System Administration

Re: How to check hardware raid on Redhat ES

 
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Ratzie
Super Advisor

How to check hardware raid on Redhat ES

We have a Dell poweredge 2850 with Hardware RAID

If I was not the one that installed the server I would not know if it was raided or not.

What commands are there to view the Hardware raid?

How would I know?

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Rick Garland
Honored Contributor

Re: How to check hardware raid on Redhat ES

There are several RAID types of HW/SW and drivers that are in use. There are several methods available depending on the HW/SW/drivers in use.

Couple of examples; acaraid & megaraid & megaraid2

What HW and/or drivers are in the system? Can use ther 'lshw' utility to see HW and 'lsmod' to see your modules loaded in kernel. (lshw is a download tool).

There are some provided with GUI tools as well.

Check out the following site.
http://developer.skolelinux.no/info/prosjektet/delprosjekt/hw-raid-info.html
Ivan Ferreira
Honored Contributor

Re: How to check hardware raid on Redhat ES

You need a software provided by the manufacturer. HP provides the array configuration utility, so Dell should provide something similar.

Check the download page in the Dell site, for your Hardware model.

Otherwise, I think that a bootable CD or adapter BIOS is available to configure the RAID. If you want to know the configuration, you can do it "offline".
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Ivan Ferreira
Honored Contributor

Re: How to check hardware raid on Redhat ES

Also, you could more or less predict if you have hardware by listing the size of the disks, using fdisk -l.

In a RAID 1, you will have half of the total disk capacity available.

In a RAID 5, you will have N-1 disks capacity available.

And so on.

You should also consider that maybe there is a spare disk, that disk should not have activity, you can see it in the leds.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Dave Falloon
Trusted Contributor
Solution

Re: How to check hardware raid on Redhat ES

Go to dell's linux page:

http://linux.dell.com/storage.shtml

And follow the instructions.

--Dave
Clothes make the man, Naked people have little to no effect on society
Ratzie
Super Advisor

Re: How to check hardware raid on Redhat ES

We have megaraid2 installed. And I have found some files that state the raid config.

In /proc/megaraid/hba0
Give you alittle, but is there an acutal probe, or some command line utilities?
Rick Garland
Honored Contributor

Re: How to check hardware raid on Redhat ES

I believe this is Dell hardware - a PowerEdge server?

If so, Dell would have some utilities