Re: Status of support for 4KB disk sectors

2011-07-25 Thread Gary Palmer
On Tue, Jul 19, 2011 at 08:48:54PM -0700, Chuck Swiger wrote: On Jul 19, 2011, at 8:14 PM, Jeremy Chadwick wrote: On Wed, Jul 20, 2011 at 02:39:28AM -0700, per...@pluto.rain.com wrote: IIRC, Plextor (and maybe some others) had a switch to select 512 or 2048 as the default transfer size,

Re: Status of support for 4KB disk sectors

2011-07-21 Thread Alexander Leidinger
Quoting Kevin Oberman kob6...@gmail.com (from Tue, 19 Jul 2011 14:33:27 -0700): On Tue, Jul 19, 2011 at 1:41 PM, Alexander Leidinger alexan...@leidinger.net wrote: On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy Chadwick free...@jdc.parodius.com wrote: But the currently known method is to use

Re: Status of support for 4KB disk sectors

2011-07-21 Thread Kevin Oberman
On Thu, Jul 21, 2011 at 6:02 AM, Alexander Leidinger alexan...@leidinger.net wrote: Quoting Kevin Oberman kob6...@gmail.com (from Tue, 19 Jul 2011 14:33:27 -0700): On Tue, Jul 19, 2011 at 1:41 PM, Alexander Leidinger alexan...@leidinger.net wrote: On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy

Re: Status of support for 4KB disk sectors

2011-07-20 Thread perryh
Jeremy Chadwick free...@jdc.parodius.com wrote: On Wed, Jul 20, 2011 at 02:39:28AM -0700, per...@pluto.rain.com wrote: IIRC, Plextor (and maybe some others) had a switch to select 512 or 2048 as the default transfer size, precisely so that they could be used as boot devices with systems

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Kevin Oberman
On Mon, Jul 18, 2011 at 4:41 PM, Jeremy Chadwick free...@jdc.parodius.com wrote: On Mon, Jul 18, 2011 at 03:50:15PM -0700, Kevin Oberman wrote: I just want to check on the status of 4K sector support in FreeBSD.  I read a long thread on the topic from a while back and it looks like I might hit

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Chuck Swiger
On Jul 18, 2011, at 11:04 PM, Kevin Oberman wrote: I just wish FreeBSD had some decent documentation on such a fundamental operation. Fortunately there are some pretty good articles folks have written, but they did leave me with several questions. Is there something in FreeBSD which is

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Ivan Voras
On 19.7.2011. 19:54, Chuck Swiger wrote: On Jul 18, 2011, at 11:04 PM, Kevin Oberman wrote: I just wish FreeBSD had some decent documentation on such a fundamental operation. Fortunately there are some pretty good articles folks have written, but they did leave me with several questions. Is

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Chuck Swiger
On Jul 19, 2011, at 12:29 PM, Ivan Voras wrote: Is there something in FreeBSD which is preventing you from using the drive's native DEV_BSIZE of 4096 bytes, or is it that the drive claims to have a physical block size of 512 bytes when it is really 4k? Nope, only that. :-) It's nice to

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Alexander Leidinger
On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy Chadwick free...@jdc.parodius.com wrote: But the currently known method is to use gnop(8). Here's an example: http://www.leidinger.net/blog/2011/05/03/another-root-on-zfs-howto-optimized-for-4k-sector-drives/ Now, that's for ZFS, but I'm under

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Peter Jeremy
On 2011-Jul-19 10:54:38 -0700, Chuck Swiger cswi...@mac.com wrote: Unix operating systems like SunOS 3 and NEXTSTEP would happily run with a DEV_BSIZE of 1024 or larger-- they'd boot fine off of optical media using 2048-byte sectors, Actually, Sun used customised CD-ROM drives that faked

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Kevin Oberman
On Tue, Jul 19, 2011 at 1:41 PM, Alexander Leidinger alexan...@leidinger.net wrote: On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy Chadwick free...@jdc.parodius.com wrote: But the currently known method is to use gnop(8).  Here's an example:

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Jeremy Chadwick
On Tue, Jul 19, 2011 at 02:33:27PM -0700, Kevin Oberman wrote: On Tue, Jul 19, 2011 at 1:41 PM, Alexander Leidinger alexan...@leidinger.net wrote: On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy Chadwick free...@jdc.parodius.com wrote: But the currently known method is to use gnop(8). ?Here's

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Chuck Swiger
On Jul 19, 2011, at 2:10 PM, Peter Jeremy wrote: On 2011-Jul-19 10:54:38 -0700, Chuck Swiger cswi...@mac.com wrote: Unix operating systems like SunOS 3 and NEXTSTEP would happily run with a DEV_BSIZE of 1024 or larger-- they'd boot fine off of optical media using 2048-byte sectors,

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Kevin Oberman
On Tue, Jul 19, 2011 at 2:49 PM, Jeremy Chadwick free...@jdc.parodius.com wrote: On Tue, Jul 19, 2011 at 02:33:27PM -0700, Kevin Oberman wrote: On Tue, Jul 19, 2011 at 1:41 PM, Alexander Leidinger alexan...@leidinger.net wrote: On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy Chadwick

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Warren Block
On Tue, 19 Jul 2011, Chuck Swiger wrote: Is there something in FreeBSD which is preventing you from using the drive's native DEV_BSIZE of 4096 bytes, or is it that the drive claims to have a physical block size of 512 bytes when it is really 4k? Are there any 4K-block drives that are honest

Re: Status of support for 4KB disk sectors

2011-07-19 Thread perryh
Chuck Swiger cswi...@mac.com wrote: On Jul 19, 2011, at 2:10 PM, Peter Jeremy wrote: On 2011-Jul-19 10:54:38 -0700, Chuck Swiger cswi...@mac.com wrote: Unix operating systems like SunOS 3 and NEXTSTEP would happily run with a DEV_BSIZE of 1024 or larger-- they'd boot fine off of optical

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Jeremy Chadwick
On Wed, Jul 20, 2011 at 02:39:28AM -0700, per...@pluto.rain.com wrote: Chuck Swiger cswi...@mac.com wrote: On Jul 19, 2011, at 2:10 PM, Peter Jeremy wrote: On 2011-Jul-19 10:54:38 -0700, Chuck Swiger cswi...@mac.com wrote: Unix operating systems like SunOS 3 and NEXTSTEP would happily

Re: Status of support for 4KB disk sectors

2011-07-19 Thread Chuck Swiger
On Jul 19, 2011, at 8:14 PM, Jeremy Chadwick wrote: On Wed, Jul 20, 2011 at 02:39:28AM -0700, per...@pluto.rain.com wrote: IIRC, Plextor (and maybe some others) had a switch to select 512 or 2048 as the default transfer size, precisely so that they could be used as boot devices with systems

Status of support for 4KB disk sectors

2011-07-18 Thread Kevin Oberman
I just want to check on the status of 4K sector support in FreeBSD. I read a long thread on the topic from a while back and it looks like I might hit some issues if I'm not REALLY careful. Since I will be keeping the existing Windows installation, I need to be sure that I can set up the disk

Re: Status of support for 4KB disk sectors

2011-07-18 Thread Jeremy Chadwick
On Mon, Jul 18, 2011 at 03:50:15PM -0700, Kevin Oberman wrote: I just want to check on the status of 4K sector support in FreeBSD. I read a long thread on the topic from a while back and it looks like I might hit some issues if I'm not REALLY careful. Since I will be keeping the existing

Re: Status of support for 4KB disk sectors

2011-07-18 Thread Glen Barber
On 7/18/11 7:41 PM, Jeremy Chadwick wrote: On Mon, Jul 18, 2011 at 03:50:15PM -0700, Kevin Oberman wrote: I just want to check on the status of 4K sector support in FreeBSD. I read a long thread on the topic from a while back and it looks like I might hit some issues if I'm not REALLY

Re: Status of support for 4KB disk sectors

2011-07-18 Thread Jeremy Chadwick
On Mon, Jul 18, 2011 at 11:38:00PM -0400, Glen Barber wrote: On 7/18/11 7:41 PM, Jeremy Chadwick wrote: On Mon, Jul 18, 2011 at 03:50:15PM -0700, Kevin Oberman wrote: I just want to check on the status of 4K sector support in FreeBSD. I read a long thread on the topic from a while back and