Windows 7 Forums


Reply
Thread Tools

HDD Limitations?

 
 
PrOgOoFa PrOgOoFa is offline
New Member
Join Date: May 2011
Posts: 2
Thanked: 0
 
      05-14-2011
Hey, just installed a new array of 8x2tb = 16tb in raid 0.

I have had an old array of 8x1.5tb = 12tb in raid 0 also, I am running win7 x64. When the arrays are up and running in the My Computer window the array is show and the size of the disk is show. The size of the disk is 10.9tb, My question is would the drive not recognise more than 10.9t or will it continue to work although the size of disk is "met", therefore asking me to clean the disk of unwanted items etc. If i right click the drive and go Properties it tells me the drive has 12,000,000,000,000 bytes as seen below in the attachment.

Any help is much appreciated. Thanks
Attached Thumbnails
HDD Limitations?-hdd.png  
 
Reply With Quote
 
 
 
 
yodap yodap is offline
No longer shovelling
yodap's Avatar
Join Date: Mar 2009
Location: NY, USA
Posts: 1,307
Thanked: 245
 
      05-14-2011
Welcome to the forum.

Everything seems normal to me therefore I don't understand your question.

12001612918784Bytes / 1024 = 11720325116KB / 1024 =11434463.528MB / 1024 = 11166.47GB / 1024 = 10.904TB
 
Reply With Quote
 
PrOgOoFa PrOgOoFa is offline
New Member
Join Date: May 2011
Posts: 2
Thanked: 0
 
      05-15-2011
Hi, thanks for your reply.

However, i have 8x 1.5tb drives toataling 12tb. However Windows only see's the 10.9.

The question is will the drive stop filling up after the 10.9 is reached?

I have 10.2tb used space at the moment. Being 12tb in total i should have 1.8tb left to fill. Will this 1.8 be unusable or will it continue to fill after the 10.9 has been reached?
 
Reply With Quote
 
yodap yodap is offline
No longer shovelling
yodap's Avatar
Join Date: Mar 2009
Location: NY, USA
Posts: 1,307
Thanked: 245
 
      05-15-2011
Quote:
The question is will the drive stop filling up after the 10.9 is reached?
Yes it will.

If you had checked the properties of any or all of the 1.5 TB drives individually, you would have seen that they spec out at 1390GB out of the box. Not 1500GB. This true of all 1.5 TB drives everywhere, not just yours. Call it false advertising if you like but it is what it is.
 
Reply With Quote
 
Digerati Digerati is offline
Established Member
Digerati's Avatar
Join Date: Apr 2010
Location: Nebraska, USA
Posts: 688
Thanked: 174
 
      05-15-2011
There are several reasons for the discrepancies. To start, disk makers and operating systems do not measure a "kilo" in the same way. Drive makers' marketing people want you to think you are getting the most space, so they use kilo like mathematicians do and say 100 x 10 = 1000 or 1 Kilo. But OS makers use kilos based on the binary system - since a transistor only has two states, on and off, or 1 and 0. So for software makers, it is 2^10 = 1024 = 1Kilo.

The problem is, if you simply count the number of physical storage locations (bits) on a disk's platters, then 1 Kilo does = 1000. But if you count the bytes used by the file (as seen by the OS) stored on the disk, then 1 Kilobyte = 1024 bytes. Clear as mud, right? But it does explain yodap's example.

I don't think it is "false" advertising, and since it has been this way since the beginning of magnetic disk storage (including floppy), I don't think there was any intentional deception when drives first came out. But I do think today's drive marketers take advantage of that confusion.

Also, whenever a disk is partitioned and formatted, space is used in the process, and the mapping of the partition and disk is stored in the master tables. Thus a freshly formatted disk with nothing stored on it will show the available capacity something short of the "raw" disk capacity.
 
Reply With Quote
 
Nibiru2012 Nibiru2012 is offline
Quick Scotty, beam me up!
Nibiru2012's Avatar
Join Date: Oct 2009
Location: Planet X
Posts: 4,851
Thanked: 1073
 
      05-15-2011
Thanks Digs! Excellent explanation of how HDD are advertised one way and recognized by the OS the other way.

I have known this since I had my first computer years ago, but a lot of users don't care to understand and/or ignore these subtle differences. Then they whine, complain, fall on the floor and turn blue, etc.
 
Reply With Quote
 
Digerati Digerati is offline
Established Member
Digerati's Avatar
Join Date: Apr 2010
Location: Nebraska, USA
Posts: 688
Thanked: 174
 
      05-15-2011
Quote:
Then they whine, complain, fall on the floor and turn blue, etc
After 5 kids, 7 grandkids, I'm adept at totally ignoring that - unless we're in public, then a quick smack on the backside provides something real to cry about, and the instant realization that, "Homey don't play dat!"
 
Reply With Quote
 
Nibiru2012 Nibiru2012 is offline
Quick Scotty, beam me up!
Nibiru2012's Avatar
Join Date: Oct 2009
Location: Planet X
Posts: 4,851
Thanked: 1073
 
      05-15-2011
I'm glad to see someone else believes as I do when it comes to the correct method of behavior modification. A friend of mine when I lived in Tulsa, OK called it the: "Jesus Come To Preach Meeting".
 
Reply With Quote
 
yodap yodap is offline
No longer shovelling
yodap's Avatar
Join Date: Mar 2009
Location: NY, USA
Posts: 1,307
Thanked: 245
 
      05-15-2011
Quote:
I don't think it is "false" advertising, and since it has been this way since the beginning of magnetic disk storage (including floppy)
For the record, I don't think it is either.

I (surprisingly) came to understand this years ago as well. Thanks for the excellent explanation.
 
Reply With Quote
 
clifford_cooley clifford_cooley is online now
(c_c)
clifford_cooley's Avatar
Join Date: Mar 2009
Location: Arkansas, USA
Posts: 4,509
Thanked: 930
 
      05-15-2011
They did at some point in time make a change and start labeling the binary abbreviation with a prefix "i"

1Kb = 1000 bytes
1Kib = 1024 bytes

1Mb = 1000000 bytes
1Mib = 1048576 bytes

I'm not sure how much they are enforcing the rules that were created though. If at anytime you do see the prefix "i", it does represent the binary equivalence of the abbreviation that follows.

Edit:
Kilobyte

Quote:
In December 1998, an international standards organization attempted to address these dual definitions of the conventional prefixes by proposing unique binary prefixes and prefix symbols to denote multiples of 1024, such as “kibibyte (KiB)”, which exclusively denotes 210 or 1024 bytes.[7] Had this proposal been widely and consistently adopted, it would have liberated the standard unit prefixes to unambiguously refer only to their strict decimal definitions wherein kilobyte would be understood to represent only 1000 bytes. However, in the over‑12 years that have since elapsed, the proposal has seen little adoption by the computer industry.

Last edited by clifford_cooley; 05-15-2011 at 05:47 PM..
 
Reply With Quote
 
 
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Windows 7 Versions Coco General Discussion 9 01-23-2010 04:06 PM
Win7 Starter limitations ? kitesurfa General Discussion 3 12-13-2009 01:45 PM


All times are GMT +1. The time now is 01:30 AM.
W7Forums is an independent website and is not affiliated with Microsoft Corporation.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33