RAID and Subsystem Architectures
Subsystem Architectures
Disk Subsystem Architecture
Multiple Ports
Allow multiple devices to SAN
FC or iSCSI etc
connect with high
bandwidth
Port Logic
Port Port Port Port Port Port Port Port
Provides physical interface
to outside world
CACHE CACHE
Cache
Provides fast response to RAID RAID
majority of I/O requests
Controller Controller
RAID Controller
Performs LUN Management
and RAID striping/mirroring
across multiple disks
Physical Disks
Storage Devices
Most Enterprise data is stored on high-end storage subsystem and these
devices deliver a very high performance, very high availability and very high
resilience of the data.
Remember that it is devices like this which are effectively holding account
information for Banking and Financial organizations, as well as just about any
piece of information in any organization. Your own bank account balance will
be held by your own bank on a number of devices such as this, so the
resilience of the data is critical, as is the more important factor of data integrity.