Windows LUN is slow to format

Summary:

After applying an RDM device in ESX to a windows host the format process is slow to respond/finish or won’t complete at all.  This is a known issue with certain versions of Windows that can be corrected easily

Steps:

Before running format on the RDM device you need to fun the following command in powershell:

PS C:\Users\Administrator> fsutil behavior set DisableDeleteNotify 1

It should return:

NTFS DisableDeleteNotify = 1  (Enabled)

Format the device

After the format is complete re-enable DeleteNotify:

PS C:\Users\Administrator> fsutil behavior set DisableDeleteNotify 0

It should return:

NTFS DisableDeleteNotify = 0  (Disabled)