Dell EMC VxFlex Ready Node 13G Manual page 54

Preparing Disks
Verify the storage and disk controller status
Hardware Configuration and Operating System Installation Guide - Windows Servers
54
When creating virtual devices, note the following:
Create one virtual device for each kind of disk, HDD or SSD.
l
When DAS Cache is not used, configure the VDs for HDD with Direct IO, write-
l
back, and read-ahead enabled (abbreviated in PERCCLI as RWBD).
When DAS Cache is used, configure the VDs for HDD with Direct IO, write-
l
through, and read-ahead enabled (abbreviated in PERCCLI as RWTD).
Configure the VDs for SSD with Direct IO and write-through, with read-ahead not
l
enabled (abbreviated in PERCCLI as NRWTD).
In the PERCCLI commands that follow, the controller ID is assumed to be 0,
designated by /c0. In some cases, the controller ID may be different, which will cause
a Controller 0 not found error to be displayed. If this occurs, determine your
controller ID by running the following command:
perccli64.exe show
The controller ID is displayed in the System Overview section of the output, in the
Ctl column.
The following table lists different disk configurations on a VxFlex Ready Node server:
Node contains
HDD for storage
Mix of HDD and SSD for storage
Mix of HDD and SSD, where some
HDDs or SSDs are for storage and
others provide acceleration
Before creating VDs, you must gather some information on the disks/devices on each
node.
Before creating virtual devices (VDs), verify the storage and disk controller status.
In this task, use the PERCCLI utility to perform the following tasks:
Verifying that all the disks are in UGood (unconfigured, but good) status
l
Removing all the existing VDs from the node
l
Setting up the controller card boot parameter
l
Procedure
1. Log in to the node.
2. Display the disk information on the node:
perccli64.exe /c0/eall/sall show
Output similar to the following is displayed:
Caching options
NA
Caching not used
RFcache
l
DAS Cache
l