Deskstar (DALA-3540)
Product description |
Model: DALA-3540 |
Features |
| |
- 528, or 541MB formatted capacity (512 byte/sector), chosen
by jumper
- PIO data transfer - mode 3 (max 11.1 Mb/s)
- 48.7 Mb/s (OD) media data rate
32.2 Mb/s (ID) media data rate
- Average seek time 12ms (Read)
- 4500 RPM
- 96 KB three segment sector buffer
- Read ahead caching with LFU (Least frequently used) segment
update
- Industry standard mounting.
- The drive can be mounted with any of its six surfaces facing
down
- Advanced ECC on the fly
- CHS and LBA addressing modes
- Power saving modes
- Robust design for EMC/RFI
- MR (Magneto Resistive) head technology
- No-ID(TM) sector format
- MTBF 350,000 hours
|
DC power requirements |
| |
| The following voltage specifications
apply at the drive power connector. Damage to the drive electronics
may result if the power supply cable is connected or disconnected
while power is being applied to the drive (No hot plug/unplug is
allowed). There are inductive loads in the drive which could cause
destructively high voltage spikes on the drive if the power
connection is opened. There is no special power on/off sequencing
required. |
| Nominal supply voltages |
+5 Volts |
+12 Volts |
| Maximum ripple (0-10 MHz) |
100mV p-p |
150mV p-p |
| Voltage supply tolerance
(including ripple) |
+/-5% |
+10%/-8% |
Power supply current (Amps) |
|
|
| Start
peak |
0.50 |
0.52 |
| Idle
average |
0.18 |
0.14 |
| R/W
average |
0.49 |
0.17 |
|
During the drive start up and seeking,
12 volt ripple is generated by the drive (referred to as dynamic
load-ing). If several drives have their power daisy chained
together, then the power supply ripple plus other drive's dynamic
loading must remain within the regulation tolerance of +10/-8%. A
common supply with separate power leads to each drive is a more
desirable method of power distribution.
To prevent external electrical noise
from interfering with the drive's performance, the drive must be
held by four screws in a user system frame which has no electrical
level deference at the four screws position, and has less than
+/-300 millivolts peak to peak level deference to the drive power
connector ground. |
Operating environment |
Operating conditions |
| Temperature |
5 to 55
degrees C* |
| Relative
humidity |
8 to 90%
non-condensing |
| Maximum wet bulb
temperature |
29.4 degrees C
non-condensing |
| Maximum
temperature gradient |
15 degrees
C/Hour |
| Altitude |
-300 to 3000m |
|
Non-operating conditions |
| Temperature (shipping) |
-40 to 65 degrees C |
| Temperature (storage) |
0 to 65 degrees C |
| Relative humidity |
5 to 95% non-condensing |
| Maximum wet bulb temperature |
35 degrees C non-condensing |
| Altitude |
-300 to 12,000m |
|
Note:
The system is responsible to provide sufficient air movement to
maintain surface temperature below 60 degrees C at the center of top
cover of the drive. |
Operating shock |
The hard disk drive meets the following
criteria while operating in respective conditions described below.
The shock test consists of ten shocks inputs in each axis and
direction for total of 60. There must be a delay between shock
pulses, long enough to allow the drive to complete all necessary
error recovery procedure. |
No errors
5 G, 11ms half-sine shock pulse.
No data loss, seek errors or
permanent damage
10 G, 11ms half-sine shock pulse.
No data loss or permanent damage
15 G, 5ms half-sine shock pulse
30 G, 4ms half-sine shock pulse |
|
|
