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Troubleshooting 4-9
Compaq Confidential – Need to Know Required
Writer: Bill Reitz Project: Compaq StorageWorks 64-Bit PCI-To-Fibre Channel Host Bus Adapter User Guide Comments:
Part Number: AA-RKPDA-TE 173941-001 File Name: E-CH4 TROUBLESHOOTING.DOCe-ch4 Troubleshooting.doc
Last Saved On: 12/22/99 10:10
AM12/20/99 6:07 PM
Private Loop Device Mapping
In a private loop environment (FCAL, no switch), devices are initially created
based on a fixed address ordering. Once created (at boot), the devices
continue to be tracked based on:
– WWPN: HardAddress=0;MapNodeName=0
– NodeName: HardAddress=0;MapNodeName=1
– D_ID: HardAddress=1; (MapNodeName=don’t care)
This section identifies the initial fixed mapping between the Windows NT
bus/target/lun and a fibre channel native address (AL_PA/SEL_ID). There are
two potential mappings based on a registry parameter [ScanDown=0 (driver
default); use *, ScanDown=1;].
The index into Table 4-5 can be derived by:
#define TARGETS_PER_BUS 32
i = (Srb->PathId > 0) ? Srb->PathId-1 : 0; //Bus 0 = dummy bus nodeInx = ((I *
(TARGETS_PER_BUS-1)) + Srb->TargetId;
Table 4-5
Current Private Loop Device Mapping
Bus #
0
Target#
0-31
Lun#
0-7
*AL_PA
None
*SEL_ID
None
**AL_PA
None
**SEL_ID
None
1*** 0 0-7 0x01 0x7D 0xEF 0x00
1 0-7 0x02 0x7C 0xE8 0x01
2 0-7 0x04 0x7B 0xE4 0x02
3 0-7 0x08 0x7A 0xE2 0x03
4 0-7 0x0F 0x79 0xE1 0x04
5 0-7 0x10 0x78 0xE0 0x05
6 0-7 0x17 0x77 0xDC 0x06
* Use this translation if registry ScanDown = 0 (default)
** Use this translation if registry ScanDown = 1
*** If MapBus0=1;, then device addressing starts with Bus #0, not #1
continued