
Acer | HDS WMS100™ User and Reference Guide
125
7.3.7
Formatting a Logical Unit
Note 1:
For the logical unit that is being formatted in the background, it is best to perform
operations to the host installation.
If a volatile failure for data in cache memory occurs due to subsystem power-off during
formatting, the logical unit will be unformatted and data can be lost. Therefore, host
installation operation should be performed from the first step for the logical unit.
Note 2:
When logical units are formatted, the user data will be initialized and completely
deleted.
Note 3:
RAID group allocated to NAS system LU used and user LU at the time of NAS
connection cannot be deleted without releasing the allocation.
Note 4:
Formatting will impact the host access performance, especially on the logical unit
being formatted and on the logical unit in the same RAID group as the logical unit being
formatted. Execute formatting during off-hours with less host access.
When formatting the logical unit in the same RAID group as NAS system LU, do not boot or
reboot the NAS OS. This could result in boot failure or increase in boot time of NAS OS.
Format
This mode enables the subsystem to start its operation earlier by formatting the
specified LU in the background to make it usable by a host. Up to 512 LUs can be
specified for formatting. This number can also be increased; however, the number of
LUs that can be simultaneously formatted in the background is six per CTL. When
executing formatting, the Storage Navigator Modular program can perform operations
(such as a RAID group creation) while the formatting is being executed.
When the Storage Navigator Modular program is terminated while formatting is executed,
the formatting function is continued. When the Storage Navigator Modular program is
terminated while formatting is executed, the formatting progress is displayed by
percentage in the logical unit status column when the Storage Navigator Modular
program is activated again.
When the host I/O is executed for the LU in formatting, Format completion may be
delayed; from the 99 % progress status, it may take 400 seconds (maximum).
To format a logical unit, follow these steps:
1.
Click the icon of a logical unit in the Unit window. On the Settings menu, select Logical
Unit, and then click Format.
Note 1
When you select multiple logical units, hold down the Ctrl key and click the icons of
the logical units to format.
When a logical unit is incorrectly specified, press the Cancel button and redo processing by
selecting a logical unit to be reformatted.
Note 2:
In the ShadowImage in-system replication, or Copy-on-write SnapShot, PAIR cannot
be defined for the LU being formatted. LU defined as PAIR cannot be formatted.
Содержание HDS WMS100
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Страница 8: ...viii Preface ...
Страница 12: ...xii Preface ...
Страница 22: ...xxii Contents ...
Страница 40: ...18 Chapter 2 Planning for Installation and Operation Figure 2 1 Position of Labels on Floor Model RKXS H1J ...
Страница 41: ...Acer HDS WMS100 User and Reference Guide 19 Figure 2 2 Position of Labels on Floor Model RKXS RKAJAT H2J ...
Страница 42: ...20 Chapter 2 Planning for Installation and Operation Figure 2 3 Position of Labels on Rack Mount Model RKXS ...
Страница 43: ...Acer HDS WMS100 User and Reference Guide 21 Figure 2 4 Position of Labels on Rack Mount Model RKNAS ...
Страница 44: ...22 Chapter 2 Planning for Installation and Operation Figure 2 5 Position of Labels on Rack Mount Model RKAJAT ...
Страница 56: ...34 Chapter 2 Planning for Installation and Operation ...
Страница 64: ...42 Chapter 3 Powering On Off Procedure ...
Страница 132: ...110 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem Figure 7 1 Fibre Channel Setting ...
Страница 139: ...Acer HDS WMS100 User and Reference Guide 117 Figure 7 3 Logical Status Tab NAS Figure 7 4 RAID Group Dialog Box ...
Страница 146: ...124 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem When a formatted logical unit exists Ð Ð Ð ...
Страница 157: ...Acer HDS WMS100 User and Reference Guide 135 The mapping information is updated and the following window displays ...
Страница 188: ...166 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem Ð ...
Страница 192: ...170 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem ...
Страница 213: ...Acer HDS WMS100 User and Reference Guide 191 Figure 8 7 NNC Information Screen ...
Страница 222: ...200 Chapter 8 Troubleshooting 4 Clear specified factors of NNC partial alarm 5 Click the Recovery button ...
Страница 252: ...230 Chapter 8 Troubleshooting ...
Страница 270: ...248 Appendix B System Parameter Settings List ...
Страница 316: ...294 Appendix F List of Storage Capacities Corresponding to RAID Levels and Configurations ...
Страница 320: ...298 Appendix G Port Address Mapping Table ...
Страница 326: ...304 Appendix I Number of Logical Blocks ...