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3350-A2/A2F
3350-82/B2F
or
3350-C2/C2F
(shown)
IBM 3350-A2/A2F or C2/C2F (controller and two
drives)
CONTROLLER (only one controller in a string, A2/ A2F or
C2/C2F, can be online}
•
Interprets and executes commands from the storage
control
•
Regulates the storage control and disk drive
interfaces
•
Checks data integrity by error detection and error
correction functions
•
Controls the writing and interpretation of the track
format fields
•
Furnishes status and sense information to the storage
control
•
Performs diagnostic evaluation of the 3350 storage
string
•
Serializes and deserializes data
•
Provides and controls ac power for the entire storage
string (A2/ A2F only)
DRIVES (A2/A2F, or C2/C2F has two independent drives)
•
Responds to commands from the controller
•
Positions access mechanism at a physical cylinder
•
Selects the read
I
write head
•
locates a specified sector on a selected track
•
Reads or writes data
•
Provides safety and service information for evaluation
Figure I. IBM 3350 Disk Storage
2 IBM 3350 Reference Manual
IBM 3350-B2/B2F (two drives)
e
Responds to commands from the controller
e
Positions access mechanism at a physical cylinder
•
Selects the read
I
write head
•
locates a specified sector on a selected track
•
Reads or writes data
•
Provides safety and service information for evaluation
IBM 3350-A2F, B2F, and C2F Models
•
Native Mode - provides 1, 144 kilobytes of fixed head
storage per drive with zero seek time.
•
Compatibility Mode - provides 742 kilobytes of fixed
head storage per drive with zero seek time.
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