RHEL 5.5 hard drive not detected after LVM format and created Volgroup1 ?

[albertwt]

Hi All,

 

I'm having mysterious problem here with my Red Hat EL 5.5 64 bit edition,

 

I've install it on my primary hard drive 12 GB it works fine and then

I added secondary 20 GB hard drive (sdb1) into this system and then format it as VolGroup01 see the attachment, but how come it doesn't show up ?

 

 

[administrator@websphere02 ~]$ pwd

/home/administrator

 

[administrator@websphere02 ~]$ uname -a

Linux websphere02.domain.com 2.6.18-186.el5 #1 SMP Wed Jan 27 18:11:22 EST 201 0 x86_64 x86_64 x86_64 GNU/Linux

 

[administrator@websphere02 ~]$ df -kh

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

5.9G 2.5G 3.2G 44% /

/dev/sda1 99M 17M 78M 18% /boot

tmpfs 1.9G 0 1.9G 0% /dev/shm

 

[administrator@websphere02 ~]$ su

Password:

 

[root@websphere02 administrator]# fdisk -l

bash: fdisk: command not found

 

 

can anyone help me how to actually utilize this new capacity ?

 

Thanks,

 

Albert

[kmount]

You seem to be suffering from Red Hat's inability to configure path properly.

 

Try /sbin/fdisk -l

[albertwt]

haha you're right man, now it gets better:

 

[root@websphere02 administrator]# /sbin/fdisk -l

 

Disk /dev/sda: 12.8 GB, 12884901888 bytes

255 heads, 63 sectors/track, 1566 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

 

Device Boot Start End Blocks Id System

/dev/sda1 * 1 13 104391 83 Linux

/dev/sda2 14 1566 12474472+ 8e Linux LVM

 

Disk /dev/sdb: 21.4 GB, 21474836480 bytes

64 heads, 32 sectors/track, 20480 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

 

Device Boot Start End Blocks Id System

/dev/sdb1 1 20480 20971519+ 8e Linux LVM

[root@websphere02 administrator]#

[kmount]

Try /usr/sbin/lvdisplay and see if it shows up the one you're looking for and then mount that name somewhere.

 

--- Logical volume ---

LV Name /dev/images/5gb

VG Name images

LV UUID bgfHoe-gp1F-863h-t1uk-xSRf-drtW-Jndb2k

LV Write Access read/write

LV Status available

# open 1

LV Size 5.00 GB

Current LE 320

Segments 1

Allocation inherit

Read ahead sectors auto

- currently set to 512

Block device 253:6

 

 

mount /dev/images/5gb /mydisk

 

You might be able to do this from the gui.

Edited November 3, 2010 by kmount
added full path

[kmount]

Oh, I should have pointed out that if that complains about the filesystem type you may need to make a file system on the lvm.

 

mke2fs -j /dev/images/5gb in my case to make an ext3 fs.

 

Then it will mount.

[mister_z]

I'll try to explain as we go along, maybe you can see if a step was missed. I've been doing this for a long time, so I use the command line. Not sure how the GUI tools do this.

 

1. Install new hard drive and boot.

2. 2nd hard drive is now /dev/sdb

3. fdisk to partition the drive, probably 1 large partition like /dev/sdb1

4. pvcreate /dev/sdb1. This writes a header page into the partition that says "Hey, I'm a 'physical volume' (part of LVM), and my id is blah-blah." This pv is now available for use

5. vgcreate vgMyVgName /dev/sdb1 (substitute whatever volume group name you wish). This creates a new volume group, and assigned the newky-created partition to it. Now we have a storage pool available.

6. lvcreate --name lvMyLvName --size 10G vgMyVgName. Now we create a logical volume from some of the space in the storage pool called vgMyVgName.

7. mkfs -t ext3 -L SOME_FS_LABEL -c /dev/vgMyVgName/lvMyLvName. We are now writing the file-system metainformation in the logical volume.

8. edit /etc/fstab, add a line:

LABEL=SOME_FS_LABEL /mymountpoint ext3 defaults 0 0

depending on what mount point, options and defaults you want

9. mount /mymountpoint.

 

To add another disk partition (say /dev/sdc1) to an existing pool)

pvcreate /dev/sdc1

vgextend myVgName /dev/sdc1

 

To increase the lv size by 10 GB

lvextend --size +10G /dev/vgMyVgName/myLvName

 

To grow the ext3 file system to the full size of the newly-expanded volume

resize2fs //dev/vgMyVgName/myLvName

 

Hope this helps. See the man pages for more details. good luck.