Hitachi Compute Blade 2000 User Manual page 1393

 Notes
(1) Notes on Telnet Connection
You can change a port number to specify when connecting to a guest screen

via Telnet, which needs to be different from a port number for LPAR manager.
See Port numbers used by LPAR manager
not be available depending on the OS settings, account privilege, installation
software, or network environment. Check which port is available on the
terminal and in the network environment before changing the port number.
When there is no problem for use, it is recommended that you use a default
port number among serial numbers starting from 20801 that have been
thoroughly verified.
Only one terminal per LPAR is permitted to operate guest screens from the

virtual COM console. If a connection to two or more terminals is attempted, the
connection to the second or additional terminals is disabled.
If the screen shows nothing when connected to the virtual COM console, check

the settings for the serial console.
(2) Notes on Guest Screen Operation
Although the virtual COM console can operate multiple LPARs concurrently,

the performance of consoles of other LPARs might decrease with an increase
in output data. For this reason, operation with text data output of several
hundreds of lines per second should not be performed simultaneously to three
or more LPARs.
If a large amount of characters are pasted to a guest screen, a part of

characters might not be pasted. 256 or more characters per line for the
Windows command prompt, and 1024 or more characters per line for Linux
prompt cannot be pasted. In addition, if 1024 or more characters are pasted for
the Linux prompt, Linux might hang up or unexpected screen operation might
occur. The number of characters that can be pasted without being lost is less
than 256 per line for the Windows command prompt, less than 1024 per line for
the Linux prompt, and less than 10000 per line for editing programs including
the Vi editor. When pasting characters, it is recommended that a large amount
of characters be divided into several blocks (up to the upper limit of characters
per block), and then be pasted.
When you connect the system to the virtual COM console and boot the guest

OS, Windows might halt its boot with the EFI screen; Linux might halt its boot in
the grub console - though rarely. If it happens, press Enter to resume the boot.
(3) Notes on Operation
Connect to the virtual COM console as necessary, and do not stay connected

to it because input and output operation might halt. If this happens, re-connect
the virtual COM console. We recommend that VC (virtual COM console) on the
Logical Partition Configuration screen should be assigned to an LPAR when
needed and the assignment should be released when not needed.
If you repeatedly change settings for VC (virtual COM console) on the Logical

Partition Configuration screen with the virtual COM console connected, the
console screen might be disturbed. If so, perform Edit (E) > Screen clear (S)
in TeraTerm to clear the screen, which can correct the screen disturbance.
for details. Some port numbers may
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