How To Calculate Disk Space??

[Cap2010]

Hi,

Want to know
How to calculate Disk Space is
bytes per sector/per cluster of HDD/FDD

- Physical/Logical

for FDD
1.44 Mb (The working of getting 1.44 mb)

for HDD
10 or 20GB (The calculation of Getting 20 GB)

Looking out for workings for calucating bytes per sector then per cluster which totals out 20 gb for HDD or 1.44 mb for FDD.

Thanks,

Captain

 

[osuman]

If I remember correctly:
There's 512 bytes per sector. So, total space on a hard disk is 512*cylinders*sectors*heads. The size of the cluster depends on how the drive is partitioned. If you have 32KB clusters, then you are using 64 sectors per cluster. 32 is most common when using FAT32, as Windows98/ME does with large HD's.

 

[Cap2010]

Hi,
Thanks, for the answer.

1) Need explanation for the below working.
and
2) Question is for Calculating the TPI?
3) can I increase the TPI of 20 MB Hdd or 1.44 Mb Floppy
if so, how to?
4) Is there a strict parameter or standard parameter, where can I get the updates on it.



48 TPI or 96 TPI of a Floppy.

48 TPI
--------
40 Tracks
9 sectors/track (360 kb/40tracks)

40*9 is 360KB double sided

96 TPI
------
80 Tracks
15 sectors/track (1200 kb/80tracks)

80 * 15 is 1200 Kb

1 sector = 512 bytes i.e. 0.5 Kb / sector (am i right?)


Thanks,

Cap2010

 

[Cap2010]

Hi,

Want to Calculate TPI?
Want to use 100 TPI in 1.44 Mb Floppy how to.

Thanks,

Captain

 

[edfair]

Rebuild the drive with a different lead screw, which you will have to turn on a lathe.
Why?
Tandon made a 100 TPI drive a long time ago.
On your 20mb HD. You could increase the TPI on some by changing the stepper motor, on some by redoing the servo track. But there would be problems with the heads overlapping adjacent cylinders and potential data loss.
Once again , why? Ed Fair
efair@atlnet.com

Any advice I give is my best judgement based on my interpretation of the facts you supply.

Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.

 

[Cap2010]

hi,
Reprhasing the question. In Windows NT the Format command for floppy is

format a:/
and has the option like

format a:/ /F:
format a:/ /T: /N:
Format a:/ /1 /4 /8

Description Option
/F: for size 360,720,1.2,1.44,2.88
/T: for tracks per disk side
/N: for number of sectors per track
/1 for formatting single side of a FDD
/4 for formatting 5.25" 360K FDD on a High Density Drive
/8 for formatting 8 sectors per track

Query 1
I have 1.44 drive and want to use the above options how To for size 360, 720, 1.2,1.44?

Query 2
The above methods on Linux, How to.?

Query 3
How to use the above option on HDD ?

Query 4
A site giving good explanation on the same ?

Regards,


Cap2010

 

[Cap2010]

hi,

I tried on 96 tpi on 1.2 mb fdd
i.e. 80 x 1.2 = 96 tpi
80 is tracks
1.2 mb is the fdd size

when I do for 48 tpi for 360 FDD
i.e. 40 x 360 = 14.44 and not 48 tpi.

What is wrong

Thanks,

Cap