ESDI Disk Drive Preparation
4.2.4 SPINDLE CONTROL
Most ESDI drives can be jumpered so that either (1) the drive spins
up whenever power is applied or (2) the drive spins up under
control of the MD21.
Emulex recommends that drives always be
jumpered to spin up under control of the MD21.
4.2.5 DRIVE SECTORING AND OTHER OPTIONS
The MD21 supports both hard-sectored and soft-sectored drives.
Table 4—1 lists the drives supported by the MD21.
This list
contains every drive that Emulex has tested to conform to the
timing requirements for both the Emulex ESDI-to-SCSI disk
controllers and the ESDI specification. Note that specific revision
levels are listed for each model of drive.
Different revision
levels of the same drive can sometimes be significantly different.
The drives in this list have not been verified against their own
specifications for these parameters: soft/hard error rates,
temperature, vibration, humidity, MTBF, MTTR, and others.
Some drives give substantially better performance when they are
hard-sectored.
These drives are listed in Table 4-1 and Emulex
strongly recommends running these drives in hard-sectored mode if
possible .
All the parameters listed in Table 4-1 are fully defined in the
section following the table.
4-2 Drive Configuration Parameters
Summary of Contents for MD21/S2
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