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Author Topic: 4k partition alignment for SSDs  (Read 1199 times)

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Offline chris

Re: 4k partition alignment for SSDs
« on: March 12, 2017, 11:52:26 AM »
Quote from: LoadWB;823216
There are plenty of utilities out there to align x86 partitions along the 4k page boundaries in SSDs.

Does anything exist for the Amiga to assist in doing so?  Should we even consider this important?


This thread contains some info (OS4 thread, but not particularly OS4 specific): http://forum.hyperion-entertainment.biz/viewtopic.php?f=14&t=3573
It references this post which is probably about as good as you'll get it. I'm not sure this will actually align the blocks correctly though: http://www.amigans.net/modules/xforum/viewtopic.php?post_id=101939#forumpost101939

I have an SSD sitting on my desk but I think I'll wait for OS4 to support it properly before putting it in!
"Miracles we do at once, the impossible takes a little longer" - AJS on Hyperion
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Offline chris

Re: 4k partition alignment for SSDs
« Reply #1 on: March 12, 2017, 06:31:55 PM »
Quote from: LoadWB;823242
Thanks.  Helpful information in those.  I will likely have to redo this drive to match the settings for page boundaries, which I expected.

One question, though: numerous people point out that only FFS can handle block sizes over 512 bytes, yet documentation for SFS and PFS3 both indicate the ability to handle the 4k block sizes.


I was a bit puzzled about that myself, however it might be SFS2 only supports 512 byte blocks.  I'm pretty sure the old SFS supports others as I remember seeing a table showing what the maximum volume size was with different block sizes under SFS.

PFS isn't an included OS4 filesystem (and doesn't even have an OS4 native version AFAIK) so I doubt that is included in the statement, given that the discussion was OS4 focussed.
"Miracles we do at once, the impossible takes a little longer" - AJS on Hyperion
Avatar picture is Tabitha by Eric W Schwartz