Quantum| Device Connectivity |
This page answers the following questions:
To see the physical and logical devices present on an IOB, open its supportDump file with WordPad and look for the phrase: "mapShowDevs".
You'll see a section that looks like this:
************ mapShowDevs ************
devId Type Chan iId iLun UID tId tLun Handle Path
-------------------------------------------------------------------------------
000 SNA 127 127 007f 20000230.8c000001 001 000 17273b80h SINGLE
SN: AMP011693-0258
005 FCAL 003 111 0000 500308c0.01c16002 255 255 16de7008h SINGLE
SN: F001C16001
006 FCAL 004 111 0000 500308c0.01c16008 255 255 16de6d08h SINGLE
SN: F001C16007
007 FCAL 005 111 0000 500308c0.01c1600e 255 255 16de6a08h SINGLE
SN: F001C1600D
008 FCAL 006 111 0000 500308c0.01c16014 255 255 16de6708h SINGLE
SN: F001C16013
009 SOIP2 000 000 0003 20900230.8c000001 255 255 06ddc880h SINGLE
SN: ADIC203102087_LL0
Meanings of the Fields Shown Above:
DevId:
This is the internal LUN used by the I/O blade to manage its devices. It is the same number you would see in the leftmost position of the right-hand column in a LUN-mapping screen when setting up FC Host device access.
Type:
Chan:
SN:
The serial number of the device.
To find what physical and logical devices are available for host presentation from each target (host attachment) port on an IOB, open its supportDump file with WordPad and look for the phrase "fcShowDevs".
You'll see a section that looks like this:
************ fcShowDevs ************
Targets Visible to Hosts on FC 1:
LUN Chan Id Lun Vendor Product Rev SN
-----------------------------------------------------
0 0 0 0 ADIC Scalar i2000 4462 AMP011693-0258
5 3 111 0 IBM ULTRIUM-TD3 93G0 F001C16001
6 4 111 0 IBM ULTRIUM-TD3 93G0 F001C16007
9 0 0 3 ADIC Scalar i2000 595A ADIC203102087_LL0
Targets Visible to Hosts on FC 2:
LUN Chan Id Lun Vendor Product Rev SN
-----------------------------------------------------
0 0 0 0 ADIC Scalar i2000 4462 AMP011693-0258
7 5 111 0 IBM ULTRIUM-TD3 93G0 F001C1600D
8 6 111 0 IBM ULTRIUM-TD3 93G0 F001C16013
9 0 0 3 ADIC Scalar i2000 595A ADIC203102087_LL0
Targets Visible to Hosts on FC 3:
LUN Chan Id Lun Vendor Product Rev SN
------------ [ DONT' CARE ] ---------------------
The output for the fcShowDevs command shows what devices on the IOB are available to be presented to the SAN from each target port. In almost all cases, ports 1 and 2 are configured as target ports. But as shown earlier, you can verify that by looking at the port status in the "fcShow 2" section of the supportDump.
Data is presented here for all ports, 1 through 6, but the data found under the initiator ports 3 through 6 is of no use to field service.
The example above shows that:
This presentation of the first two drives from port 1 and the second from port 2 shows that under the Channel Zoning GUI of the i2k, this blade was set up as shown here:
Figure 3
NOTE: Channel Zoning only affects physical devices. The CC LUN and Logical Libraries are ALWAYS present at all target ports.
NOTE: In this case, if a single HBA were zoned to see both ports 1 and 2 of this blade, and we LUN mapped all devices to that HBA, the OS would see one of each tape drive (drives 1 and 2 from port 1, drives 3 and 4 from port 2), but would see two instances of the logical library and CC LUN: -- one each from both ports 1 and 2.
Here is an example where Channel Zoning was not used. Note that all devices are present at both ports 1 and 2:
************ fcShowDevs ************
Targets Visible to Hosts on FC 1:
LUN Chan Id Lun Vendor Product Rev SN
-----------------------------------------------------
0 0 0 0 QUANTUM FC IOB 5931 AMP019778-0125
1 3 0 0 IBM ULTRIUM-TD4 94D4 F0020BB001
2 5 0 0 IBM ULTRIUM-TD4 94D4 F0020BB00D
3 4 0 0 IBM ULTRIUM-TD4 94D4 F0020BB007
4 6 0 0 IBM ULTRIUM-TD4 94D4 F0020BB013
5 0 0 3 ADIC Scalar i2000 590A ADIC263104685_LL0
Targets Visible to Hosts on FC 2:
LUN Chan Id Lun Vendor Product Rev SN
-----------------------------------------------------
0 0 0 0 QUANTUM FC IOB 5931 AMP019778-0125
1 3 0 0 IBM ULTRIUM-TD4 94D4 F0020BB001
2 5 0 0 IBM ULTRIUM-TD4 94D4 F0020BB00D
3 4 0 0 IBM ULTRIUM-TD4 94D4 F0020BB007
4 6 0 0 IBM ULTRIUM-TD4 94D4 F0020BB013
5 0 0 3 ADIC Scalar i2000 590A ADIC263104685_LL0
This corresponds to an IOB set up "without" Channel Zoning, as shown here:
Figure 4
NOTE: In this case, if a single HBA were zoned to see both ports 1 and 2 of this blade, and we LUN mapped all devices to that HBA, we would see "double" the actual devices: one each from both ports 1 and 2.
| Notes |
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