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RAIDWatch User’s Manual
WARNING!
1. Different RAID configurations use different sizes of disk space to
store parity or mirrored data. When migrating from one to another,
disk space might not be enough to hold the original data. So the
total drive spaces of new RAID level must not less than original
RAID level.
2. To avoid possible problems with OS partition table, a logical drive’s
LUN mappings must be deleted before migration.
Select a Stripe Size
Choose different stripe size may affect the performance of RAID
subsystem. Base on the applications, users should choose a best-fit stripe
size to achieve the best data transfer rate. The following stripe sizes are
available: 16KB, 32KB, 64KB, 128KB, 256KB, 512KB, or 1024KB. A
default stripe size is pre-selected.
Select a stripe size, but note that stripe size arrangement has a
tremendous effect on RAID subsystem performance. Changing strip size
is only recommended for experienced users. Stripe size defaulted to this
menu is determined by the subsystem Optimization mode and the RAID
level selected.
Set a Drive Size
In the Drive Size (MB) input box displays the maximum drive size per
selected physical disk (total capacity of each disk). Decreasing this value
can create a smaller logical drive. The remainder can be used later by
expanding the drive (as explained in Section 9.2.3.3.)
9.2.3.6. Click Migrate Logical Drives to Initiate LD
Migration
To initiate the LD expansion, follow these steps:
Step 1. Once the LD migration parameters have been set to the value
desired, click the Migrate LD button at the bottom of the
Migrate Logical Drives page.
Step 2. The migration process begins and you may check the progress in
the Tasks Under Process window.
Step 3. The logical drive will now have a new RAID level, strip size and
drive size. All data will be moved from the old logical drive to
the new logical drive.
9-12 Logical Drive Management
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