What I'm talking about is MCE's OPTIBAY HARD DRIVE. This upgrade, which varies in price from $229 to $379, depending on the drive size and speed (from 80GB to 160GB at 5400rpm, or 100GB at 7200rpm), involves removing your MacBook Pro's optical drive and in its place putting a second hard drive, in a sled that fits perfectly in the optical drive's former space. (The OptiBay is available for 15- and 17-inch MacBook Pros, as well as MacBooks and PowerBook G4s.) The result is a considerable increase in internal storage space, along with the minor side benefit of a laptop that's approximately one-fourth pound lighter--the hard drive and bracket together are lighter than the original optical drive. Here's an image of the OptiBay bracket and drive next to the stock SuperDrive from a 15-inch MacBook Pro:
On the other hand, the big disadvantage of this upgrade is that you lose your optical drive...sort of. Since there's a good chance you'll still need to be able to read and write CDs and DVDs, for an additional fee of $20 the OptiBay package for the 17-inch MacBook Pro and PowerBook G4 models will include a portable, bus-powered, external optical-drive enclosure--USB2.0 for the MacBook Pro or FireWire for the PowerBook G4--into which you put your laptop's optical drive after removal. The optical drive retains its abilities, so it can be used in the Finder, in iTunes, with Disk Utility, etc.
Unfortunately, the Mac Book and 15-inch MacBook Pro use a non-standard SuperDrive that doesn't fit in available drive enclosures. With these versions of the OptiBay kit, MCE will include a portable SuperDrive (FireWire/USB2.0, 8x, dual-layer) for an additional $100. Alternatively, with any of the packages you can get a desktop--non-portable--16x FireWire/USB2.0 SuperDrive for $120. My upgrade package included the portable SuperDrive, which worked as well as the original internal version--better, in fact, given that it was quite a bit faster. However, the need to buy a new optical drive does raise the price of the upgrade significantly for MacBook and 15-inch MacBook Pro owners.
INSTALLATION
The OptiBay upgrade I tested included a 160GB, 5400rpm drive. In fact, it was basically the same Hitachi Travelstar 5K160 laptop drive I installed in the previous upgrade article, linked above. The only difference is that this one was model HTS541616J9AT00 instead of HTS541616J9SA00, meaning the drive uses an ATA interface instead of SATA.
MCE offers three installation options. If you know what you're doing, you can elect to install the upgrade yourself; the necessary tools, as well as illustrated instructions, are included. However, if you don't feel qualified to do this yourself--especially, recommends MCE, if you have a 12-inch PowerBook G4--you can opt for one of two installation services. The Standard service, $49, requires you to send your computer to an MCE service center on your own dime. With Supreme service, $99, MCE will overnight you a protective shipping container and an overnight return shipping label. In both cases, after 1 to 3 days, MCE will ship the upgraded laptop back to you.
Having been inside my MacBook Pro before, I elected for the self-install route. The included instructions were clear, although the tools, while sufficient, were basic. If you're comfortable taking things apart, you'll likely find the process to be fairly straightforward. (For more on getting inside the 15-inch MacBook Pro, see the previous upgrade article.) Here's an image of the inside of my laptop just before removing the optical drive:
The OptiBay sled includes all the necessary circuitry and adapters to connect directly to the optical-drive connector on your laptop's logic board. Depending on which laptop you're upgrading, the sled also includes some combination of screws and padded-adhesive strips that make the sled fit snuggly and stably in the spot formerly occupied by the optical drive.
Once you've installed the OptiBay sled, reassembled the computer, and started up your laptop, the OptiBay hard drive will appear in Disk Utility as you would expect; you may need to format it after this first startup, since it's likely formatted as a Windows drive from the factory, but after that it will behave just like any other internal hard drive. Of course, you shouldn't try to stick a disc in the still-existent optical-drive slot; but even if you do, the sled itself will block you without damaging the disc.
PLENTY OF SPACE
What you do with the extra space provided by the OptiBay drive is up to you. Some people, especially those with lots of data or the need for plenty of scratch space, will simply use the drive as storage, just as if they'd connected an external FireWire or USB drive. (You could even use one drive for Mac OS X and the other for Boot Camp or for, say, the Developer Preview of Leopard.) However, there are two other options that are also quite useful.
First, if the new drive is the same size as your main drive--or if you partition it so that one of its partitions matches the main drive--the OptiBay drive makes for a great emergency backup volume. For much of my testing period, this is how I used the drive: I set up SuperDuper (
) to automatically clone my main drive once a day. This left me with a mirror-image, bootable backup of the main drive in case disaster struck. It was also useful for testing beta software and performing dangerous system tweaks; if anything went wrong, I could just reboot from the OptiBay drive and then clone back to the main drive to restore it to a good and healthy configuration. I made good use of this setup on more than one occasion. (I should note that you should also have another backup that you keep separate from your laptop; if your only backup is inside the same computer as the main drive, you run the risk--for example, if your laptop gets stolen or falls victim to a catastrophic event--of losing both at the same time.) MCE includes with the OptiBay a copy of BounceBack Express backup software, but I didn't test it. Alternatively, you could opt to set up the original and OptiBay drives, using Disk Utility, in a RAID. Yes, that's right, a laptop RAID! For example, you could have the OptiBay drive mirror the main drive, which means that any changes you make to the main drive are also written to the OptiBay drive; the second drive is always a mirror image of the first. (I tested this configuration, and it worked well; the downside is that battery life suffers a bit, as shown below.) You could also set up the two drives in a striped configuration, which would appear as a single, larger drive in the Finder and offer improved performance. (I didn't test this one, although I would imagine battery life would also suffer somewhat--not to mention that such a RAID configuration has a higher chance of failure than a single drive.)
PERFORMANCE AND BATTERY LIFE
Given that the hard drives used in the OptiBay are good performers, the biggest concern I had before installing the OptiBay drive was that battery life would be reduced significantly. According to MCE, this shouldn't be much of an issue:
[T]he MCE OptiBay Hard Drive falls within the heat and power dissipation specification for the optical drive it is replacing and also has built-in power management routines which allow it to use even less power. Depending on the spindle speed of the drive, battery life between charges with an OptiBay Hard Drive installed is affected by only 10 to 15%. The Mac OS will even spin the OptiBay Hard Drive down when not in use if instructed to do so in the Energy Saver preference panel within System Preferences.
Indeed, in my testing the OptiBay drive fared quite well in this respect. I ran the same basic Finder-copy and battery-life tests on the new OptiBay drive, while booted from that drive, that I performed on the 160GB SATA Hitachi replacement drive covered in the previous article. The fact that the OptiBay drive uses the ATA version of that drive makes these tests especially interesting, because both drives should use approximately the same amount of power and should provide similar performance. (SATA is theoretically faster than ATA, but the internal architecture of the laptop itself gives you similar maximum performance.) As with the previous tests, I erased both drives, formatted them, and then restored them to the exact same state to ensure that each would be as un-fragmented as a new drive (and comparable to each other). During testing, I unmounted the drive that wasn't in use in order to prevent it from affecting the tests.
I also performed the battery-life test while writing to both drives simultaneously--this gave me a rough idea of how much battery life you lose if you're using both drives continuously. Finally, I tested battery life when the two drives (main and OptiBay) were configured in a mirrored RAID.
RELATIVE DRIVE PERFORMANCE
| 0:54 | 2 hours, 25 minutes |
| 0:55 | 2 hours, 38 minutes |
| NA | 2 hours, 11 minutes |
| NA | 2 hours, 8 minutes |
Finder test times in minutes:seconds, rounded to the nearest second. Battery test times rounded to the nearest minute.
As you can see, the OptiBay's ATA drive was roughly equivalent in speed to its SATA, but otherwise identical, sibling. Oddly enough, battery life was actually longer, by 13 minutes, with the OptiBay drive. Just as interesting is the fact that writing data to both drives continuously reduced battery life by only around 20 minutes, on average, with a mirrored RAID reducing life by only an additional few minutes. I was surprised by these results, as they indicate that in normal use, having two internal hard drives has only a minor affect on overall battery life, unless you're frequently accessing both drives--and even then, the hit is less than I expected.
THAT'S (NOT SO) HOT
Another concern one might have about dual internal hard drives is that operating temperatures would increase. As with the previous drive upgrade, I also measured the MacBook Pro's internal temperatures, using
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