problem in syslog file:

May 28 10:06:57 myhostname multipathd[578]: sda: failed to get sgio uid: No such file or directory
May 28 10:07:02 myhostname multipathd[578]: sda: add missing path
May 28 10:07:02 myhostname multipathd[578]: sda: failed to get udev uid: Invalid argument
May 28 10:07:02 myhostname multipathd[578]: sda: failed to get sysfs uid: Invalid argument
May 28 10:07:02 myhostname multipathd[578]: sda: failed to get sgio uid: No such file or directory
May 28 10:07:07 myhostname multipathd[578]: sda: add missing path
May 28 10:07:07 myhostname multipathd[578]: sda: failed to get udev uid: Invalid argument
May 28 10:07:07 myhostname multipathd[578]: sda: failed to get sysfs uid: Invalid argument
May 28 10:07:07 myhostname multipathd[578]: sda: failed to get sgio uid: No such file or directory


>> this happens if machine is virtual machine ..

my solution:

add a black list to file: /etc/multipath, so that it looks like:
defaults {
user_friendly_names yes
}
blacklist {
device {
vendor "VMware"
product "Virtual disk"
}
}


>> after that run a restart: /etc/init.d/multipath-tools restart

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