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Chapter 5 Configuration Menu
> 5.2 RAID Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
163
Copyright 2010 FUJITSU LIMITED
P2X0-0760-02ENZ0
(Example 1) When changing to the same RAID level
- When changing from RAID1+0(6+6) to RAID1+0(3+3)
Total number of disks: 12 > 6, so LDE cannot be performed
- When changing from RAID1+0(6+6) to RAID1+0(8+8)
Total number of disks: 12 < 16, so LDE can be performed
(Example 2) When changing to a different RAID level
- When changing from RAID1+0(6+6) to RAID5(3+1)
Number of data disks: 6 > 3, so LDE cannot be performed (Total number of disks: 12
→ 4)
- When changing from RAID1+0(6+6) to RAID6(6+2)
Number of data disks: 6 = 6, so LDE can be performed. (Total number of disks: 12 → 8)
- When changing from RAID1+0(6+6) to RAID5(7+1)
Number of data disks: 6 < 7, so LDE can be performed (Total number of disks: 12
→ 8)
5 Click the [OK] button to execute the process.
→ The [Logical Device Expansion (Updating Configuration Information)] screen appears.
When the process is completed successfully, the [Logical Device Expansion (Result)]
screen appears.
In the following cases, an input error screen appears.
• When selecting 33 or more disks.
• When the configuration of the RAID Group to be created is
abnormal
Depending on the RAID level, range of the number of disks and
restrictions of disk layout vary. For the range of the number of
disks and disk layout restrictions, refer to "The number of
selected disks for each RAID Level" (page 162) and "Restrictions
of disk layout" (page 162).
• When the new RAID Group does not satisfy the conditions
required to perform the LDE.
These conditions depend on whether the RAID levels before and
after the LDE are the same or not. For details, refer to "
Effect of
RAID level on LDE disk selection requirements" (page 162).
• When the capacity of the RAID Group to be created is smaller
than that of the RAID Group before the LDE execution.
• The total capacity of the Logical Volumes defined in the RAID
Group is larger than the capacity of the RAID Group to be
created.
• When the configuration of the RAID Group to be created is the
same as the configuration of the RAID Group before the LDE
execution.