Hello,   Curious why you rebooted?     One thing you can try is power down the array.  Pull out the active controller a couple of inches. Connect the serial port to the other CM and power it up.  It's possible missing cache is located in the the other CM.  If so the array should boot up.  Then you can insert the other CM.   If it doesn't come up fully run those two commands again.   Depending on where you are you can purchase a one-time support call and get some assistance.  You also might want to investigate renewing the support contract.   Do you have a backup of this data?   Regards,  Don 
I have a PS4210 that's been running fine for around 4 years.  Very rarely rebooted or power cycled.  When I rebooted it yesterday, it won't boot up fully.  One controller has a red light, the other two greens.  The output below is from the active (working) controller. At login, it gives this: ATTENTION!A critical health condition exists on the array. User intervention is required.Please call your support provider.Once the problem is repaired the array MUST be rebooted. Once logged in: CLI> support exec "raidtool"Driver Status: *Admin Intervention Requested*RAID LUN 0 Ok.raid status unrecoverable.12 Drives (0,2,4,6,8,1,3,5,7,9,10,11)RAID 6 (64KB sectPerSU)Capacity 5,761,185,873,920 bytesRAID LUN 1 Ok.raid status unrecoverable.11 Drives (12,13,14,15,16,17,18,19,20,21,22)RAID 6 (64KB sectPerSU)Capacity 5,185,067,286,528 bytesAvailable Drives List: 23 CLI> support exec "uname -a"NetBSD 5.0_STABLE NetBSD 5.0_STABLE (EQL.PSS) #0: Mon Apr 30 01:53:12 EDT 2018 build[NAME]:/buildarea/V10.0.1__Mon_Apr_30_2018_01_40_29_EDT/bin/destdir.sbmips.64.release/EQL.PSS.64 sbmips CLI> support exec "diskview -j"Enc/Drive State Write Read Power Drive Bad ForceWrite Reset Read Scan Max MaxRetrys Retrys Cycles Timeouts Blocks Retrys Fail Timeout Errors Cominits HrstMsecs______________________________________________________________________________________________________________________0/ 0 Online 0 0 0 0 0 0 0 0 0 0 00/ 1 Online 0 0 0 0 0 0 0 0 0 0 00/ 2 Online 0 0 0 0 0 0 0 0 0 0 00/ 3 Online 0 0 0 0 0 0 0 0 0 0 00/ 4 Online 0 0 0 0 0 0 0 0 0 0 00/ 5 Online 0 0 0 0 0 0 0 0 0 0 00/ 6 Online 0 0 0 0 0 0 0 0 0 0 00/ 7 Online 0 0 0 0 0 0 0 0 0 0 00/ 8 Online 0 0 0 0 0 0 0 0 0 0 00/ 9 Online 0 0 0 0 0 0 0 0 0 0 00/10 Online 0 0 0 0 0 0 0 0 0 0 00/11 Online 0 0 0 0 0 0 0 0 0 0 00/12 Online 0 0 0 0 0 0 0 0 0 0 00/13 Online 0 0 0 0 0 0 0 0 0 0 00/14 Online 0 0 0 0 0 0 0 0 0 0 00/15 Online 0 0 0 0 0 0 0 0 0 0 00/16 Online 0 0 0 0 0 0 0 0 0 0 00/17 Online 0 0 0 0 0 0 0 0 0 0 00/18 Online 0 0 0 0 0 0 0 0 0 0 00/19 Online 0 0 0 0 0 0 0 0 0 0 00/20 Online 0 0 0 0 0 0 0 0 0 0 00/21 Online 0 0 0 0 0 0 0 0 0 0 00/22 Online 0 0 0 0 0 0 0 0 0 0 00/23 Online 0 0 0 0 0 0 0 0 0 0 0 Verified that support contracts are expired just a couple months ago.  Looking for suggestions on how to recover.  Thanks in advance!
PS4210 won't boot