On Mon, Mar 14, 2011 at 04:00:57PM -0400, Mike Snitzer wrote: > On Mon, Mar 14 2011 at 3:13pm -0400, > Ron Johnson <ron.l.johnson@cox.net> wrote: > > > On 03/14/2011 12:17 PM, Mike Snitzer wrote: > > >On Mon, Mar 14 2011 at 12:47pm -0400, > > >Ron Johnson<ron.l.johnson@cox.net> wrote: > > > > > >>Hi, > > >> > > >>Is there any concern with mixing 4KB-sector drives with 512-byte > > >>sector drives in the same LV? > > > > > >Both LVM2 and Device Mapper have been updated to accommodate stacking > > >such a mix of drives. > > > > > >See this for a bit more detail: > > >http://people.redhat.com/msnitzer/docs/io-limits.txt > > > > > >Particularly, the "Stacking I/O Limits" section. > > > > > >The concern raised for partial (4k) writes to the 512b drive was > > >discussed a bit more here: http://lkml.org/lkml/2010/2/22/295 > > > > > > > Does this mean that util-linux v2.17.1 fdisk correctly handle AF > > disks? (Note that I will *not* be booting off an AF device.) ideally util-linux >= 2.17.2 (e.g. RHEL6) > > > > ftp://ftp.kernel.org/pub/linux/utils/util-linux/v2.17/v2.17.1-ReleaseNotes > > > > fdisk: > > - cleanup alignment, default to 1MiB offset [Karel Zak] > > - don't check alignment_offset against geometry [Karel Zak] > > - fallback for topology values [Karel Zak] > > - fix ALIGN_UP [Karel Zak] > > - fix check_alignment() [Karel Zak] > > - fix default first sector [Karel Zak] > > - use "optimal I/O size" in warnings [Karel Zak] > > - use 1MiB offset and grain always when possible [Karel Zak] > > - use more elegant way to count and check alignment [Karel Zak] > > - use optimal_io_size [Karel Zak] > > Given that changelog, yes. Yes, it works. Note that you have to disable (-c -u) DOS compatible mode. The mode is disabled by default in Fedora, but enabled in RHEL6. Some hints: http://karelzak.blogspot.com/2010/05/4096-byte-sector-hard-drives.html Karel -- Karel Zak <kzak@redhat.com> http://karelzak.blogspot.com _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
