Except for meta data which seems to be written in small pieces, wouldn't having
a zfs record size being a multiple of 4k on a vdev that is 4k aligned work ok?
Or can the start of a zfs record that's 16kb for example start at any sector in
the vdev?
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This message posted from opensolaris.org
Actually, it is not my blog ;)
To answer your question: you first need to create a new vdev that is 4K aligned
unfortunately. I am not aware of any other means to accomplish what you seek.
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This message posted from opensolaris.org
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zfs-discuss
Hi Benji,
I did take a read of your blog before posting this. But it didn't
have the exact answer I was looking for. OS Version is Solaris 10 U9
x86. Your blog was highly informative, but didn't say if you can zfs
replace into a 4kb drive - it was more discussing the ability to
detect the WD
I have recently done this. See here for more details:
http://www.solarismen.de/archives/5-Solaris-and-the-new-4K-Sector-Disks-e.g.-WDxxEARS-Part-2.html)
What version are you running?
There's a compiled version of the modified zpool command that will create pools
that are 4K aligned somewhere,
Hi ZFS Discuss,
I have a 8x 1TB RAIDZ running on Samsung 1TB 5400rpm drives with 512b sectors.
I will be replacing all of these with 8x Western Digital 2TB drives
with support for 4K sectors. The replacement plan will be to swap out
each of the 8 drives until all are replaced and the new size
zfs replace will copy across on to the disk with the same old ashift=9,
whereas you want ashift=12 for 4KB drives. (size = 2^ashift)
You'd need to make a new pool (or add a vdev to an existing pool) with the
modified tools in order to get proper performance out of 4KB drives.
On 7 January 2011
