Promise Technology 15110 user manual Specifications, Raid

	Chapter 1: Introduction
Feature	Benefit
Cluster support	Supports two-node server clusters for
	performance and availability.
Complete cable-less design	All components easily plug directly into
	boards. No cables to complicate setup or
	maintenance.
Cache battery backup	72-hour backup for controller cache to retain
	data in case of power failure.
Command-line and Graphic-user	Choice of control and monitoring methods
interfaces	for greater flexibility.

Specifications

Drive Capacity: 15 SATA and PATA disk drives (3.5" x 1" form factor only)

External I/O Ports: Dual Ultra 160 SCSI with 68-pin VHDCI connections

Sustained Throughput: Up to 200 MBps (over two iSCSI ports)

Sustained I/Os: Up to 20,000 I/Os per second

Data Cache: Up to 512MB predictive data cache with automatic write cache destaging and 72-hour battery backup protection (256 MB, standard)

Supported RAID Levels:

•	RAID 0	•	RAID 1	•	RAID 3
•	RAID 5	•	RAID 10	•	RAID 50

Any combination of these RAID levels can exist at once on separate logical drives. See page 207 for more information on RAID.

RAID Flexibility: Configurable RAID stripe size – 4,8,16,32 or 64 sectors per disk.

Rebuild priority tuning: Adjustment of minimum I/O reserved for server use during rebuild.

Hot-spares: Multiple global and designated hot spares.

Maximum Disks & LUNs: 15 in any combination of RAID levels and drive types.

Supported Disk Interfaces: Serial ATA (SATA), Parallel ATA (with optional Promise adapter).

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