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#1 2008-06-29 17:32:15

TomSluyts
Member
Registered: 2008-06-26
Posts: 14

750 GB Samsung turns out to be a 686 GB samsung after formatting

Is this normal? I know that the 750 depends on formatting and filesystem etc, but to me this seems to be a big difference with regard to the stated volume of the drive.

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#2 2008-06-29 18:23:36

fonz
Member / Developer
From: Berlin
Registered: 2007-02-06
Posts: 1716
Website

Re: 750 GB Samsung turns out to be a 686 GB samsung after formatting

TomSluyts wrote:

Is this normal? I know that the 750 depends on formatting and filesystem etc, but to me this seems to be a big difference with regard to the stated volume of the drive.

750 * 1000 * 1000 * 1000 / 1024 / 1024 / 1024 = 698.49...

disk capacity is not measured in binary units, i.e. GB = 10^9 bytes.

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#3 2008-06-29 18:56:42

TomSluyts
Member
Registered: 2008-06-26
Posts: 14

Re: 750 GB Samsung turns out to be a 686 GB samsung after formatting

Thank you for this clarification.

I knew there was a difference, but I didn't know that it amounts to 10%.

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#4 2008-07-03 05:32:59

leftkidney
Member
Registered: 2007-12-26
Posts: 54

Re: 750 GB Samsung turns out to be a 686 GB samsung after formatting

you know I have a 500gb abd it shows up as 457 but the ones in my computer NTFS are 465

so why is it smaller on the NAS even though they are both the same size drive



and YES I know about the whole 1000 vs 1024 thingie - I know its not going to be 500 (stupid drive makers, all we want is it to say 1TB not 931GB so do what ever it takes and make it show up "correctly" - you know what I am talking about)

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#5 2008-07-03 17:25:31

TomSluyts
Member
Registered: 2008-06-26
Posts: 14

Re: 750 GB Samsung turns out to be a 686 GB samsung after formatting

Yes, i'm "missing" 12 GB when I compare the calculated value versus my 686GB that is showing. So that scales to your 8 GB on a 500 GB drive.

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#6 2008-07-03 20:05:33

mig
Member
From: Seattle, WA
Registered: 2006-12-21
Posts: 532

Re: 750 GB Samsung turns out to be a 686 GB samsung after formatting

leftkidney wrote:

I have a 500gb abd it shows up as 457 but the ones in my computer NTFS are 465
so why is it smaller on the NAS even though they are both the same size drive

You could be seeing a difference in size because the NTFS formated drives have only one partition,
and the DNS-323 drives have more that one partition.

If you have telnet access to your DNS-323, logon and type

fdisk -l /dev/sda

You will see the partitions information and size allocation for each partition.


DNS-323 • 2x Seagate Barracuda ES 7200.10 ST3250620NS 250GB SATAII (3.0Gb/s) 7200RPM 16MB • RAID1 • FW1.03 • ext2 
Fonz's v0.3 fun_plug http://www.inreto.de/dns323/fun-plug

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#7 2008-07-03 22:52:11

TomSluyts
Member
Registered: 2008-06-26
Posts: 14

Re: 750 GB Samsung turns out to be a 686 GB samsung after formatting

Disk /dev/sda: 750.1 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End                Blocks       Id System
/dev/sda1                1          66            530113+      82 Linux swap
/dev/sda2             131       91201    731527807+      83 Linux
/dev/sda4              67         130           514080         83 Linux

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