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Veazer Veazer is offline
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Default Best way to create multiple write-block aligned partitions on runcore for multiboot? - 07-31-2010, 07:20 PM

I'm familiar with using DISKPART to create aligned partitions, but I haven't used it for creating multiple partitions on the same physical drive. I'm intending to create a triple boot XP-OSX-LinuxMint setup and I'd like to be sure that all partitions are correctly aligned to the ssd write blocks, including the swap partitions. I've also heard that vista and Win7 do this automatically now when they detect ssd media, can i just create the partitions using diskmgmt.msc on a win7 machine using the usb attachment and achieve this?

Or should i stick to DISKPART and make sure the starting offsets are correct (Ie mulitple of 4096).

Any recommendations or pointers to other threads are appreciated.
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grassle grassle is offline
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Default 08-01-2010, 05:35 PM

From memory, so there may be errors in the following:
I used a method where you create a temporary dummy partition (using diskpart, with units set to sectors) from sector 63 to 127. Any tool used after that will start the next partition at sector 128, ie, aligned.
Gparted which conveniently measures in MiB then sized any subsequent partition to end with and erase block end.
(Delete the dummy partition before you try to add a fourth partition on an MBR setup.)
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Veazer Veazer is offline
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Default 08-03-2010, 06:18 PM

Thanks, I'll give that a try. I had no idea that the correct alignment would be inherited by subsequent partitions. Not sure why there's a need for a dummy partition though, couldn't you just create your first partition you intend to use?

Anyway, thanks for the tip!
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grassle grassle is offline
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Default 08-04-2010, 03:17 PM

If the tool you use supports the exact setting you can start right with the for-use partitions, of course.
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