Seagate ST9600005SS ユーザーズマニュアル
26
Savvio 10K.5 SAS Product Manual, Rev. D
[5]
This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup
primitive.
primitive.
[6]
See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient
response.
response.
[7]
Operating condition is defined as random 8 block reads.
[8]
During idle, the drive heads are relocated every 30 seconds to a random location within the band from three-quarters
to maximum track.
to maximum track.
General DC power requirement notes.
1.
Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current
shown.
shown.
2.
The +5V and +12V supplies should employ separate ground returns.
3.
Where power is provided to multiple drives from a common supply, careful consideration for individual
drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak
starting current must be available to each device.
drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak
starting current must be available to each device.
4.
Parameters, other than spindle start, are measured after a 10-minute warm up.
5.
No terminator power.
7.3.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a defined frequency. Maximum
allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.
allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.
7.3.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.
and down.
+5v
=
250 mV pp from 100 Hz to 20 MHz.
+12v
=
450 mV pp from 100 Hz to 100 KHz.
250 mV pp from 100 KHz to 20 MHz.
150 mV pp from 20 MHz to 80 MHz.