Dell PowerEdge RAID Controller 11 User’s Guide PERC H755, H750, H355, and H350 Controller Series

Configure virtual disk parameters

1. Create a virtual disk, see Creating the virtual disks.
   The Configure Virtual Disk Parameters section is displayed on the Create Virtual Disk screen.
2. In the Configure Virtual Disk Parameters section, you can set the following virtual disk parameters:

   Table 1. Configure virtual disk parametersThis table provides information about configuring virtual disk parameters.

   Virtual disk parameters	Description
   Virtual Disk Name	Allows you to enter the name for the virtual disk NOTE:Allowed characters are A-Z, a-z, 0-9, underscore (_), and hyphen (-) only.
   Virtual Disk Size	Displays the maximum capacity available for the virtual disk
   Virtual Disk Size Unit	Displays the virtual disk storage space in megabytes, gigabytes, and terabyte.
   Strip Element Size	Allows you to select the strip element size The disk striping involves partitioning each physical disk storage space in stripes of the following sizes: 64 KB, 128 KB, 256 KB, 512 KB, and 1 MB. By default, the strip element size is set to 256 KB.
   Read Policy	Displays the controller read policy You can set the read policy to: No read ahead—specifies that the controller does not use read ahead for the current virtual disk. Read ahead—specifies that the controller uses read ahead for the current virtual disk. Read ahead capability allows the controller to read sequentially ahead of requested data and store the additional data in the cache memory, anticipating that the data is required soon. By default, the read cache policy is set to read ahead.
   Write Policy	Displays the controller write cache policy You can set the write policy to: Write through—the controller sends a data transfer completion signal to the host when the disk subsystem has received all the data in a transaction. Write back—the controller sends a data transfer completion signal to the host when the controller cache has received all the data in a transaction. By default, the write policy is set to Write Back.
   Disk Cache	Allows you to set the disk cache policy to default, enable, or disable. By default, the disk cache is set to default.
   Default Initialization	Displays the virtual disk initialization options. You can set the default initialization to: No — The virtual disk is not initialized. Fast — The first 8 MB of the virtual disk is initialized. Full — The entire virtual disk is initialized. For more information, see Virtual disk initialization. By default, the default initialization is set to No.