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32

 

 U41578-J-Z875-1-76

Configuring the RAID system

Setting the controller parameters

Click the Controller Settings button. The following display will appear. Do not 
change any of the checkboxes if not necessary. If you are using firmware 
version 8.20, ensure that the checkbox for Enable Background Initialisation is
 not selected.

Basic

To obtain the best performance, set the Rebuild Rate to 20-30%. If you want to 
return to your RAID level as quickly as possible after a failure, set the Rebuild 
Rate to 50%. 

With the exception of Expert Settings, the remaining file cards in this window 
can be left with their default settings and should not be changed.  For details on 
Expert Settings, see the comments for this file card below.

Содержание FibreCAT S80

Страница 1: ...Edition Februar 2004 FibreCAT S80 Installing Configuring and Maintenance Spheras Manager Version 1 3 ...

Страница 2: ... EN ISO 9001 2000 To ensure a consistently high quality standard and user friendliness this documentation was created to meet the regulations of a quality management system which complies with the requirements of the standard DIN EN ISO 9001 2000 cognitas Gesellschaft für Technik Dokumentation mbH www cognitas de Copyright and Trademarks Copyright Fujitsu Siemens Computers GmbH 2004 All rights res...

Страница 3: ... 13 System requirements 13 Installation 13 Installation under Sun Solaris 8 9 and Linux 15 System requirements 15 MS Windows client 15 Solaris Server 15 Linux Server 16 Updating an existing installation 16 Checking for a previous installation 16 Uninstalling previous software 17 Making a new installation 21 Starting the Spheras GUI under MS Windows Client 25 Configuring the RAID system 29 Hardware...

Страница 4: ...pdate 61 Expand Capacity 64 Methods 64 Starting Expand Capacity 67 Expand Capacity of a LUN or a group 69 Cabinet ID 71 Battery backup unit 74 Event Notification 76 FibreCAT S80 Quick Installation Guide 77 Installation for PRIMEPOWER 77 Installation procedure 77 Installation for PRIMERGY 79 Installation procedure 79 HBA installation 79 Installing Emulex QLogic configuration tools 79 Installing GAM...

Страница 5: ...nual is addressed to systems administrators skilled customer personnel and operating and maintenance personnel using SPHERAS software running on FibreCAT S80 systems In order to fully understand the installation and configuration instructions in this manual you should be familiar with the related hardware operating systems data transmission RAID systems and the English language Attention Do not mi...

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Страница 7: ...cable layouts the failure of a shelf can cause the disconnection of shelves lower down in the cascade with the result that these are no longer available We recommend that you choose a cascaded cable layout which ensures that a shelf is available at all times even in the event of a failure of a shelf higher up in the cascade The three cabling examples below show how you can do this ...

Страница 8: ...4 U41578 J Z875 1 76 Preparing for installation Cabling example with two shelves to Host Bus Adapter I O Modul CO CO I O Modul CO CO RAID Controller RAID Controller to Host Bus Adapter ...

Страница 9: ...U41578 J Z875 1 76 5 Preparing for installation Cabling example with three shelves to HBA to HBA I O Modul CU CU I O Modul CU CU RAID Controller RAID Controller I O Modul CU CU I O Modul CU CU ...

Страница 10: ...Z875 1 76 Preparing for installation Cabling example with four shelves to HBA to HBA I O Modul CU CU I O Modul CU CU RAID Controller RAID Controller I O Modul CU CU I O Modul CU CU I O Modul CU CU I O Modul CU CU ...

Страница 11: ...evel and work upwards Use a pointed pin to set the shelf ID switches Set the controller shelf ID to 0 Set the first expansion shelf ID to 1 the second expansion shelf ID to 2 and so on Set all the shelves without leaving any gaps in ID numbering Do not leave any empty spaces Connect up the two power supply units with the power supply cables Use the redundancy shown in the diagram above Switch on b...

Страница 12: ...witch on again the configurations stored in the controller will not match the previous configurations After five minutes and when the start up has been successfully completed the LEDs on the system components will light up as shown below Module LED status after successful start up Controller Channel if installed C1 Controller Channel C0 Port C1 P1 C1 P0 Port C0 P1 C0 P0 The following Front LEDs ar...

Страница 13: ...s of your FibreCAT S80 have LEDs indicating operating status The meaning of the LED displays is given below Power supply unit and fan HDD Inside fan 1 fault amber Inside fan 2 fault amber Power fault amber Power ok green HDD ready green HDD status green or amber Disk drive LED description ...

Страница 14: ...10 U41578 J Z875 1 76 Preparing for installation LS module IO module Signal detected upper port green Signal detected lower port green ...

Страница 15: ...er normally off Ready green normally on Dirty Cache green BBU fault amber normally off Failed as Partner green normally off Device Activity green normally flash Host Activity green normally flash If LED is on There is Data in the cache which is actually not written to disk No Failure ...

Страница 16: ...heras Manager software does not have to be installed on your system administrator workstation because you can use it over a local network You do not necessarily require a system with a client server architecture you just need to be able to download the Graphic User Interface GUI architecture with a Java plug in This means that your system must have the necessary Java Runtime Environment JRE The JR...

Страница 17: ...iveX options by selecting the corresponding check boxes Java Plugin version 1 4 1 2 in this case select Control Panel Java Plugin Cache and deactivate Cache The server can be connected to a LAN with an existing domain network The server need not necessarily be a member of the domain It is not necessary to have the Server connected to a LAN All the Spheras agents must be stopped Any previous instal...

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Страница 19: ...000 MS Internet Explorer version 5 5 or higher or Netscape version 4 79 or higher Java Plugin version 1 4 1 02 in this case select Control panel Java Plugin Cache and deactivate Cache There is no need that the server is connected to a LAN Solaris Server The server must be linked over a fibre channel to the FibreCAT S80 unit s The Spheras software must already be installed SPARC based 300 MHz CPU 2...

Страница 20: ...tallation or making a new installation These are 1 You must stop or delete any previous Spheras agents present 2 There should be no remnants of any previous installations on your computer 3 You should check that there is at least 150 MB of free disk space in usr local Linux Server The server must be linked over a fibre channel to the FibreCAT S80 unit s Pentium III 400MHz 128MB RAM 150 MB free dis...

Страница 21: ... the current SSM agents The following dialogue is displayed Wait a few minutes until all the agents has been really stopped Check that the stop command has been completed using the statement cd usr local elSSM bin ssmAgent stop pwd usr local elSSM bin ssmAgent stop ssmAgent Warning This host has no domain name Stopping Spheras Storage Manager OK ssmAgent status ...

Страница 22: ... 9 and Linux The following display appears Now uninstall your existing SSM installation using the Solaris instruction Linux rpm e elSSM ssmAgent status ssmAgent Warning This host has no domain name Showing Spheras Storage Manager processes pkgrm elSSM ...

Страница 23: ...ing this package Do you want to continue with the removal of this package y n q y Verifying package dependencies Processing package information Executing preremove script Removing htdocs synbolic link from bin Removing core Removing ssm chkpt Removing pathnames in class elSSM usr local elSSM release html usr local elSSM htdocs non empty directory not removed usr local elSSM etc usr local elSSM bin...

Страница 24: ...n ssmAnalyze usr local elSSM bin ssmAnal usr local elSSM bin ssmAgent usr local elSSM bin ssm conf usr local elSSM bin Proxy jar usr local elSSM bin non empty directory not removed usr local elSSM README txt usr local elSSM LICENSE txt etc rc2 d S99ssm Executing postremove script Updating system information Removal of elSSM was successful ...

Страница 25: ... Solaris Automount function for your system The file to be installed will have a name like this Linux elFSC 1 3 3 i386 rpm Install the software using the Solaris Package Add function and the command Follow the installation instructions until installation is successfully completed The directory path is already given as usr local elSSM You can if you wish change this path Linux rpm i Spheras Softwar...

Страница 26: ...th yes the package will be installed On completion the message Installation of elSSM was successful will be displayed For further information on configuration and settings see the README txt file in the directory usr local elSSM 1 3Build3 pkg 1 3Build3 pkg 1 3Build3 pkg 1 3Build3 pkg ...

Страница 27: ...sing a browser you must either restart the host or manually restart the ssmAgent with this instruction usr local elSSM bin ssmAgent start You can display the current status of the agents by using the instruction ssmAgent status The ssmData Agent is no longer available from software 1 2 Build 21 onwards ...

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Страница 29: ...can download a JRE You can of course download the Java Runtime Environment from a CD or from your internal server data base Use Java Plugin version 1 4 1 02 in this case select Control panel Java Plugin Cache and then deactivate Cache If you want to download the JRE from the Web click the icon shown in the middle of the display The download address is under the icon and the plugin will now be down...

Страница 30: ...y will now appear Enter your user name and password Where necessary select a domain The SPHERAS Manager software welcome page will be displayed IMPORTANT The name of the top item on the menu tree in the left hand side window Stora 100 in the example above must be the same as the URL host ...

Страница 31: ...ox in front of the top item is missing the host does not see the FibreCAT S80 Check your HBA and or cabling Start Spheras Agents Check under Services if the Spheras Agent SB2500 is still running If not restart HBA using HBA anywhere restart Agent Click the host name Stora 100 in our example This displays a menu tree showing the components of the FibreCAT S80 connected up to the system Configuratio...

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Страница 33: ... system Hardware components The expanded menu tree shows the Enclosures directory icon and underneath this the buttons for the individual components of the FibreCAT S80 Select these buttons to call up a status report for the component selected ...

Страница 34: ...then click the Physical Assets file card This displays the model number firmware version World Wide Node Name WWNN cache size and the number of physical and logical drives of the controller In the example below the number of logical drives is set to 0 This indicates that the parameter still has to be configured ...

Страница 35: ...ntroller information as before but this time it is more detailed The Dual Controller Status box on the right hand side indicates that this RAID controller configuration has two controllers and that the Partner Status is set to ACTIVE The Controller Settings button above Partner Status is used to set the basic controller settings For further details see the following sections ...

Страница 36: ...t the checkbox for Enable Background Initialisation is not selected Basic To obtain the best performance set the Rebuild Rate to 20 30 If you want to return to your RAID level as quickly as possible after a failure set the Rebuild Rate to 50 With the exception of Expert Settings the remaining file cards in this window can be left with their default settings and should not be changed For details on...

Страница 37: ...U41578 J Z875 1 76 33 Configuring the RAID system Advanced Settings ...

Страница 38: ...xpert Settings If your system has only one controller you must select the Enable Force Simplex checkbox if your system has two controllers deselect this checkbox If you use a Remote Power Switch box RPS please select Debug Port Usage at 9600 Baud speed ...

Страница 39: ...g a 2 GBit s Host Bus Adapter HBA fix the Channel Speed Settings at 2 GBit s Caution Do not under any circumstances use the Auto Neg option on the HBA At this point only set the necessary Controller Speed Settings Do not set the Disk Channels option The Disk Channel setting affects the internal magnetic disk interfaces only and is fixed at 2 GB leave it at this setting Do not under any circumstanc...

Страница 40: ...on you must delete the old configuration WARNING This operation cannot be undone Selecting the Clear Configuration button will permanently delete all current configuration data and any linked user data You can use this function to deliberately delete old configurations and also to normalise the system when restarting after a fault i e when various red LEDs are lit A prompt will be displayed warnin...

Страница 41: ...e Configuration and RAID Wizard file cards The following display will appear You only need to configure one controller even on systems with two controllers In dual systems the data are automatically transferred to the second controller Before you start the RAID system configuration proper you should first check that you have deleted the old configuration The display shown above with the Start Conf...

Страница 42: ...ows an overview of all the hard disk drives available Click the Add Disk Group button When you have added all the disk drives groups you require select one of the groups To select a group move the cursor onto the group you require in the Disk Group column and then double click The entire line will be highlighted in blue ...

Страница 43: ...ives but this means that at the moment when the information is requested the disk drive is not available for normal data accessing Given that enclosure information is being called up all the time it makes good sense to use the spare drives for this task Using the spare disks for enclosure information means that you get full performance from the normal hard disk drives and at the same time make use...

Страница 44: ... management Assigning disks in a given logical order also makes sense performance wise When you select a drive in the Available Drives window and then click the Add button the drive entry will disappear from the Available Drives window and appear in the Member of Disk Group window This example shows a fully configured disk group The total capacity of all the drives in the current disk group disk a...

Страница 45: ...ps The maximum permitted number of configured drives per disk group is 16 A single FibreCAT S80 system can have up to a maximum of 32 logic drives LUN Any division into disk groups can be used When you have completed the configuration tasks in this window click the Next button to move on to the next display ...

Страница 46: ...ou defined previously are now displayed together with their total capacity in the Disk Groups window at the top of the display shown here The next step is to define the logical drives Click the Add Logical Drive button to add a logical drive to the list ...

Страница 47: ...ith mainly sequential access we advise using RAID level 3 With higher I O loads assign RAID level 5 In the Logical Capacity column enter the required value for user capacity The Physical Capacity required will be entered automatically in accordance with the RAID level set previously At RAID level 0 the difference between physical and logical capacity is zero At RAID levels 0 1 and 1 the factor is ...

Страница 48: ...re IMPORTANT The system cannot be accessed during foreground initialisation On full configuration systems 56 HDDs 4 1 TB foreground initialisation can last as much as four days You must always create a Mini LUN 0 of 10 MByte for Cluster and or Server View reasons This LUN 0 shall be visible for all nodes in a cluster The Mini LUN shall not be grouped in any failover Group i e DDM Use the Logical D...

Страница 49: ...nfiguration at a later date very complicated Now think about the RAID levels RAID levels 0 and 1 are suitable for groups with up to two hard disk drives RAID levels 0 0 1 3 and 5 are suitable for systems with more than two hard disk drives per disk group Caution Do not configure RAID 0 and RAID 3 or 5 within the same group Data loss possible Do not configure more than 2 TB 1 MB within one group Ex...

Страница 50: ...f you click at Enclosure Rear View you find the following picture It will make things easier to understand In the SAN LUN mapping form another numbering method is used for the channels Start with C1 instead of C0 this means that the second channel is numbered as C2 rather than C1 All the HBAs Host Bus Adapters these are the fibre channel controllers in the host system previously or currently linke...

Страница 51: ... between the WWNN and the WWPN World Wide Port Name will be clear from the symbol figure below FibreCAT S80 port names IMPORTANT You must record all the SAN LUN map settings See Chapter Recording the Configuration Port 3 Port 4 Port 2 Port 1 WWNN 20 00 00 03 38 00 8F BC WWPN 22 00 00 03 38 00 8F BC WWPN 23 00 00 03 38 00 8F BC WWPN 24 00 00 03 38 00 8F BC WWPN 21 00 00 03 38 00 8F BC ...

Страница 52: ... HBAs at the same time The selected HBA is marked green the connected but not selected HBA s are marked yellow Earlier connected HBA s which are not actually connected are marked red There are up to 256 different HBA s possible Click Next to confirm your settings A complete list of all your configuration settings will now be displayed on screen Check that these are correct If they are correct clic...

Страница 53: ...sk drives When writing has finished you should reset the system so that the configuration can be stored on the controller However this reset procedure lasts some time and will have a dramatic effect on the host connected up You are therefore given the choice at this point of carrying out the reset procedure now or postponing it until later For the reasons already given we strongly recommend that y...

Страница 54: ...the initialisation once it starts after the reset by selecting Logical Drives Configuration However please be patient It may take Spheras a while to read this information from the controller If Spheras is not responding restart the Agent SB2500 manually If for any reason it may be necessary to initialize the LUNs manually you can do this checking the foreground initialize radio button There will b...

Страница 55: ...o ways note this information is valid for controller version firmware 8 20 onwards a Initialisation is started automatically when the LUN is accessed from the host b Select Logical Drives Configuration and click the Background Initialize button CAUTION BGI is not permitted with firmware version 8 20 still not recommended for firmware 8 57 BGI may fail if a grown defect is found on a harddisk So BG...

Страница 56: ...Configuration There are two kinds of Export Config information files stored a binary Save configuration binary format This file is needed for possible reanimation of a configuration not human readable b html format Under Spheras directory htdocs there will be a file Template html stored overwritten if it exists for easy use This file will be overwritten if it exist already ...

Страница 57: ...6 53 RAID wizard In addition to those files it is recommended to save all the serial numbers of a system in a file This can be easily done using the command from the Spheras directory ssmAnalyze t ALL y C xx config txt ...

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Страница 59: ...hich has not been defined as a spare drive or has not been assigned to a disk group An automatic rebuild can only be operated in case of a failure by the system if a Spare Drive is configured To add a spare drive start by clicking the Spare Drives button on the main RAID Wizard display ...

Страница 60: ...indow which opens select the drive you want to add and then click ADD to make this a spare drive ID 3 ID 18 ID 33 ID 48 When the drive appears in the right hand column select and highlight the drive and then select the Make Spare Drive s button to confirm ...

Страница 61: ...firm the prompt which follows by pressing OK Acknowledge the message telling you that the spare drive or drives has have been successfully created by pressing OK Once you have added spare drives you will be able to call them up on the Spheras menu ...

Страница 62: ...58 U41578 J Z875 1 76 Adding spare drives It is also possible to delete a Spare drive after highlighting it ...

Страница 63: ...Controller Actions If you are shutting down the system for a long time i e more than 68 hours you must first ensure that the controller backup battery unit BBU is electrically disconnected from the controller To do this click the Prepare for Controller Shutdown button The controller is now in a position to distinguish between a power failure and a deliberate user shutdown ...

Страница 64: ...60 U41578 J Z875 1 76 System shutdown At the prompt click OK to confirm the shutdown ...

Страница 65: ...upgrade of a controller The new kid on the block will automatically update the firmware revision of the remaining controller Works for upgrade and downgrade Solaris Linux Because a reset controller is performed during the flash procedure Multipath SMAWmpd set all devices to error This is the expected behaviour The flash procedure performs a reset and asks about 1 minute later whether the controlle...

Страница 66: ...ng instruction usr local elSSM bin ssmFirmware tSB2500_FFx2 i firmware_file After the controller update and before restarting the Spheras Agents the mpd unit must be switched to the nod transparente mode again mpdcontrol o notransparent unit 0 After that restart the agent again ...

Страница 67: ... image date verified successfully the Restarting Controller fails manually perform a reset using a GUI or perform a power cycle of the controller shelf only When the download has been completed start the Spheras agents again The system will automatically display a prompt asking you to restart the storage manager Restart the storage manager as instructed ...

Страница 68: ...Quick expansion best performance due to independent disks b Adding a new LUN by expanding an existing group Advantage Saves disks because in RAID 5 only one parity disk is required c Enlarging an existing LUN Depends on OS only possible if there is a single LUN in a group New Disk Group Old Group New LUN Old LUN 1 New LUN new Group Old LUN 1 Old LUN 2 New LUN larger Group Old LUN 1 Old LUN 2 large...

Страница 69: ...s takes a very long time There is only one controller active It is only possible when a Multi Path software is installed or there is no data transfer The process is not interruptible and no attempt should be made to force any interruption i e switching off or pulling disks While migration is active RAID no protection is given For the Solaris OS method c enlarging an existing LUN is not allowed sin...

Страница 70: ...ports connected to the partner controller will NOT BE AVAILABLE while the Expand Capacity function is running No RAID protection is given while the Expand Capacity function is performed You can only expand a logical unit LUN when this is the only unit in the array Any unused storage areas will be assigned automatically when the Expand Capacity function has been terminated When a new disk is insert...

Страница 71: ...he agents select Refresh Controller the disks will then be recognized by the system You need to declare the added disks as SPARE disks to use them further Starting Expand Capacity Now you can open the Controller card Then the following information screen will be displayed ...

Страница 72: ...e Expand Capacity methods the following warning pops up The status of the partner controller can be observed at the controller information screen under Dual Controller Status When Partner Status has changed to INSERTED you can start with Expand Capacity over again ...

Страница 73: ...7151 MB together with the existing LUN capacity Otherwise all your data will be lost You can select the RAID level of the new group but not the capacity Capacity is always maximum Follow the instructions until the end If you have hit the Finish button a warning pops up In this warning Long means up to 15 days in case of 8k stripes If the system is configured with 64k Stripe size it may only take 2...

Страница 74: ...ed The status LEDs on the system starts to blink There are two phases Migration while the stripes are newly computed and Initialization when the unused space is prepared The proceeding of the process can be viewed After completion of the Expand Capacity function you need to restart the second controller again ...

Страница 75: ...e number of the S80 RAID controller i e of the lowest shelf in the rack The letter R in the controller icon indicates that this is the main controller and that the name of this controller is given to the entire cabinet JBOD expansion units are indicated by the letter J inside the icon There are cases where it will be necessary to change the Cabinet ID If the same number occurs twice in the system ...

Страница 76: ...io button in the Enclosure Control box If you select this button and then Apply the corre sponding LEDs of the configured magnetic disk drive you have selected in the shelf will start to flash This method can be used to identify any duplicate ID numbers Change the number here for example from 240 to 099 and then click the Apply button Cabinet IDs can be in the range from 1 to 255 CAUTION Do not us...

Страница 77: ...g the old ID no 240 this is because the Cabinet ID Spheras agent only requests the number at start up In order to display the correct number go to the browser and proceed as follows Stop the Spheras agents and then restart them see also page 11 The new ID number 099 is now shown in the left hand navigation field on the Welcome page Click the plus sign alongside the R icon The menu tree structure e...

Страница 78: ... If you change the batteries you should also change the installation date setting When you confirm the dates will be stored to memory on the shelf back plane Setting the battery installation date also sets a flag The flag is not automatically activated when the date expires but it is a convenient device for making remote queries without having to look at the date labels on the batteries themselves...

Страница 79: ... idea to carry out initial battery charging immediately after the configuration procedure and before any user data has been stored You can use the initialisation time also to charge the battery Click the Recondition button in the Actions box The message Reconditioning Active will appear in the Status box The functions of the other parameters and buttons in this form are clear from their names and ...

Страница 80: ...le Notification Default No 4 1 1 Log File Name Default None Specified 4 2 Event Log Notification Default No 4 3 Email Notification Default No 4 3 1 SMTP Server Default None Specified 4 3 3 Email Recipient List Default None Specified 4 3 4 Email Sender Address Default None Specified 4 4 SNMP Notification Default No 4 4 1 SNMP Management Station Default None Specified 4 4 2 SNMP Trap Port Default 16...

Страница 81: ... found at ftp FibreCAT_S80 Manuals Spheras Manual_e pdf Installation procedure 1 Install the necessary see Support Matrix Fibre Channel driver lpfc and hbAnyware pkgadd The driver and hbAnyware is available on the Control CD delivered with each Primepower 2 Adjust the lpfc conf settings according the Solaris documentation FibreCAT_S80 Manuals html 3 Adjust the sd conf scan LUNs during boot 4 Insta...

Страница 82: ... the LUNs as desired 64k Stripe Size is recommended Details for configuring see FibreCAT_S80 Manuals Spheras Manual_e pdf Wait until the Foreground init FGI has come to a complete stop may take several days Do not pull push disks during FGI is active 9 Set HBA Fibre Channel Speed to 2 GB s fix using lpfc conf Set topology 4 AL direct attached resp topology 2 Point to Point Switch attached 10 Recon...

Страница 83: ...reCAT_S80 Manuals Spheras Manual_e pdf Installation procedure HBA installation Shut off Primergy Insert Host Bus Adapter HBA into the Primergy Power on the FibreCAT S80 but do NOT connect the S80 to the HBA Power on the Primergy You will see the New Hardware found screen Insert the ServerView CD wait cancel the Server View installation itself Continue until search for suitable driver is displayed ...

Страница 84: ...cation Start MS Explorer go to CD directory programs general MYLEX GAM_FW7 Windows Start setup exe Select Components SAN Array Manager Client and Global Array Manager Server Install GAM SAM following the instructions establish a user under Manage local user groups new user New user gamroot Password example gamroot check checkbox PW never expires Start Mylex GAM SAM Server Groups and the Mylex DAC ...

Страница 85: ...rtant to have explicit LUN 0 not an different number Remember Service bulletin SB STO 0309 Windows Default Maximum Queue Depth Setting for FibreCAT S80 Use Windows disk manager Scan for new devices Write signatures to the new disks Attention Never swap or change disks while the controller shelf is off Never switch off any extension shelf first always first the controller shelf Always wait until a ...

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Страница 87: ...stalling Configuring and Maintanance Comments Suggestions Corrections Submitted by U41578 J Z875 1 76 Fujitsu Siemens Computers GmbH User Documentation 33094 Paderborn Germany Fax 49 700 372 00001 e mail manuals fujitsu siemens com http manuals fujitsu siemens com ...

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Страница 89: ...stalling Configuring and Maintanance Comments Suggestions Corrections Submitted by U41578 J Z875 1 76 Fujitsu Siemens Computers GmbH User Documentation 33094 Paderborn Germany Fax 49 700 372 00001 e mail manuals fujitsu siemens com http manuals fujitsu siemens com ...

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