proper newfs options for SSD disk

[rozhuk.im at gmail.com]

Partition must be aligned to:

# gpart show
=>      34  62533229  ada0  GPT  (29G)
        34         6        - free -  (3.0k) - for align
        40       512     1  freebsd-boot  (256k) - size 4k aligned
       552  62532648     2  freebsd-ufs  (29G) - size 4k aligned
  62533200        63        - free -  (31k)



> -----Original Message-----
> From: owner-freebsd-hackers at freebsd.org [mailto:owner-freebsd-
> hackers at freebsd.org] On Behalf Of User Wojtek
> Sent: Saturday, May 19, 2012 5:11 AM
> To: freebsd-hackers at freebsd.org
> Subject: proper newfs options for SSD disk
> 
> what are proper settings
> 
> a) 4kB fragments so everything is 4k aligned? SSD drives itself reports
> as 512 byte blocks, but it is recomenned constantly on many places
> about 4K alignment for SSD.
> 
> b) small fragments (like 1KB) to reduce space usage, as there is no
> seeking so it will not slow down but save space on relatively small SSD
> 
> c) anything else?
> 
> 
> i use b) now.
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