Specifications

84 IBM Power 770 and 780 Technical Overview and Introduction
򐂰 The disk drives are required to be in RAID arrays.
򐂰 There are no separate SAS cables required to connect the two embedded SAS RAID
adapters to each other. The connection is contained within the backplane.
򐂰 RAID 0, 10, 5, and 6 support up to six drives.
򐂰 Solid-state drives (SSD) and HDDs can be used, but can never be mixed in the same
disk enclosure.
򐂰 To connect to the external storage, you need to connect to the #5886 disk drive enclosure.
Figure 2-25 shows the topology of the RAID mode.
Figure 2-25 RAID mode (external disk drives option)
2.9.4 DVD
The DVD media bay is directly connected to the integrated SAS controller on the I/O
backplane and has a specific chip (VSES) for controlling the DVD LED and power. The VSES
appears as a separate device to the device driver and operating systems (Figure 2-22 on
page 81).
Because the integrated SAS controller is independent from the two SAS disk/SSD controllers,
it allows the DVD to be switched between multiple partitions without impacting the
assignment of disks or SSDs in the CEC enclosure.
P7IOC
Integrated
SAS Adapter
P7IOC
DVD
DASD
DASD
DASD
VSES
Redriver
Integrated
SAS Adapter
Integrated
SAS Adapter
Redriver
SAS Port Exp.
A
SAS Port Exp.
B
Optional
Battery
Optional
Battery
External Port