Re: [PATCH] ignore partition table on disks with AIX label

From: Valdis . Kletnieks
Date: Wed May 17 2006 - 16:02:38 EST

On Wed, 17 May 2006 15:44:13 EDT, Valdis.Kletnieks@xxxxxx said:

> As far as I can tell, the boot ROM snarfs up the first 512 byte block, and then
> looks for the 'IBMA' magic cookie, then looks at offset 0x1BE for a
> bog-standard 4-entry partition table, and a 0x55AA at offset 0x1FE.
> Additionally, there will be an *ASCII* '_LVM' in the first 4 bytes of physical
> 512-byte block 7, denoting the start of the LVM control record.
> I'd say if you find both the IBMA *and* _LVM cookies intact, you declare it
> an AIX volume.

Oh, one other check - the partition type(s) are set to 0x08 or 0x09 (AIX
boot and data partition flags). Other things use those 2 values as well,
but they won't have the _LVM cookie.

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