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Old 08-21-2006, 05:37 AM   #1
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Core 5, 2.2Terabytes not working with LVM or File System

Good Morning All.

Hoping someone may be able to shed some light on this...

I have a new server, Dell Power Edge 2900 which i have set up with five 750gig SATA drives. They are hardware Raided with the MegaRaid card provided by Dell. Its setup as RAID 5, so there is 2.2 Terabytes of usable storage.

The RAID card see's all drives and registers them as the correct sizes. When Fedora is Installed on the box, using Fdisk, it is possible to see the full 2.2T of usable storage. You are able to partition the drives etc with no problems. Using the fdisk -l command, shows everything as you would expect. However when you mount the drive to the OS, it only see's 744gig???

LVM is a similar story, it sees the full size of only one drive.

Fedora is fully updated, also tried this with Redhat 4 Update 4 and no joy.

Any suggestions welcomed.


Old 08-22-2006, 02:30 PM   #2
Registered: Jul 2003
Location: Miami, Florida, USA
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Run the command:

df -h

to see if it reports the correct mount size.

Make sure that the MegaRAID module is loaded with command:

lsmod | sort

Look for megaraid or megaraid.ko. If it doesn't appear to be loaded then load it with the command:

modprobe megaraid

then run:

lsmod | sort

again to make sure it does load.
Old 09-05-2006, 12:21 PM   #3
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Thanks for the help

It was a bit of a nightmare and appeared to be effected by the 2TB limit, even although the Kernel is the latest and i think it was just trying to throw me off the the 744gig thing!

Anyway managed to get round it by adding one more disk and spliting it in to two RAID 5's with 1.3T usable each. Then used the LVM to bring them both together. I am not entirley happy with it as it is a bit of a bodge and we are loosing 1.4T of storage throught redundancey! But hey it works!

Tell you what, this system has been a bit of nightmare to get running right!




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