Adaptec 2130SLP User Guide - Page 81
Changing the Read Cache Setting, Changing the Initialize Method, Enabled, Disabled, Actions
UPC - 760884150610
View all Adaptec 2130SLP manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 81 highlights
Chapter 9: Managing Logical Drives and Hot Spares ● 80 Changing the Read Cache Setting When read caching is enabled, the controller monitors the read access to a logical drive and, if it sees a pattern, pre-loads the cache with data that seems most likely to be read next, increasing performance. ● Enabled-The controller transfers data from the logical drive to its local cache in portions equal to the stripe size. Use this setting for the best performance when workloads are steady and sequential. Enabled is the default setting. ● Disabled-The controller transfers data from the logical drive to its local cache in portions equal to the system I/O request size. Use this setting for the best performance when workloads are random or the system I/O requests are smaller than the stripe size. (For more information about system I/O requests, refer to your operating system documentation.) To quickly change the read cache setting, click the logical drive you want; then, in the menu bar, select Actions, click Configure read cache, then select Enabled or Disabled as required. Changing the Initialize Method The Initialize Method setting determines how a logical drive is initialized (prepared for reading and writing), and how long initialization will take. The settings are presented in order of slowest to fastest method. ● Build-(slowest) For RAID 1 logical drives, data is copied from the primary drive to the mirror drive; for RAID 5 logical drives, parity is computed and written. Build is the default setting. Adaptec Storage Manager performs build initializations in the background; you can use the logical drive immediately. ● Clear-Every block in the logical drive is overwritten, removing all existing data. You can't use the logical drive until the initialization is complete. ● Quick-(fastest) The logical drive is made available immediately. Quick initialization should be used for new physical disks only.