Dell PowerVault 110T SDLT320 Gebruikershandleiding - Pagina 36
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Additional 30 minutes for each additional resonance; up to 4 resonances total.
* Air and truck profiles are specified in ASTM D4728, Standard Test Method for Random Vibration Testing of Shipping Containers.
Table 6. Operating Shock and Vibration Specifications
Pulse Shape:
Peak Acceleration:
Duration:
Application:
Type:
Sine
Frequency Range:
5 - 500 - 5 Hz
Acceleration level:
0.25 G
0.010" DA
Application:
X,Y,Z axes
Current and Power Requirements
The following table provides the applicable power requirements for both versions of the tape system. The tabletop version requires AC power.
The tape drive uses the most current (and power) during its native write modes and backward-read compatibility (BRC) read modes, so they are outlined in the table. Standby
is measured with the tape loaded and tensioned or untensioned, and Idle is measured with power on with no tape loaded. (The power drawn in these two modes is similar
enough that they are listed together.) Power-up current surges are less than those encountered during motor accelerations, and are not listed separately.
NOTE: In Table 7, the current and DC power values are relevant to the internal drive, while the AC power values are relevant to the tabletop drive.
Table 7. Current and Power Specifications
Mode
Standby / Idle
Media Loading / Unloading
8
220/320 Write—Motor Start
220/320 Write—Streaming
9
Max for SDLT Modes
8
BRC Read—Motor Start
BRC Read—Streaming
9
Max for BRC Modes
1. The Max-Peak value represents short current spikes drawn for durations of < 50µs. On the 12V supply, the peaks correspond to the pulse width modulated switching of
the motors. These values are calculated from the average of Peak-ripple-current + 2 sigma, measured at +5% DC voltage.
2. The Max-Rms value is the average of the maximum RMS current drawn during this operating mode. These values are calculated from the average of RMS current + 3
sigma, measured at nominal DC voltage.
3. The typical current is calculated from the average of all RMS current drawn during this operating mode, measured at nominal DC voltage.
4. The Max DC power is calculated from the typical DC power + 3 sigma, measured at nominal DC voltage. This value takes into account that the peak currents on the 5V
and 12V do not occur at the same time.
5. The typical DC power is calculated from the average RMS DC power drawn during this operating mode, measured at nominal DC voltage. This value also takes into
account that the peak currents on the 5V and 12V do not occur at the same time.
6. The Max AC power is calculated from the typical AC power in tabletop drives + 3 sigma.
7. The typical AC power is calculated from the average AC power drawn in external drives.
8. The motor start modes draw the most current from the 12V supply, so they are shown separately. These events last < 1 second and occur at a duty cycle of less than
25%.
9. The Max values for each mode are based on the Max-Rms values, since the peak values are of very short duration.
Tape System Recording Method
The Dell PowerVault tape drive uses the Partial Response Maximum Likelihood (PRML) 32/33 encoding method for reading and writing SDLT 320 and 220 format.
Environmental Specifications
½ sine pulse
10 G
10 ms
X,Y,Z axes, twice in each axis (once in each direction)
Sweep
Upward and downward sweep
Between 22 and 500 Hz
Between 5 and 22 Hz (crossover)
Sweep rate = 1 octave per minute
5 V Current (A)
MaxPk¹
MaxRms²
Typ³
3.2
3.0
2.9
3.8
3.1
2.9
6.1
3.1
3.0
6.3
4.3
3.8
4.3
3.9
3.0
2.8
5.2
3.3
3.1
3.3
Shock
Vibration
12 V Current (A)
MaxPk¹
MaxRms²
Typ³
0.6
0.5
0.4
4.8
1.0
0.7
4.8
1.0
0.7
2.1
0.7
0.7
1.0
2.3
0.7
0.6
1.8
0.7
0.6
0.7
DC Power (W)
AC Power (W)
4
5
6
Max
Typ
Max
20
19
34
25
24
38
25
24
33
28
27
42
28
42
23
22
38
24
22
41
24
41
7
Typ
29
33
30
38
32
33