Re: [zfs-discuss] on alignment and verification

2010-03-28 Thread Daniel Carosone
On Sun, Mar 28, 2010 at 09:32:02PM -0700, Richard Elling wrote: > This is documented in the ZFS on disk format doc. Yep, I've been there in the meantime.. ;-) > Use prtvtoc or format to see the beginning of the slice relative to the > beginning of the partition. I dunno how you tell the start of

Re: [zfs-discuss] on alignment and verification

2010-03-28 Thread Daniel Carosone
On Mon, Mar 29, 2010 at 12:21:39PM +1100, Daniel Carosone wrote: > #1. Use xxd (or similar) to examine the contents of the raw disk > > This relies on knowing what to look for, and how that is aligned to > the start of the partition and to to metaslab addresses and offsets > that determine the wr

Re: [zfs-discuss] on alignment and verification

2010-03-28 Thread Richard Elling
On Mar 28, 2010, at 6:21 PM, Daniel Carosone wrote: > There's been some talk about alignment lately, both for flash and WD disks. > > What's missing, at least from my perspective, is a clear an > unambiguous test so users can verify that their zfs pools are aligned > correctly. This should be a

[zfs-discuss] on alignment and verification

2010-03-28 Thread Daniel Carosone
There's been some talk about alignment lately, both for flash and WD disks. What's missing, at least from my perspective, is a clear an unambiguous test so users can verify that their zfs pools are aligned correctly. This should be a test that sees through all the layers of BIOS and SMI/EFI and z