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4. HDLM Operation
337
1.
Unmount any devices mounted on the HDLM device.
2.
Execute the
dlmcfgmgr -o
command to exclude the HDLM device from
management.
HDLM devices cannot be used to create an md device.
If you execute the
sync
command on the file system that is mounted by ext3/
ReiserFS, the following message is output to syslog, but there is no problem with
HDLM operations.
JBD: barrier-based sync failed on sddlmaa1 - disabling
barriers
If the number of I/O operations that have occurred in the system exceeds the
execution performance of the system (in an environment in which all of the
conditions below exist), the KAPL05008-E message and the call trace of a kernel
might be output.
•
Hitachi WMS exists in HDLM management-target devices.
•
In the utility for setting HDLM driver option (
dlmsetopt
), the number of
retries for allocating memory is set to 0 through 2,147,483,646.
In this case, the system might become unstable, and an error might occur in the I/
O that is being executed. In the
dlmsetopt
utility, set -1 or a value greater than
the current value for the number of retries for allocating memory, and then restart
the system. If a call trace is output even after the retry count is set to -1, consider
adding memory and stopping unnecessary processes.
When a device is dynamically configured by using the udev function, the error
message KAPL05023-E might be output to the console or syslog. However,
HDLM operations are not affected.
When the
dlmcfgmgr
utility is executed with the
-r
parameter specified, the
error message KAPL05023-E is output to the syslog file. However, HDLM
operations are not affected.
Sometimes a hyphen is displayed for the SCSI device name in the
Device
column of the results of the
dlmcfgmgr
utility (
dlmcfgmgr -v
) or the view
operation of the HDLM command (with either the
-lu
or
-drv
parameter
specified). This might happen if one of the problems listed below occurs while the
system is running, even if the SCSI devices are not erased. This problem is related
to the OS's hot-plug function. HDLM operations are not affected:
•
A path gets disconnected.
•
An LU is deleted.
•
A fiber cable connection is changed.
Содержание Dynamic Link Manager
Страница 1: ...Hitachi Dynamic Link Manager Software User s Guide for Linux R 3000 3 F04 60 E ...
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Страница 79: ...2 HDLM Functions 55 Figure 2 16 Example System Configuration Using HDLM and Global Link Manager ...
Страница 154: ...3 Creating an HDLM Environment 130 Figure 3 1 Flow of HDLM Environment Setup ...
Страница 162: ...3 Creating an HDLM Environment 138 ...
Страница 272: ...3 Creating an HDLM Environment 248 Example of executing the parted command IA32 IPF or EM64T AMD64 ...
Страница 294: ...3 Creating an HDLM Environment 270 see whether the HDLM device corresponding to the SCSI device has been created ...
Страница 309: ...3 Creating an HDLM Environment 285 Figure 3 33 Example of Creating an ext2 File System ...
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Страница 362: ...4 HDLM Operation 338 A Fibre Channel switch s zone setting is changed ...
Страница 375: ...4 HDLM Operation 351 ...
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Страница 549: ...8 Messages 525 HDLM driver filter component HDLM alert driver HDLM management target ...
Страница 590: ...8 Messages 566 dd dd Maintenance information hexadecimal number Action None ...
Страница 594: ...8 Messages 570 aa aa Name of file where error was detected Action Reinstall an HDLM ...
Страница 707: ...8 Messages 683 KAPL15404 W The HDLM Manager was executed by the user who does not have the authority ...
Страница 713: ...8 Messages 689 utility see 7 2 DLMgetras Utility for Collecting HDLM Error Information ...
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