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中国DOS联盟论坛 The time now is 2026-08-13 01:38 |
47,811 topics / 349,897 posts / today 0 new / 48,256 members |
| DOS学习入门 & 精彩文章 （教学室） » How Many Files Can a 1.44MB Floppy Disk Store at Most? |
| Printable Version 797 / 7 |
| Floor1 willsort | Posted 2003-08-30 00:00 |
| 元老会员 Posts 1,512 Credits 4,432 | |
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To All：
I remember seeing articles discussing low-density disks (360K) before, but they left out the most important part: the calculation process? Can some expert give both the result and the calculation process? This requires a very deep understanding of the physical structure of floppy disks, the partition format of floppy disks, the file storage mechanisms of DOS and Windows, as well as the sector allocation mechanism. I advise DOS newbies not to discuss this thankless and difficult problem. |
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| Floor2 YASHIRO27 | Posted 2003-09-05 00:00 |
| 初级用户 Posts 7 Credits 138 | |
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You bastard! Even though I'm a newbie, I still want to reply!
Not trying to make a low-effort post, I just want to know the answer too, so I'll help you bump the thread! |
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| Floor3 lifeng5115 | Posted 2003-09-12 00:00 |
| 中级用户 Posts 39 Credits 283 | |
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9494
Everyone has the right to reply |
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| Floor4 cn_archer | Posted 2003-09-12 00:00 |
| 元老会员 Posts 991 Credits 2,903 From 福建省 | |
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Hehe, I really want to know too
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| Floor5 Wengier | Posted 2003-09-12 00:00 |
| 系统支持 Posts 10,521 Credits 27,736 | |
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Depends on the file size... If they're 0-byte files, then...
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| Floor6 llfz | Posted 2003-09-13 00:00 |
| 初级用户 Posts 35 Credits 263 | |
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For a 1.44MB floppy, theoretically it is 1474560 bytes, a total of 2880 sectors. According to the allocation convention of the FAT12 file system, each cluster is 2 sectors. Even the smallest file has to occupy one cluster number, and once that cluster is allocated, other files cannot use it. That means each file occupies at least two sectors, so theoretically a 1.44 floppy can store at most 1440 files.
It's been so long that I've forgotten: the DOS boot record reserved area, the FAT tables, and the FDT table also take up the first few sectors :） |
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| Floor7 llfz | Posted 2003-09-13 00:00 |
| 初级用户 Posts 35 Credits 263 | |
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I remember that on a 360K floppy, the data area started from track 0, head 1, sector 4. For a 1.44M floppy, it's more than that.
I'm getting old, and can't even tune the strings right anymore |
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| Floor8 defrag | Posted 2005-01-03 00:00 |
| 中级用户 Posts 570 Credits 456 | |
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7680 single-byte filenames
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