Choosing the Right Disk Technology in a High Availability Environment DRAFT Version 2.0, August 1996

Storage
Processor
A (Std)
& Cache
(Optional)
Model 20
Storage
Processor
B (Opt)
& Cache
(Optional)
Storage
Processor
A (Std)
& Cache
(Optional)
Model 20
Storage
Processor
B (Opt)
& Cache
(Optional)
DRAFT -- Revision 2.0
August 22, 1996Page 22
Figure 5: High Availability Disk Array (HADA) with two Storage Processors using
PV Links
Advantages and Disadvantages of High Availability Disk Arrays (HADAs)
(Note: not all of these advantages and disadvantages apply to the FLDAs and SCSI
DAs)
+ smaller overall footprint for a given amount of storage