Long Term Array Storage - Hitachi AMS 2000 Series Service Manual

Figure 5-5: Disconnecting Interface Cable (AMS 2100/2300 shown)

Long term array storage

The cache backup batteries in an AMS 2000 Family array cannot hold a
charge indefinitely. If you do not use an array for six months or more, move
the batteries to a system that is being used, or turn the array on for at least
24 hours once every six months.
CAUTION! If the array is not energized for more than 6 months, the
battery will likely discharge completely. When the battery
completely discharges, it may be damaged and you may not be able
to recharge it. To prevent this from happening, charge the battery
for a minimum of 24 hours at least once every six months.
Maintenance
Hitachi AMS 2000 Family Storage System Service Guide
5–9