RMA'd the last of my IBM 75GXP drives to Hitachi recently -- a 30G 2 platter model at least 2 years old. Bought in the good old days of 3 yr warranties. Somehow the electrical connection seemed intermittent. Took a while to get a drive back. Absentmindedly formatted/installed Win XP a couple days back... then realized today, this thing is REALLY quiet! The 75GXP had been my noisiest drive; all the rest are no 'cudas, so many that's what I did not notice right away.
Side by side with a 'cuda IV single platter: the IBM has just a touch of high frequency whine, while the 'cuda has almost none. WOW! Looked up the model # at Hitachi storage: IC35L030AVV207-0. Turns out to be a 180GXP 1-platter model with FDB bearing.
Very impressed with the low noise level. Haven't heard any chirping yet -- not really sat & used that PC for any length of time, but in a suspension, it makes as little noise as a 'cuda IV 1-platter. It may even have a bit less vibration.
Maybe time for review on it for recommended list?
I always felt that 180gxp didn't get the attention it needed based on my experience of it. Frankly, I thought the seek noise from cuda IV was louder than IBM. (subjective)
The only possible problem is the temperature of the device when suspended vs cuda IV. those 2-3c difference could make difference without some active cooling when "optimizing" for few hours on such massive beasts.
BTW, you probably haven't noticed that irregular sound coming out of the drive when using since you suspended it. Suspending it does wonders to those occasional hdd random lubrication process (I need to be within a feet to notice that sound without thinking)