LaCie 131018 - StorView Snapshot - Mac, User Manual

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Configuring a Storage Solution
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5 Choose the chunk size. Click the pull-down menu and select a chunk size (64K, 128K, or 256K).
Chunk size is the amount of data that is written on a single drive before the controller moves to the next
drive in the stripe.
For RAID level 0, 1, or 10, choose the correct size from the tables below. For RAID 5/50/6, refer to the
note below.
Note To achieve optimum RAID 5/50/6 write performance you should consider setting the chunk size based
on the specified number of drives for a Full Stripe Write when configuring RAID 5/50/6 arrays, for detailed
information
see ”Optimizing Write Performance” beginning on page 185. For optimum performance, you
want to do as many full stripe writes as possible.
Note The controller firmware will automatically set the chunk size if a smaller chunk size is selected than the
value recommended for the number of drives and specified RAID level.
6 Select to Initialize the array. The default setting is to initialize, so you will just verify this setting. If it is not
set, click the pull-down menu and choose Initialize.
Figure 6–6 RAID 6 Drive Mismatch Condition (RS-4835-F4-5404E Shown)
RAID 0
Number of Drives 1 2 3 4+
Minimum Chunk Size 256K 256K 128K 64K
RAID 1 & RAID 10 RAID 10 (0+1)
Number of Drives 2 4 6 8+
Minimum Chunk Size 256K 256K 128K 64K