Chapter 1: Introduction to VessRAID
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• Maximum LUNs per array: 32 logical drives (LUNs). Supports LUN carving
by allowing an array to be divided into multiple logical drives. Supports out-
of-order logical drive deletion and re-creation.
• LUN Masking and Mapping: Supports multiple hosts.
• Disk Data Formats: Supports Disk Data Format (DDF) for industry-wide
standardization and drive roaming between VTrak and VessRAID systems.
• Background Activities: Media Patrol, background synchronizing, disk array
rebuild, Redundancy Check, SMART condition pooling, Online Capacity
Expansion (OCE), RAID Level Migration (RLM). Includes priority control, rate
control, and watermarking per BGA in disk and NVRAM.
• Foreground Activities: Disk array initialization.
• Physical Drive Error Recovery: Predictive Data Migration (PDM), replaces
un-healthy disk member in array, while maintaining normal array status
during the data transition. Bad Sector Mapping, Media Patrol, SMART, Hard/
Soft Reset to recover HD from bad status, HD Power-control to recover HD
from hung status.
• Array Error Recovery: Data recovery from bad sector or failed HD for
redundant RAID, RAID 5/6 inconsistent data Prevent (Write Hole Table),
Data content Error Prevent (Read/Write Check Table) NVRAM event
logging.
• SCSI Commands: Supports extensive SCSI command set equivalent to
SCSI/FC hard disk drives. Variable sector size (512 byte to 4 KB) to break
OS 2TB limitation. 16 byte CDB support for 64-bit LBA addressing.
Management
• Supported Operating Systems: Windows 2003 Server, Windows 2008
Server, Linux (Red Hat, SuSE), Macintosh OS X, Solaris.
• Management Tools: WebPAM PROe via out-of-band Ethernet. OS
independent, localized in multiple languages, SSL Security support.
Command Line Interface (CLI) and Command Line Utility (CLU) via RJ-11
Serial Port or Telnet.
• Standard Management Protocols: SNMP and WBEM
• RAID Creation: Automatic, Express, and Advanced configuration support for
novice to skilled users.
• Management Interfaces: WebPAM PROe, CLU, CLI, audible (buzzer) and
visible (LEDs) alarms.
• Management Protocols: Embedded web server and management support—
no host agent needed. Ethernet, RJ-11 serial port, SNMP, SSL, Telnet,
Email.
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