Dell 341-7212 User Guide - Page 26

Using Auto Configuration on a Dell PERC 5/i Controller or on a Dell PERC 6/i Controller, Direct IO

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Direct IO: In this mode, reads are not buffered in cache memory. Data is transferred to cache and the host concurrently. If the same data block is read again, it comes from cache memory. • Access Policy: Select the type of data access that is allowed for this logical drive: Read/Write, Read Only, or Blocked. • Disk Cache Policy: Select a disk cache setting for this disk: Unchanged, Enabled, or Disabled. NOTE: The disk cache setting applies to the whole disk group; it cannot be set on an individual virtual disk. Changing the setting on a virtual disk causes the setting to change for the disk group. • Init State: No Initialization: The new configuration is not initialized and the existing data on the disks is not overwritten. Fast Initialization: Dell SAS RAID Storage Manager quickly writes zeroes to the first and last 10 Mbyte regions of the new virtual disk and then completes the initialization in the background. This allows you to start writing data to the virtual disk immediately. Full Initialization: A complete initialization is done on the new configuration. You cannot write data to the new virtual disk until the initialization is complete. This can take a long time if the disks are large. NOTICE: If you initialize a drive on which the operating system is installed, you will overwrite the Operating System and potentially make the system nonfunctional. Using Auto Configuration on a Dell PERC 5/i Controller or on a Dell PERC 6/i Controller Auto Configuration is the quickest and simplest way to create a new storage configuration on a Dell PERC 5/i controller or on a Dell PERC 6/i controller. When you select Auto Configuration mode on the first Configuration Wizard window, the Configuration wizard creates the best configuration possible using the available physical disks. Follow these steps to create a new storage configuration in Auto Configuration mode: 1 Select a PERC SAS 5/i or a PERC SAS 6/i controller in the left panel of the Dell SAS RAID Storage Manager window, and then select Operations-> Configuration-> Configuration Wizard. 26 Configuration

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26
Configuration
Direct IO:
In this mode, reads are not buffered in cache memory. Data is
transferred to cache and the host concurrently. If the same data block is
read again, it comes from cache memory.
•
Access Policy:
Select the type of data access that is allowed for this logical
drive:
Read/Write
,
Read Only
, or
Blocked.
•
Disk Cache Policy:
Select a disk cache setting for this disk:
Unchanged
,
Enabled
, or
Disabled.
NOTE:
The disk cache setting applies to the whole disk group; it cannot be set
on an individual virtual disk. Changing the setting on a virtual disk causes the
setting to change for the disk group.
•
Init State:
No Initialization
: The new configuration is not initialized and the existing
data on the disks is not overwritten.
Fast Initialization
: Dell SAS RAID Storage Manager quickly writes zeroes
to the first and last 10 Mbyte regions of the new virtual disk and then
completes the initialization in the background. This allows you to start
writing data to the virtual disk immediately.
Full Initialization
: A complete initialization is done on the new
configuration. You cannot write data to the new virtual disk until the
initialization is complete. This can take a long time if the disks are large.
NOTICE:
If you initialize a drive on which the operating system is installed,
you will overwrite the Operating System and potentially make the system non-
functional.
Using Auto Configuration on a Dell PERC 5/i Controller or on a Dell
PERC 6/i Controller
Auto Configuration is the quickest and simplest way to create a new storage
configuration on a Dell PERC 5/i controller or on a Dell PERC 6/i controller.
When you select Auto Configuration mode on the first Configuration
Wizard window, the Configuration wizard creates the best configuration
possible using the available physical disks.
Follow these steps to create a new storage configuration in Auto
Configuration mode:
1
Select a PERC SAS 5/i or a PERC SAS 6/i controller in the left panel of
the Dell SAS RAID Storage Manager window, and then select
Operations-> Configuration-> Configuration Wizard
.