Re: [zfs-discuss] Intel M-series SSD

2008-09-11 Thread Al Hopper
On Wed, Sep 10, 2008 at 1:46 PM, Bob Friesenhahn <[EMAIL PROTECTED]> wrote: > On Wed, 10 Sep 2008, Keith Bierman wrote: >>> ... >>> That is reasonable. It adds to product cost and size though. >>> Super-capacitors are not super-small. >>> >> True, but for enterprise class devices they are sufficie

Re: [zfs-discuss] Intel M-series SSD

2008-09-10 Thread Bob Friesenhahn
On Wed, 10 Sep 2008, Keith Bierman wrote: >> written at once, 512KB needs to be erased at once. This means that >> write performance to an empty device will seem initially pretty good, >> but then it will start to suffer as 512KB regions need to be erased to >> make space for more writes. > > Tha

Re: [zfs-discuss] Intel M-series SSD

2008-09-10 Thread Bob Friesenhahn
On Wed, 10 Sep 2008, Keith Bierman wrote: >> ... >> That is reasonable. It adds to product cost and size though. >> Super-capacitors are not super-small. >> > True, but for enterprise class devices they are sufficiently small. Laptops > will have a largish battery and won't need the caps ;> Des

Re: [zfs-discuss] Intel M-series SSD

2008-09-10 Thread Keith Bierman
On Sep 10, 2008, at 12:37 PM, Bob Friesenhahn wrote: > On Wed, 10 Sep 2008, Keith Bierman wrote: > >>> written at once, 512KB needs to be erased at once. This means that >>> write performance to an empty device will seem initially pretty >>> good, >>> but then it will start to suffer as 512KB

Re: [zfs-discuss] Intel M-series SSD

2008-09-10 Thread Richard Elling
Bob Friesenhahn wrote: > On Wed, 10 Sep 2008, Al Hopper wrote: > > >> Interesting flash technology overview and SSD review here: >> >> http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3403 >> and another review here: >> http://www.tomshardware.com/reviews/Intel-x25-m-SSD,2012.html >>

Re: [zfs-discuss] Intel M-series SSD

2008-09-10 Thread Keith Bierman
On Sep 10, 2008, at 11:40 AM, Bob Friesenhahn wrote: > > Write performance to SSDs is not all it is cracked up to be. Buried > in the AnandTech writeup, there is mention that while 4K can be > written at once, 512KB needs to be erased at once. This means that > write performance to an empty dev

Re: [zfs-discuss] Intel M-series SSD

2008-09-10 Thread Bob Friesenhahn
On Wed, 10 Sep 2008, Al Hopper wrote: > Interesting flash technology overview and SSD review here: > > http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3403 > and another review here: > http://www.tomshardware.com/reviews/Intel-x25-m-SSD,2012.html These seem like regurgitations of the sa

[zfs-discuss] Intel M-series SSD

2008-09-10 Thread Al Hopper
Interesting flash technology overview and SSD review here: http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3403 and another review here: http://www.tomshardware.com/reviews/Intel-x25-m-SSD,2012.html Regards, -- Al Hopper Logical Approach Inc,Plano,TX [EMAIL PROTECTED]