Date: Fri, 17 Jun 2011 06:33:20 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: Gavin Atkinson <gavin@freebsd.org> Cc: Alexander Motin <mav@freebsd.org>, FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: graid hit the tree Message-ID: <BANLkTi=pu9kOdjcN5qW8NxeLchVu12W8MA@mail.gmail.com> In-Reply-To: <1308316186.45314.21.camel@buffy.york.ac.uk> References: <4D8BBC29.6040500@FreeBSD.org> <1308316186.45314.21.camel@buffy.york.ac.uk>
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On Fri, Jun 17, 2011 at 6:09 AM, Gavin Atkinson <gavin@freebsd.org> wrote: > On Thu, 2011-03-24 at 23:48 +0200, Alexander Motin wrote: >> Hi. >> >> I've just committed the new GEOM-based software RAID driver (graid) into >> the HEAD [1]. Brave testers are welcome. :) >> >> 1. http://svn.freebsd.org/viewvc/base?view=3Drevision&revision=3D219974 > > One question. > > I'm very happy with the performance of the ahci subsystem, it is > measurably faster against the old ATA subsystem on modern hardware. =A0I > also really appreciate the compatibility shims to aid migration from the > adX style numbering to adaX. =A0On every system I've migrated so far, thi= s > mapping has worked flawlessly. > > Is there any chance that mapping from /dev/arX -> /dev/raid/r0 etc could > also be done? > > One thing that I have found is that it can be hard to determine from the > dmesg exactly where raid partitions will appear. =A0It would be wonderful > if devices similar to the "adX" devices could be made, for any graid > devices found. For this case, would it make more sense to advise folks to use devfs.conf ? Otherwise one would need to tell geom to talk ataraid a bit, which may or may not confuse some consumers. Thanks, -Garrett
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