Hitachi 9900 User Manual
21
High-performance Back-end
Design
Design
High-speed All Fibre Channel Back-end Design
Special high-performance back-end drives are available with the Hitachi Freedom
Storage
™
Lightning 9900
™
V Series. All the drives are 3.5" Low Profile (LP) 1"-height form
factor with capacities available in 36GB, 73GB, and 146GB drives. The 36GB drives spin
at 15,000RPM, and the 73GB and 146GB drives spin at 10,000RPM.
at 15,000RPM, and the 73GB and 146GB drives spin at 10,000RPM.
Each FC-AL path is driven with a dedicated processor. The diagram of a Lightning
9900 V Series ACP pair is shown in Figure 18. The Lightning 9900 V Series uses advanced
algorithms for managing performance of ACP pairs.
algorithms for managing performance of ACP pairs.
5
Figure 18 – Functional
diagram of an Array
Group with FC-AL disks.
diagram of an Array
Group with FC-AL disks.
Figure 19 – Diagram of
four ACP pairs and 32
FC-AL back-end disks
for the Lightning
9980V
four ACP pairs and 32
FC-AL back-end disks
for the Lightning
9980V
™
system.