Specifications

2.11.1 SA550 Storage Array Configurations
Table 2–2 lists the three authorized SA550 storage array configurations
HA/HD, JA/JD, and UA/UD that comply with DSA requirements and that
can be used with any SDI controller protocol and cable.
Table 2–2 SA550 Storage Array Configurations
SA550
Model
SA7x
Enclosures
RA7x
Disk
Drives
RA82
Disk
Drives
Power
Controller Voltage
Storage
Capacity
SA550–HA
SA550–HD
1 4 2 881A
881B
120 Vac
240 Vac
2.37 GB
SA550–JA
SA550–JD
2 8 3 881A
881B
120 Vac
240 Vac
4.11 GB
SA550–UA
SA550–UD
0 0 0 881A
881B
120 Vac
240 Vac
0.0 GB
The UA/UD configuration is unique in that it is specifically designed for the
installation of RA82 disk drives at the customer’s site in a cabinet with SA7x
enclosures. The RA82 disk drives must be installed before any SA7x enclosures
are installed. Therefore, the UA/UD models are shipped without any storage
devices installed. The installation sequence for the SA550 storage array is shown
in Table 2–3.
Table 2–3 SA550 Add-On Installation Sequence
RA82 Installation Location SA7x Installation Location
First RA82
Second RA82
Third RA82
SA550 level 2
SA550 level 1
SA550 level 0
First SA7x
Second SA7x
SA550 top left
SA550 top right
CAUTION
Do not install any SA7x enclosures in an SA550 storage array until the
RA82 fixed disk drives are installed.
2.11.2 SA550 Storage Array Specifications
Tables 2–4 through 2–7 list the physical and electrical specifications for the
SA550 storage array. Refer to Table 2–1 for a listing of the environmental
specifications. For the SA7x and RA82 specifications, see the SA7x Enclosure
User Guide and the RA82 Disk Drive User Guide.
Storage Array Descriptions 2–5