So drive 0 partition 0 is actually the MBR of the first hard drive. In Windows, you can access the MBR (something EasyBCD does quite often) of each drive by setting the partition equal to zero. This may seem a bit off at first, but there’s a good reason for this. Drive 3 partition 1 is the first partition of the fourth drive, and so on and so forth. On Windows (and therefore, in EasyBCD as well… for the most part), drives start counting at 0, but partitions start from 1! So drive 0, partition 2 is the second partition of the first hard drive. Despite its weirdness, it’s quite easy once you get what’s going on: Microsoft may have picked a more unusual method of “counting” the drives and partitions, but at least they stuck to it the whole way through. Basically they’ve “merged” the two hdL# and sdL# lists into one, which does make it easier in a way… except of course that you don’t know whether it’s IDE or SATA drives that get listed first! Windows Ironically, in an attempt to make things a bit “easier,” certain Linux distributions (mostly just Ubuntu) now use sdL# notation for everything. So if you’re in the console and you want to tell Linux to access the 2nd partition of the 3rd SCSI drive, you would have to actually write /dev/sdc2. To make Linux understand what you want, you have to prefix the letter & number combination with /dev/. Linux doesn’t actually understand sda1 as referring to a drive – it’s just a combination of letters and numbers to it.
HOW TO CHANGE DISK NUMBER IN WINDOWS 7 PC
Even more confusing, at this point numbering starts from one again! So the third partition of the second IDE drive on your PC is hdb3 while the second partition of the first SCSI drive on your machine is sda2.
The “h” and “s” differentiate between IDE/ATA drives and SATA/SCSI drives respectively. hd(#,#) has already been discussed, and is primarily used before booting into Linux, in programs like Lilo and GRUB. In the list above “L” is a small-case letter, and “#” is a number. The different kind of “numbers” you will encounter in the Linux world: (hd0,3) fourth primary partition (usually an extended partition)īut when you’re within Linux dealing with the drives and devices, you’ll be shocked (and rightly so) to realize that they’ve done away with this straightforward numbering scheme and opted to use a combination of both letters and numbers… and categories too! Other syntaxes (hdx,y) syntax (hd0,0) first primary partition on first hard disk Pretty easy to follow, just (hdd,p) where the second ‘d’ is the drive number and the ‘p’ is the partition number. For example, (hd0,1) is the secondpartition of the first hard drive. When you are dealing with Linux hard drive and partition numbers, start counting both from the number zero. The Linux Camp did it logically… For the most part. The debate on the “right” way to do this is as old as time itself, and goes back to whether you consider “0” or “1” to be the “first number” in any index-based sequence. Drive Numbersĭifferent operating systems number their drives and partitions in different ways. Nevermind what Vista believes, it’s the operating system you are currently in that matters. So if you’re in XP and EasyBCD asks for the Vista drive, tell it D:, because that’s what XP thinks it is. So what’s the right way to use drive letters in EasyBCD? It’s quite simple, actually: Always use the drive letters that operating system you are currently booted into sees!ĮasyBCD “translates” the letters that current OS sees into numbers for the drive and partition. Windows Vista (sitting on the first partition of the second drive) sees:
E:\ for a common data partition shared between the two Windows XP (installed on the first partition of the first drive) sees:ģ. Right now it is all too likely that if you dual-boot you have different partition labels “facing” each operating system that don’t seem to add up. The problem with Windows’ method of labeling the physical volumes and their respective partitions is that if you dual-boot, most of the time overlaps will occur. Windows uses letters to represent physical drives on your machine, making it a lot easier to understand what’s happening where.
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