Reducing Resync Time - NEC EXP320R Maintenance Manual

Chapter 2 Configuring and Upgrading the System

2.4.3 Reducing resync time

If resynchronization of the hard disk drive requires much time, you can reduce the resync time to change the
minimum/maximum resync speed to 0 KB/sec.
Run the following command to confirm the current speed.
The example below shows the default setting (minimum resync speed: 1,000 KB/sec, maximum resync
speed: 0 KB/sec).
# esxcli –s xxx.xxx.xxx.xxx storage mpm speedLimit
Volume Minimum Maximum
------ ------- -------
volume 1000
Run the following command to specify the minimum/maximum resync speed to 0 KB/sec for all hard disk
drives.
# esxcli –s xxx.xxx.xxx.xxx storage mpm speedLimit --min=0 --max=0
Volume Minimum Maximum
------ ------- -------
volume
To confirm or specify the minimum/maximum resync speed for individual hard disk drive, run the command
with "-v <Device name>". The example below shows that the command is run for device name mpm1.
# esxcli –s xxx.xxx.xxx.xxx storage mpm speedLimit -v mpm1 --min=0
--max=0
Volume Minimum Maximum
------ ------- -------
volume
Express5800/R320e-E4, R320e-M4, R320f-E4, R320f-M4 Maintenance Guide (VMware)
100
Tips By specifying 0 (zero) for the minimum/maximum synchronization speed, the
synchronization speed will not be limited and the synchronization will work with the best
effort.
Note
The minimum/maximum resync speed affects system performance. If it is changed, the
system performance may become lower, therefore care must be taken in changing
configuration.
0
0 0
0 0
The minimum/maximum resync speed is reverted when the ESXi host is rebooted. To use
Note
the setting persistently, let this command be run every time when the ESXi host is started.
Describe the following line in "/etc/rc.local.d/local.sh" file of ESXi host.
esxcli storage mpm speedLimit --min=0 --max=0
Describe the above command in the line above "exit 0".
Refer to the Knowledge Base of VMware for how to describe the /etc/rc.local.d/local.sh file.
<VMware, Knowledge Base - Modifying the rc.local or local.sh file in ESX/ESXi to run
commands while booting (2043564)>
https://kb.vmware.com/kb/2043564
2. Hard Disk Drive Operations