VessRaid 1840i forgets management and iSCSI IP after poweroff

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  • Last Post 25 May 2023
  • Topic Is Solved
Flo Faber posted this 03 May 2023

Hello,

so I got a VessRaid 1840i which works fine so far but everytime the system is disconnected from the power it "forgets" it's management and iSCSI IP address. Everything else like mailserver-IP, disk arrays, password, etc... is saved correctly and applied after the system is reconnected to power.

So whenever it has no power for some short amount of time (less than 1h but I don't know exactly) I need to reconfigure it's management and iSCSI IP address via serial. If I shut it down (poweroff) and turn it back one after a while, the IPs are not reset and it works perfectly.

The unit has a backup battery which is OK according to the VessRaid.

Does the VessRaid have an extra CMOS Battery which might be emtpy or does someone know the cause of the problem?

Thank you very much,

Best Regards Flo

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R P posted this 08 May 2023

Hi Flo,

Most controllers do have a CMOS battery that retains NVRAM and some settings. In the currnet hardware it's a standard CR2032 lithium coin cell. Please examine the controller, there's likely to be a battery somewhere.

Flo Faber posted this 13 May 2023

 Hi Richard,

 

yes, it seems there really is a battery on the controller (yellow block):

And here a closeup picture of the battery:

The battery itself sits on top of a M48T201V85MH1 which, in my understanding, holds some sort of data(?).

However, I will now try to get my hand on a couple of those batteries and keep you posted if it fixed the issue.

 

Thank you very much so far.

BR Flo

Flo Faber posted this 25 May 2023

So yesterday I put in a new Battery, turned on the system, configured an IP address, turned it off and removed the power. After about 24h I now turned it back on and saw that the IP does not get lost anymore on a power outage.

The issue is now fixed. Thank you very much.

R P posted this 25 May 2023

Hi Flo,

Fantastic.

It looks like the M48T201V85MH1 does a lot of things.

------

FEATURES SUMMARY
■ CONVERTS LOW POWER SRAM INTO NVRAMs
■ YEAR 2000 COMPLIANT
■ BATTERY LOW FLAG
■ INTEGRATED REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY AND CRYSTAL
■ WATCHDOG TIMER
■ CHOICE OF WRITE PROTECT VOLTAGES
   (VPFD = Power-fail Deselect Voltage):
   – M48T201Y: V CC = 4.5 to 5.5V       4.1V ≤ V PFD ≤ 4.5V
   – M48T201V: V CC = 3.0 to 3.6V       2.7V ≤ V PFD ≤ 3.0V
■ MICROPROCESSOR POWER-ON RESET (Valid even during battery back-up mode.)
■ PROGRAMMABLE ALARM OUTPUT ACTIVE IN THE BATTERY BACKED-UP    Backup/Alarm 44-Pin SOH T/R

 

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