SSD partition alignment confusion

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DrTeeth
Posts: 1289
Joined: Fri Aug 12, 2011 6:58 pm

Re: SSD partition alignment confusion

Post by DrTeeth »

Bob, KB=KiB AIUI.

DrT
Bob Coleman
Posts: 785
Joined: Fri Aug 12, 2011 5:58 pm

Re: SSD partition alignment confusion

Post by Bob Coleman »

DrTeeth wrote:Bob, KB=KiB AIUI.

DrT
See Data Storage Size Unit Conventions on page 5 of Image for Dos manual.
George
Posts: 38
Joined: Tue Aug 30, 2011 5:28 pm

Re: SSD partition alignment confusion

Post by George »

Thanks for the reference, Bob. I knew I saw the definitions somewhere.
Just couldn't put my finger on it.
George
---
There are 10 kinds of people in the world.
Those who understand binary and
Those who don't.

On 1/25/2012 4:06 PM, Bob Coleman wrote:
> [quote="DrTeeth":h6t1f497]Bob, KB=KiB AIUI.
>
> DrT[/quote:h6t1f497]
>
> See [b:h6t1f497]Data Storage Size Unit Conventions[/b:h6t1f497] on page 5 of Image for Dos manual.
>
>
Brian K
Posts: 2213
Joined: Fri Aug 12, 2011 1:11 am
Location: NSW, Australia

Re: SSD partition alignment confusion

Post by Brian K »

Bob Coleman wrote: See Data Storage Size Unit Conventions on page 5 of Image for Dos manual.
Unfortunately they don't explain the Align at 2KiB issue. TeraByte Support says 2KiB = 2048 but I'll bet most people look at it and think 2 kibibytes.
a1pcfixer
Posts: 183
Joined: Wed Aug 31, 2011 6:13 am

Re: SSD partition alignment confusion

Post by a1pcfixer »

Bob,

> See [b:h6t1f497]Data Storage Size Unit Conventions[/b:h6t1f497] on page 5 of Image for Dos manual.

"Because of the confusion that can result when these different data storage size unit conventions
are each referred to as “gigabytes”, the gibibyte (along with the kibibyte, mebibyte, etc.) was
established in 1998 by the International Electrotechnical Commission (IEC)."

Trouble is, the original conventions are soooo deeply embeded, adding the new definitions simply
adds confusion, not lessens it. Like calling the Sears Tower (original name) in Chicago, IL the
Willis Towers (new name). It'll always be the Sears Tower to many people, and many won't easily
accept the newer KiB instead of KB. KiB will get relegated to primarily programmers, and the average
PC user will stay with KB. Just human nature.
--

Jim L.
Using - Virtual Access(OLR)
http://www.virtual-access.org
6.3.0.5 Windows Vista Service Pack 2 build 6002

a1pcfixer
Posts: 183
Joined: Wed Aug 31, 2011 6:13 am

Re: SSD partition alignment confusion

Post by a1pcfixer »

Brian,

> I obviously don't understand the convention. But to many people it looks like 2 kibibytes.

Your not alone!

Think of it as Kibble & Bits.
--

Jim L.
Using - Virtual Access(OLR)
http://www.virtual-access.org
6.3.0.5 Windows Vista Service Pack 2 build 6002

fileant
Posts: 8
Joined: Tue Feb 14, 2012 4:53 am

Re: SSD partition alignment confusion

Post by fileant »

I think what Brian is getting at is it should be..
1MiB
or
LBA 2048
Which are both separate things as well.

If you want to say you are using its as 2"KiB LBA" then this means (pedantically) 2*1024*8 which is LBA 16384 confusing for newbies and vets. If your code does 2048 LBA regardless of sector size you should label it LBA 2048. If it does 1MiB regarding of sector size, label it 1MiB. I understand Byte can be any number and you are using 1, but that is more pedantic as the de facto standard is 8. (unless I am wrong somewhere... I got very confused reading it all, lol.)

EDIT: I get you now... you are saying byte=sector.... still confusing as no one thinks of byte as 512 or 4096

What is the correct way to ensure a second JFS partition is aligned on a WD drive? Tick what boxes and slide? The DVR needs to create the partitions.
I have 2 partitions one is 128MB second almost fills and there is 2MB free on the end. First is on LBA 63. I want to make the second partition aligned, don't care about the first.
Milmoor
Posts: 12
Joined: Sun Mar 11, 2012 10:29 am

KB vs KiB

Post by Milmoor »

1000 and 1024 are really close percentage wise, so intermixing those wasn't an issue in the good old days with 640 KB memory. But when dealing with Terabyte drives, 1024*1024*1024 is a lot more than 1000*1000*1000 (7.3%). So this started to confuse people. Since kilo means 1000 in all other measuring units, the kibi was introduced: http://en.wikipedia.org/wiki/Kilobyte. It takes some getting used to, but it works quite well.
TeraByte Support
Posts: 3596
Joined: Thu May 05, 2011 10:37 pm

Re: KB vs KiB

Post by TeraByte Support »

That's why we've been using KiB for years.

"Milmoor" wrote in message news:1675@public.bootitbm...

1000 and 1024 are really close percentage wise, so intermixing those wasn't
an issue in the good old days with 640 KB memory. But when dealing with
Terabyte drives, 1024*1024*1024 is a lot more than 1000*1000*1000 (7.3%). So
this started to confuse people. Since kilo means 1000 in all other measuring
units, the kibi was introduced:

[
http://en.wikipedia.org/wiki/Kilobyte
](http://en.wikipedia.org/wiki/Kilobyte)

.. It takes some getting used to, but it works quite well.

DrTeeth
Posts: 1289
Joined: Fri Aug 12, 2011 6:58 pm

Re: KB vs KiB

Post by DrTeeth »

On Sun, 11 Mar 2012 09:14:47 PDT, just as I was about to take a herb,
"TeraByte Support" disturbed my
reverie and wrote:

>That's why we've been using KiB for years.

The trouble is that I imagine most people, as I did, assume that it
is the same as KB and that some international body has been messing
with standards. It is useful to know that there IS actually a
difference in value.

Happens all the time and is rife in part of my field - many name
changes and spelling changes. I still call it 'lignocaine' and not the
modern (USA) name of 'lidocaine' .
--

Cheers

DrT
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