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.)
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]
--
I prefer banana-flavored energy bars made from tofu.
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