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тАО08-26-2011 11:39 AM
тАО08-26-2011 11:39 AM
MSA2312i reports unformatted 1TB disk size as 931.5GiB
I have two identical MSA2312i with 1TB SATA disks. I have setup and configured one with no problem. I went to start the second MSA and all of the disks are showing a size of 931.5GiB. Why would the same identical disks in one MSA show a true size and the second MSA shows a smaller disk size? I have never seen disk size reported in "GiB". Can i get some help, thanks.
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тАО08-28-2011 10:06 PM
тАО08-28-2011 10:06 PM
Re: MSA2312i reports unformatted 1TB disk size as 931.5GiB
I thought GiB is the new thing that's meant to be better than the rest but it confuses me.
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тАО08-28-2011 10:51 PM
тАО08-28-2011 10:51 PM
Re: MSA2312i reports unformatted 1TB disk size as 931.5GiB
One of these units may be in the inflated marketing speak and the other other in nerd speak.
I.e. marketing speak is in units of 1000s. Nerd speak is in units of K, 1024.
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тАО08-28-2011 11:01 PM
тАО08-28-2011 11:01 PM
Re: MSA2312i reports unformatted 1TB disk size as 931.5GiB
The GiB is 'GibiBytes' which is 2^30 Bytes or 1024 MebiBytes which is 2^20 Bytes.
While one MegaByte could be one million Bytes (10^6) or 2^20 Bytes (with the 1024 Bytes per kiloBytes).
http://xkcd.com/394/
and
http://en.wikipedia.org/wiki/Gibibyte
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тАО08-30-2011 07:11 AM
тАО08-30-2011 07:11 AM
Re: MSA2312i reports unformatted 1TB disk size as 931.5GiB
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тАО08-31-2011 01:43 AM
тАО08-31-2011 01:43 AM
Re: MSA2312i reports unformatted 1TB disk size as 931.5GiB
From the MSA Reference Guide:
About size representations
[...]
Operating systems usually show volume size in base 2. Disk drives usually show size in base 10. Memory
size is always shown in base 2. In SMU, the base for entry and display of storage-space sizes can be set
per user or per session. When entering storage-spaces sizes only, either base-2 or base-10 units can be
specified.
I don't have a box here and am too lazy to check the documentation, sorry, so I can't tell where to change this.