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Easus Diskcopy
i just used Easus Diskcopy to copy from a 500Mb drive to a 2tb drive with
the hope of resizing the partitions afterwards to get more space. But on completion no partitioning tool will give me any more space because BIOS only recognizes the new drive as 500Mb - an exact image of the old one. what am i missing here? many thanks lol |
#2
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Easus Diskcopy
Op 25/09/2013 11:35, Laurence schreef:
i just used Easus Diskcopy to copy from a 500Mb drive to a 2tb drive with the hope of resizing the partitions afterwards to get more space. But on completion no partitioning tool will give me any more space because BIOS only recognizes the new drive as 500Mb - an exact image of the old one. what am i missing here? many thanks lol Regardless of how small or big that new partition is : the BIOS should always mention 2 TB! Even if there is no partition at all on the drive. Are you sure you are looking at the correct harddrive in the bios?? Disconnect the old harddrive so that only the new one is connected. |
#3
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Easus Diskcopy
Laurence wrote:
i just used Easus Diskcopy to copy from a 500Mb drive to a 2tb drive with the hope of resizing the partitions afterwards to get more space. But on completion no partitioning tool will give me any more space because BIOS only recognizes the new drive as 500Mb - an exact image of the old one. what am i missing here? many thanks lol http://forum.easeus.com/viewtopic.php?t=20010 "Sorry for the inconvenience" Yeah, that about sums it up. What were they thinking ? The information isn't exactly accurate. The MBR and HPA are not directly linked. HPA or Host Protected Area is a way to redefine the disk capacity. And you can even "snip the end off an working partition" by setting an HPA while the disk still has data on it. http://en.wikipedia.org/wiki/Host_Protected_Area "SET MAX ADDRESS" To test HPA, I did the operations from Linux. I did it from Linux, because unlike the other methods, I could continue to read documentation in a web browser at the same time. It involved some variation of this. hdparm --yes-i_know_what_i_am_doing -N p# /dev/sdX http://linux.die.net/man/8/hdparm Not all the command line options are documented, such as the "yes..." one. You only find out about it later. Examples here. http://tinyapps.org/docs/wipe_drives_hdparm.html Now the fun part: 1) Not all ports on the motherboard support HPA. To protect against malware setting an HPA, the Southbridge ports will block it at the BIOS level. On my motherboard, only the add-on Jmicron chip and attendent Jmicron BIOS code module, would not do anything to stop an HPA. I used the Jmicron for my experiments. Since the Jmicron in this case is IDE, I used an IDE to SATA adapter to set the HPA on my SATA disk. This is not an issue for you, because it looks like Easeus has already demonstrated it works on that port :-( If the BIOS had properly protected it, Easeus might have been stopped dead. I have motherboards where no port will do HPA. 2) The docs for hdparm say you can only deliver one HPA command to the drive per boot session. And that seemed to be the case here. My first attempt, I screwed up the command syntax, and no further attempt would work until I rebooted. Maybe this is implemented at the disk level but I can't be sure. I'd have to grab a copy of the ATA/ATAPI spec and see if that was the case. I was able to convert a 250GB drive to 6GB that way. And convert it back to 250GB. (Took about three reboots.) I don't think I checked the BIOS readout, to see if it was reading the SET_MAX_ADDRESS value or not. But it certainly worked that way in Windows (capacity detected as expected). Windows thought I had a 6GB disk, when the HPA "SET MAX ADDRESS" was set that way. If you copy verbatim a 500GB drive to a 2TB drive, the partitions would stay at 500GB, but the disk capacity would continue to report 2TB. It's when the available tools report the capacity of the drive as 500GB, you begin to suspect an HPA. And that's what I'm going on here, is that a real capacity change has occurred. And HPA is implicated. Have fun (hey, thanks Easeus! Easeus FTW /sarcasm), Paul |
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