NDMP Copy Size Mismatch

[Mindfulrockwolf]

I am trying to run an NDMPcopy to backup 2 volumes from a 7-mode system to a CDOT SVM of the same name. We were using snapmirrors and realized we updated out of a version that allowed us to do so.

We ran:

node run -node nodeName

priv set advanced

ndmpcopy -d -sa ndmp:XXpasswordXX -st md5 -da ndmp:XXpasswordXX -dt md5 sourceIP:/vol/vol1 destinationIP:/svm/vol1

The problem is both destination volumes do not match the source volumes in size.

Vol1 is too small

Source: Vol1 = 30GB

Destination: Vol1=500MB

Vol2 is too big

Source: Vol2=2TB

Destination: Vol2=5.5TB

Why is there such a mismatch in both directions?

Additional info:

We did have some issues figuring out the ndmpcopy command on the first few runs. Each time it ran with an error it would still start and give the number of its run.
Ndmpcopy: starting copy [9]

This number increments each run even when we change the source and destination volumes between vol1 and vol2

[liu]

You require about 100 MB more space on the destination storage system than the amount of data to be restored.  

If there is not enough volume space or inodes available on the destination volume, the restore operation recovers as much data allowed by the destination volume space and inode availability.

Considerations before restoring data