Automation

when i run this, I think limit is only 10 svmotions at one time? 

get-datastore -name (ds1) | get-vm | move-vm -datastore (get-datastore -name ds2) -runasync

how do I loops it so it continues after 10vms

The number of parallel svMotion is indeed limited, but the other ones should be queued and run in the end.
Do you see differently?

yes it does. I wanted to ad a progress bar to it

What kind of progress bar?
One for each of the background tasks, or one for all the tasks?

actually can i do something like this for multiple ds

Import-Csv "C:\scripts\dsmigration.csv" -UseCulture | % {

$old_ds = $_.old_ds

$new_ds = $_.new_ds

$VMs = get-vm -Datastore $old_ds

$VMs | move-vm -Datastore $new_ds -RunAsync

}

my csv file is

old_ds,new_ds

ds1,ds10

ds2,ds11

etc...

Yes, that should work

do i need a for loop for this to work on multiple ds? and can i add a progress bar per vm?

Your sample code has a loop after the Import-Csv.

yes. 

also trying to dismount all isos before proceeding

Import-Csv "C:\scripts\dsmigration.csv" -UseCulture | % {

$old_ds = $_.old_ds

$new_ds = $_.new_ds

$VMs = get-vm -Datastore $old_ds

# Check is any iso mounted on vms

foreach ($vm in $VMs) {

    if ((Get-VM $vm | Get-CDDrive).isopath -ne $null)

    $vm | get-cddrive | Set-CDDrive -NoMedia -Confirm:$False

}

else

#foreach ($vm in VMs){

#    movevm -datastore $new_ds -DiskStorageFormat Thin -RunAsync

$VMs | move-vm -Datastore $new_ds -DiskStorageFormat Thin -RunAsync

}

do i have to do it one at a time for the isomount dismount? 

You could do something like this