Auto Path ; PVLinks - How will I check ???

[f. halili]

What is AutoPath? and PV Links? A vendor is asking me if I use this in our machines. We have a VA7410 for our storage. How will I check which one is being used in the system?

Thanks,
f. halili

[Jerry Zhang · Accepted solution]

PVlink is part of LVM. If you have LVM on your system, then you are using PVlink. AutoPath is a separate product I think. Diffenrence between PVlink and AuthPath is PVlink can do standby/failover only (if one path failed, it will fail over to another path) and AutoPath can do not only standby/failover, it can do load balancing (IO traffic can go through mutiple paths - upto 8).

[Devender Khatana]

Hi,

To check for pvlinks you do this.

#vgdisplay -v /dev/vgxx

It should show you alternate link for the disks where pvlink exists. Can not figure out exact entry as do not have any disks with pvlinks in my systems.

HTH,
Devender

[DCE]

When you do the vgdisplay -v the output will look like this if you have PV links


--- Physical volumes ---
PV Name /dev/dsk/c59t0d1
PV Name /dev/dsk/c56t0d1 Alternate Link
PV Status available
Total PE 3667
Free PE 39
Autoswitch On



Autopath is an EMC product that does load balancing between multiple paths to a disk.

Since you have a VA7410, you should not have Autopath

dave

[Mauro Gatti]

DCE, EMC software is named PowerPath and not Autopath. Autopath I think is the same HP's product.

[DCE]

oops

sorry

Dave

[f. halili]

thanks