Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread Dave Chinner
On Mon, Mar 16, 2015 at 08:12:16PM -0500, Alireza Haghdoost wrote: > On Mon, Mar 16, 2015 at 3:32 PM, Dave Chinner wrote: > > On Mon, Mar 16, 2015 at 11:28:53AM -0400, James Bottomley wrote: > >> Probably need to cc dm-devel here. However, I think we're all agreed > >> this is RAID across multipl

Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread Alireza Haghdoost
On Mon, Mar 16, 2015 at 3:32 PM, Dave Chinner wrote: > On Mon, Mar 16, 2015 at 11:28:53AM -0400, James Bottomley wrote: >> [cc to linux-scsi added since this seems relevant] >> On Mon, 2015-03-16 at 17:00 +1100, Dave Chinner wrote: >> > Hi Folks, >> > >> > As I told many people at Vault last week,

Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread Dave Chinner
On Mon, Mar 16, 2015 at 11:28:53AM -0400, James Bottomley wrote: > [cc to linux-scsi added since this seems relevant] > On Mon, 2015-03-16 at 17:00 +1100, Dave Chinner wrote: > > Hi Folks, > > > > As I told many people at Vault last week, I wrote a document > > outlining how we should modify the o

Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread Dave Chinner
On Mon, Mar 16, 2015 at 03:06:27PM -0400, James Bottomley wrote: > On Mon, 2015-03-16 at 12:23 -0600, Adrian Palmer wrote: > [...] > > >> == Data zones > > >> > > >> What we need is a mechanism for tracking the location of zones (i.e. > > >> start LBA), > > >> free space/write pointers within each

Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread James Bottomley
On Mon, 2015-03-16 at 12:23 -0600, Adrian Palmer wrote: [...] > >> == Data zones > >> > >> What we need is a mechanism for tracking the location of zones (i.e. start > >> LBA), > >> free space/write pointers within each zone, and some way of keeping track > >> of > >> that information across moun

Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread Adrian Palmer
Thanks for the document! I think we are off to a good start going in a common direction. We have quite a few details to iron out, but I feel that we are getting there by everyone simply expressing what's needed. My additions are in-line. Adrian Palmer Firmware Engineer II R&D Firmware Seagate,

Re: [ANNOUNCE] xfs: Supporting Host Aware SMR Drives

2015-03-16 Thread James Bottomley
[cc to linux-scsi added since this seems relevant] On Mon, 2015-03-16 at 17:00 +1100, Dave Chinner wrote: > Hi Folks, > > As I told many people at Vault last week, I wrote a document > outlining how we should modify the on-disk structures of XFS to > support host aware SMR drives on the (long) pla