Hard disk added but not recognized by the Os (RHEL4)

[Max Fontana]

Hi!
I've recently added a fourth Scsi Hard disk to my
Proliant ML350 configured as follow :
SmartArray Controller 641 with 3 72Gb Scsi h.disks.(raid5)
I installed on my RHEL4 the HP Array configuration Utility and did the following steps:
1) Expanded my array
2) Expanded my logical Volume
Everything ok . Now I can see 4 physical drives
and a new total space increased of 72gb(obviously..)
The problem is that the operating system seems not to recognize the new free space . I come from Windows's world and Linux is a completely new territory to explore for me so....would you be so kind to tell me what I should do in order to see these added 72Gbs?? many many thanks in advance.
Max (Italy)

[Stuart Browne]

So 'fdisk' etc. aren't reporting the new disk size, right..

What you ned to do is tell the RAID controller to re-read the disk sizes.

You should be able to do the following to get it done:

echo "rescan" > /proc/scsi/cciss0/1

Have a read through the kernel documentation's "cciss.txt".

Failing that, a reboot'll do it.

[Max Fontana]

I didn't try the command you suggested but I rebooted the server immediately after the expansion process but with no luck :-( .
Any other suggestion ?
Thanks again!
max

[Max Fontana]

Maybe should I use the lvextend command? If I type lvdisplay , here is what I get :
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 0QlVVm-W4ZY-tSLv-syu6-qS6J-b2u9-2Ed13l
LV Write Access read/write
LV Status available
# open 1
LV Size 133,56 GB
Current LE 4274
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
What should be the correct syntax to use with the lvextend command ?

[Ivan Ferreira]

Does fdisk -l reports the new disk size?

The filesystem won't report the new disk size until you extend the file system, but first, the physical disk (fdisk -l) should report the rigth size.

Also, would be interesting the output of fdisk -l and df -h.

[Max Fontana]

This is what I see typing fdisk -l
Disk /dev/cciss/c0d0: 218.5 GB, 218501038080 bytes
255 heads, 63 sectors/track, 26564 cylinders
Units = cilindri of 16065 * 512 = 8225280 bytes

Dispositivo Boot Start End Blocks Id System
/dev/cciss/c0d0p1 * 1 13 104391 83 Linux
/dev/cciss/c0d0p2 14 17709 142143120 8e Linux LVM
The disk size seems to be corrextly recognized..

[Max Fontana]

I forgot the output of df -h

/dev/mapper/VolGroup00-LogVol00
132G 33G 93G 26% /
/dev/cciss/c0d0p1 99M 19M 75M 20% /boot
none 1014M 0 1014M 0% /dev/shm
....still wrong :-//

[Ivan Ferreira]

Please also post the output of:

pvdisplay
vgdisplay -v

You may need to use pvresize to extend the physical disk. But there is a problem:

# pvresize
Command not implemented yet.

So, you may need to destroy, recreate the vg, and restore the data!!!!

[Max Fontana]

[root@mail init.d]# pvdisplay
--- Physical volume ---
PV Name /dev/cciss/c0d0p2
VG Name VolGroup00
PV Size 135,53 GB / not usable 0
Allocatable yes
PE Size (KByte) 32768
Total PE 4337
Free PE 1
Allocated PE 4336
PV UUID XAEWQR-s1qj-Cj5K-gv0W-9ndt-lroN-35ZvNE
..........
[root@mail init.d]# vgdisplay -v
Finding all volume groups
Finding volume group "VolGroup00"
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 135,53 GB
PE Size 32,00 MB
Total PE 4337
Alloc PE / Size 4336 / 135,50 GB
Free PE / Size 1 / 32,00 MB
VG UUID hVHrwV-Dt53-wbGa-ZwHQ-ZWcX-t5Tm-vQIVUu

--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 0QlVVm-W4ZY-tSLv-syu6-qS6J-b2u9-2Ed13l
LV Write Access read/write
LV Status available
# open 1
LV Size 133,56 GB
Current LE 4274
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0

--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID Apww83-TFLq-KqM9-zwEt-zPAW-a3J8-EPP8j7
LV Write Access read/write
LV Status available
# open 1
LV Size 1,94 GB
Current LE 62
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:1

--- Physical volumes ---
PV Name /dev/cciss/c0d0p2
PV UUID XAEWQR-s1qj-Cj5K-gv0W-9ndt-lroN-35ZvNE
PV Status allocatable
Total PE / Free PE 4337 / 1

Waiting for your precious info's....
many thanks !