Chapter 5 Installing the File System Driver
© 2017 Harmonic Inc. All rights reserved. 168 Harmonic MediaGrid Release 4.1
Installing the Harmonic MediaGrid File System Driver for Linux
c. Perform the following:
$sudo echo “net.inet.tcp.delayed_ack=0” >>/etc/sysctl.conf
d. Restart the client computer.
Settings for OS X 10.9.5 or Later With Certain NICs
IMPORTANT: There have been multiple issues with particular network interfaces and drivers with recent
versions of the OS. Please consult the Harmonic MediaGrid Macintosh FSD Release Notes for recommended
/etc/sysctl.conf settings. Also, check the manufacturer's website and verify that the driver for the network
interface is up-to-date.
If you are running OS X 10.9.5 or later and your Mac FSD client uses any of the following 1GbE
NICs:
Intel* 82574L (supported in OS X 10.10.x and later)
Broadcom* 57762
Broadcom* 57766-A1
edit the /etc/sysctl.conf file on your Mac FSD client as follows:
net.inet.tcp.delayed_ack=0
net.link.generic.system.sndq_maxlen=512
net.classq.sfb.allocation=100
Restart the Mac FSD client for the change to take effect.
You may want to apply these settings if you are using other 1GbE NICs and experience
performance problems.
Installing the Harmonic MediaGrid File System Driver for Linux
Follow these instructions to install the Harmonic MediaGrid FSD for Linux. See the latest
Harmonic MediaGrid Release Notes for the currently supported Linux operating systems. Make
sure that you have downloaded the file system driver for your client platform before continuing.
Refer to Downloading the File System Driver for instructions.
Verifying the Kernel Version
Prior to installing the Harmonic MediaGrid FSD for Linux, you need to verify the kernel version.
1. Unpack the downloaded Linux zip file.
2. Enter the password provided by Technical Support.
3. Select the rpm file that matches your distribution. See the list of distributions in the latest
Harmonic MediaGrid Linux FSD Release Notes.
4. Use the “rpm –qip” command to view the rpm header, for example:
rpm –qip MediaGridFSD-3.5.0.020070515_3.5.0.0_1.2142__FC4smp.x86_64.rpm
The last line of the header contains the kernel version for which the FSD was built.
5. Verify that your current kernel matches the version displayed by using the following
command:
uname –r
Do not continue if the kernel versions do not match. Contact Technical Support for more
information.
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