|
Fireball TM 1.2S
Technical Specifications
|
Model
(by Capacity) |
Quantum
Fireball
TM 1.2S |
Drive Format:
Formatted Capacity *note1
Total Logical Blocks
Physical Heads
Physical Disks |
1,281.9 MB
2,503,872
2
1 |
Access Time:
Average Seek Time |
12.0 ms |
|
Buffer Size |
128K *note
2 |
|
Field MTBF (POH) |
400,000
(Projected) |
Dimensions:
Height (inches)
Width (inches)
Depth (inches) |
1.00
4.00
5.75 |
Power Consumption:
Idle
Typical (40% seek) |
3.71 W
6.42 W |
|
Operating Temperature |
0°–55°C |
*note 1 - Quantum defines a
megabyte (MB) to be 1,000,000 bytes.
*note 2 - The upper 32K contains the drive firmware, while the
balance (96K) is allocated to hold
the data. |
3.5-INCH DISK DRIVE SCSI
CONFIGURATION
The following paragraphs provide SCSI jumper and terminating
resistor information. There are two types of jumper configurations
for the 3.5-inch drives: SCSI drives with five jumpers and seven
jumpers.
3.1.1 Five-Jumper Configuration
There are five jumper selections on the Quantum Trailblazer 420S
and 850S and the Quantum Fireball 540S, 640S, 1080S, and 1280S
hard drive printed circuit boards (the Quantum Fireball TM 1.0S,
2.1S, and 3.2S have only four jumper positions—there is no PK
jumper). Typical circuit board locations are shown in Figure 3-1. The
black jumper body indicates that a jumper is installed (the setting is
ON). The SCSI bus Termination Enable (TE) jumper enables SCSI bus
active termination on the drive when installed (TE=1). Only the two
SCSI devices (including the SCSI host adapter) located at the ends of
the SCSI bus should have termination enabled. When removed (PK
position may be used to store the jumper), the termination circuit is
disabled. In the disabled mode, each individual SCSI bus is
electrically isolated from the termination source. This method makes
termination easier to configure.
The SCSI address jumpers are described in Table 3-1. |
3.5-Inch Five-Jumper Locations and Settings
A2 = Address 2
A1 = Address 1
A0 = Address 0
TE = Termination Enable |
CAUTION: Verify that no two drives on
the SCSI bus have the same address
(see Table 3-1 for drive address information). |
Table 3-1 SCSI Jumpers
| SCSI
Address Jumpers |
SCSI ID |
| A2 |
A1 |
A0 |
|
| OFF |
OFF |
OFF |
0 |
| OFF |
OFF |
ON |
1 |
| OFF |
ON |
OFF |
2 |
| OFF |
ON |
ON |
3 |
| ON |
OFF |
OFF |
4 |
| ON |
OFF |
ON |
5 |
| ON* |
ON* |
OFF* |
6* |
| ON |
ON |
ON |
7 |
| * Indicates
the default jumper settings (SCSI Address = 6). |
|
