topic Re: logical drive and array in Disk Enclosures

logical drive and array

Mangin_1 — Mon, 01 Aug 2005 06:48:21 GMT

Hi,

I have one array composed of 6 physical disks. This array has two logical drives with 3 physical disks each.
logical drive 1 : os disk
logical drive 2 : project disk

I'd like to delete logical drive 2 and to remove the 3 disks corresponding to my logical drive 2.

Is it possible ?
Are the data of the logical drive 1 copied only on the 3 physical disks corresponding to this logical drive, or are the data copied on all the disks ??

Re: logical drive and array

Uwe Zessin — Mon, 01 Aug 2005 06:58:43 GMT

Patrick,
if we are talking about a SmartArray controller...

It depends on what you mean by 'array'.

Do you have one or two disk drive arrays (disk groups)? You can put multiple logical disks into one disk drive array. In that case both logical disks are stored on all physical disk drives.

I suggest you go into ACU and check this.

Re: logical drive and array

Mangin_1 — Mon, 01 Aug 2005 07:04:06 GMT

Yes I spoke about a smartarray controller.

I have one disk drive array, which has two logical drives.

So all my logical drives are stored on all my disks ?
Is it right ?

Thanks for your answer Uwe

Re: logical drive and array

Uwe Zessin — Mon, 01 Aug 2005 07:16:14 GMT

Yes, a logical disk is evenly distributed over all physical disk drives in a disk drive array.

You can expand it by adding more disks and the controller will redistribute the existing data, but as far as I can tell, you cannot remove physical disk drives from a disk drive array.

A SmartArray controller can work with multiple disk drive arrays, but of course that isn't any help now.

Re: logical drive and array

Mangin_1 — Mon, 01 Aug 2005 07:25:53 GMT

Thanks Uwe for your answer.

That's what I thought but I received an opposite answer from HP support, so I didn't know what to think.