Seagate ST31500341AS 1.5TB

Freezing delay depends on sytem transfer load. If I start slow transfer out of idle mode (Waiting 15 min, then starting video viewing) first freeze (27sec) occurs after about 10sec (may be there is something cached), followed by a 15sec playback, followed by 27sec freeze... working like a clock for about 5 freezes. Thereafter it gets a little bit mixed but maximum playback is never more than 1-2 minutes followed by a freeze. Assuming the blocks are read round robin out of 5 drives (raidset is 6 drives including parity) there is a maximum time of about 5 minutes for a drive to fall asleep.

Starting the game out of full transfer load (starting media playback during a file copy, then aborting copy) you get the above 'mixed' situation. If I start file copy operation again, freezing disapears.

Unfortunately there is no 'spin up noise', but may I can't listen because of the other spinning drives or it's only a partitial spin down. Have a look at seagate homepage, these drives are supporting various energy saving modes like slow spinning....

May be these drives only believe they have to do wake up and perform the power up sequence, rotating well all time ...?