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In order to be able to use the gdtmon program under SCO UNIX (2.x, 4.x and 5.x), it be-

comes necessary to substitute the standard terminal entry by a new one:

cd /usr/lib/terminfo <ENTER>

tic gdt386.src <ENTER>

Before each loading of gdtmon, this terminal has to be activated by:

TERM = gdt386 <ENTER>

export TERM <ENTER>

These two lines can also be inserted in the .profile file and will then be automatically

processed during each login. The gdtmon program itself is copied during the SCO UNIX

installation (chapter G of this User's Manual) into the /etc directory. gdtmon is loaded by

entering:

gdtmon <ENTER>

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As mentioned before, the GDTMON program appears identical for all operating systems, so

we can demonstrate the use and functioning of this program regardless of the operating

system used. In previous chapters we have already described the hierarchical structure of

the GDT firmware. We have defined 4 different levels of hierarchy: Level 1 where the physi-

cal devices named Physical Drives are found, level 2 containing the Logical Drives (made up

of one or several Physical Drives), level 3 where we have the Array Drives, and finally, level 4

where the Host Drives are. Only the latter ones are known to the operating system. The

drive of a given level of hierarchy is always set up by using the drives of the next lower level

as components. Accordingly, GDTMON has various menu options, each referring to one

level of hierarchy

+RVW'ULYHV

Level 4

/RJLFDO'ULYHV

Level 2

3K\VLFDO'ULYHV

Level 1

Each menu option displays the performance of the drives belonging to the corresponding

level. (Note: The performance of Array Drives and Host Drives is identical). The perform-

ance is measured in KB/s (kilobyte per second, transfer rate) and IO/s (I/Os per second,

number of simultaneously processed I/Os on the ICP Controller). The performance is dis-

played numerically as well as graphically in the form of variable horizontal bars, with sepa-

rate indications for each drive and its write and read accesses.

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This menu option yields a list of available ICP Controllers. By selecting a protocol, you have

either access to the ICP Controller(s) in your local computer (e.g., MS-DOS, Windows NT,

Windows 95 or OS/2 protocol), or to a ICP Controller in another computer (server or work-

station) in the network (NetWare NCPE or IBM NETBIOS protocol). All diagnosis and main-

tenance functions of GDTMON refer to the ICP Controller you have selected here (and the

hard disks connected with this controller).

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