Adding RAID array

[Rules2liveby]

I have a working system with a RAID 5 array. I am adding a second array (RAID 1) on the same controller and would like to know the likely mkdev string to make use of the new array.

Would it be mkdev then 1,0,0,0

Does this sound ok?

 

[apeasecpc]

The command you want to use is "mkdev hd" then answer the prompts as you go. How you answer the prompts will depend on your controller setup.

The first prompt is the type of hard drive array you are installing, which I assume is scsi.

The second prompt is the type of controller (i.e. dpti, ad160, alad, blad, ...) Without knowing what the controller is I can't help you with this, but you may already know the answer.

The third prompt is the controller number, which will be 0 if it is the same controller as your primary array used for bootup.

The forth prompt is the bus number, which will be 0 if the new array is attached to the same bus (i.e. scsi cable) as your primary array. However if you have a controller with more than one bus (i.e. channel) you need to indicate the bus the new array is on (for my system my primary array is on bus 0, and my second array is on bus 1)

The forth prompt is the SCSI ID of the array (with most controllers this is the same as the ID of the first hard drive in the array). This probably is not 0.

The fifth prompt is the Logical Unit ID (i.e. LUN), which is always 0 for hard drive arrays.

So in answer to your question, no it is not "mkdev then 1,0,0,0". It is probably more like "mkdev then 0,0,3,0" or "mkdev then 0,1,3,0" but that depends on your configuration.

After you create the hard drive device for the new array you will need to partition it, install a filesystem on it, and mount the filesystem before you will be able to use it.

 

[Rules2liveby]

I have found the solution now, thanks for your help.

The array controller spoofs a different LUN for new arrays on the same adapter. It was the last thing we tried!!