forums.teamphoenixrising.net/sho ... hp?t=32150 which did the trick!!!
Posted: Fri Nov 25, 2005 6:36 am
by Chris Corbyn
Sweet. I'll have to play around with this. I'm curious what happens if one drive fails? You just have less space or does it cuase major issues once you've started saving stuff on all drives?
Posted: Fri Nov 25, 2005 9:11 am
by josh
d11wtq wrote:major issues