Hardware Specifications and Features

Warning: †† The SRCMRU adapter, with firmware 2.34.yy-Rzzz, is not compatible with all previous controllers and firmware versions. Do not attempt RAID Array Drive Roaming between RAID controllers that are not compatible with the SRCMRU controller. Unpredictable behavior may include, but is not limited to, data loss or corruption.

Compatible controllers include:

•SRCU42L – Firmware version 2.34.yy-Rzzz

•SRCU31LA - Firmware version 2.3x.yy-Rzzz

•SRCU31A– Firmware version 2.3x.yy-Rzzz

•SRCU32 – Firmware version 2.3x.yy-Rzzz

•SRCMRU – Firmware version 2.3x.yy-Rzzz

•SRCZCR – Firmware version 2.3x.yy-Rzzz

Note: Compatibility refers only to how data and RAID configuration information are written to the hard disks. Compatible adapters have the same data file format.

3.5Optional Features

There are no optional features for this product.

3.6RAID Controller Drive Limitations (Host, Array, Logical, and Physical)

The following are limitations assuming the following:

•U160 or U320 speed depending on the SCSI controller on the motherboard

•Dual channel SCSI controller

•Cabling that meets U160 or U320 specifications depending on the SCSI controller

Physical drives are limited by the number of SCSI channels being controlled by the RAID controller. The firmware/software supports a maximum of 15 hard disk drives per channel (or 14 if one SCSI ID is being occupied by an intelligent enclosure processor).

The maximum number of array drives is limited to 35 by the RAID firmware. The actual maximum limit of the SRCMRU RAID controller is 15, see Table 3-5. The firmware supports channel spanning where an array can consist of physical drives that are attached to either one or to both channels of the RAID controller. An array drive requires a minimum of two hard disk drives (or logical drives). Therefore the maximum array limitation for each RAID controller is the physical drive limit of that RAID controller divided by two. An array drive can contain (or have reside on it) up to a maximum of 2 host drives.

Hardware Installation and User’s Guide

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