AppleTalk file access-speed issue

I have DX 5.60.049 on a 3.4 GHz dual-processor HP DL380. DX is managing a 1.9 Tb external SATA raid with 2 shares. Both shares are windows and appletalk shares.
Before running the first archive and purge, windows and mac machines had a fast access time to the SATA shares, but afterwards the macs wait up to ten minutes to open directories. Windows machines are still fast.
Other mac/win shares on the same machine (but SCSI RAID) are not affected.

Questions: Is this normal? If it is normal, can it be "fixed"?

Thanks