HP Hitachi Dynamic Link Manager Software - Manual (Page 478)

A. Functional Differences Between Versions of HDLM
454
Offline(E) Status in A.8 Path Status Transition and Automatic Path
Switching.
A.10 Differences in the Drive Letters Displayed in Windows
Depending on the HDLM version, the Windows' drive letters that are displayed when
all paths connected to the LU have an error status differ as follows:
• When the LU dynamic removal function is not used in HDLM 5.4
Drive letters are displayed for the disks that are displayed in My Computer.
• When the LU dynamic removal function is used in HDLM 5.4, or 5.5 or later, or
when the function is not used in HDLM 5.5
Drive letters are not displayed for the disks that are displayed in My Computer.
A.11 Differences in Default Values
Depending on the HDLM version, default values for various HDLM functions differ
as follows:
„ Default value for path health checking
• In HDLM 04-00 or earlier:
off
• In HDLM 05-00 or later:
on
. The checking interval is 30 minutes.
„ Default value for error log file size
• In HDLM 5.4 or earlier: 1000 KB. Note that this item name in HDLM 5.4 or
earlier is Log file size.
• In HDLM 5.4 or later: 9900 KB
„ Default value for automatic failbacks
• In HDLM earlier than 6.0:
off
• In HDLM 6.0 or later:
on
„ Default value for the load balancing algorithms
• In HDLM 6.0 or earlier:
rr
(Round Robin)
• In HDLM 6.0.1 or later:
exlio
(Extended Least I/Os)
•
Also, the value of the load_balance_type key for the
following file has changed from rr to exlio
:
the sample
file sample_installhdlm.ini for the
installation-information settings file used by the
installhdlm utility for installing HDLM