SUMMARY: Ghost Disk in E-3500

From: Bhavesh Shah (bshah@citadon.com)
Date: Mon Apr 18 2005 - 19:36:27 EDT

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MANY THANKS to Eugene for his correct answer.
It was wrongly connected from LB - UA changed it back to UA - LA
The Solution is below:
First, a fiber disk has two channels into it, channel A and B.

The E3500 can dual host disks. As such you see the disk via port A and
B, ie
shows twice in format. Note w2200... = PORT B and w2100... = port A.

OK - so you have two disk internal.

The internal bays are made up as 4 top + 4 bottom.

The top 4 bays drive from the top 2 ports ( A + B) on the FC-AL
interface
board . Ditto, the bottom 4 bays off the bottom two ports (A + B).FC-AL
interface board is at rear right - next to power cord - can house up to
4
gbics.

If you have 1 disk top, one disk bottom, it means you should move the
one
GBIC and FC-AL cable one port down, from second from top to 3rd from top
on
interface brd.

It cab be drawn as:

+-----+-----+-----+------------+-+ Top Bays - Port A 21000...
+---+ +---+ +---+ +---+ +-+
| | | | | | | |
| | | | | | | |
| | | | | | | |
+---+ +---+ +---+ +---+ +-+
+-----+-----+-----+------------+-+ Top Bays - Port B 22000...

+-----+-----+-----+------------+-+ Bottom Bays - Port A 21000...
+---+ +---+ +---+ +---+ +-+
| | | | | | | |
| | | | | | | |
| | | | | | | |
+---+ +---+ +---+ +---+ +-+
+-----+-----+-----+------------+-+ Bottom Bays - Port B 22000...

MY Original question was:

Hi Gurus,

I have a strange issue. I have Sun E-3500 with 2X9GB internal Fiber
Channel Disks running Solaris 8 at co-location. But the problem is I
can't see the second disk instead in format I see the root disk twice.
The WWN of root disk is w21000020370e84aa whereas WWN of second disk
(which is nothing but root disk only) shows WWN as w22000020370e84aa.
Which means one disk is in Port A whereas second disk is in Port B
leaving that both WWN no are same. I am wondering where the second disk
gone? And why root disk is showing twice? I tried to delete partition 7
(Home) as was able to delete the same and eventually was deleted from
root Disk 0. How come mounted partition can be deleted?

Any help/pointer to figure out this GHOST Disk issue will be
appreciated.

I will summarize.

Regards

format

0. c0t0d0 <SUN9.0G cyl 4924 alt 2 hd 27 sec 133>

/sbus@2,0/SUNW,socal@d,10000/sf@0,0/ssd@w21000020370e84aa,0

1. c1t0d0 <SUN9.0G cyl 4924 alt 2 hd 27 sec 133>

/sbus@2,0/SUNW,socal@d,10000/sf@1,0/ssd@w22000020370e84aa,0

Partition table

Disk 0

Current partition table (original):

Total disk cylinders available: 4924 + 2 (reserved cylinders)

Part Tag Flag Cylinders Size Blocks

0 root wm 0 - 292 513.75MB (293/0/0) 1052163

1 swap wu 293 - 1461 2.00GB (1169/0/0) 4197879

2 backup wm 0 - 4923 8.43GB (4924/0/0) 17682084

3 var wm 1462 - 2046 1.00GB (585/0/0) 2100735

4 unassigned wm 2047 - 3169 1.92GB (1123/0/0) 4032693

5 usr wm 3170 - 4338 2.00GB (1169/0/0) 4197879

6 unassigned wm 0 0 (0/0/0) 0

7 home wm 4339 - 4923 1.00GB (585/0/0) 2100735

Disk 1