[ft2]

買了 "DIGI FILM" SD 咭
128 MB

用電腦 format 後發現只有 126,824,448 bytes (120 MB)
是否張 card 有問題, 可否向消委會投訴?

[talenthin]

正常,非常正常

[jammy_2002i]

不是吧.....o甘都當俾人呃!?
買80G harddisc唔足80G又話俾人呃,消委會咪好唔得閒~

[ft2]

少了 8 MB都叫正常 ?
咁少了幾多MB 才叫不正常?

我發覺d card capacity 越來越縮水,
上年我有張 MMC, 128MB, 用電腦 format 後發現只有 121MB.
而家縮下一d, 縮下一d, 一路唔出聲啞忍,
遲d買 128MB card, 得返 100MB, 咁到時你地又點睇?

[angelo]

因為呢D唔係十進製,睇多D書先投訴啦

[ft2]

朋友, 我都知不是十進制,

但電腦show 出黎話只得120 MB,
同係唔係十進制有乜關係先?
唔通電腦show 出黎話只得120 MB,就等於張 card 有 128MB??
請問閣下又睇左幾多書??

[woodstock.]

因為要做個file table都要D memory 架
~_~;

[ft2]

咁以前d card 為何經 format 後還有 124MB?
以前d card 唔使做個file table?

[ft2]

用幾 MB 做個file table?
唔係卦?

[sky13]

As I know, if the computer shows 125Mb = 128,000,000bytes.
It is because of Microsoft has different calcultion from the memory manufacturer .

Calculation from Microsoft or Computer: 1KB = 1024bytes
1MB = 1024KB
1GB = 1024MB

Form Memory maker or Manufacturer: 1KB = 1000bytes
1MB = 1000KB
1GB = 1000MB

If you divided the 128MB by 1.024 than you will get 125MB memory.
This will be shown on to your computer.

From the manufacturer, they always use 1M = 1000K that is why all the hard disc or memory cards has less memory size show on the computer.

[ladios_sopp]

ft2 :
個file table叫 FAT (File Allocation Table)
hard disk drive o既實際容量同physical memory o既實際容量係兩回事, 咪亂俾例子

[woodstock.]

FAT 16 同 FAT 32 個 table size 都唔同啦~~~~
128M 同 512M 個 table size又會唔同架喎~~~~
而且D card會因為讀取方法唔同所以pointer table 同個pointer長度會有不同所以有少少出入都不出奇

[ft2]

朋友, 唔係我俾例子 喎.
係Woodstock!


現在個 exact 數字係126,824,448 bytes , 以memory 生產商計法1MB = 1000KB
即係得 126.8 MB, (不是 128MB!!)


我以前張MMC card exact 數字都有128,352,256 bytes啦,以memory 生產商計法1MB = 1000KB
就有 128 MB 勒!!

好明顯係DIGI FILM 生產商呃人, 張卡少過 128,000,000 bytes !!

[ladios_sopp]

唉~~~~
第一, woodstock 已經指明 "而且D card會因為讀取方法唔同所以pointer table 同個pointer長度會有不同所以有少少出入都不出奇", 所以你用MMC同SD卡比, 已經無得比

第二, 我同你講緊 "實際容量", 唔係 "物理容量" !!!
"物理容量" 係 128MB 左右, 不過因為 FAT 的存在, 以及唔同廠商, 唔同 meida 的 block size 問題而影響實際可用容量會少過 128MB, 而且間間廠商都有出入

以下是 DC View 的測試
三款 1GB CF-type記憶卡實測: Transcend 45x, PQI 40x,Microdrive
http://www.dcview.com.tw/article/newreadarticle.asp?id=2241

講下人地寫乜野!??
"......這是因為大部分廠商對 1GB 的講法都是 1,000,000,000 Bytes，而不是 1024x1024x1024 Bytes。要是您斤斤計較容量的差異，採購前最好先問清楚容量的算法以免產生糾紛。"

又唔見人地話某某廠商呃人??

[edmondc]

I suggest ft2 going to complain,
1, go to police stations complain, because the 生產商呃人,
2, go to 消委會 complain, because 生產商呃人,
3. go to 教育統籌局 complain, because people don't know simple calculation,
4. go to 行政長官, because 行政長官 said, everything in HK, it's his matter,
5. go to 立法會 complain, because the 議員 may help you,
6...

I am serious, that prevent other people 比人呃.
and, we don't need to 睇多D書先投訴, because you just need to complain, complain and complain...