Adaptec GDTSETUP Manual de usuario descargar pdf (Pagina 147)

147

This parameter sets the time whereafter 'dirty buffers' are written (flushed) from the cache

of NetWare to the hard disk. The minimum value is 0.8 seconds which influences the server

performance substantially. Therefore, care should be taken not to go below 0.8 seconds.

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If an ICP Controller is operated under NetWare together with a further controller / hosta-

dapter which does not support the ASPI standard, SCSI Raw Devices cannot be operated on

both controllers (tapes, CD-ROMs).

In general, NetWare gives preference to controllers which support the ASPI Standard (GDT,

Adaptec). As soon as ASPITRAN.DSK is loaded (Auto-Loading Module) tapes and CD-

ROMs on the ASPI non-compatible controller are no longer recognized.

To avoid this problem, the file ASPITRAN.DSK can be deactivated via a modification.

Please note: After this modification, no other Raw Devices (tapes, CD-ROMs) are recog-

nized on the GDT (Adaptec,...).

In order to deactivate ASPITRAN.DSK, the string 'ASPI_Entry' has to be found by using a

Disk-Monitor in ASPITRAN.DSK (please pay attention to capitals etc). This string is then

modified, e.g., by replacing 'A' with an 'X' (i.e., 'XSPI_Entry').

This modified ASPITRAN.DSK enables the operation of Raw Devices on the non-ASPI-

compatible Controllers.

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All ICP Controllers temporarily store the status information from all hard disks which are

connected. This information can be very useful when searching for possible causes of disk

failures or interferences. The last status information consists of a hexadecimal, 8 digit

number and can be displayed via the GDTMONitor or can be saved in a SAVE

INFORMATION ASCII file. The information is temporarily available in the ICP Controller's

RAM. Therefore, it is important to check this information before switching off and before

carrying out a Reset if a disk failure has occurred, or if interference was present. The last

status information is divided into Controller-specific and SCSI-specific messages. The most

important Last-Status codes are described in this manual, a more detailed description can

be found in the files LASTSTAT.PDF (Adobe Acrobat format) or LASTSTAT.TXT (ASCII for-

mat) at the ICP vortex Website (http://www.icp-vortex.com).

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The additional capacity resulting from an online capacity expansion of an existing Array

Drive is introduced to the system as a new Host Drive. In order to be able to make use of

the new capacity without having to down the server, type "scan for new devices" on the server

console to recognize the new capacity. Use Install to build new partitions and volumes.

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Please make sure that you always have the latest version of your ARCserve software.

The back-up program ARCserve can be used in connection with the ICP Controller. The

communication between the tape device (for example DAT, DLT) and the ICP Controller

takes place through the ASPI interface. For this purpose, the GDT ASPI Manager

ASPITRAN.DSK is needed. When loading the regular GDT NetWare driver (for example

GDTRP311.DSK), the ASPI Manager is automatically loaded, too. During the installation of

ARCserve, choose

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as interface.

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