IBM TotalStorage DS300 Best Practices Manual page 620

If the logical drive is a mirror set or snapshot, you can use these commands after
the global mirror and snapshot commands, or by preceding them by mirror or
snapshot.
Command
chap user
create
destroy
down
info
list
manage
up
chap user [clear | chap user] | info | password
Manage Challenge Handshake Authentication Protocol (CHAP) details for logical
drives. Enter chap user to display the current username for CHAP authentication.
Enter chap user username to set a new username. Enter chap password to
prompt for a new password.
create logical_drive_name available_array available | size
restricted | unrestricted
Create a new logical drive with a user name of logical. The IQN name that the
initiator uses to access this logical drive is automatically generated. The
character set used for a logical drive must be the character set which is valid for
an IQN.
The logical drive takes its space from the named array. Size is entered in bytes,
as a percentage of the total size of the pool. If the size is not specified, all of the
available space in that pool is used.
The Access Control must be explicitly defined using the restricted or
unrestricted option. If you enter restricted, you must also enter a list of initiators
which will be used to define the initial ACL.
602
IBM TotalStorage DS300 and DS400 Best Practices Guide
Parameters
[clear | chap user] | info | password
logical_drive_name available_array available | size
restricted | unrestricted
logical_list
logical_drive_up
[logical_list]
logical (see logical manage logical commands)
logical_drive_down
Levels
administrator
administrator
administrator
administrator
all
all
administrator