Promise Technology VessJBOD 1000 Series Product Manual Download Page 9

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Chapter 1: Introduction to VessJBOD

Temperature

Normal conditions:

5° to 40°C operational (-40° to 60°C non-operational)

Conditions of running SAS disk drives with one failed cooling fan:

5° to 35°C operational (-40° to 60°C non-operational)

Relative Humidity

95 percent maximum

Vibration

Random, 0.21 grms, 5-500 Hz, 30 Mins, X, Y, Z axis.

Dimensions (H x W x D)

1840+, 1840, 1740: 13 x 45 x 46 cm (5.1 x 17.7 x 18.1 in)

1830+, 1830, 1730: 8.8 x 45 x 46 cm (3.5 x 17.7 x 18.1 in)

Net Weight

1840+: 16.6 kg (36.1 lb) without drives, 24.6 kg (53.5 lb) with 16 drives*

1840: 15.8 kg (34.8 lb) without drives, 23.8 kg (52.5 lb) with 16 drives*

1830+: 13.4 kg (29.2 lb) without drives, 19.4 kg (42.3 lb) with 12 drives*

1830: 12.6 kg (27.8 lb) without drives, 18.6 kg (41.0 lb) with 12 drives*

1740: 13.8 kg (30.4 lb) without drives, 21.8 kg (48.1 lb) with 16 drives*

1730: 10.8 kg (23.5 lb) without drives, 16.8 kg (37.1 lb) with 12 drives*

* Assuming 0.5 kg (1.1 lb) per drive.

Carton Dimensions (H x W x D)

All models: 28.5 x 57.2 x 75.2 cm (11.2 x 22.5 x 29.6 in)

Carton Weight

1840+: 21.6 kg (47.6 lb)

1840: 20.8 kg (45.9 lb)

1830+: 18.8 kg (41.4 lb)

1830: 18.0 kg (38.8 lb)

1740: 19.2 kg (42.3 lb)

1730: 16.2 kg (35.7 lb)

Summary of Contents for VessJBOD 1000 Series

Page 1: ...VessJBOD 1730 1740 1830 1830 1840 1840 Product Manual Version 2 0 ...

Page 2: ...any other PROMISE Technology product Notice Although PROMISE Technology has attempted to ensure the accuracy of the content of this manual it is possible that this document may contain technical inaccuracies typographical or other errors PROMISE Technology assumes no liability for any error in this publication and for damages whether direct indirect incidental consequential or otherwise that may r...

Page 3: ...arranty and Support 6 CE Statement 6 FCC Statement 6 KCC Statement 6 Chapter 2 VessJBOD Installation 7 Unpacking the VessJBOD 7 Mounting VessJBOD in a Rack 8 Installing Disk Drives 11 Drive Slot Numbering 11 Installing Your Disk Drives 11 Making Data and Management Connections 13 JBOD Expansion to a VessRAID Subsystem 13 Drive Enclosures for a SuperTrak RAID Controller 15 Setting Up Serial Cable C...

Page 4: ...dating the Firmware 37 Downloading the Firmware Image File 37 Updating Firmware in WebPAM PROe 37 Updating Firmware with the JBOD Flash Utility 39 Replacing a Power Supply 41 VessJBOD 1730 and 1740 41 VessJBOD 1830 1830 1840 and 1840 41 Replacing an I O Module 42 Removing the old I O module 42 Installing the new I O module 43 Replacing a Cooling Fan 43 Original Models 43 Plus Models 45 Chapter 5 S...

Page 5: ...ts index chapter task lists and numerous cross references to help you find the specific information you are looking for Also included are four levels of notices Note A Note provides helpful information such as hints or alternative ways of doing a task Important An Important calls attention to an essential step or point required to complete a task Important items include things often missed Caution...

Page 6: ...esign Model Interface Number of Drives Drive Carriers Power Supplies Controller Fans 1840 SAS 16 plus 2 external 1840 SAS 16 original 2 internal 1830 SAS 12 plus 2 external 1830 SAS 12 original 2 internal 1740 SAS 16 original 1 internal 1730 SAS 12 original 1 internal Drive Carrier LEDs Drive Carriers Power and Status LEDs Drive Carrier LEDs Drive Carriers Power and Status LEDs ...

Page 7: ...30 rear view Features 3 5 x 1 SAS 3 Gb s drives 3 5 x 1 SATA 3 Gb s drives Any combination of SAS and SATA drives in the same system Hot swappable drive bays Staggered physical drive spin up I O Module Single Power Supply Internal Fans I O Module Internal Fans Dual Power Supplies External Fans Dual Power Supplies I O Module ...

Page 8: ...1840 450W Dual hot swappable and redundant 100 240 VAC auto ranging 50 60 Hz with PFC 1830 1830 350W Dual hot swappable and redundant 100 240 VAC auto ranging 50 60 Hz with PFC 1740 450W Single 100 240 VAC auto ranging 50 60 Hz with PFC and 80PLUS certification 1730 350W Single 100 240 VAC auto ranging 50 60 Hz with PFC and 80PLUS certification Current maximum 1840 and 1840 8 A 100 VAC or 4 A 240 ...

Page 9: ...t 1840 16 6 kg 36 1 lb without drives 24 6 kg 53 5 lb with 16 drives 1840 15 8 kg 34 8 lb without drives 23 8 kg 52 5 lb with 16 drives 1830 13 4 kg 29 2 lb without drives 19 4 kg 42 3 lb with 12 drives 1830 12 6 kg 27 8 lb without drives 18 6 kg 41 0 lb with 12 drives 1740 13 8 kg 30 4 lb without drives 21 8 kg 48 1 lb with 16 drives 1730 10 8 kg 23 5 lb without drives 16 8 kg 37 1 lb with 12 dri...

Page 10: ...PROMISE support site for drivers firmware and compatibility CE Statement Warning This is a class B product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures FCC Statement This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interf...

Page 11: ... Quick Start Guide printed RJ11 to DB9 serial data cable Screws for disk drives 70 pieces for 16 bay 50 pieces for 12 bay 1 5m 4 9 ft Power cords 1700 models 1 1800 models 2 CD with Product Manual and Quick Start Guide in PDF format Warning This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures ...

Page 12: ...unt and install the VessJBOD unit Be sure all switches are OFF before installing the VessJBOD unit or exchanging components Mount the rails to the rack using the appropriate screws and flange nuts fully tightened at each end of the rail Do not load the rails unless they are installed with screws as instructed The rails available for the PROMISE VessJBOD unit are designed to safely support that PRO...

Page 13: ...g screws and flange nuts from your rack system Be sure the front rail support is on the bottom facing inward The alignment pins fit into the rack holes above and below the attaching screws Use the attaching screws and flange nuts from your rack system Tighten the screws and flange nuts according to your rack system instructions 4 Place the VessJBOD unit onto the rails 5 Secure the VessJBOD unit to...

Page 14: ...m This completes rack mounting Go to Installing Disk Drives on page 11 Inside of post Rack front post Rail attaching screws not included Rail adjustment screw center outside of rail Flange Inside of post Rack back post Front rail Rear rail Support Locating pins 2 on each end ...

Page 15: ...Whether you have the original or plus carriers the slots are numbered the same Slot numbering is reflected in the WebPAM PROe and CLU user interfaces See Figures 8 and 9 Figure 3 16 bay VessJBOD drive slot numbering Figure 4 12 bay VessJBOD drive slot numbering Install all of the drive carriers into the VessJBOD enclosure to ensure proper airflow even if you do not populate all the carriers with d...

Page 16: ...er tighten 4 Reinstall the drive carrier into the VessJBOD enclosure Repeat steps 1 through 3 until all of your disk drives are installed Figure 5 Disk drive mounted in a drive carrier This completes disk drive installation Go to Making Data and Management Connections on page 13 Caution VessJBOD supports disk drive hot swapping To avoid hand contact with an electrical hazard do not remove more tha...

Page 17: ...rst VessJBOD to the SAS IN port on the I O module of the second VessJBOD 4 Connect the remaining VessJBOD units in the same manner All SAS ports have SFF 8088 connectors Configuring a Management Path VessRAID subsystems have one RAID controller The controller has an Ethernet RJ45 Management Port connector that enables you to monitor the VessJBOD subsystems over your network using the WebPAM PROe s...

Page 18: ... VessRAID This completes data and management connections Go to Setting Up Serial Cable Connections on page 17 Host PCs or Servers SAS HBA cards Network Switch VessRAID 1830s VessJBOD 1830 Expansion SAS port VessJBOD 1730 SAS OUT port SAS IN ports SAS IN port Management Port SAS IN port ...

Page 19: ...the I O module of the second VessJBOD 3 Connect the remaining VessJBOD units in the same manner All SAS ports have SFF 8088 connectors Configuring a Management Path The SuperTrak RAID Controller installs in the Host PC therefore it does not require a separate network management connection You can monitor the VessJBOD subsystems using the WebPAM PRO software installed on the Host PC Direct Manageme...

Page 20: ... This completes data and management connections Go to Setting Up Serial Cable Connections on page 17 VessJBOD 1830 VessJBOD 1730 VessJBOD 1830 Host PC or Server SuperTrak RAID Controller card SAS port on RAID controller SAS OUT port SAS IN port SAS OUT port SAS IN port SAS IN port ...

Page 21: ...ble The CLI is explained in Chapter 3 Management on page 21 Figure 8 The serial connector on the back of the VessJBOD To set up a serial cable connection 1 Attach the RJ11 end of the serial data cable to the RJ11 serial connector on the controller 2 Attach the DB9 end of the serial data cable to a serial port on the Host PC or Server This completes the serial cable connection Go to Connecting the ...

Page 22: ...lobal Enclosure Status LEDs display green continuously I O Module Activity LED flashes green when there is controller activity System Heartbeat LED blinks green once per second Figure 9 VessJBOD front panel LED display I O Module LEDs When boot up is finished and the VessJBOD subsystem is functioning normally Fan LEDs display green continuously SAS port LEDs flash green when there is activity Caut...

Page 23: ...f there is a disk drive in the carrier the Power Activity LED displays green If not the Power Activity LED remains dark The Power Activity LED flashes during drive activity The Disk Status LED displays green when a drive is configured This completes the power and start up Go to Setting up the Serial Connection on page 20 Fan 2 Fan 1 SAS OUT port SAS IN port Fan 1 Fan 2 Reserved Disk Status Power A...

Page 24: ...nagement of the VessJBOD unit See Chapter 3 Management on page 21 To set up a serial connection 1 Change your terminal emulation program settings to match the following specifications Bits per second 115200 Data bits 8 Parity None Stop bits 1 Flow control none 2 Start your PC s terminal VT100 or ANSI emulation program 3 Press Enter once to launch the CLI When connected and ready the CLI screen dis...

Page 25: ...nctions directly from the VessJBOD expansion unit through its Command Line Interface CLI LEDs Front Panel LEDs When boot up is finished and the VessJBOD expansion unit is functioning normally Power and Global Enclosure Status LEDs display green continuously I O Module Activity LED flashes green when there is controller activity System Heartbeat LED blinks green once per second Figure 1 VessJBOD fr...

Page 26: ...the table on the next page LEDs State Dark Steady Green Flashing Green Amber Red Power System Off Normal Global Enclosure Status System Off Normal Locating the Enclosure Fan power supply temperature or voltage problem I O Module Activity System Off or no SAS ports connected One or more SAS ports connected Activity Controller Heartbeat System Off Normal Check the I O Module LEDs on the back of the ...

Page 27: ...when a drive is configured If there is a disk drive in the carrier the Power Activity LED displays green If not the Power Activity LED remains dark The Power Activity LED flashes during drive activity The RAID subsystem controls the Disk Status LED behavior With a VessRAID the Disk Status LED displays green when a drive is configured See the table on the next page LEDs State Dark Green Amber Red B...

Page 28: ... Flashing Green Amber Red Power Activity No Drive Drive Present Activity Status No Drive or Unconfigured Drive OK Locating the Drive Drive Rebuilding Array Drive Offline The RAID subsystem controls Disk Status LED behavior The pattern described here is from a VessRAID ...

Page 29: ...ddresses of components through a downstream expansion connection See page 34 uptime Displays the number of days hours minutes and seconds since the firmware was loaded since the VessJBOD was started or restarted See page 35 vpdr Displays vital product data on field replaceable units See page 36 Use alone to see the list of commands Use with a command to see a list of options Example enclosure See ...

Page 30: ...ables you to make enclosure settings page 28 Rebooting the Controller You can reboot just the controller I O module This action might be needed to help with setting changes on the VessJBOD To reboot the only the controller 1 Verify that no data I O activity is in progress 2 At the cli prompt type enclosure a mod s reboot 1 and press Enter When the cli prompt reappears the controller has rebooted T...

Page 31: ...odule ID 1 Max I O Module Cnt 1 Firmware Version 02 00 0000 xx I O Module Role Primary Max HDD Slots 16 Max Connectors 2 Max PSU Cnt 2 Max Fan Cnt 2 Max Temp Sensor Cnt 8 Max Voltage Sensor Cnt 2 CU Status Fan1Speed Fan2Speed 1 Operational 4735 rpm 4037 rpm ID Location Temp Reading 1 I O Module 27C 80F Thermal Management Enabled Allows to shut down the system when critical temperature is reached Y...

Page 32: ... Management Monitors enclosure temperature adjusts fan speeds displays red LED on cooling unit when a fan fails Automatic Shutdown Shuts down the VessJBOD 30 seconds after the enclosure or controller reaches critical temperature Minimum Fan Speed Specifies the minimum fan speed when the VessJBOD reaches enclosure or controller warning temperature Making Enclosure Settings To set the enclosure warn...

Page 33: ...t the minimum fan speed to medium high At the cli prompt type enclosure a mod s minfanspeed 3 and press Enter For this command 1 means low 2 means medium low 3 means medium high 4 means high The actual speed depends on the fan manufacturer Factory Default Command The factory default command enables you to restore factory default settings in the VessJBOD enclosure To restore the enclosure to the de...

Page 34: ... the name of the function followed by h and press Enter See CLI Command Set on page 25 for a list of supported functions Link Command The Link command displays information about VessJBOD links including Link Status page 30 Link Statistics page 32 Clearing Statistics page 33 Expander SAS Addresses page 33 Attached SAS Addresses page 33 Figure 6 VessJBOD drive slot numbering Viewing Link Status To v...

Page 35: ... Rdy 14 DSK15 SAS 3 0G OK End Rdy 15 DSK16 SAS 3 0G OK End Rdy 16 CN 1 17 CN 1 18 CN 1 19 CN 1 20 CN 2 SAS 3 0G OK End Rdy 21 CN 2 SAS 3 0G OK End Rdy 22 CN 2 SAS 3 0G OK End Rdy 23 CN 2 SAS 3 0G OK End Rdy Phy PHY ID Port Port Id Type SAS or SATA Rate Rate 3G 6G Init Init Passed Dev Device Type Link Link Connected PRdy Phy Ready The following items are reported in the table above Phy Each link is...

Page 36: ...ready it displays Rdy Viewing Link Statistics To view link status 1 At the cli prompt type link and press Enter 2 Scroll down to Link Statistics The screen displays Link Statistics Phy Type InDW DsEr DwLo PhRe CoVi PhCh 0 DSK01 0x11 1 DSK01 0x61 2 DSK01 0x0D 3 DSK01 0x0D 4 DSK01 0x01 5 DSK01 0x61 6 DSK01 0x11 7 DSK01 0x0D 8 DSK01 0x0D 9 DSK01 0x01 10 DSK01 0x0D 11 DSK01 0x0D 12 DSK01 0x01 13 DSK01...

Page 37: ...ion Count PhCh PHY Change Count If the count is zero the counter shows dashes The fact that errors occur does not necessarily indicate a problem or that the VessJBOD unit is malfunctioning An individual error count that increments regularly indicates a possible problem and requires further investigation Clearing Statistics To clear the link error statistics At the cli prompt type link a clear c st...

Page 38: ...0 00 00 E0 11 4D E2 22 DSK15 50 00 00 E0 11 4E 49 C2 DSK16 50 00 00 E0 11 4D DC F2 CN 1 No Device Attached CN 2 50 00 15 5F FF C0 22 3F The following items are reported in the table above Port DSK01 through DSK16 represent drive slots Each slot has one PHY See page 30 Figure 6 CN 1 refers to the SAS IN port and CN 2 refers to the SAS OUT port on the I O module Each port has four PHYs See page 25 F...

Page 39: ...72 CN 2 1023 5000155FFFC02408 CN 2 The route command displays SAS addresses that are attached to the SAS ports of the VessJBOD unit Three items are reported Entry Arbitrary numbers listed in sequence SAS Address Of the disk drive or other component CnID External SAS port connector CN 1 refers to the SAS IN port and CN 2 refers to the SAS OUT port on the I O module Each port has four PHYs See page ...

Page 40: ...ter For this command 1 Controller I O module 6 Backplane For example vpdr i 1 returns Board ID 0 OEM Name PROMISE OEM Model Cx20s Jbod Mfg Part IOC C620s 01 Mfg SN B17D07138400004 Mfg Rev A1R1 0 Mfg Date 2009 02 15 WWN 20 00 01 01 55 FF FC 0D Command The VTrak CLI uses the standard Unix online help system To access help with a specific function do one of the following actions At the cli prompt typ...

Page 41: ...st PC The firmware image file includes all of the files to update the VessJBOD Updating Firmware in WebPAM PROe You can use this procedure if your VessJBOD expansion unit is managed by a VessRAID subsystem This procedure updates the firmware on the VessRAID and any attached VessJBOD expansion units through WebPAM PROe For more information on WebPAM PROe see Chapter 4 Management with WebPAM PROe an...

Page 42: ...the Firmware Update file The filename is similar to exp fw 2 03 0000 00 bin Click the file then click the Open button Click the Submit button 6 When the download is completed click the Next button A popup message appears warning you not to reboot the VessRAID during the firmware update procedure 7 In the popup message click the OK button The update progress displays Then a popup message appears to...

Page 43: ...erial connection Works with any RAID system configuration Preparing the Utility To prepare the utility 1 Verify that your serial connection from your PC to the VessJBOD is online See Setting up the Serial Connection on page 20 2 Unzip the firmware download locate and open the expfwdlutil folder The utility file is expfwdlutil_ version number exe By default the utility connects to the VessJBOD thro...

Page 44: ...pdating the Firmware To update the firmware 1 Double click the expfwdlutil_ version number exe file The Flash Utility dialog box appears 2 Click the Browse button and navigate to the Firmware Update file in the firmware folder The firmware file is exp fw version number bin 3 Click the file then click the Open button 4 Click the Start button The update begins You can monitor progress on the Progres...

Page 45: ...and 1840 are designed as field replaceable units You can replace a power supply without removing the VessJBOD from the rack The redundant power supplies on the VessRAID 1800 Series are designed as field replaceable units You can replace a power supply without removing the VessRAID from the rack Figure 2 Replacing a Power Supply A 1840 Series power supply is shown The 1830 Series is similar Removin...

Page 46: ...tion is stored on the disk drives I O modules rarely fail But you might have to remove and reinstall the same I O module in order to replace a cooling fan as described in this chapter Removing the old I O module To replace the I O module 1 Shut down the VessJBOD Turn OFF the power supply switch switches See page 39 Figure 1 2 Disconnect the SAS serial and power cables 3 On the I O module loosen th...

Page 47: ...h switches For more information about VessJBOD s start up behavior see Connecting the Power on page 18 This completes the I O module replacement procedure Replacing a Cooling Fan Original Models Original models include VessJBOD 1730 1740 1830 and 1840 To replace a fan 1 Verify that the Fan LED on the I O module is amber or red See Figure 4 Cautions Only a qualified technician should perform this p...

Page 48: ...le on a non static surface and remove the cover attaching screws one on each side then remove the cover See page 44 Figure 5 Figure 5 I O module cover and attaching screw 3U model shown 4 Remove the four attaching screws See Figure 6 5 Detach the fan s power connector and lift the old fan out of the I O module Fan 2 LED Fan 1 LED Attaching screw one each side Cover ...

Page 49: ...I O module See Replacing an I O Module on page 42 This completes the fan replacement procedure Plus Models Plus models include the VessJBOD 1830 and 1840 The VessJBOD Plus models have externally mounted fans that are replaceable without shutting down the expansion unit To replace a fan 1 Verify that the Fan LED on the I O module is amber or red See page 46 Figure 7 Cautions Only a qualified techni...

Page 50: ...ting screws 3 Draw the fan away from the I O module and unplug the fan s power wire 4 Connect the new fan s power wire 5 Place the new fan onto the I O module and install the two mounting screws This completes the fan replacement procedure Fan 1 mounting screws Fan 2 mounting screws Fan 2 LED Fan 1 LED ...

Page 51: ...port in the VessRAID Product Manual Early VTrak subsystems used a proprietary method of disk metadata VessRAID subsystems have a metadata to DDF conversion feature that converts disk drives in attached VessJBOD enclosures To use the conversion feature you must restart the VessRAID and VessJBOD after installing disk drives from an older VTrak subsystem Note that if you move your disk drives from th...

Page 52: ...urage you to use one of our electronic services which provide product information updates for the most efficient service and support If you decide to contact us please have the following information available Product model and serial number BIOS firmware and driver version numbers A description of the problem situation System configuration information including motherboard and CPU type hard drive ...

Page 53: ...e Netherlands E mail Support e Support On Line Fax Technical Support 49 0 2 31 56 76 48 29 Attn Technical Support Phone Technical Support 49 0 2 31 56 76 48 10 If you wish to write us for support PROMISE Technology Germany Europaplatz 9 44269 Dortmund Germany E mail Support e Support On Line Fax Support 39 0 6 367 124 00 Attn Technical Support Phone Support 39 0 6 367 126 26 If you wish to write u...

Page 54: ...Line Fax Support 86 10 8857 8015 Attn Technical Support Phone Support 86 10 8857 8085 or 8095 If you wish to write us for support PROMISE Technology China Beijing Room 1108 West Wing Shi Chuang Plaza Shangdi IT Park 22 Information Road Haidian District Beijing 100085 China E mail Support e Support On Line Fax Support 86 21 6249 4627 Attn Technical Support Phone Support 86 21 6249 4192 4193 or 4199...

Page 55: ...fication s performed by the end user b operation outside the environmental specifications for the product c accident misuse negligence misapplication abuse natural or personal disaster or maintenance by anyone other than a PROMISE or a PROMISE authorized service center Disclaimer of other warranties This warranty covers only parts and labor and excludes coverage on software items as expressly set ...

Page 56: ...rect incidental or punitive damages whether in contract tort or otherwise notwithstanding the failure of the essential purpose of the foregoing remedy and regardless of whether PROMISE has been advised of the possibility of such damages PROMISE is not an insurer If you desire insurance against such damage you must obtain insurance from another party Some states do not allow the exclusion or limita...

Page 57: ... Return ONLY the specific product covered by the warranty do not ship cables manuals diskettes etc with a copy of your proof of purchase to You must follow the packaging guidelines for returning products Use the original shipping carton and packaging Include a summary of the product s problem Write an attention line on the box with the RMA number Include a copy of proof of purchase Important Obtai...

Page 58: ...products PROMISE may replace defective parts with new or reconditioned parts or replace the entire unit with a new or reconditioned unit In the event of a replacement the replacement unit will be under warranty for the remainder of the original warranty term from purchase date or 30 days whichever is longer PROMISE will pay for standard return shipping charges only You will be required to pay for ...

Page 59: ...21 critical temp 29 reboot 26 warning temp 28 D disk drive LEDs 19 23 Disk drives install 11 disk drives from VTrak subsystem 47 hot swappable 47 LEDs 23 supported 47 download firmware image file 37 downstream devices 34 E enclosure automatic shutdown 29 command 26 critical temp 28 fan speed 29 global status LED 18 21 information 27 settings 28 thermal management 29 warning temp 28 error counts 33...

Page 60: ...0 M mapping routing table 34 P PHY 31 power connection 18 LED 18 21 power supply replace 41 R reboot controller 26 I O module 26 regulatory statements 6 replace blower 43 fan 43 fan original models 43 fan plus models 45 I O module 42 power supply 41 returning product for repair 53 RJ11 to DB9 cable 17 route command 34 routing table mapping 34 S SAS address 33 34 expander 33 screws counter sink 12 ...

Page 61: ... critical 28 warning 28 thermal management 29 troubleshoot SAS routing 35 U uptime command 35 V VessJBOD features 3 specifications 4 VessRAID models 2 warranty 6 51 VessRAID subsystem 37 vital product data 36 vpdr command 36 W warranty on VessRAID 51 WebPAM PROe 37 ...

Page 62: ...VessJBOD 1000 Series Product Manual 58 ...

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