1
Introducing the SA7x Enclosure
This chapter is an overview of the SA7x enclosure, lists SA7x configurations and
specifications, and discusses user precautions.
1.1 SA7x Enclosure Overview
The term ‘‘SA7x’’ refers to the family of enclosures that includes:
• The SA70—Accommodates one to four RA70 disk drives (280 MB each)
• The SA71—Accommodates one to four RA71 disk drives (700 MB each)
• The SA72—Accommodates one to four RA72 disk drives (1 GB each)
• The SA73—Accommodates one to four RA73 disk drives (2 GB each)
For all of these designations, the enclosure itself is physically identical. What
differentiates an SA70 enclosure from an SA71 enclosure is the type of drives
installed in each (RA70s and RA71s). See Figure 1–1 for an illustration of an
SA7x enclosure.
Table 1–1 lists the the types of disk drives that are authorized for installation in
each SA7x enclosure.
Table 1–1 Authorized Disk Drive Installations
Enclosure
RA70
RA71
RA72
RA73
SA70
Yes
No
No
No
SA71
Yes
Yes
Yes
Yes
1
SA72
Yes
Yes
Yes
Yes
1
SA73
Yes
Yes
Yes
Yes
1
A maximum of three drives may be installed.
The SA7x enclosure provides mounting space, power, cooling, and control for up
to four RA7x disk drives. Each disk drive is independently powered and operated
by the enclosure.
The enclosure is installed as a component in a storage array cabinet.
The RA7x disk drive used in the SA7x enclosure is a random-access Winchester
technology drive with a formatted storage capacity of 280 MB to 2 GB. The drive
features modular components that can be replaced with minimum down time.
Figure 1–2 shows an RA70 disk drive. Figure 1–3 shows an RA71 through RA73
disk drive.
Introducing the SA7x Enclosure 1–1
