A3510FC Host-LUN mapping
While in the process of updating the Controller firmware on a A3510FC with 2 jbods shared by 3 host systems I noticed that one ID is used by 2 channels i.e.
CHL 0ID 42 (primary)Lun 2, 3Host1
CHL 1ID 42 (secondary) Lun 5,6,7 Host 2
I find this a strange config as I would have expected
CHL 0 ID 40 (primary) Lun 2,3 Host1
CHL 1 ID 42 (secondary) Lun 5,6,7Host 2
The HBA connections from the host are:
ID 40 connects to Host1
ID 47 connects to Host1
ID 42 connects to Host2
ID 45 connects to Host2
My question is can a single ID be shared between channels?
[635 byte] By [
kwoolard] at [2007-11-25 23:02:03]
# 2
sccli> show lun-maps
Ch Tgt LUNld/lvID-Partition Assigned Filter Map
0 420ld21089078D-00Primary210000E08B18E268
0 421ld33B832055-00Primary210000E08B18E268
0 42 13ld45BD62C80-00Primary210000E08B18E268
1 420ld507F3C6D5-00Secondary 210000E08B18AB51
1 421ld67CCFA448-00Secondary 210000E08B18AB51
1 422ld701FB1159-00Secondary 210000E08B18AB51
4 440ld07AE45146-01Primary210000E08B122CB5
4 441ld11BE12B14-00Primary210000E08B122CB5
4 450ld507F3C6D5-00Secondary 210000E08B18AC66
4 451ld67CCFA448-00Secondary 210000E08B18AC66
4 452ld701FB1159-00Secondary 210000E08B18AC66
5 470ld21089078D-00Primary210000E08B18F367
5 471ld33B832055-00Primary210000E08B18F367
5 47 13ld45BD62C80-00Primary210000E08B18F367
sccli> show channels
Ch TypeMediaSpeedWidth PID / SID
--
0 HostFC(L)2GSerial 40,42 / 41
1 HostFC(L)2GSerial 43,44 / 42
2 DriveFC(L)2GSerial 14 / 15
3 DriveFC(L)2GSerial 14 / 15
4 HostFC(L)2GSerial 44 / 45
5 HostFC(L)2GSerial 47 / 46
6 HostLANN/ASerial N/A / N/A
# 3
After looking at your configuration, you are correct in expecting that Ch 0 should have ID 40 (not 42). I've never seen
this configuration since it is not based on Sun's Best Practices (ref <a href="http://www.sun.com/products-n-solutions/hardware/docs/pdf/816-7325-16.pdf " target="_blank"> http://www.sun.com/products-n-solutions/hardware/docs/pdf/81 6-7325-16.pdf</a>).
The correct channel configuration for your setup should be:
Ch TypeMediaSpeedWidth PID / SID
--
0 HostFC(L)2GSerial 40 / 41
1 HostFC(L)2GSerial 43 / 42
2 DriveFC(L)2GSerial 14 / 15
3 DriveFC(L)2GSerial 14 / 15
4 HostFC(L)2GSerial 44 / 45
5 HostFC(L)2GSerial 47 / 46
6 HostLANN/ASerial N/A / N/A
If you wanted to fix that and configure according to Sun's Best Practices, it wouldn't be all that difficult. It would
just require down time since you would need to reset the controller and remap the luns on the host connected to Channel 0.
The steps would be as follows:
1) unmap the affected partition (unmap 0.42.0; unmap 0.42.1; unmap 0.42.13)
2) correct channel configuration per Sun's Best Practices
sccli> configure channel 0 host pid 40
sccli> configure channel 1 host pid 43
Note: A controller reset is required for the channel config to take into effect. So you'll need to make sure
no array activity is in place on those three hosts attached to the 3510 array.
3) re-map the partition (map 1089078D-00 0.40.0; map 3B832055-00 0.40.1; map 5BD62C80-00 0.40.2)
FYI, looks like you're also missing one lun mapping (for host connected to Ch4 primary ctrl,Ch1 secondary ctrl).
You can verify this from the OS side since it will NOT have dual path for those luns (LD0 & LD1). Unless of course, you
only have one fibre connection to that host. But if you did intend to have dual paths, it's easily correctable with
adding the appropriate lun maps:
sccli> map 7AE45146-01 1.43.0
sccli> map 1BE12B14-00 1.43.1
-Jojo Jaballas
Jojo at 2007-7-5 17:51:30 >
