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I am in the middle of a RHEL5 installation on a DELL PE1800. I am trying to make the partition table. I have 6 hdd's of 1TB each. Because of the restraints of my RAID card (Cerc), I cannot use them all and make one big RAID5, so I have two RAID volumes called <br />
Arr012 (made up of HDs 0, 1, and 2 in a RAID5 configuration) <br />
and Arr345 (HDs 3, 4, and 5 in RAID 5).<br />
<br />
I have made my /boot and /tmp partitions, and now I want to make my LVM physical volumes, so I select:<br />
File System Type: physical volume (LVM)<br />
Allowable Drives: sda 1906683 MB CERC Arr012<br />
<br />
and for size, I have tried fixed sizes and &quot;Fill to maximum allowable size,&quot; but I get:<br />
Partitions of type 'physical volume (LVM) must be constrained to a single drive. This is done by selecting the drive in the 'Allowable Drives' checklist.<br />
<br />
Now, does this mean that you cannot use LVM on a RAID? I thought that the RAID, being hardware RAID, would be seen as a regular disk from the operating system. That does not seem to be the case, because it won't let me create an LVM physical volume.<br />

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I am in the middle of a RHEL5 installation on a DELL PE1800. I am trying to make the partition table. I have 6 hdd's of 1TB each. Because of the restraints of my RAID card (Cerc), I cannot use them all and make one big RAID5, so I have two RAID volumes called 
Arr012 (made up of HDs 0, 1, and 2 in a RAID5 configuration) 
and Arr345 (HDs 3, 4, and 5 in RAID 5).

I have made my /boot and /tmp partitions, and now I want to make my LVM physical volumes, so I select:
File System Type: physical volume (LVM)
Allowable Drives: sda 1906683 MB CERC Arr012

and for size, I have tried fixed sizes and "Fill to maximum allowable size," but I get:
Partitions of type 'physical volume (LVM) must be constrained to a single drive. This is done by selecting the drive in the 'Allowable Drives' checklist.

Now, does this mean that you cannot use LVM on a RAID? I thought that the RAID, being hardware RAID, would be seen as a regular disk from the operating system. That does not seem to be the case, because it won't let me create an LVM physical volume.


How do I set up LVM on a RAID RHEL5 machine?

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