Справочник Пользователя для Seagate ST9500620SS
Constellation.2 SAS Product Manual, Rev. H
25
Table 3:
500GB drive (Standard & SED model)
DC power requirements
[1] Measured with average reading DC ammeter.
[2] Instantaneous +12V current peaks will exceed these values.
[3] Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.
[4] For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching
[2] Instantaneous +12V current peaks will exceed these values.
[3] Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.
[4] For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching
7,200 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been
completed and that the drive is able to accept selection by the host initiator.
completed and that the drive is able to accept selection by the host initiator.
[5] See +12V current profile in Figure 1.
[6] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the
[6] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the
Notify Spinup primitive.
[7] See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and
transient response.
[8] Operating condition is defined as random 8 block reads.
[9] During idle, the drive heads are relocated every 30 seconds to a random location within the band from
[9] During idle, the drive heads are relocated every 30 seconds to a random location within the band from
three-quarters to maximum track.