Dell PowerEdge H730P, Руководство пользователя

Страница: 44 / 101

Parameter Description
Read Policy Read-Ahead enables the read-ahead feature for the virtual disk. You can set
the parameter to Read-Ahead , No-Read-Ahead , or Adaptive-Read-Ahead .
The default is Adaptive-Read-Ahead .
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.
No-Read-Ahead specifies that the controller does not use read ahead for the
current virtual disk.
Adaptive-Read-Ahead specifies that the controller begins using Read-Ahead
if the two most recent disk accesses occurred in sequential sectors. If all read
requests are random, the algorithm reverts to No-Read-Ahead ; however, all
requests are still evaluated for possible sequential operation.
Virtual Disk Management
Creating Virtual Disks
NOTE: Combining SAS and SATA disk drives within a virtual disk is not supported. Also, combining
disk drives and SSDs within a virtual disk is not supported.
NOTE: To create secured virtual disks, see Security Key And RAID Management .
Perform the following steps to create a virtual disk:
1. During host system bootup, press <Ctrl><R> after the BIOS screen is displayed.
The
Virtual Disk Management screen is displayed. If there is more than one controller, the main
menu screen is displayed. Select a controller, and press <Enter>. The Virtual Disk Management
screen is displayed for the selected controller.
2. Use the arrow keys to highlight PERC H730P Adapter or Disk Group # .
3. Press <F2>.
A list of available actions is displayed.
4. Select Create New VD and press <Enter>.
The Create New VD screen is displayed. The cursor is on the RAID Level option. When adding a
virtual disk to a Disk Group, the Add VD in Disk Group screen is displayed. Skip to step 11 to change
the basic settings of the virtual disk.
5. Press <Enter> to display the possible RAID levels.
6. Press the down-arrow key to select a RAID level and press <Enter>.
7. When creating a spanned virtual disk (RAID 50 or 60), enter the number of physical disks per span in
the
PD per Span field and press <Enter>.
8. Press <Tab> to move the cursor to the list of physical disks.
9. Use the arrow key to highlight a physical disk and press the spacebar, <Alt> , or <Enter> to select the
disk.
10. Select additional disks, if required.
11. Press <Tab> to move the cursor to the Basic Settings box.
44