When you plug in your computer, start it up, and go straight to maxView, you will see that the battery is not fully charged and the write cache is temporarily disabled.
If you select your Adaptec SmartRAID controller in maxView, in the "Green Backup Unit" section, you will see that :
In the "Controller Cache" section of that same page, you will see that :
It's therefore normal that the write cache is temporarily disabled if you have just started your computer / server, even if you have a battery attached to your Adaptec SmartRAID controller.
In the "Events" section at the bottom of the page, you can see these events appear :
Once the battery (Green Backup Unit) is charged, you will see that :
At the bottom of the maxView Storage Manager interface, you will also see these events appear :
If you still see orange icons on the left, as well as on the "Properties" tab, click "Refresh" at the top right to update the maxView interface.
Once you have clicked on "Refresh", a "System refreshed" event will appear at the bottom of the page and you will see that the orange icons will have disappeared.
If you wish, be aware that you can also check the charging status of this battery via the configuration tool of your controller (ACU).
To do this, when starting your computer / server, press the "CTRL + A" keys (on a QWERTY keyboard, since it's in English) or "CTRL + Q" (on an AZERTY keyboard).
Then, go to : Configure Controller Settings.
Then, in : Backup Power Source.
As you can see, at the moment this battery is charging.
Backup Power Status : Charging
Once it's loaded, the status will change to : Charged.
Important : if write caching is disabled when there is no battery plugged into your Adaptec SmartRAID controller or temporarily disabled when the battery is not fully charged, it's to protect the integrity of your data.
Indeed, if write cache is enabled and a power outage occurs, data may be lost or corrupted (if data was in cache at the time of the power outage).
As you will see below, it's technically possible to always enable write cache even if there is no battery in your case or the battery is not fully charged.
However, this is strongly discouraged (for the reason cited above).
The only time this can be useful is if your computer or server (in which this Adaptec SmartRAID controller is located) is protected by an UPS (Uninterruptible Power Supply).
In this case, since you are protected against power cuts, no data will be lost or corrupted by enabling this setting (if you shut down your computer properly before your UPS battery is completely empty).
This will allow you to benefit from the write cache as soon as your computer / server starts without any risk.
If you still want to permanently enable the write cache of your Adaptec SmartRAID controller, then go to its "maxView Storage Manager" web interface and select your Adaptec SmartRAID controller in the left column.
Then, click on the 1st icon of the "Controller" block located at the top of the page.
Note : as you can see on the right of the page, the "No-Battery Write Cache" setting is disabled for the moment.
In the "Cache" tab, you will see that the "No-Battery Write Cache" setting is disabled by default.
Enable this setting by selecting the "Enabled" value and click OK to save this change.
Attention : comme précisé par Microsemi dans son document "Installation and User's Guide - Microsemi Adaptec® SmartRAID 3100 Series" (page 64), l'activation du cache en écriture sans une batterie complètement chargée peut causer des pertes de données dans le cas d'une coupure de courant.
Warning : as specified by Microsemi in its "Installation and User's Guide - Microsemi Adaptec® SmartRAID 3100 Series" (page 64) document, enabling the write cache without a fully charged battery can cause data loss in the case of a power outage.
The "Set properties operation successful" message appears.
Now, the "No-Battery Write Cache" setting is enabled.
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