Is there a recommended solution for defragging disks on Windows guests in this type of environment? --- VSphere, ESXi, Version 5, using iSCSI SAN environment (both RDM and LUN to LUN utilized), Windows W2k3, W2k8 R2 guests
I have tested PerfectDisk and Diskeeper but this was using Local disk in a test environment.
I wish there was an update to Winternals Defrag mgr, but MS took over and did away with this cost effective util long ago.
Updates:
As of 6/2011 Windows guest VMs require disk defragmentation, regardless of brand of iSCSI SAN. Diskeeper and/or Perfectdisk. Windows guests still write in NTFS and will require defragmentation to organize the disk clusters and decrease I/O read/writes.
6/2012: Dell/Equallogic SANs - Do not use a Windows Guest Defragmentation utility if you use SAN Thin Provisioning unless you have the latest firmware (released in early 2012) for older model SANs, (PS6000, PS6500 and older).