Bristol Digest, Vol 610, Issue 3

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Today's Topics:

1. Re: SSD alignment (Amias Channer)
2. Re: SSD alignment (James Womack)
3. Re: LUG Meeting Tommorow 25/07/15 (Chris)


----------------------------------------------------------------------

Message: 1
Date: Sat, 25 Jul 2015 10:30:50 +0100
From: Amias Channer <me@amias.net>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] SSD alignment
Message-ID:
<CAMgU7XV=smNPnppAe8PxzwXb-vjiSAfnZ-fnJif09PP5cCYH9A@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

Hello James,

I see a lot of people talking about how to do it back in 2011 but
nothing since and nobody posting anything that proves it helps.
i would guess partitioning tools are doing this automatically , it
seems gparted does.

BTW check that samsung ssd has the latest firmware , there where some
trim bugs with those.

Cheers
Amias

On 24 July 2015 at 23:09, James Womack <james.c.womack@gmail.com> wrote:
> Hi,
>
> Does anyone have a feel for whether SSD alignment is something that
> needs careful attention with modern SSDs and a recent version of Linux?
>
> The last time I dealt with partitioning an SSD was several years ago,
> and I remember needing to be careful about aligning the partitions along
> 4KiB boundaries, and that aligning along erase block size boundaries was
> also important. I had to do this manually at the time, as the various
> tools had not been updated to support SSDs and the defaults would give
> incorrect alignment.
>
> Now I have a very new Samsung 850 EVO 500GB SSD which I want to
> partition, so I can install Ubuntu on it. I have read conflicting
> reports online about whether alignment is something you still need to
> bother with. The received wisdom seems to be that you should just align
> partitions to 1 MiB boundaries, and that you probably don't need to
> worry anyway since most modern partitioning tools do this anyway.
>
> As far as I can tell, the erase block size should not matter for
> partition alignment (I don't understand why it would, anyway, since for
> SSDs it is so much larger than the sector size).
>
> If anyone has any experience or thoughts on this, I would be interested
> to hear!
>
> Thanks,
> James
>
> --
> James Womack
> james.c.womack@gmail.com
> http://jcwomack.uk
>
>
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/bristol



------------------------------

Message: 2
Date: Sat, 25 Jul 2015 10:42:43 +0100
From: James Womack <james.c.womack@gmail.com>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] SSD alignment
Message-ID: <55B35A13.5050108@gmail.com>
Content-Type: text/plain; charset="windows-1252"

Thanks Amias, that was the impression I got too!

On 25/07/15 10:30, Amias Channer wrote:
> Hello James,
>
> I see a lot of people talking about how to do it back in 2011 but
> nothing since and nobody posting anything that proves it helps.
> i would guess partitioning tools are doing this automatically , it
> seems gparted does.
>
> BTW check that samsung ssd has the latest firmware , there where some
> trim bugs with those.
>
> Cheers
> Amias
>
> On 24 July 2015 at 23:09, James Womack <james.c.womack@gmail.com> wrote:
>> Hi,
>>
>> Does anyone have a feel for whether SSD alignment is something that
>> needs careful attention with modern SSDs and a recent version of Linux?
>>
>> The last time I dealt with partitioning an SSD was several years ago,
>> and I remember needing to be careful about aligning the partitions along
>> 4KiB boundaries, and that aligning along erase block size boundaries was
>> also important. I had to do this manually at the time, as the various
>> tools had not been updated to support SSDs and the defaults would give
>> incorrect alignment.
>>
>> Now I have a very new Samsung 850 EVO 500GB SSD which I want to
>> partition, so I can install Ubuntu on it. I have read conflicting
>> reports online about whether alignment is something you still need to
>> bother with. The received wisdom seems to be that you should just align
>> partitions to 1 MiB boundaries, and that you probably don't need to
>> worry anyway since most modern partitioning tools do this anyway.
>>
>> As far as I can tell, the erase block size should not matter for
>> partition alignment (I don't understand why it would, anyway, since for
>> SSDs it is so much larger than the sector size).
>>
>> If anyone has any experience or thoughts on this, I would be interested
>> to hear!
>>
>> Thanks,
>> James
>>
>> --
>> James Womack
>> james.c.womack@gmail.com
>> http://jcwomack.uk
>>
>>
>> _______________________________________________
>> Bristol mailing list
>> Bristol@mailman.lug.org.uk
>> https://mailman.lug.org.uk/mailman/listinfo/bristol
>
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/bristol
>

--
James Womack
james.c.womack@gmail.com
http://jcwomack.uk

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------------------------------

Message: 3
Date: Sat, 25 Jul 2015 12:12:00 +0100
From: Chris <cshorler@googlemail.com>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] LUG Meeting Tommorow 25/07/15
Message-ID: <1207D9DB-4989-4AE9-995F-83100EEEFF1F@googlemail.com>
Content-Type: text/plain; charset=UTF-8

On 24 July 2015 15:36:46 BST, Sebastian <sebsebseb_mageia@gmx.com> wrote:
>Hi
>
>It's another LUG meeting tomorrow at our usual Knights Templar Pub in
>Temple Quay near Temple Meads Train Station and Broadmead.
>
>Who is intending on being there? I'll probably be there about 2:30 or
>about 3pm.
>
>For anyone that does not know the meeting is very informal, with an
>opportunity to show or give away interesting Linux/tech related things
>even if wanting to, or just come along for a chat etc. I have another
>device that runs Linux :), that I can show tomorrow. We usually sit on
>the lower level at the back of the pub when entering it in the left
>hand side corner with the plugs, or near there instead if someone is
>already there. People turn up and leave when they decide to, with most
>attendees usually being there about 2pm, and leaving between 4pm and
>5:30pm.
>
>Regards
>
>Sebastian
>_______________________________________________
>Bristol mailing list
>Bristol@mailman.lug.org.uk
>https://mailman.lug.org.uk/mailman/listinfo/bristol

I should be there arriving 13.15-13.30

Chris




------------------------------

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End of Bristol Digest, Vol 610, Issue 3
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