Re: status of dm-crypt (alignment issues) on a SSD

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On Wed, Dec 01, 2010 at 03:51:24PM +0100, mike dentifrice wrote:
Any hint would be greatly appreciated (including pointers to up-to-date
HOWTOs which I may have missed). Also, if you guys know which specific
feature of linux 2.6.33 is required, it would allow me to check whether
it's been backported to Debian's 2.6.32 or not.
i dont know about debian and which software version has which feature,
but:

what you need on kernel side is having in sysfs
under /sys/block/<device>
queue/minimum_io_size
queue/optimal_io_size
queue/physical_block_size

on tool side,
for util-linux
ldd /sbin/fdisk | grep blkid
strings /lib/libblkid.so.1 | grep queue/

for lvm
strings /sbin/lvm |grep queue/

and so on.

--
Luca Berra -- bluca@xxxxxxxxxx
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