Deskstar DJAA
Product description
Models: DJAA-31270 and DJAA-31700
Features
- Read ahead of LFU cache algorithm
- Industry standard mounting
The drive can be counted with any of its six surfaces facing
down
- Advanced ECC on the fly (EOF)
- CHS and LBA addressing modes
- Power saving modes
- Robust design for EMC/RFI
- MR (Magneto Resistive) head technology
- No ID sector format
Configuration
| Interface |
IDE |
| Formated capacity |
1270/1700 MB *1 |
| Sector size |
512 Bytes |
| Sectors / track (logical) |
63 |
| Head number (logical) |
16 |
| Cylinder number (logical) |
2480/3308 |
| Customer usable data sectors |
2499840/3334464 |
| Disks |
2/2 |
| Data bands |
8 |
| Areal density average (max) |
662 Mb/sq in |
| Recording density (max) |
99.1 KBPI |
| Track density |
6684 TPI |
Performance
| Rotational speed |
4500 RPM |
| Media transfer rate |
38.7 - 62.1 Mbits/sec |
| Data buffer |
96 KB |
| Interface transfer rate (max) |
16.6 MB/sec |
| Latency average |
6.7 msec |
| Seek time (typical) |
|
| Average (read) |
12 msec |
| Track to track |
3.1 msec |
| Full track (read) |
25 msec |
| Spin up (typical) |
10 sec |
Power
| Requirements |
+5 VDC +/-5% *2 |
| Power supply ripple (0-20 Mhz) max |
100 mV p-p *3 |
| Dissipation (typical) |
|
| Idle |
0.32 A RMS |
| Read/Write |
0.45 A RMS |
| Seek |
0.40 A RMS |
| Start up (average to ready) |
0.55 A RMS |
| Supply rise time |
7 - 100 msec |
Dimensions
| Height |
25.4 mm |
| Width |
101.6 mm |
| Depth |
146.0 mm |
| Weight |
530 g |
Environmental characteristics
Altitude
| Operating |
-300 to 3000 m |
| Ship / store |
-300 to 12000 m |
Temperature *4
| Operating |
5 to 55 C |
| Storage |
0 to 65 C |
| Shipping |
-40 to 65 C |
| Temperature gradient (max) |
15 C / hour |
| (Operatingstorage or shipping) |
|
Operating
| Relative humidity (non-condensing) |
8% to 90% |
| Maximum wet bulb (non-condensing) |
29.4 C |
| Shock |
*5 |
| Vibration random |
*7 |
Non-Operating
| Relative humidity (non-condensing) |
5% to 95% |
| Maximum wet bulb (non-condensing) |
40 C |
| Shock |
*6 |
| Vibration random |
*7 |
Notes:
- 1 MB = 1000000 bytes
- The drive shall not incur damage for an over voltage
condition of +25% (maximum duration of 20ms) on the 5 V
nominal supply.
- The maximum supply ripple is measured at the 5 V input on
the drive.
- The system is responsible for providing sufficient air
movement to keep the surface temperature, measured at the
center of the drive's top cover, below 60 C.
- The drive will withstand, with no hard error, a 5 G
half-sine wave shock pulse for a 11 ms duration. The drive
will experience no data loss or permanent damage during
idle, seek or read modes when experiencing no more than a
shock pulse of 10 G half-sine wave for a 11 ms duration.
- The drive will withstand, with no permanent damage or
degradation in performance, a 75 G half-sine wave shock
pulse of 11 ms duration.
- Due to the complexity of this subject, we recommend that
users contact support
to discuss how to perform the necessary measurements if they
believe this to be an area which requires evaluation.
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