Storage Subsystem; Storage Cages - Compaq AlphaServer ES45 1B Owner's Manual

1.11 Storage Subsystem

The system chassis can house up to two universal storage disk cages.
The storage subsystem supports "hot pluggable" hard disk drives that
can be replaced while the storage backplane is powered and operating.
You can install up to six 1-inch universal hard drives in each storage disk cage.
See Chapter 4 for installation and swap procedures.
Figure 1–12 Storage Cages
MR0046A
System Overview 1-23