Switchover to CAM ATA?

John Baldwin jhb at freebsd.org
Fri Apr 23 13:50:57 UTC 2010

On Thursday 22 April 2010 11:31:37 am Alexander Motin wrote:
> If ataraid(4) should be reimplemented in GEOM, then how exactly? One
> more separate RAID infrastructure in GEOM (third?) looks excessive.
> Reuse gmirror, gstripe,... code would be nice, but will make them more
> complicated and could be not easy for RAID0+1 (due to common metadata)
> and RAID5 (due to lack of module in a base system).

Scott's view (which sounds good to me) is that GEOM should include a library 
of routines for working with common transforms such as RAID1, striping, etc.  
Each ATA RAID vendor format would then consist of a small GEOM module that 
used the library routines to manage all the I/O and the bulk of the module 
would be managing a specific metadata format.

John Baldwin

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