Dell POWEREDGE R720XD - Manual (Page 30)

Improving NFS Performance on HPC Clusters with Dell Fluid Cache for DAS
30
2. Change the OS I/O scheduler to “deadline”. To the end of the kernel line in
/etc/grub.conf
for
the .14.1 errata kernel, add elevator=deadline.
3. To work around a known error message with the PCIe SSDs, add the following kernel parameter: to
the end of the kernel line in
/etc/grub.conf
for the .14.1 errata kernel, add pci=nocrs.
More details are available at https://bugzilla.kernel.org/show_bug.cgi?id=42606
and https://bugzilla.redhat.com/show_bug.cgi?id=620313.
4. Configure the RAID 0 virtual disk created in Step 1, Section A.2 to be a swap device.
First note the controller ID for the PERC H710P Mini (ID 0) and the device name for the RAID 0
virtual disk (/dev/sdb) from output of the command below.
[root@nfs-dfc ~]# omreport storage controller
List of Controllers in the system
Controllers
ID : 0
Status : Ok
Name : PERC H710P Mini
Slot ID : Embedded
State : Ready
Firmware Version : 21.1.0-0007
Minimum Required Firmware Version : Not Applicable
Driver Version : 00.00.06.14-rh1
<…snip…>
[root@nfs-dfc ~]# omreport storage vdisk controller=0
List of Virtual Disks on Controller PERC H710P Mini (Embedded)
Controller PERC H710P Mini (Embedded)
ID : 0
Status : Ok
Name : Virtual Disk 0
State : Ready
Partitions : Not Available
Hot Spare Policy violated : Not Assigned
Encrypted : No
Layout : RAID-1
Size : 278.88 GB (299439751168 bytes)
Associated Fluid Cache State : Not Applicable
Device Name : /dev/sda
<…snip…>
ID : 1
Status : Ok
Name : Virtual Disk 1
State : Ready