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The Storage Array is a rack-mounted, just a bunch of disks (JBOD), hard disk array that interfaces with host systems through an Ultra2 LVD SCSI bus. The backplane can be configured as two buses to serve two host systems or as a single bus to provide more drive and disk capacity to a single host.
The Storage Array enclosure supports up to six hot-swappable hard disk drives, two hot-swappable power supply modules (AC or DC), and three hot-swappable fan modules. The system includes a Versatile Environmental Monitor (VEM) that monitors enclosure temperature, power supplies, and cooling fan status. The VEM reports to the host system through an in-band SCSI bus with support for SCSI Accessed Fault Tolerant Enclosure (SAF-TE) and SCSI Enclosure Services (SES) protocols. A list of Storage Array features is included in Appendix A.
The Storage Array ships with the following hardware components:
The Storage Array enclosure chassis can be front-mounted on a 19-inch (48.26-cm) wide equipment rack. The backplane has no active components and supports hot swapping for three ACMs, two PSUs (either AC or DC), a VEM, and an I/O module with two Very High Density Connector Interface (VHDCI) connectors. The backplane can configure itself automatically as follows:
For further descriptions of bus configurations, see "Configuring the Storage Array."
The I/O module has two Very High Density Connector Interface (VHDCI) connectors, and is locked into the chassis by turning a lead-screw with a key.
Disk drives are mounted on disk drive carriers that can accommodate 1.6-inch (4.06-cm) or 1-inch (2.54-cm) SCA-2 direct attach disk drives. The Storage Array supports hot swapping and blind mating. A disk drive carrier is shown in Figure 1-5.
Each disk drive carrier has two LEDs that indicate device activity and device fault. The disk drive controls the green activity LED. The VEM module controls the red fault LED. See "Environmental Monitoring and LED Diagnostics," for LED functional descriptions.
The disk drive carrier supports the following disk drive types:
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Caution All disk drive bays must have a disk drive or a drive carrier blank installed to maintain the proper airflow. |
The Storage Array can be powered with either DC or AC power supplies, and ships with one AC power supply for normal operation. A second power supply can be added as an option to provide redundancy to the power system. Power supplies are hot-swappable.
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Caution When only one power supply is installed, a power supply blank must be installed in the second bay to maintain the proper airflow in the chassis. |
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Caution Do not insert AC and DC power supplies in the same chassis at the same time. |
Each power supply has two LED status indicators on the front of the power supply unit. See "Environmental Monitoring and LED Diagnostics," for LED descriptions and "Technical Specifications and Regulatory Compliance," for further information on AC and DC power supplies.
The Storage Array ships with three hot-swappable, variable-speed
Advanced Cooling Modules (ACMs). Two ACMs are required for normal operation, whereas the third provides redundancy to the cooling system. The VEM monitors the fan speed and sets the ACM fan speed according to the ambient temperature and the number of operational ACMs. The fan speed is set to high if the VEM detects one or more nonoperating ACMs or a failed power supply.
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Note The fans default to high speed in a Storage Array without a VEM. |
Each ACM unit has a red LED fault indicator located on the ACM assembly, as shown in Figure 1-7.
See "Environmental Monitoring and LED Diagnostics," for complete information on the Versatile Environmental Monitor (VEM).
For service and support for a product purchased from a reseller, contact the reseller. Resellers offer a wide variety of Cisco service and support programs, which are described in the information packet shipped with the Storage Array.
If you purchased your product from a reseller, you can access Cisco Connection Online (CCO) as a guest. CCO is Cisco Systems' primary, real-time support channel. Your reseller offers programs that include direct access to CCO's services.
For service and support for a product purchased directly from Cisco, use CCO.
Posted: Mon Aug 28 18:01:03 PDT 2000
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