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-hack...@freebsd.org [mailto:owner-freebsd-
> hack...@freebsd.org] On Behalf Of User Wojtek
> Sent: Saturday, May 19, 2012 5:11 AM
> To: freebsd-hackers@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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