AX150-250 without UPS , write cache permanently disabled

Question

This is a new installation ,
I have followed the instructions and the system is networked manageable
Everything else is OK but I am getting write cache disabled, I am assuming this is because I have no UPS 'directly' connected to the array (our server room is UPS protected)
No UPS was delivered with the array , should I have one ?
If not how do I disable the UPS serial connection

regards

Alick

rhythmrider · Answer

If you have the model with two storage processors, you must use a UPS to enable write caching.

Unless you got a second hand or refurbished unit, it is not sold without the required UPS. The AX is looking for signal from the UPS on the UPS serial port. (the one with the little picture of a battery next to it) Without that, write caching will not work.

I hope this helps.
Dana

Nanoverde · Answer

it means that that the single controller AX150 cannot have a write cache enabled, since the UPS is not foreseen for it?thanks

DGM3 · Answer

it means that that the single controller AX150 cannot
have a write cache enabled, since the UPS is not
foreseen for it?

The single controller offerings of AX150 do support Write Cache, by use of battery-protected memory, which "holds" data in memory in the event of a power outage.
The dual controller offerings of AX150 utilize the UPS to allow data in Write Cache to be saved to physical disk in the event of a power outage.

Some additonal discussion can be found in the data sheet, at;
http://www.emc.com/collateral/hardware/data-sheet/c1111-clariion-ax150-ax150i.pdf

Regards,
DGM

helenjay69 · Answer

supplier supplied a UPS , everything now OK, thanks for the helpregardsAlick

CLARiiON

AX150-250 without UPS , write cache permanently disabled

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