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disappearing block devices using EFI Partitioning

From: Igor Serebryany
Subject: disappearing block devices using EFI Partitioning
Date: Wed, 14 Oct 2009 07:25:26 -0500
User-agent: Mutt/1.5.17+20080114 (2008-01-14)


        I've been having a problem where sometimes, creating a new partition
        (parted mkpart) using GPT disk label causes the block device for the
        previously created partition to disappear.

        Here is an example: http://pastebin.com/f3acd536
        You can see on line 15 that after the previous parted command,
        /dev/sda3 which existed on line 12 is gone. There are no messages in
        dmesg and the partition itself is still on the disk.

        I am working on an automated partitioning too, and so I have seen
        this happen with a variety of partition layouts, disks and servers
        (although in slightly different ways each time). I have tried
        putting space between partitions, time between partition commands
        and other methods to no avail. A few hints on where to even begin
        debugging this would be great!


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