Expanding a Perc5i Raid5

[Hansjörg Maurer]

Hi

I have been trying to expand a Raid5 Logical Drive attached to a Perc5i
controller (RHEL5 x84_64).
The Logical Drive initially contains 3 750 GByte Sata disks (1.5 TByte size)
I added an additional 750 GByte disk and extended the Logical Drive on
this Disk using OMSA
It works fine, and after 25h I had a 2.25 TByte Logical Drive.

fdisk still only sees the 1.5 TByte, until I restarted the system.
Is it possible to reread the new Logical Drive size during runtime
(blockdev --rereadpt  did not work)?


After the repoot, fdisk sees the new size.
I had three partitions on the device (sda1-sda3)
If I try to add an additional partition, I have only been able to add
one with a size of 0 block.
It seems that the new blocks can not be accessed by a partition tool
(tried fdisk, sfdisk, parted).

Could it be a problem, that the new device nowis bigger then 2 TByte?
I thought, that it should be possible to add a partition up to 2 TByte,
but I can not add  even a small partition.
 
If the device is now bigger then 2 TByte , is there a way to relabel it
as GPT in oder to use the whole space without loosing the existing
partitions?
The device was labeld as dos during the installation...

Regards


hansjörg



-- 
_________________________________________________________________

Deutsches Zentrum fuer Luft- und Raumfahrt e.V.
in der Helmholtz-Gemeinschaft

Institut fuer Robotik und Mechatronik

Dr. Hansjörg Maurer

LAN- und Systemmanager

Münchner Strasse 20
82234 Wessling
Germany 

Telefon: 08153/28-2431 
Telefax: 08153/28-1134

E-Mail: Hansjoerg.Maurer at dlr.de
Internet: http://www.robotic.dlr.de/

__________________________________________________________________


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