WD Enterprise WDE2170/WDE4360 | Specifications |
2.4.3. Input Voltage Requirements
The input voltage requirements for the WDE2170 and WDE4360 are as follows:
+ 5V ± 5% and + 12V ± 5%
2.4.4. Ripple
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| +12 VDC |
| +5 VDC |
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Maximum | Start: 400 mV |
| 100 mV |
| Run: 150 mV |
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Frequency |
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2.4.5. Bring-Up Sequence
After power is applied, the following events occur as the drive becomes ready for use.
Note: Typical spindle start time appears in Table
1.The microprocessor tests itself, the
2.The SCSI interface is enabled to accept the following commands: Inquiry, Request Sense, Start/Stop Unit, Test Unit Ready. Refer to the Western Digital SCSI Implementation Guide (document number
3.Internal electronic component initialization and testing continues.
4.If the Auto Start option is enabled, the motor spins up.
5.The servo system calibrates itself.
6.Additional configuration information is read from an area on the disk that is reserved for the drive’s internal use.
7.A self test is performed on the read/write path.
8.The drive is ready to read and write data.
If an error occurs during the
If a reassign was in progress when the drive was turned off, the drive automatically completes that operation during startup.
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