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Chapter 1: Introduction to VTrak
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External I/O Ports (per controller): Dual 4-Gb Fibre Channel host port; One
external 3 Gb/s SAS x4 ports for JBOD expansion (up to four VTrak JBOD
Systems).
Data Cache: Shared 512 MB predictive data cache (expandable to 2 GB);
Automatic write cache destaging; 72-hour battery backup (for 512 MB cache).
Command Queue Depth: 512 commands per VTrak system (up to 1024
commands with 512 MB memory).
Operational Features
RAID Levels: RAID 0, 1, 1E, 5, 6, 10, 50, and 60 – Any combination of these
RAID levels can exist at the same time.
Configurable RAID stripe size: 64 KB, 128 KB, 256 KB, 512 KB, and 1 MB stripe
size per logical drive.
Background task priority tuning: Adjustment of minimum I/O reserved for server
use during all background tasks.
Hot spares: Multiple global or dedicated hot-spare drives with revert option.
Maximum LUNs per subsystem: 256 in any combination of RAID levels.
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.
Max LUNs per Target ID: Up to 256, depending on host side driver and operating
system.
LUN Masking and Mapping: Supports multiple hosts.
Disk Data Formats: Supports Disk Data Format (DDF) for industry-wide
standardization and drive roaming between VTrak 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.
Summary of Contents for E310f
Page 1: ...VTRAK E Class E310f and E310s PRODUCT MANUAL Version 1 1 ...
Page 14: ...VTrak E Class Product Manual xiv ...
Page 22: ...VTrak E Class Product Manual 8 ...
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Page 61: ...Chapter 4 Management with WebPAM PROe 47 Figure 1 The WebPAM PROe log in screen ...
Page 218: ...VTrak E Class Product Manual 204 ...
Page 234: ...VTrak E Class Product Manual 220 Figure 13 Replacing the VTrak controller ...
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