Offlined A5x00 disks return to online state after LIP

Asset ID:	1-72-1009229.1
Update Date:	2016-02-02
Keywords:

Solution Type Problem Resolution Sure

Solution 1009229.1 : Offlined A5x00 disks return to online state after LIP

Applies to:

Sun Storage A5000 Array - Version All Versions and later
Sun Storage A5200 Array - Version All Versions and later
Sun Storage A5100 Array - Version All Versions and later
All Platforms
*** Checked for relevance on 04-Jul-2014 ***

Symptoms

Disks that have been placed in an offline state via the luxadm -e offline <path> command are returned to an online state following a luxadm remove of a different disk.

Changes

Administrator actions previously offlined one or more disks. A disk or disks that have been placed in an offline state via the luxadm -e offline <path> command are returned to an online state following a luxadm remove of a different disk.

Cause

Luxadm command has side affects on unrelated disks.

Solution

The luxadm remove command forces the link to reinitialize, using the Loop Initialization Primitive (LIP) sequence. This LIP process causes all devices to participate in loop initialization. Previously off-lined A5x00 disks will come online.

Other commands and actions that can cause similar behavior are the luxadm -e forcelip, luxadm insert,a host reboot or any physical change in the loop.

See the following example which illustrates this behavior.

Firstly see the example of an array without any disks being offline. (note REAR Slot 4 disk is not present)

hostA# luxadm display MINE

SENA
DISK STATUS
SLOT FRONT DISKS (Node WWN) REAR DISKS (Node WWN)
0 On (O.K.) 200000203704faa8 On (Loop not accessible)
1 On (O.K.) 20000020370709ec On (Loop not accessible)
2 On (O.K.) 20000020370707fa On (Loop not accessible)
3 On (O.K.) 20000020371636bd On (Loop not accessible)
4 On (O.K.) 20000020370d6676 Not Installed
5 On (O.K.) 2000002037145a35 On (Loop not accessible)
6 On (O.K.) 2000002037070913 On (Loop not accessible)

SUBSYSTEM STATUS
FW Revision:1.09 Box ID:2 Node WWN:5080020000000550 Enclosure Name:MINE
Power Supplies (0,2 in front, 1 in rear)
0 O.K.(rev.-02) 1 O.K.(rev.-02) 2 O.K.(rev.-02)
Fans (0 in front, 1 in rear)
0 O.K.(rev.-05) 1 O.K.(rev.-00)
ESI Interface board(IB) (A top, B bottom)
A: O.K.(rev.-04)
GBIC module (1 on left, 0 on right in IB)
0 Failed(mod.-05): Not receiving a signal
1 Not Installed
B: O.K.(rev.-04)
GBIC module (1 on left, 0 on right in IB)
0 O.K.(mod.-05)
1 Not Installed
Disk backplane (0 in front, 1 in rear)
Front Backplane: O.K.(rev.-05)
Temperature sensors (on front backplane)
0:42?C 1:42?C 2:40?C 3:39?C 4:40?C 5:40?C
6:43?C (All temperatures are NORMAL.)
Rear Backplane: O.K.(rev.-05)
Temperature sensors (on rear backplane)
0:40?C 1:42?C 2:40?C 3:39?C 4:39?C 5:39?C
6:42?C (All temperatures are NORMAL.)
Interconnect assembly
O.K.(rev.-03)
Loop configuration
Loop A is configured as two separate loops.
Loop B is configured as two separate loops.
Language USA English

Next we will offline a disk patch

hostA# luxadm -e offline /dev/rdsk/c3t66d0s2

 

Observe the disk path is now down/oflfine

hostA# luxadm display MINE
SENA
DISK STATUS
SLOT FRONT DISKS (Node WWN) REAR DISKS (Node WWN)
0 On (O.K.) 200000203704faa8 On (Loop not accessible)
1 On (O.K.) 20000020370709ec On (Loop not accessible)
2 On (No path found)20000020370707fa On (Loop not accessible)
3 On (O.K.) 20000020371636bd On (Loop not accessible)
4 On (O.K.) 20000020370d6676 Not Installed
5 On (O.K.) 2000002037145a35 On (Loop not accessible)
6 On (O.K.) 2000002037070913 On (Loop not accessible)
SUBSYSTEM STATUS
FW Revision:1.09 Box ID:2 Node WWN:5080020000000550 Enclosure Name:MINE
Power Supplies (0,2 in front, 1 in rear)
0 O.K.(rev.-02) 1 O.K.(rev.-02) 2 O.K.(rev.-02)
Fans (0 in front, 1 in rear)
0 O.K.(rev.-05) 1 O.K.(rev.-00)
ESI Interface board(IB) (A top, B bottom)
A: O.K.(rev.-04)
GBIC module (1 on left, 0 on right in IB)
0 Failed(mod.-05): Not receiving a signal
1 Not Installed
B: O.K.(rev.-04)
GBIC module (1 on left, 0 on right in IB)
0 O.K.(mod.-05)
1 Not Installed
Disk backplane (0 in front, 1 in rear)
Front Backplane: O.K.(rev.-05)
Temperature sensors (on front backplane)
0:42?C 1:42?C 2:40?C 3:39?C 4:40?C 5:42?C
6:43?C (All temperatures are NORMAL.)
Rear Backplane: O.K.(rev.-05)
Temperature sensors (on rear backplane)
0:40?C 1:42?C 2:40?C 3:39?C 4:39?C 5:39?C
6:42?C (All temperatures are NORMAL.)
Interconnect assembly
O.K.(rev.-03)
Loop configuration
Loop A is configured as two separate loops.
Loop B is configured as two separate loops.
Language USA English

 
 
Next we will force a loop reset (normaly used to rescan the loop for disks/devices)

hostA# luxadm -e forcelip

Observe that the effect is the access to the offlined disk has now been restored.

hostA# luxadm display MINE

SENA
DISK STATUS
SLOT FRONT DISKS (Node WWN) REAR DISKS (Node WWN)
0 On (O.K.) 200000203704faa8 On (Loop not accessible)
1 On (O.K.) 20000020370709ec On (Loop not accessible)
2 On (O.K.) 20000020370707fa On (Loop not accessible)
3 On (O.K.) 20000020371636bd On (Loop not accessible)
4 On (O.K.) 20000020370d6676 Not Installed
5 On (O.K.) 2000002037145a35 On (Loop not accessible)
6 On (O.K.) 2000002037070913 On (Loop not accessible)
SUBSYSTEM STATUS
FW Revision:1.09 Box ID:2 Node WWN:5080020000000550 Enclosure Name:MINE
Power Supplies (0,2 in front, 1 in rear)
0 O.K.(rev.-02) 1 O.K.(rev.-02) 2 O.K.(rev.-02)
Fans (0 in front, 1 in rear)
0 O.K.(rev.-05) 1 O.K.(rev.-00)
ESI Interface board(IB) (A top, B bottom)
A: O.K.(rev.-04)
GBIC module (1 on left, 0 on right in IB)
0 Failed(mod.-05): Not receiving a signal
1 Not Installed
B: O.K.(rev.-04)
GBIC module (1 on left, 0 on right in IB)
0 O.K.(mod.-05)
1 Not Installed
Disk backplane (0 in front, 1 in rear)
Front Backplane: O.K.(rev.-05)
Temperature sensors (on front backplane)
0:42?C 1:42?C 2:40?C 3:39?C 4:40?C 5:40?C
6:43?C (All temperatures are NORMAL.)
Rear Backplane: O.K.(rev.-05)
Temperature sensors (on rear backplane)
0:40?C 1:42?C 2:40?C 3:39?C 4:39?C 5:39?C
6:42?C (All temperatures are NORMAL.)
Interconnect assembly
O.K.(rev.-03)
Loop configuration
Loop A is configured as two separate loops.
Loop B is configured as two separate loops.
Language USA English

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