Operating instructions

9-8
SCSI REFERENCE 1012975
CHAPTER 9—MODE SELECT (15h)
MaxStorAddr – Byte 4, Bits 2 through 0
This field specifies how many storage elements the autoloader reports and
uses. Valid values for this field are 1 through 7. The factory default is 7.
This field is kept in nonvolatile RAM, and once set, remains in effect, even
between power-on cycles, until changed by this command.
Notes:
The MaxStorAddr field is directly related to the Limit Cells option available from
the autoloader’s operator panel. When this field is set, the autoloader only uses
the number of cartridge cells specified as storage elements. The unused cells are
not available for use as addressable storage elements. The number of cells can
be set, cleared, or viewed using the operator panel or by issuing a MODE
SELECT command with this field set to the desired number of cells.
If both the Fixed Cleaning Cell and Auto-Clean flags are set to 1 on the Cleaning
Configuration Page (see page 9-12), the highest storage element address
indicated by the MaxStorAddr field is used for the cleaning cartridge and is not
accessible using SCSI commands.
The autoloader ignores the MaxStorAddr field if the MaxStor bit is set to 0. If the
MaxStorAddr field is set to 7, the autoloader responds as if the MaxStor bit is set
to 0.
Changes to the MaxStorAddr field do not take affect until the autoloader is reset.
SOPR – Byte 05, Bit 7 (SCSI Operating Parameter Restoration)
This field specifies whether the autoloader restores SCSI operating parameters
when it detects that microcode has been updated, as follows:
0 – Do not restore SCSI parameters after a microcode update
1 – Restore SCSI parameters after microcode update
The factory default is 0.
Normally the autoloader defaults to power on settings and waits for the host
to negotiate. SCSI operating parameters consist of synchronous or
asynchronous transfer, wide or narrow transfer, and transfer rate and offset for
synchronous transfers.
This field is kept in nonvolatile RAM, and once set, remains in effect, even
between power-on cycles, until changed by this command.