Cache Specifications; Performance Reporting And Monitoring - Hitachi AMS 2100 Hardware Manual

Cache specifications

The Cache specifications are shown in
Capacity (MB per
controller)
Control method
Battery backup
Backup duration (h)
Capacity (MB per
controller)
Control method
Battery backup
Backup duration (h)
1. LRU = Least Recently Used. An algorithm where new items are placed at the
top of the cache and items at the bottom of the cache are discarded when the
cache grows past its size limit. Whenever an item is accessed, it is pulled back
to the top of the cache.
2. Backup time in hours with two full charged cache backup batteries.

Performance reporting and monitoring

The Navigator 2 storage management software provides the capability to
either monitor the disk array in real-time or collect historical data regarding
the performance of the storage system.
1–20
Table 1-9: Cache Specifications
Item
2,048, 4,096
Read LRU / Write After
Provided
2
48 hrs when cache is 8,192 MB (4,096 MB per controller)
72 hrs when cache is 4,096 MB (2,048 MB per controller)
4,096, 8,192 MB
Read LRU / Write After
Provided
2
24 hrs when cache is 16,384 MB (8,192 MB per controller
36 hrs when cache is 8192 MB (4,096 MB per controller)
Introduction
Hitachi AMS 2100/2300 Storage System Hardware Guide
Table 1-9.
Description
AMS 2100
1
AMS 2300
1