2. HDLM Functions
29
Executing the online operation places the offline path online. For details on the
online
operation, see
6.5 online (Places Paths Online)
. After a path status is
changed to online, the path can be selected as a useable path by HDLM in the same
manner as automatic path switching. When using the Thunder 9500V series, or Hitachi
AMS/WMS series, HDLM selects the path to use from online owner paths, and then
from online non-owner paths. When the Lightning 9900 series, Lightning 9900V
series, Hitachi USP, Universal Storage Platform V/VM, Virtual Storage Platform,
Hitachi AMS2000 series, or Hitachi SMS is being used, since all the paths are owner
paths, the path to use is not switched even if you change the path status to online by
using the
online
operation.
2.8.3 Path Status Transition
Each of the online and offline statuses described in
2.8 Performing Failovers and
Failbacks Using Path Switching
is further subdivided into two statuses. The following
explains the two online path statuses and the two offline statuses.
(1) The Online Path Status
The online path statuses are as follows:
•
Online
I/Os can be issued normally.
•
Online(E)
An error has occurred on the path, but none of the other paths that access the same
LU are in the
Online
status.
If none of the paths accessing a particular LU are in the
Online
status, one of the
paths is changed to the
Online(E)
status. This ensures that the LU can be
accessed through at least one path.
The (E) means
error
, which indicates that an error has occurred on the path from
some previous operation.
(2) The Offline Path Status
The offline path statuses are as follows:
•
Offline(C)
The status in which I/O cannot be issued because the
offline
operation was
executed. For details on the
offline
operation, see
6.4 offline (Places Paths
Offline)
.
The (C) indicates the command attribute, which indicates that the path was placed
offline by using the command.
•
Offline(E)
Содержание Dynamic Link Manager
Страница 1: ...Hitachi Dynamic Link Manager Software User s Guide for Linux R 3000 3 F04 60 E ...
Страница 4: ......
Страница 16: ......
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 ...
Страница 352: ......
Страница 362: ...4 HDLM Operation 338 A Fibre Channel switch s zone setting is changed ...
Страница 375: ...4 HDLM Operation 351 ...
Страница 410: ......
Страница 546: ......
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 ...
Страница 714: ......
Страница 738: ......