I've got a stack of s25N switches running the latest software and stacked:
-- Stack-unit Status --
------------------------------------------------
Mgmt ID: 1
Stack-unit ID: 1
Stack-unit Redundancy Role: Primary
Stack-unit State: Active
Stack-unit SW Version: 8.4.2.7
Link to Peer: Down
-- PEER Stack-unit Status --
------------------------------------------------
Stack-unit State: Booting
Peer stack-unit ID: 0
Stack-unit SW Version: Unknown
-- Stack-unit Redundancy Configuration --
-- Unit 0 --
Unit Type : Standby Unit
Status : booting - ipc timeout
Next Boot : online
Required Type : S25N - 24-port E/FE/GE (SB)
Current Type : S25N - 24-port E/FE/GE (SB)
Current Type : S25N - 24-port E/FE/GE (SB)
Hardware Rev : 2.0
Num Ports : 28
Up Time : 0 sec
FTOS Version : 8.4.2.7
Jumbo Capable : yes
POE Capable : no
Boot Flash : 2.8.1.2
Memory Size : 268435456 bytes
Temperature : 39C
Voltage : ok
Serial Number : DL2D3520042
Part Number : 7590005704 Rev D
Vendor Id : 07
Date Code : 12232013
Country Code : 04
Piece Part ID : CN-0FPKNJ-28298-3CN-0042
PPID Revision : A00
Service Tag : 812CVS1
Expr Svc Code : 174 786 851 53
Auto Reboot : enabled
Burned In MAC : 00:00:00:00:00:00
No Of MACs : 3
sw001#show system stack-unit 1
-- Unit 1 --
Unit Type : Management Unit
Status : online
Next Boot : online
Required Type : S25N - 24-port E/FE/GE (SB)
Current Type : S25N - 24-port E/FE/GE (SB)
Master priority : 0
Hardware Rev : 2.0
Num Ports : 28
Up Time : 1 wk, 3 day, 13 hr, 33 min
FTOS Version : 8.4.2.7
Jumbo Capable : yes
POE Capable : no
Boot Flash : 2.8.1.2
Memory Size : 268435456 bytes
Temperature : 45C
Voltage : ok
Serial Number : DL2D2360038
Part Number : 7590005704 Rev C
Vendor Id : 07
Date Code : 09052012
Country Code : 04
Piece Part ID : CN-0KTKM4-28298-295-0038
PPID Revision : A00
Service Tag : BSPP9T1
Expr Svc Code : 256 808 281 33
Auto Reboot : enabled
Burned In MAC : 00:01:e8:d7:4f:14
No Of MACs : 3
-- Module 0 --
Status : not present
-- Module 1 --
Status : online
Module Type : S50-01-12G-2S - 2-port 12G Stacking (SB)
Num Ports : 2
Hot Pluggable : no
-- Power Supplies --
Unit Bay Status Type
---------------------------------------------------------------------------
1 0 up AC
1 1 up AC
-- Fan Status --
Unit TrayStatus Speed Fan0 Fan1 Fan2 Fan3 Fan4 Fan5
--------------------------------------------------------------------------------
1 up low up up up up
Now how can I tell what caused the failure, and how can I recover? I will try a "hard boot" on this particular member and see if this happens again. But this worries me as if this happens in the field and I cannot get to the machine..what then?