The Memory Hierarchy
Main Memory Disk Tape
Volatile
limited address
spaces
expensive
average access
time:
10-100 nanoseconds
5-10 MB/S
transmission rates
2-10 GB storage
average time to
access a block:
10-15 msecs.
Need to consider
seek, rotation,
transfer times.
Keep records “close”
to each other.
1.5 MB/S transfer rate
280 GB typical
capacity
Only sequential access
Not for operational
data
Previous slide
Next slide
Back to first slide
View graphic version