Ok, I thought I was creating aligned LUNs, now I am not so sure.
Currently running OnTap rel 8.0.2 7-Mode on an nSeries with a mix of FC and SATA disks. Anyone familiar with the subject of alignment knows about the various levels where misalignment can occur. From everything I have read, the lower levels of alignment are handled for you when creating aggregates, volumes, and LUNS, and the only place you need to be concerned is when you create the OS disks and partitions for your servers or VM's. Here is a snippet from the Best Practice guide:
N series systems automate the alignment of VMFS with N series iSCSI, FC and FCoE LUNs. This task is automated during the LUN provisioning phase of creating a datastore, when you select the LUN type VMware for the LUN.
Using the NetApp System Manager GUI to create LUNS and volumes I assumed that they were being created with the proper alignment. All I have to do is select 'vmware' or Windows' when creating the LUN. But, when I go into advanced mode and issue the command:
lun show -v
almost every one of the LUNS show as "misaligned". Here is what they look like:
Couldn't find any info on this command's output in 'advanced' mode so I am not sure what this is telling me. Is is safe to assume that this command is showing that the lower levels of the alignment are what is misaligned? If so, why are they misaligned?
Thanks,
D
