Write Cache Settings - Adaptec 2110S User Manual

Adaptec Storage Manager Pro User's Guide
Select the stripe size that you want to use most often based on your
needs or use the following table. For some types of arrays, the
controller may override your selection to ensure good performance.
Array Type
Stripe set (RAID 0),
RAID 5 set, or
stripe set of mirror
sets (RAID 0/1)
Stripe set (RAID 0)
RAID 5 set
Stipe set of mirror
sets (RAID 0/1)
Stripe set of RAID 5
sets (RAID 0/5)
You can set the default stripe size to use in array creation in the
Default Array Creation Properties dialog box. See Viewing and
Setting the Default Array Creation Properties on page 2-8.

Write Cache Settings

Storage Manager Pro supports both read and write cache. However,
not all controllers support both. The cache options work only if you
are using a controller that supports caching.
Write cache speeds write operations by temporarily storing write
data in cache until the disk drives are available to write the data.
Read cache speeds read operations by storing recently read or
written data in cache and by reading ahead in the data.
Most controllers allow you to change settings only for the write
cache.
You can also change these settings later if you add a controller that
supports cache in the future. To see whether the cache is working,
you can check the status and change the settings in the array
properties, Cache tab. See Viewing Array Properties on page 3-8.
When you perform a normal system shutdown, the controller
2-12
Recommended Stripe Size for Best Performance
• Default—Storage Manager Pro selects the
best stripe size based on the array type.
64 KB
• If write cache is enabled: 64 KB.
OR
• If write cache is not enabled: 8 KB or 16 KB.
See Write Cache Settings on page 2-12.
64 KB
Only default setting available.