Thecus Technology N8800 user manual RAID Levels, RAID Configurations

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iSCSI Capacity

Indicates the capacity allocated to iSCSI.

RAID Config

Press this to configure RAID volumes.

Space Allocation

Press this to adjust the space allocated for data and iSCSI.

RAID Configuration

On the RAID List screen, press the RAID Config button to go to the RAID Configuration screen. In addition to RAID disk information and status, this screen lets you make RAID configuration settings.

For more information on RAID, see Appendix C: RAID Basics.

RAID Level

You can set the storage volume as JBOD, RAID 0, RAID 1, RAID 5, RAID 6 or RAID 10. RAID configuration is usually required only when you first set up the device. A brief description of each RAID setting follows:

RAID Levels

Level

Description

JBOD

The storage volume is a single HDD with no RAID support. JBOD

 

requires a minimum of 1 disk.

RAID 0

Provides data striping but no redundancy. Improves

 

performance but not data safety. RAID 0 requires a minimum of

 

2 disks.

RAID 1

Offers disk mirroring. Provides twice the read rate of single

 

disks, but same write rate. RAID 1 requires a minimum of 2

 

disks.

RAID 5

Data striping and stripe error correction information provided.

 

RAID 5 requires a minimum of 3 disks. RAID 5 can sustain one

 

failed disk.

RAID 6

Two independent parity computations must be used in order to

 

provide protection against double disk failure. Two different

 

algorithms are employed to achieve this purpose. RAID 6

 

requires a minimum of 4 disks. RAID 6 can sustain two failed

 

disks.

RAID 10

RAID 10 has high reliability and high performance. RAID 10 is

 

implemented as a striped array whose segments are RAID 1

 

arrays. It has the fault tolerance of RAID 1 and the performance

 

of RAID 0. RAID 10 requires 4 disks. RAID 10 can sustain two

 

failed disks.

WARNING

If the administrator improperly removes a hard disk that should not be

removed when RAID status is Degraded, all data will be lost.

RAID Configuration

Using RAID Settings, you can select stripe size, choose which disks are RAID disks or the Spare Disk. .

RAID Configurations

Item

Description

RAID

Check the boxes of the hard drives you wish to add to the

 

storage volume.

Master RAID

Check a box to designate this as the Master RAID volume. See

 

the NOTE below for more information.

Disk No.

Number assigned to the installed hard disks.

 

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Contents Thecus N8800 About This Manual Limited WarrantyCopyright and Trademark Notice Safety Warnings Table of Contents Storage Management System SettingsNetwork Management User and Group Management102 100101 103 Problems with Time and Date Settings 103Cant Map a Network Drive in Windows XP 103 105Product Highlights IntroductionOverview Package Contents Description Front PanelFront Panel Rear Panel Hard Disk TraysHard Disk Trays HDDBefore You Begin Hardware InstallationHard Disk Installation Cable Connections System Trouble Checking System StatusSystem Status Normal Thecus Setup Wizard First Time SetupPage Display Mode Display ModeLCD Operation LCD ControlsManagement Mode Typical Setup ProcedureManagement Mode USB CopyCreate Local Users or Setup Authentication Network SetupCreate Folders and Set Up ACLs Start ServicesPage System Management Web Administration InterfaceMenu Bar Menu BarLanguage Selection Product Information System/Service StatusStatus Menu Printer Status System InformationSystem Information Printer StatusUPS Settings UPS SettingsWake-up On Lan Configuration Enable or Disable WOL serviceEnable Schedule Power On/Off checkbox Power ManagementExample Monday On 800 Off Example Monday OnDisks Information Storage ManagementA.R.T. Information Disks InformationRAID Information RAID InformationA.R.T. Information RAID Configuration RAID ConfigurationRAID Configurations RAID LevelCreating a RAID Press Apply to build the RAID storage volumeMigrating a RAID Expanding a RAIDRAID 1 HDDx4 to RAID 5 HDDx4 Under the Volume Allocation List, click iSCSI Target Allocating Space for iSCSI VolumeVolume Allocation List Space AllocationCreate iSCSI Volume Create iSCSI Volume screen appearsRAID ID IQNSnapshot Stackable NASAdding Folders Folder ManagementFolder ACLDeleting Folders Editing FoldersAdd Folder Edit FolderNFS Share Snap Snapshot configurationNFS Share Snapshot Clicking on Snap then screen appears as followingPage Access Control List File System Check Advance Option Samba Recycle Bin File Access CacheSamba Anonymous Login Authentication ISCSI CRC/Checksum ISCSI Block SizeWAN Configuration WAN ConfigurationNetwork Management DhcpDhcp Configuration LAN ConfigurationLAN Configuration Dhcp ConfigurationWlan Configuration Wlan ConfigurationWlan Dhcp Configuration EssidAFP Apple Network Setup Web Services ConfigurationWeb Service Apple Network ConfigurationLocal User Configuration NFS SetupNFS Server Setting Enable or Disable NFS supportAdding Users Local User ConfigurationLocal Group Setting screen appears Enter a Group Name Local Groups ConfigurationModifying Users Deleting UsersDeleting Groups Batch User and Group CreationModifying Groups ADS/NT Support ADS/NT ConfigurationNotification Configuration System SettingsSystem Notifications AD Domain Example InformationSystem Logs Time and Date SettingsSystem Logs Time System Configuration Download/Upload System Configuration Backup and RestoreModule Management Module ManagementUpgrading System Firmware Reset to Factory Default SettingsFirmware Upgrade screen appears Reboot and Shutdown System Change Administrator PasswordChange Administrator Password LogoutFTP Server Additional Feature SetupSelections include Unlimited, 1, 2, 4, 8, 16 and 32 MB/s MB/sMedia Server ITunes ConfigurationITunes Server Media Manager Settings Connecting DMAs to the Media ServerAdding Media Share Folders Go to My MediaClick on File Add Printer Printer ServerWindows XP SP2 Windows Vista Select or install a printer and then press OK Page Completed / Total download size Download ManagerDownload Tasks Adding an Http Task Page Page Adding an FTP Task Page Page Page Adding a BT Task Page Page Scheduling Downloads Deleting TasksDownload Schedule ItemDescriptionUnder Download Schedule, set Scheduler to Enable Login Using the N8800Using WebDisk User and Group Management Local User ConfigurationWindows XP Publishing Wizard Photo ServerFolder Page Buttons Button DescriptionPage Page Page Page Page Managing Albums and Photos Password Protecting AlbumsCreating Albums PhotoSlide Shows Uploading Pictures to AlbumsExif Information Apple OS Mapping a Client PC to the N8800Windows Windows 2000/XP Mapping the N8800 as an iSCSI DrivePage Page Page Page Nsync File BackupAdding an Nsync Task NsyncSetting Up an Nsync Target on an Nsync Device Thecus Backup UtilitySetting Up an Nsync Target on Another Device Nsync Target Server SettingAdd New Task Apple OS X Backup Utilities Windows XP Data BackupTips and Tricks Remote AdministrationUSB and eSATA Storage Expansion Adding a Spare DiskPart I Setup a DynDNS Account Firewall Software ConfigurationPart II Enable Ddns on the Router Part III Setting up Virtual Servers HttpsHard Drive Damage Replacing Damaged Hard DrivesReplacing a Hard Drive RAID Auto-RebuildRestoring Factory Defaults TroubleshootingProblems with Time and Date Settings Forgot My Network IP AddressPage Hardware Specifications Appendix a Product SpecificationsSoftware Specifications Product Model N8800LCD Appendix B Customer Support Thank you for choosing ThecusBenefits Appendix C RAID BasicsRAID Levels Improved PerformanceJbod Stripe SizeDisk Usage ADS Benefits What is Active Directory?Appendix D Active Directory Basics Brand Series Model Appendix E UPS Compatibility List113 114 Copyrights Appendix F Licensing InformationSource Code Availability GNU General Public License Cgic License TermsPage Page Page 120
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