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IDE3/IDE4: Third/Fourth IDE connector
These connectors are for Promise PDC20265R controller only. Connect one
cable to each of the IDE connectors of the mainboard (IDE3 & IDE4
connector). Please note the color orientation of the cable before attaching it to
the mainboard. If you wish to use the IDE array controller, please refer to the
optional "Promise Raid" user's manual.
Promise PDC20265R supports striping (RAID 0) or mirroring (RAID 1),
separately.
With striping, identical drives can read and write data in parallel to
increase performance. Mirroring increases read performance through load
balancing and elevator sorting while creating a complete backup of your
files.
It offers RAID 1 mirroring (for two drives) to protect data. Should a drive
that is part of a mirrored array fail, Promise PDC20265R uses the mirrored
drive (which contains identical data) to assume all data handling. When a
new replacement drive is later installed, Promise PDC20265R rebuilds
data to the new drive from the mirrored drive to restore fault tolerance.
RAID 0 (Striping)
Configures multiple drives so that sectors of data are interleaved
within an array. When a disk member fails, it affects the entire array.
Performance is better than a single drive since the workload is
balanced between array members. This array mode is designed for
high performance systems. Identical drives are recommended for
performance as well as data storage efficiency. The disk array data
capacity is equal to the number of drive members times the smallest
member capacity.
RAID 1 (Mirroring)
Configures an array of 2 drives to write duplicate data and read in
parallel. It performs reads using advanced data handling techniques
that distribute the workload in a more efficient manner than using a
single drive. When a read request is made, it selects the drive
positioned closest to the requested data, and then looks to the idle
drive to perform the next read access.
Promise PDC20265R striped arrays can double the sustained data
transfer rate of Ultra ATA/100 drives. Promise PDC20265R fully supports
Ultra ATA/100 specification of up to 100 MB/sec per drive, depending on
individual drive specifications.
Note: Please use an 80-wire, 40-pin cable when connecting an Ultra ATA/100
hard drive to the motherboard IDE3 & IDE4 controller.
(optional)
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