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scsi204
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!SCSIMgr
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1992-03-18
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CUMANA SCSI MANAGER - GENERAL OPERATING INSTRUCTIONS
1.0 INTRODUCTION
Firstly, you may like to print this file to refer to while you explore or
use SCSI Manager for the first time.
SCSI Manager is designed to enable you to set up and control the Small
Computer System Interface (SCSI - pronounced scu-zee) devices attached to
your Acorn RISC computer. Examples of SCSI devices currently available
are hard disc drives (winchesters), magneto-optical drives and CD-ROM
drives. Before using such devices with your computer you may need to
carry out a number of tasks such as setting the ID number of your SCSI
interface card (host adapter) or formatting, verifying and partitioning a
hard drive. These tasks are usually carried out at the command line, but
with SCSI Manager the job is made much simpler by using multiple windows
and icons that appear on the screen.
1.1 SCSI MANAGER FEATURES
SECURITY As with any software program which controls the set up of your
computer system, e.g. network management software, it is of paramount
importance to be able to limit access to those who are authorized. There-
fore, SCSI Manager incorporates three levels of security, two of which use
passwords to control access. The third level of security disables the use
of the command line for makeing SCSI settings.
ON-LINE & CONTEXT SPECIFIC HELP The bottom right hand window contains
text which briefly explains the function of the item which the arrow is
currently pointing at. A more detailed description can be accessed at any-
time by selecting the appropriate window heading, or by clicking on the
bottom right window itself.
2.0 INSTALLING AND RUNNING SCSI MANAGER
SCSI Manager can be run either from a floppy disc or from your hard disc.
To boot the program, double click on the application !SCSIMgr in the normal
way. A password entry window will be displayed and if no password has yet
been set the message will be 'Set New Password'. If a password has been
set the message will read ' Enter Password'. Once the password has been
entered, or if one hasn't been set, click the OK button and then wait a few
seconds while the computer searches for any SCSI devices attached to your
system.
If the program is running correctly you will see four windows on the screen, three of which are labelled Devices, Partitions, and Drives. The fourth
window, in the bottom right corner, is a help window, the contents of which
will change as the pointer is moved to different parts of the screen.
The window can be closed by clicking the cross in the top left corner. This
does not quit the SCSI Manager program. To re-open the window select SCSI
Manager from the icon bar.
2.1 AN IMPORTANT MESSAGE ABOUT SECURITY
As explained in the Introduction there are three levels of security which
should deny any unauthorized people from changing the SCSI settings you
have on your system.
2.1.1 Entry Password - You can enter a password which is required to get
into the SCSI Manager program itself. This makes that particular copy of
SCSI Manager secure but would not stop another copy, with a different pass-
word, being used on your system. The password can be changed at anytime by
selecting 'Password' from the menu and following the on-screen prompts. On
the occasions when you are required to enter the password you have three
opportunities to enter the correct one. Access is denied after the third
incorrect attempt. Warning! This level of security does not mean that your
system's settings cannot be changed. If someone else has a copy of SCSI
Manager for which a different password has been set, THAT copy can be used
to change the settings of your system.
2.1.2 Disabling *commands - If you want to increase security, you can
prevent SCSIFSMap settings being altered at the command line. To do this
you should select Host in the Devices window, click on the Set Host ID
button, click OK in the warning window and then click in the box opposite
Enable *Config: (the default is Enable). Click OK to close the window.
The setting will be invoked when you next boot the system (CTRL-BREAK or
CTRL-RESET).
2.1.3 Lock system - A more secure way of ensuring that the SCSI settings
are not changed is to use the Lock system facility. This requires that the
same copy of SCSI Manager which was used to lock the system, is used to
gain access; OR the person trying to access the system needs to know both
passwords, i.e. SCSI Manager's entry password and the system password. To
engage the lock, select Lock system from the menu. A message window will
ask you to confirm that you wish to lock the system, click the OK button if
you wish to proceed. In the message window which follows, type in the
entry password and click OK. The settings will now be secure until someone
who knows the correct password gains entry. If for some reason the SCSI
Manager and system passwords differ you must first enter the SCSI Manager
password and then change it so that is matches the system password.
***Warning! If the 'Lock system' has been invoked and you have forgotten
the password you cannot bypass the security! The only way to gain access
is to return the SCSI interface to Cumana - NOT the copy of SCSI Manager -
so that we can unlock it.***
3.0 THE DEVICES WINDOW
All the SCSI devices attached to your system, including the SCSI interface
(host adapter) are listed in this window (if there are more than four in
the list use the scroll bars to move up and down). The list contains the
following information about each of the devices:
Dev: Device SCSI ID No. (in the range 000-007);
Type: Type of device, e.g. Host, the SCSI interface itself; CD-ROM, etc;
Size: Capacity of device in Megabytes;
Vendor: Name of device manufacturer;
Product: Manufacturers identifying code or name;
Rev: Firmware version number.
NOTE: If you have two or more SCSI interfaces installed in your system the second digit in the SCSI ID number will alter accordingly.
You cannot change any of the information contained in this list. You
simply select the device of your choice and relevant options in the form of
buttons will appear below the list.
3.1 The Format button - If you wish to format the device, e.g. a hard
drive, click the OK button to continue. Note that if you proceed with this
function it will destroy all the data contained on the device. Be very
careful!! Some devices, e.g. optical drives, may take quite a few minutes
to format. It is normal to perform this procedure on newly acquired writable
devices or media.
3.2 The Verify button - Select this button if you wish to check the
device for faulty blocks. Verifying is usually carried out when a device
has just been formatted, but it can be performed at any time, even whilst
data is stored on it. If bad blocks are found this will be reported and the
option given to re-assign them. Re-assigning blocks is effectively marking
the bad blocks as unusable and allocating an alternative block. Note that
if the device has been partitioned you can verify either a single partition
or the whole device. Cancelling the verification procedure mid-way through
the operation will not corrupt or damage your data or device.
3.3 The Parameters button - Select this button only if you are sure that
you know what you are doing! A list of the device's low-level parameters
- Blocks Per Track, Heads, Cylinders and Block Size are shown in a window.
These are normally read from the device automatically, but can be altered
by the user if circumstances require this, e.g., for use of a non-standard
or unsupported device. New parameters can be saved to the drive by
clicking on the Save Parameters button.
3.4 The Dismount button - This button will appear if the device you have
selected is currently in use (mounted) and the message 'SCSI driver reser-
vation error' will appear in the Partitions window. You will have to click
the Dismount button before any further action can be taken on this device.
When you have dismounted the device, per