User`s guide

Table 1–1 (Cont.) Summary of HS Array Controller Features
Feature HSJ30 HSJ40 HSD30 HSZ40
Tagged command
queuing
N/A N/A N/A Yes
Error correction code
(ECC)
Correction of
program card
firmware
Correction of
program card
firmware
Correction of
program card
firmware
Correction of
program card
firmware
Error correction code
(ECC) on cache and
shared memory
Yes Yes Yes Yes
Controller-based
exercisers for device
testing
Yes Yes Yes Yes
Active device polling Yes Yes Yes N/A
Preferred path
preservation
Yes Yes Yes N/A
Preferred ID N/A N/A N/A Yes
Random access tapes
/loaders
Yes Yes Yes N/A
Command disk
(passthrough unit)
Yes Yes Yes N/A
Direct print Yes Yes Yes Yes
Firmware code patch Yes Yes Yes Yes
Firmware code load No No No Yes
1.8 Controllers and Cache Modules Specifications
Tables 1–2, 1–3, and 1–4 list the physical and electrical specifications for the HS
array controllers and cache modules.
Table 1–2 HSJ Array Controller and Cache Module Specifications
Specification
Controller
Module
Typical
Controller
Module
Maximum
Read
Cache
16 MB
Read
Cache
32 MB
Write-Back
Cache
16 MB
Write-Back
Cache
32 MB
Width 12.5 inches N/A 12.5 inches 12.5 inches 12.5 inches 12.5 inches
Depth 9.5 inches N/A 7.75 inches 7.75 7.75 inches 7.75 inches
Power
Consumption
39.04 watts 45.58 watts 1.82 watts 2.02 watts 2.28 watts 2.48 watts
@ +5 V 6.2 A 7.1 A 360 mA 400 mA 360 mA 400 mA
@ +12 V 670 mA 840 mA 2 mA 2 mA 40 mA
1
40 mA
1
1
With fully charged batteries. If the batteries for your 16- or 32-MB write-back cache module are in a charging state, the
current at +12 V is 560 mA, which adds another 6.24 watts to the module power consumption.
1–14 Introduction to HS Array Controllers