A website about linux, kvm,gluster, ceph, kubernetes and programming
To Retrieve/display the UUID of a scsi device we can use “scsi_id” command .. The output of the command shows the UUID of the device. UUID is unique so it is used as primary key to the device. Also, these identifiers are persistent across reboots For ex: To retrieve UUID of my ‘sda’ device …
Device mapper multipath . Guys, it is true from my heart that understanding a multipath solution ( especially device-mapper-multipath) is a simple process. I am more familiar with the multipath solution “device-mapper-multipath” which shipped with the #1 enterprise release RHEL ( Red Hat Enterprise Linux ) . The mulitpath solution is achieved with the kernel …
Long time I was trying to interpret “dm” table for a multipath device ( here I am pointing device-mapper-multipath solution) .. Some months ago I was able to .. Thought of sharing it in my space., if somebody can take advantage of it.. -snip– 0 71014400 multipath 0 0 2 1 round-robin 0 2 1 …
I have noticed these messages in some of the linux systems . I was bit worried when I first saw them, how-ever later I came to know, these messages are harmless, “if” this system is connected to SAN ( ex:EMC Clariion series.) which is configured in “Active/Passive” mode and “if” the filesystem is working fine …