Sans Digital EliteRAID ER208UT+B Manuel d'utilisateur

ELITERAID ER208UT+BDETAILED USER’S MANUAL v1.0

INTRODUCTION101. IntroductionThe EliteRAID RAID Storage Subsystem is a high-performance SATA ll drive bus disk array controller. When properly congur

VT-100 UTILITY CONFIGURATION1004.5.6.2 Local IP AddressIf you intend to set up your client computers manually, make sure that the assigned IP address

VT-100 UTILITY CONFIGURATION1014.5.6.4 Telent Port NumberTo manually congure the "Telent Port Number" of the controller, move the cursor ba

VT-100 UTILITY CONFIGURATION1024.5.6.5 SMTP Port Number To manually congure the “SMTP Port Number” of the controller, move the cursor bar to the main

VT-100 UTILITY CONFIGURATION1034.5.7 View System EventsTo “View System Events”, move the cursor bar to the main menu and select the “View System Event

VT-100 UTILITY CONFIGURATION104Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick V

VT-100 UTILITY CONFIGURATION1054.5.10 System InformationChoose this option to display main processor, CPU Instruction cache and data cache size, rmwa

106WEB BROWSER-BASED CONFIGURATION5. Web Browser-based Conguration The RAID controller web browser-based conguration utility is rm-ware-based and u

WEB BROWSER-BASED CONFIGURATION107You must be logged in as administrator with local admin rights on the remote machine to remotely congure it. The RA

108WEB BROWSER-BASED CONFIGURATIONIndividual Category DescriptionQuick Function Create a default conguration, which is based on the number of physica

WEB BROWSER-BASED CONFIGURATION109Note: In “Quick Create” your volume set is automatically congured based on the number of disks in your system. Use

INTRODUCTION11oped for the use of shielded cables outside the PC. The eSATA cable is Fully-shielded cable with separation of the outer shielding (for

110WEB BROWSER-BASED CONFIGURATION5.4.2 Delete Raid SetTo delete a RAID set, click on the "Delete Raid Set" link. A "Select The RAID SE

WEB BROWSER-BASED CONFIGURATION1115.4.4 Ofine Raid SetThis function is for customer being able to unmount and remount a multi-disk volume. All Hdds o

112WEB BROWSER-BASED CONFIGURATION5.4.7 Delete Hot SpareSelect the target Hot Spare disk to delete by clicking on the ap-propriate check controller. T

WEB BROWSER-BASED CONFIGURATION1135.5 VolumeSet FunctionsA volume set is seen by the host system as a single logical device. It is organized in a RAID

114WEB BROWSER-BASED CONFIGURATION• Volume NameThe default volume name will always appear as Volume Set. #. You can rename the volume set name provid

WEB BROWSER-BASED CONFIGURATION115• Volume Strip SizeThis parameter sets the size of the stripe written to each disk in a RAID 0, 1, 10, 5 or 6 logica

116WEB BROWSER-BASED CONFIGURATIONeSATA0 host system with port multiplier function, the host port can support up to 8 volume sets (any Drive#: 0

WEB BROWSER-BASED CONFIGURATION1175.5.3 Modify Volume SetTo modify a volume set from a raid set:(1). Click on the “Modify Volume Set” link.(2). Tick o

118WEB BROWSER-BASED CONFIGURATION5.5.4 Check Volume SetTo check a volume set from a raid set: 1. Click on the “Check Volume Set” link.2. Tick on the

WEB BROWSER-BASED CONFIGURATION1195.6.2 Modify Pass ThroughUse this option to modify the Pass Through. User can modify the Volume Cache Mode, SATA Dat

INTRODUCTION12channel can support multiple volumes (up to 8) by Sans Digital’s target mode multiplier emulation.1.2.2 Unsurpassed Data AvailabilityThe

120WEB BROWSER-BASED CONFIGURATION5.6.4 Identify DriveTo prevent removing the wrong drive, the selected disk Fault LED will light for physically locat

WEB BROWSER-BASED CONFIGURATION121• System Beeper SettingThe “System Beeper Setting” function item is used to “Disabled” or “Enabled” the RAID control

122WEB BROWSER-BASED CONFIGURATION• Max SATA Mode SupportedWithin the RAID controller, the host eSATA / USB 2.0 chan-nels act as a target and 4 Serial

WEB BROWSER-BASED CONFIGURATION123To modify the value, you must set it from the command line using the Read Ahead option. The default normal option sa

124WEB BROWSER-BASED CONFIGURATION• HDD SMART Status Polling “HDD SMART Status Polling” was added to enable scanning of the HDD temperature function.

WEB BROWSER-BASED CONFIGURATION1255.7.2 EtherNet Cong Use this feature to set the controller Ethernet port conguration. Customer doesn’t need to cre

126WEB BROWSER-BASED CONFIGURATION5.7.3 Alert By Mail Cong To congure the raid controller mail function, move the cursor bar to the main menu and cl

WEB BROWSER-BASED CONFIGURATION127Password: Enter the valid password if your SMTP mail server need authentication. 5.7.4 SNMP Conguration To congure

128WEB BROWSER-BASED CONFIGURATION5.7.5 NTP Conguration (Ethernet Port Support)The “Network Time Protocol (NTP)” is used to synchronize the time of a

WEB BROWSER-BASED CONFIGURATION129• NTP Sever AddressThe most important factor in providing accurate, reliable time is the selection of NTP servers to

INTRODUCTION13• Multiple RAID selection• Up to 16 volumes per RAID controller (port multiplier SATA host: 8 volumes, without port multiplier SATA h

130WEB BROWSER-BASED CONFIGURATION5.7.7 Generate Test EventUse this feature to generate a event to test the email address which congures by the “Alte

WEB BROWSER-BASED CONFIGURATION1315.7.10 Upgrade FirmwarePlease refer to the appendix A Upgrading Flash Firmware pro-graming.5.7.11 Shutdown Controlle

132WEB BROWSER-BASED CONFIGURATION5.8 Information Menu 5.8.1 RaidSet HierarchyUse this feature to view the EliteRAID RAID controller current raid set,

WEB BROWSER-BASED CONFIGURATION1335.8.3 Hardware MonitorTo view the RAID controller hardware monitor information, move the mouse cursor to the “Inform

134APPENDIXAppendix AUpgrading Flash Firmware Programming UtilitySince the RAID controller features ash rmware, it is not neces-sary to change the h

APPENDIX135Upgrade Firmware Through ANSI/VT-100 Terminal EmulationGet the new version rmware for your RAID controller controller. For Example, downlo

136APPENDIX5. Click “Browse”. Look in the location where the Firmware upgrade software is located. Select the File name:6. Click “Send”, to send the

APPENDIX1379. The Firmware upgrade will take approximately thirty seconds to complete.10. After the Firmware upgrade is complete, a bar indicator will

138APPENDIX1. To upgrade the RAID controller rmware, move the mouse cur-sor to “Upgrade Firmware” link. The “Upgrade The Raid System Firmware” screen

APPENDIX139Appendix BSNMP Operation & DenitionOverviewThe Internal RAID controller rmware-embedded Simple Network Management Protocol (SNMP) age

CONFIGURATION METHOD142. Conguration MethodsAfter the hardware installation, the SATA disk drives connected to the RAID controller must be congured

140APPENDIXSNMP InstallationThe installation of the SNMP manager is accomplished in several phases:• Installing the Manager software on the client• Pl

APPENDIX141Appendix CTechnical SupportSans Digital Technical Support provides several options for users to access information and updates. We encourag

142APPENDIXAppendix DEvent Notication Congurations The controller classies disk array events into four levels depending on their severity. These in

APPENDIX143Event Level Meaning Action Start Initialize Warning Volume initialization has startedStart Rebuilding Warning Volume rebuilding has started

144APPENDIXC. RAID Set EventEvent Level Meaning Action Create RaidSet Warning New raidset createdDelete RaidSet Warning Raidset deletedExpand RaidSet

APPENDIX145Telnet Log Serious a Telnet login detectedInVT100 Log In Serious a VT100 login detectedAPI Log In Serious a API login detectedLost Rebuild

146APPENDIXAppendix ERAID ConceptRAID SetA RAID set is a group of disks connected to a RAID subsystem. A RAID set contains one or more volume sets. Th

APPENDIX147In the illustration, volume 1 can be assigned a RAID level 5 of operation while volume 0 might be assigned a RAID level 1E of operation. Al

148APPENDIXon the existing volume sets (residing on the newly expanded RAID set) is redistributed evenly across all the disks. A contigu-ous block of

APPENDIX149• Online RAID Level and Stripe Size MigrationFor those who wish to later upgrade to any RAID capabilities, a system with Sans Digital onlin

CONFIGURATION METHOD15A touch-control keypad and a liquid crystal display (LCD) mounted on the back panel of the RAID controller is the primary operat

150APPENDIXtion is completed, the volume set transitions to degraded mode. If a global hot spare is present, then it further transitions to rebuilding

APPENDIX151matically take its place and he data previously located on the failed drive is reconstructed on the Global Hot Spare. For this feature to w

152APPENDIXcondition, the Auto Declare Hot-Spare status will be disappeared if the RAID subsystem has since powered off/on.The Hot-Swap function can b

APPENDIX153The RAID subsystem allows user to choose the task priority (Ultra Low (5%), Low (20%), Medium (50%), High (80%)) to balance volume set acce

154APPENDIXit is found to have a defect, data will be automatically relocated, and the defective location is mapped out to prevent future write attemp

APPENDIX155Redundant Flash Image feature, the controller will revert back to the last known version of rmware and continue operating. This reduces th

156APPENDIXAppendix F Understanding RAID RAID is an acronym for Redundant Array of Independent Disks. It is an array of multiple independent hard disk

APPENDIX157RAID 1RAID 1 is also known as “disk mirroring”; data written on one disk drive is simultaneously written to another disk drive. Read perfor

158APPENDIXRAID 10(1E)RAID 10(1E) is a combination of RAID 0 and RAID 1, combing stripping with disk mirroring. RAID Level 10 combines the fast perfor

APPENDIX159RAID 5RAID 5 is sometimes called striping with parity at byte level. In RAID 5, the parity information is written to all of the drives in t

CONFIGURATION METHOD162.2 VT100 terminal (Using the controller’s serial port)The serial port on the RAID controller’s back panel can be used in VT100

160APPENDIXRAID 6RAID 6 provides the highest reliability. It is similar to RAID 5, but it performs two different parity computations or the same compu

APPENDIX161Summary of RAID LevelsRAID controller supports RAID Level 0, 1, 10(1E), 3, 5, and 6. The fol-lowing table provides a summary of RAID levels

162APPENDIX

CONFIGURATION METHOD17Key FunctionArrow Key Move cursorEnter Key Submit selection functionESC Key Return to previous screenL Key Line drawX Key Redraw

CONFIGURATION METHOD18Step 3. Select an appropriate connecting port in your Terminal. Click OK. Congure the port parameter settings. Bits per second:

CONFIGURATION METHOD19Step 6. Open the Settings Tab. Function, arrow and ctrl keys act as: Terminal Keys, Backspace key sends: “Crtl+H”, Emulation: VT

WARRANTY The information in this document is subject to change without notice. We make no warranty of any kind regarding this material, including, but

CONFIGURATION METHOD202.4 Conguration Menu TreeThe following is an expansion of the menus in conguration Util-ity that can be accessed through the L

CONFIGURATION METHOD21Note: Ethernet Conguration, Alert By Mail Cong, and SNMP Cong can only be set in the web-based conguration.

LCD CONFIGURATION MENU223. LCD Conguration MenuAfter the hardware installation, the disk drives connected to the RAID controller must be congured an

LCD CONFIGURATION MENU233.2 LCD Conguration Utility Main Menu OptionsSelect an option, related information or submenu items to display beneath it. Th

LCD CONFIGURATION MENU24Parameter SettingVolume Name Volume Set#00Host Channel/ Drive Select SATA/0Cache Mode Write BackSATA Xfer Mode SATA300+NCQStep

LCD CONFIGURATION MENU252 Recommend use drives have same capacity in a specic array. If you use drives with different capacities in an array, all dri

LCD CONFIGURATION MENU263.6 Using Raid Set and Volume Set Func-tions In “Raid Set Function”, you can use the create raid set function to generate the

LCD CONFIGURATION MENU277 Press ENT when you are nished creating the current raid set. To contin-ue dening another raid set, repeat step 3. To begin

LCD CONFIGURATION MENU28Figure 3.7-1 3.7.1 One-step creation Using LCD Hot KeyThis section explains how to use the LCD Hot-Key one-step creation RAID

LCD CONFIGURATION MENU29The LCD conguration manager starts the Hot-Key one-step creation RAID conguration by pressing DOWN button three times. If yo

Contents1. Introduction ... 101.1 System Architecture ...

LCD CONFIGURATION MENU301. All of the physical disk drives are contained in a raid set.2. The raid levels associated with hot spare, capacity, and s

LCD CONFIGURATION MENU31Figure 3.7.3-1 3.7.3.1 Create A New Raid Set For detailed procedure please refer to chapter section 3.6.3.7.3.2 Delete Raid Se

LCD CONFIGURATION MENU32Note: 1. Once the “Expand Raid Set” process has started, user can not stop it. The process must be completed.2. If a disk driv

LCD CONFIGURATION MENU333.7.3.5 Activate Incomplete RaidSetWhen one of the disk drive is removed in power off state, the raid set state will change to

LCD CONFIGURATION MENU343.7.4 Volume Set FunctionsA volume set is seen by the host system as a single logical de-vice. It is organized in a RAID level

LCD CONFIGURATION MENU353.7.4.1.1 Volume NameThe default volume name will always appear as Volume Set. #. You can rename the volume set name providing

LCD CONFIGURATION MENU363.7.4.1.4 Cache Mode User can set the cache mode as Write-Through Cache or Write-Back Cache.3.7.4.1.5 Host ChannelThere are tw

LCD CONFIGURATION MENU37Up to 16 volumes can support on each EliteRAID RAID controller. When both hosts map to the same volume, select both host allow

LCD CONFIGURATION MENU383.7.4.2 Delete Existed Volume SetChoose the "Delete Existed Volume Set" option. Using UP/DOWN buttons to select the

LCD CONFIGURATION MENU39Press ENT to select the existed volume set attribute. The vol-ume set attributes screen shows the volume set setting congu-ra

3.7.3.5 Activate Incomplete RaidSet ...333.7.3.6 Create Hot Spare Disk ...

LCD CONFIGURATION MENU40set number that user wants to show and press ENT. The volume set information will show Volume Set Name, Raid Set Name, Volume

LCD CONFIGURATION MENU41Figure 3.7.5-2 3.7.5.1 Display Drive Information Using UP/DOWN buttons to choose the “Display Drive Informa-tion” option and p

LCD CONFIGURATION MENU42All values can be changed by user. Press the UP/DOWN buttons to attribute and then press ENT to modify the default value. Us-i

LCD CONFIGURATION MENU43To identify selected drive from the physical drive pool, press UP/DOWN buttons to choose the “Identify The Selected Drive” opt

LCD CONFIGURATION MENU44Figure 3.7.6-1

LCD CONFIGURATION MENU453.7.6.1 Mute The Alert Beeper The “Mute The Alert Beeper” function item is used to control the RAID controller beeper. Select

LCD CONFIGURATION MENU463.7.6.5 Raid Rebuild PriorityThe “Raid Rebuild Priority” is a relative indication of how much time the controller devotes to a

LCD CONFIGURATION MENU47Disable: No NCQ supportESB2/MACPro/Siliconlimage: Intel ESB2, MACPro and Siliconimage SATA controllerICH: Intel ICH series

LCD CONFIGURATION MENU48designed to meet short-term startup power demand as well as steady state conditions. Sans Digital has supported the xed value

LCD CONFIGURATION MENU49capacity of a drive that is used in redundant units. The RAID controller provides three truncation modes in the system congur

3.7.6.15 Terminal Port Conguration ...493.7.6.16 Shutdown The Controller...503.

LCD CONFIGURATION MENU503.7.7 Ethernet CongurationTo conguration Ethernet function, press ENT to enter the main menu. Press UP/DOWN buttons to selec

LCD CONFIGURATION MENU51Conguration" function and press ENT. Using UP/DOWN buttons to select DHCP, then press ENT. Select the “Disabled” or “En

LCD CONFIGURATION MENU523.7.7.5 SMTP Port NumberTo manually congure the “SMTP Port Number” of the control-ler, move the cursor bar to the main menu “

LCD CONFIGURATION MENU533.7.11 System InformationChoose this option to display Main processor, CPU Instruction cache and data cache size, rmware vers

VT-100 UTILITY CONFIGURATION544. VT-100 Utility Conguration The RAID controller conguration utility is rmware-based and uses to congure raid sets

VT-100 UTILITY CONFIGURATION55Step Action1 Designate hot spares/pass-through (optional).2 Choose a conguration method.3 Create raid sets using the av

VT-100 UTILITY CONFIGURATION56Step Action1 Choose “Quick Volume/Raid Setup” from the main menu. The available RAID levels with hot spare for the curre

VT-100 UTILITY CONFIGURATION578 If you need to add additional volume set, using main menu “Create Volume Set” function4.4 Using Raid Set/Volume Set Fu

VT-100 UTILITY CONFIGURATION584 Press UP/DOWN buttons to select specic physical drives. Press the En-ter key to associate the selected physical drive

VT-100 UTILITY CONFIGURATION58Note: The manufacture default password is set to 0000, this password can be by selected the “Change Password” in the sec

4.5.3.2 Delete Volume Set ...784.5.3.3 Modify Volume Set ...

VT-100 UTILITY CONFIGURATION60This password option allows user to set or clear the raid controller’s password protection feature. Once the password ha

VT-100 UTILITY CONFIGURATION61Arrow Key: Move cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain MenuQuick Vol

VT-100 UTILITY CONFIGURATION62A single volume set is created and consumed all or a portion of the disk capacity available in this raid set. Dene the

VT-100 UTILITY CONFIGURATION63Arrow Key: Move cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain MenuQuick Vol

VT-100 UTILITY CONFIGURATION644.5.2.1 Create Raid Set To dene raid set, follow the procedure below:1. Select “Raid Set Function” from the main menu.2

VT-100 UTILITY CONFIGURATION654.5.2.2 Delete Raid SetTo change a raid set, you should rst delete it and re-create the raid set. To delete a raid set,

VT-100 UTILITY CONFIGURATION664.5.2.3 Expand Raid SetInstead of deleting a raid set and recreating it with additional disk drives, the “Expand Raid Se

VT-100 UTILITY CONFIGURATION67Migrating occurs when a disk is added to a raid Set. Migration status is displayed in the raid status area of the “Raid

VT-100 UTILITY CONFIGURATION68the disk drive is removed in power off state, the RAID set state will change to “Incomplete State”. If user wants to con

VT-100 UTILITY CONFIGURATION694.5.2.8 Rescue Raid SetWhen the system is power off in the RAID set update period, it may be disappeared in this abnorma

4.5.10 System Information ... 1055. Web Browser-based Conguration ... 1065.1 Fir

VT-100 UTILITY CONFIGURATION704.5.3 Volume Set FunctionArrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID Con

VT-100 UTILITY CONFIGURATION71The following steps is the volume set features:1. Volume sets of different RAID levels may coexist on the same raid set.

VT-100 UTILITY CONFIGURATION723. The “Create Volume From Raid Set” dialog controller ap-pears. This screen displays the existing arranged raid sets. S

VT-100 UTILITY CONFIGURATION734.5.3.1.2 Raid LevelSet the RAID level for the Volume Set. Highlight Raid Level and press Enter. The available RAID leve

VT-100 UTILITY CONFIGURATION74Arrow Key: Move cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain MenuQuick Vol

VT-100 UTILITY CONFIGURATION754.5.3.1.4 Strip SizeThis parameter sets the size of the stripe written to each disk in a RAID 0, 1, 10, 5 or 6 logical d

VT-100 UTILITY CONFIGURATION764.5.3.1.6 Drive NumbereSATA0 host system with port multiplier function, the host port can support up to 8 volume sets (a

VT-100 UTILITY CONFIGURATION77USB2.0 host system, the host port can support up to 16 volume sets (Drive# number from 0 to 15). Assign the drive# value

VT-100 UTILITY CONFIGURATION784.5.3.2 Delete Volume SetTo delete volume set from raid set system function, move the cursor bar to the “Volume Set Func

VT-100 UTILITY CONFIGURATION794.5.3.3 Modify Volume SetUse this option to modify volume set conguration. To modify volume set values from “Volume Set

5.7.8 Clear Events Buffer ... 1305.7.9 Modify Password ...

VT-100 UTILITY CONFIGURATION80Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION814.5.3.4 Check Volume SetUse this option to verify the correctness of the redundant data in a volume set. For example, in

VT-100 UTILITY CONFIGURATION824.5.4 Physical DrivesChoose this option from the Main Menu to select a physical disk and to perform the operations liste

VT-100 UTILITY CONFIGURATION834.5.4.1 View Drive Information When you choose this option, the physical disks in the EliteRAIDRAID controller are liste

VT-100 UTILITY CONFIGURATION844.5.4.3 Modify Pass-Through DiskUse this option to modify the “Pass-Through Disk Attribute”. To modify Pass-Through Disk

VT-100 UTILITY CONFIGURATION85Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION86Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION874.5.5.3 Change PasswordThe "Change Password" option allows user to set or clear the password protection featur

VT-100 UTILITY CONFIGURATION88Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION89Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

• Auto Reassign Sector ... 153• Consistency Check ...

VT-100 UTILITY CONFIGURATION90Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION914.5.5.9 Volume Data Read AheadThe Read data ahead parameter species the controller rmware algorithms which process the

VT-100 UTILITY CONFIGURATION92Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION93Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION94Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION95Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION96Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION97Note: 1. User can only update the rmware through the VT100 Terminal or web browser-based RAID Management through the co

VT-100 UTILITY CONFIGURATION98Arrow Key: Move Cursor, Enter: Select, ESC: Escape, L:Line Draw, X: RedrawSans Digital RAID ControllerMain Menu Quick Vo

VT-100 UTILITY CONFIGURATION994.5.6.1 DHCP FunctionDHCP (Dynamic Host Conguration Protocol) is a protocol that lets network administrators manage cen