Two questions related with FAT filesystem and block device layer.

Two questions related with FAT filesystem and block device layer.

[Zhonglin Zhang]

Hi,

 I have the following questions. Please help me.

 Software Environment:
    1. kernel - linux-2.4.19 + intel_bsp patched.
    2. DiskOnChip -- 64Mbytes.
 
 We have made the DiskOnChip as a u-disk.

 Q1.
    When I use "mkdosfs /dev/tffsa1", WIN2000 And WINXP can
    read/write the /dev/tffsa1. 
    When I use "mkdosfs -S 4096 /dev/tffsa1", WIN2000
    can read/write the /dev/tffsa1, But Winxp can't.

    Why? W can I make the winxp can read/write the /dev/sda1.

 Q2. 
    When using "mkdosfs /dev/tffsa1", Our VideoRecord isn't fluent. 

    When using "mkdosfs -S 4096 /dev/tffsa1", Our VideoRecord is fluent.
    I wonder how the sector size affect the Video Record.


 Our ultimate goal is 'Video Record is fluent and Win2000/Winxp can 
 read/write the /dev/tffsa1 as a u-disk.
  
 Could you anyone give me some good advice? 

 Thanks in advance!


 
    

     

-- 
Zhonglin Zhang <zhonglinzh@mobilesoft.com.cn>

Re: Two questions related with FAT filesystem and block device layer.

[OGAWA Hirofumi]

Zhonglin Zhang <zhonglinzh@mobilesoft.com.cn> writes:

>  Q1.
>     When I use "mkdosfs /dev/tffsa1", WIN2000 And WINXP can
>     read/write the /dev/tffsa1. 
>     When I use "mkdosfs -S 4096 /dev/tffsa1", WIN2000
>     can read/write the /dev/tffsa1, But Winxp can't.
>
>     Why? W can I make the winxp can read/write the /dev/sda1.

I don't know.

>  Q2. 
>     When using "mkdosfs /dev/tffsa1", Our VideoRecord isn't fluent. 
>
>     When using "mkdosfs -S 4096 /dev/tffsa1", Our VideoRecord is fluent.
>     I wonder how the sector size affect the Video Record.

I guess the cluster size was increased by "-S 4096", so the number of
times of block allocation became fewer.

>  Our ultimate goal is 'Video Record is fluent and Win2000/Winxp can 
>  read/write the /dev/tffsa1 as a u-disk.

How about testing the "mkdosfs -s 64 /dev/foo"?
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>