Very Computer

by **Mat** » Thu, 11 Oct 2001 04:52:17

How can I get an A5200 to present all 22 drives in the box? I can only see 11
of the 22, I am on an e420, using vxvm, through a fibre channel card
qlogic 2200. Only one A5200 interface plugged in.

by **Jonathan Hay** » Thu, 11 Oct 2001 07:37:33

Your A5200 is configured in by default into "split loop" mode, which means the
Front and Back of the A5200 are competely separate arrays. There are lots of ways
to configure this the array but it was designed for redundancy - separate front
and rear backplanes, dual ported fibre channel disk drives, etc. . So why would
you want to hook up to the A5200 with one connection? The bottom line here is you
really need to read the documentation before getting too far along. See this
link.

Jonathan

> How can I get an A5200 to present all 22 drives in the box? I can only see 11
> of the 22, I am on an e420, using vxvm, through a fibre channel card
> qlogic 2200. Only one A5200 interface plugged in.

by **Jonathan Hay** » Thu, 11 Oct 2001 07:39:16

Your A5200 is configured in by default into "split loop" mode, which means the
Front and Back of the A5200 are competely separate arrays. There are lots of ways
to configure this the array but it was designed for redundancy - separate front
and rear backplanes, dual ported fibre channel disk drives, etc. . So why would
you want to hook up to the A5200 with one connection? The bottom line here is you
really need to read the documentation before getting too far along. See this
link.

Jonathan

> How can I get an A5200 to present all 22 drives in the box? I can only see 11
> of the 22, I am on an e420, using vxvm, through a fibre channel card
> qlogic 2200. Only one A5200 interface plugged in.

by **Jonathan Hay** » Thu, 11 Oct 2001 08:50:15

Your A5200 is configured in by default into "split loop" mode, which means the
Front and Back of the A5200 are competely separate arrays. There are lots of ways
to configure this the array but it was designed for redundancy - separate front
and rear backplanes, dual ported fibre channel disk drives, etc. . So why would
you want to hook up to the A5200 with one connection? The bottom line here is you
really need to read the documentation before getting too far along. See this
link.

Jonathan

> How can I get an A5200 to present all 22 drives in the box? I can only see 11
> of the 22, I am on an e420, using vxvm, through a fibre channel card
> qlogic 2200. Only one A5200 interface plugged in.

by **Jonathan Hay** » Thu, 11 Oct 2001 09:03:20

Your A5200 is configured in by default into "split loop" mode, which
means the
Front and Back of the A5200 are competely separate arrays. There are
lots of ways
to configure this the array but it was designed for redundancy -
separate front
and rear backplanes, dual ported fibre channel disk drives, etc. . So
why would
you want to hook up to the A5200 with one connection? The bottom line
here is you
really need to read the documentation before getting too far along. See
this
link.

Jonathan

> How can I get an A5200 to present all 22 drives in the box? I can only see 11
> of the 22, I am on an e420, using vxvm, through a fibre channel card
> qlogic 2200. Only one A5200 interface plugged in.

by **Jonathan Hay** » Thu, 11 Oct 2001 09:12:21

I'm going to have a word with my ISP.

Sorry,

Jonathan

by **Peter Baue** » Thu, 11 Oct 2001 05:58:03

Your probably in "split loop". Check the display. Is every disk connected to
every loop?

Read manual, refer to "split loop"

Quote:> How can I get an A5200 to present all 22 drives in the box? I can only see
11
> of the 22, I am on an e420, using vxvm, through a fibre channel card
> qlogic 2200. Only one A5200 interface plugged in.