Although consumers shouldn’t expect good support from motherboard makers until the first half of next year. I’m expecting to see the first round of motherboards with official 3TB HDD support in the coming weeks. Most PC motherboards however do not have EFI support, and those that do may have bugs associated with the implementation. Intel based Macs don’t use a BIOS and instead have an EFI which allows them to boot to GPT drives. GPT is however supported by systems that implement the successor to the BIOS: Intel’s Extensible Firmware Interface (EFI). Your BIOS does not support booting to GPT drives. I just mentioned that your PC’s BIOS looks at LBA 0 for the MBR. In order to boot to a GPT partition, you need hardware support. You’ll note that I said data and not boot drives. Below we have some screenshots of creating a GPT drive in Windows and OS X:
Wd my book 3tb driver mac os x#
GPT drives are supported as data drives in all 圆4 versions of Windows as well as Mac OS X and Linux. With 64-bit LBAs the largest 512-byte sector drive we can address is 9.4ZB (Zettabytes - 10^21 or 2^70 bytes depending on if you’re counting in base 10 or 2). In use on all Itanium and Intel based Macs (among other systems) is GPT (GUID Partition Table), and a feature of GPT is 64-bit LBA support. Either way, with a 3TB drive there’s no way we’re getting a single 3TB partition using MBR. Hard drive manufacturers define 1TB as 1 trillion bytes. Each LBA on a hard drive corresponds to a 512-byte sector value (even on 4K advance format drives, they still appear as 512-byte sector drives to the OS), so the largest partition you can have in a MBR partitioned drive is 4294967296 * 512-bytes or 2,199,023,255,552 bytes. Now LBAs under MBR partitions are addressed using 32-bit values, the maximum of which is 2^32 or 4294967296.
Wd my book 3tb driver how to#
LBA 0 contains the Master Boot Record (MBR) and your BIOS looks at the contents of LBA 0 to determine how to boot.
Master Boot Record partitioning is by far the most common on PCs today. The number of LBAs you can address is a function of your hardware and the style of partition you’ve applied to your drive. You start at LBA 0 and you go all the way up to the last address in your device.
Storage is addressed linearly, regardless of how the hardware itself is accessed. Pretty much all HDDs (and SSDs) are addressed using a scheme called Logical Block Addressing (LBA). I addressed this in my 3TB Seagate review back in August, so much of this is a rehash from the review back then with some new information toward the end of the page.
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