Switchover to CAM ATA?

Alexander Motin mav at FreeBSD.org
Fri Apr 23 14:28:30 UTC 2010


John Baldwin wrote:
> 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.

Yes, I remember he proposed it somewhere. Idea is fine. Somebody with
sharp axe and lack of fear should just chop half of GEOM modules into
small pieces and collect them back. ;)

-- 
Alexander Motin


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