Acer HDS AMS200 Reference Manual page 315

Table C.1 Basic Specifications of AMS200 (continued)
Model Item
Cache Capacity
specifications
(M bytes/CTL)
Control
method
Battery
backup
Backup
duration
(h) ( Note 1 )
Maintenance Spare disk
specifications/
Display
antifault
function
specifications
Insulation Insulation
performance withstand
voltage
Insulation
resistance
Note 1:
Non-volatility of data in the cache memory is ensured against power trouble such as a
sudden power failure. It transfers data in the Cache memory to Disk drives by turning off
the power normally, and prevents the battery charge from being wasted.
When the subsystem enters the Cache Backup mode, a warning (lighting of the orange
LED) informing of a voltage drop of the battery may be issued when the subsystem is
started. It shows that the remaining capacity of the battery is not sufficient, and in this
state, the subsystem operates disabling the Write Cache function automatically.
When the battery is charged, the warning indication disappears, and the subsystem
continues the operation enabling the Write Cache function.
The warning indication disappears within 6 hours at the latest. Even when the warning is
being indicated, normal functional operation is assured although the operation is
performed in the Write-Through mode and the R/W performance is lowered because the
Write Cache function is disabled.
The battery is subject to the effect of the environmental temperature; therefore, avoid
using a battery in unnecessarily continuous operation at a high temperature.
If the subsystem is not energized for more than three months, over-discharging of the
battery occurs and can result in unrecoverable damage. The battery must be energized
more than 6 hours at least once a month, or the subsystem must be stored with the
switch of the battery turned off. Even with the switch turned off, the battery discharges
naturally. In this case, charge the battery once per six months for longer than 6 hours.
Floor Model
Floor Floor
(RKS+H1J) (RKS+RKAJ+H2J)
Model
Model
1,024 to 2,048
Read LRU/Write after
Provided
24 (When cache of 2,048 M bytes/CTL)
Up to fifteen of mounted Disk drives can be set to Spare disks
Status LEDs (POWER, READY, WARNING, and ALARM), LED of maintenance part
AC 1,500 V AC 1,500 V
(10 mA, 1 (100 mA, 1 min)
min)
DC 500 V, 10 M Ω or more
Acer | HDS AMS200 User and Reference Guide
Rack-Mount Model
RKS RKAJ
-
-
-
-
AC 1,500 V (10 mA, 1 min)
RKAJAT
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