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ACTi PSTR-0201 User Manual

USB and eSATA to SATA II
RAID Subsystem
User Manual
Revision 1.3
Table of Contents
Preface ............................................................................................................ 5
Before You Begin .......................................................................................... 6
Safety Guidelines................................................................................................................................................................... 6
Controller Configuration .................................................................................................................................................... 6
Packaging, Shipment and Delivery ................................................................................................................................ 6
Unpacking the Subsystem................................................................................................................................................. 7
Chapter 1 Introduction ............................................................................. 8
1.1 Key Features ................................................................................................................................................................. 9
1.2 Identifying Parts of the RAID Subsystem .......................................................................................................10
1.2.1 Front View ..........................................................................................................................................................10
1.2.1.1 Disk Trays ...................................................................................................................................................11
1.2.1.2 LCD Front Panel ......................................................................................................................................12
1.2.2 Rear View ............................................................................................................................................................13
1.3 Technical Specifications .........................................................................................................................................15
1.4 RAID Concepts ..........................................................................................................................................................16
1.5 Array Definition .........................................................................................................................................................21
1.5.1 Raid Set ...............................................................................................................................................................21
1.5.2 Volume Set ........................................................................................................................................................21
1.5.3 Easy to Use Features .....................................................................................................................................22
1.5.3.1 Instant Availability/Background Initialization ..............................................................................22
1.5.3.2 Array Roaming .........................................................................................................................................22
1.5.3.3 Online Capacity Expansion .................................................................................................................22
1.3.3.4 Online RAID Level and Stripe Size Migration .............................................................................23
1.5.4 High Availability .............................................................................................................................................24
1.5.4.1 Creating Hot Spares...............................................................................................................................24
1.5.4.2 Hot-Swap Disk Drive Support ...........................................................................................................24
1.3.4.3 Hot-Swap Disk Rebuild .........................................................................................................................24
Chapter 2 Getting Started ...................................................................... 25
2.1 Preparing the Subsystem and Powering On ................................................................................................25
2.2 Installing Hard Drives .............................................................................................................................................25
Chapter 3 RAID Configuration .............................................................. 27
3.1 Configuring Through a Terminal ........................................................................................................................27
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3.3 Menu Diagram ..........................................................................................................................................................33
3.4 Web browser-based Remote RAID management via R-Link Port .......................................................39
3.5 Quick Create ..............................................................................................................................................................41
3.6 Raid Set Functions ...................................................................................................................................................42
3.6.1 Create Raid Set .................................................................................................................................................42
3.6.2 Delete Raid Set .................................................................................................................................................43
3.6.3 Expand Raid Set ...............................................................................................................................................44
3.6.4 Offline Raid Set ................................................................................................................................................46
3.6.5 Activate Incomplete Raid Set .....................................................................................................................47
3.6.6 Create Hot Spare .............................................................................................................................................49
3.6.7 Delete Hot Spare .............................................................................................................................................49
3.6.8 Rescue Raid Set ................................................................................................................................................50
3.7 Volume Set Function .............................................................................................................................................51
3.7.1 Create Volume Set ..........................................................................................................................................51
3.7.2 Delete Volume Set ..........................................................................................................................................54
3.7.3 Modify Volume Set .........................................................................................................................................55
3.7.3.1 Volume Expansion ..................................................................................................................................56
3.7.4 Volume Set Migration ...................................................................................................................................56
3.7.5 Check Volume Set ............................................................................................................................................57
3.7.6 Stop Volume Set Check ................................................................................................................................58
3.8 Physical Drive ...........................................................................................................................................................59
3.8.1 Create Pass-Through Disk ............................................................................................................................59
3.8.2 Modify Pass-Through Disk ...........................................................................................................................60
3.8.3 Delete Pass-Through Disk ............................................................................................................................61
3.8.4 Identify Selected Drive ..................................................................................................................................61
3.9 System Controls ......................................................................................................................................................62
3.9.1 System Configuration .....................................................................................................................................62
3.9.2 iSCSI Configuration .........................................................................................................................................65
3.9.3 EtherNet Config................................................................................................................................................66
3.9.4 Alert By Mail Config .......................................................................................................................................68
3.9.5 SNMP Configuration ......................................................................................................................................69
3.9.6 NTP Configuration ...........................................................................................................................................70
3.9.7 View Events/Mute Beeper ............................................................................................................................71
3.9.8 Generate Test Event ........................................................................................................................................72
3.9.9 Clear Event Buffer ............................................................................................................................................73
3.9.10 Modify Password ...........................................................................................................................................74
3.9.11 Upgrade Firmware .........................................................................................................................................74
3.9.12 Shutdown Controller ...................................................................................................................................75
3.9.13 Restart Controller ..........................................................................................................................................75
3.10 Information Menu ................................................................................................................................................76
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3.10.1 RaidSet Hierarchy ...........................................................................................................................................76
3.10.2 System Information .......................................................................................................................................78
3.10.3 Hardware Monitor .........................................................................................................................................79
3.11 Creating New Raid Set or Reconfiguring an Existing Raid Set ..........................................................80
3.12 Upgrading the Firmware ......................................................................................................................................81
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Preface
About this manual
This manual provides information regarding the quick installation and hardware features of the RAID subsystem. This document also describes how to use the storage management software. Information contained in the manual has been reviewed for accuracy, but not for product warranty because of the various environment/OS/settings. Information and specifications will be changed without further notice.
This manual uses section numbering for every topics being discussed for easy and convenient way of finding information in accordance with the user’s needs. The following icons are being used for some details and information to be considered in going through with this manual:
Copyright
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent.
Trademarks
All products and trade names used in this document are trademarks or registered trademarks of their respective holders.
Changes
The material in this document is for information only an d is subject to change without notice.
NOTES:
These are notes that contain useful information and tips that the user must give attention to in going through with the subsystem operation.
IMPORTANT!
These are the important information that the user must remember.
WARNING!
These are the warnings that the user must follow to avoid unnecessary errors and bodily injury during hardware and software operation of the subsystem.
CAUTION:
These are the cautions that user must be aware to prevent damage to the equipment and its components.
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Before You Begin
Before going through with this manual, you should read and focus to the following safety guidelines. Notes about the subsystem’s controller configuration and the product packaging and delivery are also included.
Safety Guidelines
To provide reasonable protection against any harm on the part of the user and to obtain maximum performance, user is advised to be aware of the following safety guidelines particularly in handling hardware components:
Upon receiving of the product:
Place the product in its proper location. To avoid unnecessary dropping out, make sure that somebody is around for
immediate assistance.
It should be handled with care to avoid dropping that may cause damage to the
product. Always use the correct lifting procedures.
Upon installing of the product:
Ambient temperature is very important for the installation site. It must not exceed
30˚C. Due to seasonal climate changes; regulate the installation site temperature making it not to exceed the allowed ambient temperature.
Before plugging-in any power cords, cables and connectors, make sure that the
power switches are turned off. Disconnect first any power connection if the power supply module is being removed from the enclosure.
Outlets must be accessible to the equipment. All external connections should be made using shielded cables and as much as
possible should not be performed by bare hand. Using anti-static hand gloves is recommended.
In installing each component, secure all the mountin g screws and locks. Make sure
that all screws are fully tightened. Follow correctly all th e listed procedures in this manual for reliable performance.
Controller Configuration
This RAID subsystem supports single controller configuration.
Packaging, Shipment and Delivery
Before removing the subsystem from the shipping carton, you should visually
inspect the physical condition of the shipping carton.
Unpack and verify that the contents of the shipping carton are complete and in
good condition.
Exterior damage to the shipping carton may indicate that the contents of the
carton are damaged.
If any damage is found, do not remove the components; contact the dealer where you purchased the subsystem for further instructions.
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Unpacking the Subsystem
The package contains the following items:
RAID Subsystem Unit
USB and eSATA to SATA II RAID Subsystem
Two (2) power cords
One(1) RJ45 Ethernet cable
One(1) external serial cables RJ11-to-DB9
One(1) USB Cable
Two(2) external SATA cable
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NOTE: If any damage is found, contact the dealer or vendor for assistance.
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Chapter 1 Introduction
The RAID Subsystem
Unsurpassed Value
Most cost-effective SATA II RAID Subsystem
Application Flexibility
Multiple interface, extends useful life by adapting to future IT requirements
Easy Installation, upgrade & Maintenance
Provide a fast and easy way to install and upgrade the storage. Simplified
maintenance reduces ongoing IT labor costs.
Exceptional Manageability
Graphical User Interface (GUI) provides easy way for users to remotely manage
and configure the storage
Menu-driven interface make user a convenient way to maintain the storage by
locally LCD front console
Green Power Concept
Saves power by adopting the new technology “MAID” (Massive Arrays of Idle
Disks).
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1.1 Key Features
Subsystem Features:
USB 2.0 (480Mbps) / eSATA (3Gbps) / iSCSI (AoE) Multiple Volumes for host access Over 2TB support Supports hot spare and automatic hot rebuild Allows online capacity expansion within the enclosure Local audible event notification alarm Supports password protection Ethernet Port interface for remote event notification eSATA Support NCQ 32 Command, USB & iSCSI TCQ 256 Command Transparent data protection for all popular operating systems
RAID Management:
Smart-function LCD panel Environmental monitoring unit Real time drive activity and status indicators Web-based GUI management utility
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1.2 Identifying Parts of the RAID Subsystem
The illustrations below identify the various parts of the subsyst em.
1.2.1 Front View
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1.2.1.1 Disk Trays
HDD Status Indicator
USB and eSATA to SATA II RAID Subsystem
Part
HDD Activity LED
HDD Fault LED
Lock Indicator
Every Disk Tray is lockable and is fitted with a lock indicator to indicate whether or not the tray is locked into the chassis or not. Each tray is also fitted with an ergonomic handle for easy tray removal.
When the Lock Groove is horizontal, this indicates that the Disk Tray is locked. When the Lock Groove is vertical, then the Disk Tray is unlocked.
This LED will blink blue when the hard drive is being accessed.
Green LED indicates power is on and hard drive status is good for this slot. If hard drive is defective or failed, the LED is Red. LED is off when there is no hard drive.
Function
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1.2.1.2 LCD Front Panel
Smart Function Front Panel
The sma rt LCD panel is a n o p t i on t o co nfigur e the RA ID subsyst em. If you are configuring the subsystem using the LCD panel, press the Select button to login and configure the RAID subsystem.
Parts Function
Use the Up or Down arrow keys to go through the
Up and Down Arrow buttons
information on the LCD screen. This is also used to move between each menu when you configure the subsystem.
Select button This is used to enter the option you have selected.
Press this button to return to the previous menu.
Exit button EXIT
Environment Status LEDs
Parts Function Power LED Green LED indicates power is ON.
Global fault LED
NOTE: This button can also be used to reset the
alarm beeper and turn off the Global fault LED.
Red LED indicates a problem within the internal subsystem, such as fan fail/power supply fail/disk fault.
Power LED
Global fault LED
Activity LED
This LED will blink blue when the Di s k Array
Activity LED
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is busy or active.
1.2.2 Rear View
Redundant Power Supply
USB and eSATA to SATA II RAID Subsystem
Single Power Supply
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1. eSATA Port - The subsystem has two external SATA II port for connecting to the host s ystem or server.
Link LED: Green LED indicates eSATA is linking. Access LED: The LED will blink blue when the eSATA is being accessed.
2. USB Port - The subsystem has one USB 2.0 port for connecting to the host system or server.
3. R-Link / iSCSI Port: Remote Link through RJ-45 Ethernet for remote management -
The subsystem is equipped with one 10/100/1000 Ethernet RJ45 LAN port. You use a w eb br ow se r to manage the RAID subsystem through Ethernet for remote configuration and monitoring.
The R-Link Port is also used for accessing LUN via iSCSI (AoE) protocol.
4. Monitor Port - The subsystem is equipped with a serial moni tor port allowing you to connect a PC or terminal.
5. Power Supply Unit - The subsystem has dual or single power supply unit.
NOTE: In order to maintain the system I/O performance, it is not recommended to access the storage from the different host interfaces at the same time.
NOTE: After power on, the Power On LED is green, the PSU Power On/Fail LED is also green. When one Power Supply Module fails, the Power On/Fail LED is orange.
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1.3 Technical Specifications
Form-factor 2U 19-inch rackmount chassis RAID processor 400MHz storage I/O processor RAID level 0, 1, 10, 3, 5, 6 and JBOD Cache memory 256MB
No. of Channels (Host and Drive)
Host bus interface USB 2.0 / eSATA x 2 / R-Link (iSCSI) Drive bus interface SATA II (Up to 3.0Gbps)
Data transfer rate
Hot-swap drive tray Twelve (12) 1-inch trays Power supplies Cooling fan 2
4 +12
Support up to 480Mbps (USB 2.0) Support up to 3.0Gbps (SATA II) Support 10 / 100 / 1000 Mbps Ethernet
400W x1(upgradeable) or 400W x2 Redundant power supplies w/PFC
Password protection Yes Audible alarm Yes Failed drive indicators Yes Failed drive auto rebuild Yes Online consistency check Yes Online expansion Yes Array Roaming Yes
Online RAID level/ stripe size migration Instant availability and background initialization
Environment monitor Yes Auto spare support Yes Bad block auto-remapping Yes Remote management Yes MAID support Yes
Over 2TB support
Power requirements Relative Humidity: 10% ~ 85% Non-condensing
Yes
Yes
Windows OS which supports GPT (Windows XP/x64, 2003/SP1 or 64-bit, Vista,2008) Mac OS 10 or later, Linux Kernel 2.6 or later AC 100V ~ 240V full range 8A ~ 4A, 47Hz ~ 63Hz
Operating Temp: 10oC ~ 40oC (50oF ~ 104oF) Physical Dimensions: 88(H) x 482(W) x 500(D)mm
Note: Specifications are subject to change without notice. All company and
product names are trademarks of their respective owners.
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1.4 RAID Concepts
RAID Fundamentals
The basic idea of RAID (Redundant Array of Independent Disks) is to combine multiple inexpensive disk drives into an array of disk drives to obtain performance, capacity and reliability that exceeds that of a single large drive. The array of drives appears to the host computer as a single logical drive.
Five types of array architectures, RAID 1 through RAID 5, were originally defined; each provides disk fault-tolerance with different compromises in features and performance. In addition to these five redundant array architectures, it has become popular to refer to a non-redundant array of disk drives as a RAID 0 arrays.
Disk Striping
Fundamental to RAID technology is striping. This is a method of combining multiple drives into one logical storage unit. Striping partitions the storage space of each drive into stripes, which can be as small as one sector (512 bytes) or as large as several megabytes. These stripes are then interleaved in a rotating sequence, so that the combined space is composed alternately of stripes from each drive. The specific type of operating environment determines whether large or small stripes should be used.
Most operating systems today support concurrent disk I/O operations across multiple drives. However, in order to maximize throughput for the disk subsystem, the I/O load must be balanced across all the drives so that each drive can be kept busy as much as possible. In a multiple drive system without striping, the disk I/O load is never perfectly balanced. Some drives will contain data files that are frequently accessed and some drives will rarely be accessed.
By striping the drives in the array with stripes large enough so that each record falls entirely within one stripe, most records can be evenly distributed across all drives. This keeps all drives in the array busy during heavy load situations. This situation allows all drives to work concurrently on different I/O operations, and thus maximize the number of simultaneous I/O operations that can be performed by the array.
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Definition of RAID Levels
RAID 0 is typically defined as a group of striped disk drives without parity or data
redundancy. RAID 0 arrays can be configured with large stripes for multi-user environments or small stripes for single-user systems that access long sequential records. RAID 0 arrays deliver the best data storage efficiency and performance of any array type. The disadvantage is that if one drive in a RAID 0 array fails, the entire array fails.
RAID 1, also known as disk mirroring, is simply a pair of disk drives that store duplicate data but appear to the computer as a single drive. Although striping is not used within a single mirrored drive pair, multiple RAID 1 arrays can be striped together to create a single large array consisting of pairs of mirrored drives. All wr ites must go to both drives of a mirrored pair so that the information on the drives is kept identical. However, each individual drive can perform simultaneous, independent read operations. Mirroring thus doubles the read performance of a single non-mirrored drive and while the write performance is unchanged. RAID 1 delivers the best performance of any redundant array type. In addition, there is less performance degradation during drive failure than in RAID 5 arrays.
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RAID 3 sector-stripes data across groups of drives, but one drive in the group is dedicated to storing parity information. RAID 3 relies on the embedded ECC in each sector for error detection. In the case of drive failure, data recovery is accomplished by calculating the exclusive OR (XOR) of the information recorded on the remaining driv es. Records typically span all drives, which optimizes the disk transfer rate. Because each I/O request accesses every drive in the array, RAID 3 arrays can satisfy only one I/O request at a time. RAID 3 delivers the best performance for single-user, single-tasking environments with long records. Synchronized-spindle drives are required for RAID 3 arrays in order to avoid performance degradation with short records. RAID 5 arrays with small stripes can yield similar performance to RAID 3 arrays.
Under RAID 5 parity information is distributed across all the drives. Since there is no dedicated parity drive, all drives contain data and read operations can be overlapped on every drive in the array. Write operations will typically access one data drive and one parity drive. However, because different records store their parity on different drives, write operations can usually be overlapped.
Dual-level RAID achieves a balance between the increased data availability inh erent in RAID 1 and the increased read performance inherent in disk striping (RAID 0). These arrays are sometimes referred to as RAID 10.
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RAID 6 is similar to RAID 5 in that data protection is achieved by writing parity information to the physical drives in the array. With RAID 6, however, two sets of parity data are used. These two sets are different, and each set occupies a capacity equivalent to that of one of the constituent drives. The main advantage of RAID 6 is High data availability – any two drives can fail withou t loss of critical data.
In summary:
RAID 0 is the fastest and most efficient array type but offers no fault-tolerance. RAID
0 requires a minimum of one drive.
RAID 1 is the best choice for performance-critical, fault-tolerant environments. RAID 1
is the only choice for fault-tolerance if no more than two drives are used.
RAID 3 can be used to speed up data transfer and provide fault-tolerance in single-
user environments that access long sequential records. However, RAID 3 does not allow overlapping of multiple I/O operations and requires synchronized-spindle drives to avoid performance degradation with short records. RAID 5 with a small stripe size offers similar performance.
RAID 5 combines efficient, fault-tolerant data storage with good performance
characteristics. However, write performance and performance during drive failure is slower than with RAID 1. Rebuild operations also require more time than with RAID 1 because parity information is also reconstructed. At least three drives are required f or RAID 5 arrays.
RAID 6 is essentially an extension of RAID level 5 which allows for additional fault
tolerance by using a second independent distributed parity scheme (two-dimensional parity). Data is striped on a block level across a set of drives, just like in RAID 5, and a second set of parity is calculated and written across all the drives; RAID 6 provides for an extremely high data fault tolerance and can sustain multiple simultaneous drive failures. It is a perfect solution for mission critical applications.
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RAID Management
The subsystem can implement several different levels of RAID technology. RAID levels supported by the subsystem are shown below.
RAID Level Description Min. Drives
Block striping is provide, which yields higher
0
1
performance than with individual drives. There is no redundancy.
Drives are paired and mirrored. All data is 100% duplicated on an equivalent drive. Fully redundant.
1
2
3
5
10
6
Data is striped across several physical drives. Parity protection is used for data redundancy.
Data is striped across several physical drives. Parity protection is used for data redundancy.
Combination of RAID levels 1 and 0. This level provides redundancy through mirroring and striping.
Data is striped across several physical drives. Parity protection is used for data redundancy. Requires N+2 drives to implement because of two-dimensional parity scheme
3
3
4
4
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1.5 Array Definition
1.5.1 Raid Set
A Raid Set is a group of disk drives containing one or more logical volumes called Volume Sets. It is not possible to have multiple Raid Sets on the same disk drives.
A Volume Set must be created either on an existing Raid Set or on a group of available individual disk drives (disk drives that are not yet a part of a Raid Set). If there are existing Raid Sets with available raw capacity, new Volume Set can be created. New Volume Set can also be created on an existing Raid Set without free raw capacity by expanding the Raid Set using available disk drive(s) which is/are not yet Raid Set member. If disk drives of different capacity are grouped together in a Raid Set, then the capacity of the smallest disk will become the effective capacity of all the disks in the Raid Set.
1.5.2 Volume Set
A Volu me Set is seen by the host system as a single logical device. It is organized in a RAID level with one or more physical disks. RAID level refers to the level of data performance and protection of a Volume Set. A Volume Set capacity can consume all or a portion of the raw capacity available in a Raid Set. Multiple Volume Sets can exist on a group of disks in a Raid Set. Additional Volume Sets created in a specified Raid Set will reside on all the physical disks in the Raid Set. Thus each Volume Set on the Raid Set will have its data spread evenly across all the disks in the Raid Set. Volume Sets of different RAID levels may coexist on the same Raid Set.
In the illustration below, Volume 1 can be assigned a RAID 5 level while Volume 0 might be assigned a RAID 10 level.
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1.5.3 Easy to Use Fe atures
1.5.3.1 Instant Availability/Background Initialization
RAID 0 and RAID 1 Volume Set can be used immediately after the creation. But the RAID 3, 5 and 6 Volume Sets must be initialized to generate the parity. In the Background Mode initialization, the initializ ation proceeds as a background task, the Volume Set is fully accessible for system reads and writes. The operating system can instantly access to the newly created Volume Sets without waiting for the in itialization to be completed. One disadvantage of this is that the initialization process takes lon g er time. In Foreground Mode initialization, the initialization process is fast er but must be completed first before the Volume Set is ready for system access.
1.5.3.2 Array Roaming
The RAID subsystem stores configuration information both in NVRAM and on the disk drives. This protects the configuration settings in the case of a disk drive or controller failure. Array roaming allows the administrator the ability to move a complete Raid Set to another system without losing RAID configuration and data on that Raid Set. If a RAID enclosure fails to work, the Raid Set disk drives can be moved to another enclosure and inserted in any order.
1.5.3.3 Online Capacity Expansion
Online Capacity Expansion makes it possible to add one or more physical drives to a Raid Set, while the server is in operation, eliminating the need to back up and restore after reconfiguring the Raid Set. When disks are added to a Raid Set, unused capacity is added at the end of the Raid Set. Data on the existing Volume Sets residing on that Raid Set is redistributed evenly across all the disks. A contiguous block of unused capacity is made available on the Raid Set. The unused capacity can be used to create additional Volume Set. The expansion process is illustrated as follows.
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The RAID subsystem controller redistributes the original Volume Set over the original and newly added disks, using the same RAID level configuration. The unused capacity on the expand Raid Set can then be used to create an additional Volume Sets, with a different RAID level setting as needed by user.
1.3.3.4 Online RAID Level and Stri pe Size M igration
User can do migration on both the RAID level and Stripe Size of an existing Volume Set while the server is online and the Volume Set is in use. Online RAID level/stripe size migration can prove helpful during performance tuning activities as well as in the event that additional physical disks are added to the RAID subsystem. For example, in a system using two drives in RAID level 1, you could add capacity and retain fault tolerance by adding one drive. With the addition of third disk, you have the option of adding this disk to your existing RAID logical drive and migrating from RAID level 1 to 5. The result wou ld be parity fault tolerance and double the available capacity without taking the system off.
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1.5.4 High Availability
1.5.4.1 Creating Hot Spares
A hot spare drive is an unused online available drive, which is ready to replace a failed disk drive. In a RAID level 1, 10, 3, 5 or 6 Raid Set, any unused online av ailable drive installed but not belonging to a Raid Set can be defined as a hot spare drive. Hot spares permit you to replace failed drives without powering down the system. When the RAID subsystem detects a drive failure, the system will do automatic and transparent rebuild using the hot spare drives. The Raid Set will be reconfigured and rebuilt in the background while the RAID subsystem continues to handle system request. During the automatic rebuild process, system activity will continue as normal, however, the system performance and fault tolerance will be affected.
IMPORTANT: The hot spare must have at least the same or more capac it y a s t he drive it replaces.
1.5.4.2 Hot-Swap Disk Drive Support
The RAID subsystem has built-in protection circuit to support the replacement of SATA II hard disk drives without having to shut down or reboot the system. The removable hard drive tray can deliver “hot swappable” fault-tolerant RAID so lution a t a price mu ch less than the cost of conventional SCSI hard disk RAID subsystems. This feature is provided in the RAID subsystem for advance fault tolerant RAID protection and “online” drive replacement.
1.3.4.3 Hot-Swap Disk Rebuild
The Hot-Swap feature can be used to rebuild Raid Sets with data redund ancy such as RAID level 1, 10, 3, 5 and 6. If a hot spare is not available, the failed disk drive must be replaced with a new disk drive so that the data on the failed drive can be rebuilt. If a hot spare is available, the rebuild starts automatically when a drive fails. The RAID subsystem automatically and transparently rebuilds failed drives in the background with user-definable rebuild rates. The RAID subsystem will aut omatically cont inue the rebuild process if the subsystem is shut down or powered off abnormally during a reconstruction process.
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Chapter 2 Getting Started
2.1 Preparing the Subsystem and Powering On
Here are the basic steps to prepar e the RAID su bsystem f or us e.
1. Attach network cable to the R-Link port and connect the other end of network cable to your network hub/switch. Or as alternative for configuration, you may connect the serial cable to the Monitor port and to the serial port of your host/server.
2. Connect the USB cable / eSATA cable to the USB port / eSATA port of th e RAID subsystem and to the host system or server that will use the storage.
3. Connect the power cords to the AC input sockets. Plug the other ends of powe r cords to the power source.
4. Press the Power On/Off Switch at the rear of the subsystem.
2.2 Installing Hard Drives
This section describes the physical locations of the hard drives supported by the subsystem and gives instructions on installing a hard drive. The subsystem supports hot-swapping allowing you to install or replace a hard drive while the subsystem is running.
Each Drive Carrier has a locking mechanism. When the Lock Groove, which is located in carrier open button, is horizontal, the Drive Carrier is locked. When the Lock Groove is vertical, the Drive Carrier is unlocked. Lock and unlock the Driv e Carriers by using a flat-head screw driver.
a. Make sure the lock indicator is in unlocked position. T o pull out a disk tray, press
the carrier open button.
Carrier Open Button
b. Pull out an empty disk tray. Pull the lever handle outwards to remove the carrier
from the enclosure.
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c. Place the hard drive in the disk tray.
d. Install the mounting screws on the bottom part to secure the drive in the disk
tray.
e. Slide the tray into a slot.
f. Close the lever handle until you hear the latch click into place.
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