NEC 1TB 3.5" M100 NF5321-SM706E Manuale Utente
Codici prodotto
NF5321-SM706E
NEC Confidential
65
Battery Lifetime
The wear/lifetime of the battery is set for the hardware stable operation in M-Series. When purchasing
NEC products, it is recommended to review the wear/lifetime specifications and replacement costs. It
may be necessary to replace a battery for operation stability prior to the recommended replacement
time in the list below.
NEC products, it is recommended to review the wear/lifetime specifications and replacement costs. It
may be necessary to replace a battery for operation stability prior to the recommended replacement
time in the list below.
5. Functions <Battery Lifetime>
(1) Wear/Lifetime for stable operation
5 years
Disk Array Unit
(2) Unit necessary to replace separately
Additional
Battery
5 years
Battery
Cost
Replacement Unit
Wear/Lifetime
Item
Battery Replacement
The NEC Disk Array Unit performance is enhanced when write-cache is on. The battery power is used
to retain the data on cache when an unplanned disconnection such as a power outage occurs. The
battery power is consumed while the disk array is running. It is necessary to replace the battery in
about five years*. This replacement can be done while the system is running.
to retain the data on cache when an unplanned disconnection such as a power outage occurs. The
battery power is consumed while the disk array is running. It is necessary to replace the battery in
about five years*. This replacement can be done while the system is running.
* The lifetime of the battery is shortened when it is used at high temperature. Whereas it is about five
years at an ambient temperature of 25ºC (77ºF), it decreases to about half (two years and six
months) when the ambient temperature rises 10ºC (18ºF). As the frequency of battery backup
increases, the lifetime of battery decreases. This lifetime above is calculated considering only an
unplanned power disconnection such as power outage.
months) when the ambient temperature rises 10ºC (18ºF). As the frequency of battery backup
increases, the lifetime of battery decreases. This lifetime above is calculated considering only an
unplanned power disconnection such as power outage.