Spring Switzerland GmbH Ver. 1.61 manual RAID types

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•Lower costs by centralizing storage management.

•iSCSI also simplifies the installation and on-going management of a SAN versus using Fibre Channel.

With Open-E iSCSI, you can add storage to your existing network quickly, easily, and most important cost-efficiently. Expensive hardware is no longer necessary. Take any computer, a new rack server or an old desktop PC and exchange the system drive for the Open-E iSCSI flash module. To store data Open-E iSCSI ENTERPRISE uses IDE (ATA), SATA or SCSI hard drives and hardware RAID controllers.

Within a few minutes, you will have up to several hundred gigabytes available on your network without much effort or any downtime.

2.4 RAID types

This manual is not intended to replace your RAID controller manual. But we want to provide you with an overview of common RAID types so that you can make an informed decision on which type to choose. Depending on whom you ask, RAID means either Redundant Array of Independent Disks or Redundant Array of Inexpensive Disks. Both are correct. In essence, you combine the capacity, speed and security of several disks into one.

RAID 0 forms one large hard disk by concatenating stripes from each member drive. Stripe size is configurable roughly between 64 KB and 1 MB. The result is a lightning- fast RAID, but with no added security. One failing drive may ruin the entire RAID.

RAID 1 mirrors hard drives. By writing identical data onto more than one drive, security is enhanced. A completely defective drive does not cause any loss of data. The drawback is reduced performance and capacity.

RAID 5 combines data striping from RAID 0 with parity checking, therefore combining speed and improved security. The loss of one drive is tolerable.

RAID 6 extends RAID 5 by adding an additional parity block, thus it uses block-level striping with two parity blocks distributed across all member disks. It was not one of the original RAID levels. The user capacity of a RAID 6 array is N-2, where N is the total number of drives in the array. RAID 6 does not have a performance penalty for read operations, but it does have a performance penalty on write operations due to the overhead associated with the additional parity calculations.

RAID 10 is a combination of RAID 1 and 0, hence the name. Data is written in a striped and mirrored configuration, providing high performance and robust security.

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Contents Manual Ver .61 May 02 Hardware installation ConfigurationBefore you get started Description of functionsTroubleshooting Guide Appendix a Appendix B Disclaimer CopyrightTrademarks System requirements Content of this packageBefore you get started Safety precautions Supported clientsSupported network protocols Required toolsFeatures What is iSCSI?Why Open-E iSCSI? Description of the functionsRAID types Getting ready Hardware installationInstalling Open-E iSCSI Page First-time operation of Open-E iSCSI ConfigurationBasic configuration of the iSCSI computer Logging into Open-E iSCSI Enterprise Page Create RAID Units Creating iSCSI targets volume Adding Disk UnitsPage Configuring end user workstation How to connect iSCSI in Windows 2000/XP/2003 Description of functions Functions of Open-E iSCSI via browser access F1, F2 and F5Shutting down and restarting ServerFunction Language Settings NetworkFunction IP address Function IpsecFunction Bonding Set bondingPrimary AdministratorMii Function Administrator Password Function Administrator AccessFunction E-mail notification Function USE Snmp How to retrieve information from SNMP?Function SSL Certificate Authority Function Remote access You can get information byHardware Function UPS configuration Function Clock settings Function Power button settings Function Set timeFunction Motherboard info Target Manager Function Unit ManagerFunction Units Assigned Function iSCSI Volume ManagerFunction Disks Localizer Function Number of snapshots Function Snapshot definition Function Chap User Target Access Function Create new targetFunction Target Volume Manager Function Target IP AccessFunction Target Remove Function Chap User Target Snapshot AccessFunction Target Rename Function Create new Chap user Function Target Snapshot AccessFunction Snapshot rename Function Edit Chap user Function Delete Chap userUsing snapshot with Open-E iSCSI Function System Restart Shutdown Function System ShutdownFunction Schedule for shutdown Miscellaneous Function Connection resetSnapshot Software Update Function Update downloader During update from CD please follow this steps2.5 S.M.A.R.T Function S.M.A.R.T. e-mail notification FailedHardware Page 3.3 S.M.A.R.T Function S.M.A.R.T. unit’s health statusFunction S.M.A.R.T. info 4.1 H/W Raid Function 3ware administrationsFunction S.M.A.R.T. test Function Qlogic administration Fibre Channel4.3 S/W Raid Function Create new S/W RAID unitAvailable Raids RAID 5 layout parity-algorithm RAID 6 layout parity-algorithmFunction S/W RAID E-mail notification Function „Manager RAIDFunction „Info Function „Software RAID unit removePage Troubleshooting Guide Open-E iSCSI does not boot, keyboard LEDs are flashingError values are not valid Error passwords do not matchAppendix a Open-E Software License agreementOwnership and Copyright Intellectual Property RightsAuthorized Service Disclaimer of WarrantiesLimitation of Liability WaiverAppendix B GNU General Public LicensePage Page Page Page Page No Warranty How to Apply These Terms to Your New Libraries
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