Thursday, July 13, 2006

REAL GOOD SAN INTERVIEW QUESTIONS


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1. The HP Team installed a VA7400 at our location, connecting it directly to N class server. The armdiscover command was run and the storage was visible. My function was to confiure a SAN Fabric with Brocade switches and connect both the Storage and the N class servers to it, this was not under the Hp contract. I'am new to brocade and SAN, after the connections looked fine, ran the armdiscover command on the HP server, to my surprise did not find any storage connected. Here's some output that may help u troubleshoot my problem.

results of nsshow is as follows:

The Local Name Server has 4 entries {
Type Pid COS PortName NodeName TTL(sec)
N 011000; 3;50:06:0b:00:00:10:77:0c;50:06:0b:00:00:10:77:0d; na
FC4s: FCP
Fabric Port Name: 20:00:00:60:69:50:0e:d8
N 011100; 3;50:06:0b:00:00:10:77:b4;50:06:0b:00:00:10:77:b5; na
FC4s: FCP
Fabric Port Name: 20:01:00:60:69:50:0e:d8
NL 01122a; 3;50:06:0b:00:00:15:44:4c;50:06:0b:00:00:09:2f:37; na
FC4s: FCP [HP A6189A HP16]
Fabric Port Name: 20:02:00:60:69:50:0e:d8
NL 011327; 3;50:06:0b:00:00:15:42:44;50:06:0b:00:00:09:2f:37; na
FC4s: FCP [HP A6189A HP16]
Fabric Port Name: 20:03:00:60:69:50:0e:d8
}

ioscan -fnC disk shows this:

disk 21 1/0/0/0.1.19.0.0.0.0 sdisk CLAIMED DEVICE HP A6189A
disk 20 1/0/0/0.1.20.39.0.0.0 sdisk NO_HW DEVICE HP A6189A
disk 19 1/0/0/0.8.0.110.0.0.0 sdisk NO_HW DEVICE HP A6189A
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2. The questions below refer to the foll switchshow output

port 0: sw Online F-Port 50:06:0b:00:00:08:0b:68
port 1: sw Online L-Port 1 private, 11 phantom
port 2: sw Online L-Port 1 private, 11 phantom
port 3: sw No_Light
port 4: sw No_Light
port 5: sw Online F-Port 50:06:0b:00:00:06:89:a6
port 6: sw Online L-Port 1 public
port 7: sw Online F-Port 50:06:0b:00:00:08:5b:cc
port 8: sw Online F-Port 50:06:0b:00:00:06:89:7c
port 9: sw No_Light
port 10: sw Online L-Port 1 public
port 11: sw Online F-Port 50:06:0b:00:00:10:d1:ea
port 12: sw Online F-Port 20:00:00:e0:69:c0:0d:4d
port 13: sw Online F-Port 20:00:00:e0:69:c0:0d:52
port 14: sw Online F-Port 50:06:0b:00:00:10:ef:9c
port 15: sw Online E-Port (unknown)

a. Please help me create a >>recomended<< zoning config for the target connected to (port 11) and initators on (ports 12 and 13).

b. What is difference between port 1 and port 6, although both are "L" ports??

c. Should I zone port 15.
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3. The porterrshow output is appended below. Can you help me draw any conclusions.

Switch:admin> porterrshow

tx rx in err shrt long eof out c3 rjt fail sync sig

--------------------------------------------------------------------------
0: 2.0k 1.8k 0 0 0 0 0 3 0 0 1 1 2 0 0
1: 1.2k 1.9k 0 0 0 0 0 25 0 0 0 3 0 0 0
2: 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0
3: 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0
4: 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
5: 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0
6: 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0
7: 0 0 0 0 0 0 0 6 0 0 0 0 0 0 0

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