I bought a Western Digital Scorpio Black WD3200BEKT 320GB 7200 RPM HD that I have yet to install in my MacBook 1.1. I found the following review on the Newegg site. Accurate or not?
"It should be noted that this drive doesn't work very well with MacBooks and/or Macs in general. I didn't do much research on this product before purchasing it, my mistake. It turns out that some Western Digital Scorpio Black drives have a problem with an OS X battery saving feature. This means that the drive will spin up more often than not, causing load/unload cycles to spike. This causes something like a "clunk" sound every 10-20 seconds. These excessive load/unload cycles can cause premature failure of the drive and very noticeable noise. I also noticed, aside from this noise every 10-20 seconds, the drive was just generally loud. This could just be because it's 7200RPM and I had a 5400rpm drive before and I wasn't used to the faster drive, but it was the equivalent of my MacBooks fans on at 70% (4000rpm). Other than the noise issue and the possible early failure rate, this drive was great. It was noticeably faster than the 5400rpm drive."
"It should be noted that this drive doesn't work very well with MacBooks and/or Macs in general. I didn't do much research on this product before purchasing it, my mistake. It turns out that some Western Digital Scorpio Black drives have a problem with an OS X battery saving feature. This means that the drive will spin up more often than not, causing load/unload cycles to spike. This causes something like a "clunk" sound every 10-20 seconds. These excessive load/unload cycles can cause premature failure of the drive and very noticeable noise. I also noticed, aside from this noise every 10-20 seconds, the drive was just generally loud. This could just be because it's 7200RPM and I had a 5400rpm drive before and I wasn't used to the faster drive, but it was the equivalent of my MacBooks fans on at 70% (4000rpm). Other than the noise issue and the possible early failure rate, this drive was great. It was noticeably faster than the 5400rpm drive."