Why does files persist on mount points even after switching usb drives?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
0
down vote

favorite












I am using a Raspberry PI as MiniDLNA server and a usb drive to store content instead of storing it locally on sd card.
So I added the usb drive in fstab to get it automatically mount on startup and made a symlink to the same in the home directory.
Symlink
So, my old usb drive was very slow, so I removed the old one and swapped it with a relatively new formatted drive and to my surprise, all files that were present in the old drive were still visible on the new drive.



usb1 -> /mnt/usb1



Both drives uses FAT32 as file system and have 8GB of space, mounted at the same mount point /mnt/usb1 and originally available at /dev/sda1



How is that even possible if I swapped the old drive with another formatted and empty drive ?




linux mount




share|improve this question



















  • Do the files go away if you umount the drive?
    – Ignacio Vazquez-Abrams
    Apr 29 at 7:38










  • @IgnacioVazquez-Abrams Yes
    – Jatin Dhankhar
    Apr 29 at 12:10










  • Then the files aren't on the drive.
    – Ignacio Vazquez-Abrams
    Apr 29 at 12:11










  • Hmm, strange. It means they are on the sd card. But shouldn't it work. I am mounting the usb drive under a mount point and soft linking it to a the mount point. Dmesg doesn't show any error about the usb drive not getting mounted.
    – Jatin Dhankhar
    Apr 29 at 12:13















up vote
0
down vote

favorite












I am using a Raspberry PI as MiniDLNA server and a usb drive to store content instead of storing it locally on sd card.
So I added the usb drive in fstab to get it automatically mount on startup and made a symlink to the same in the home directory.
Symlink
So, my old usb drive was very slow, so I removed the old one and swapped it with a relatively new formatted drive and to my surprise, all files that were present in the old drive were still visible on the new drive.



usb1 -> /mnt/usb1



Both drives uses FAT32 as file system and have 8GB of space, mounted at the same mount point /mnt/usb1 and originally available at /dev/sda1



How is that even possible if I swapped the old drive with another formatted and empty drive ?




linux mount




share|improve this question



















  • Do the files go away if you umount the drive?
    – Ignacio Vazquez-Abrams
    Apr 29 at 7:38










  • @IgnacioVazquez-Abrams Yes
    – Jatin Dhankhar
    Apr 29 at 12:10










  • Then the files aren't on the drive.
    – Ignacio Vazquez-Abrams
    Apr 29 at 12:11










  • Hmm, strange. It means they are on the sd card. But shouldn't it work. I am mounting the usb drive under a mount point and soft linking it to a the mount point. Dmesg doesn't show any error about the usb drive not getting mounted.
    – Jatin Dhankhar
    Apr 29 at 12:13













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am using a Raspberry PI as MiniDLNA server and a usb drive to store content instead of storing it locally on sd card.
So I added the usb drive in fstab to get it automatically mount on startup and made a symlink to the same in the home directory.
Symlink
So, my old usb drive was very slow, so I removed the old one and swapped it with a relatively new formatted drive and to my surprise, all files that were present in the old drive were still visible on the new drive.



usb1 -> /mnt/usb1



Both drives uses FAT32 as file system and have 8GB of space, mounted at the same mount point /mnt/usb1 and originally available at /dev/sda1



How is that even possible if I swapped the old drive with another formatted and empty drive ?




linux mount




share|improve this question











I am using a Raspberry PI as MiniDLNA server and a usb drive to store content instead of storing it locally on sd card.
So I added the usb drive in fstab to get it automatically mount on startup and made a symlink to the same in the home directory.
Symlink
So, my old usb drive was very slow, so I removed the old one and swapped it with a relatively new formatted drive and to my surprise, all files that were present in the old drive were still visible on the new drive.



usb1 -> /mnt/usb1



Both drives uses FAT32 as file system and have 8GB of space, mounted at the same mount point /mnt/usb1 and originally available at /dev/sda1



How is that even possible if I swapped the old drive with another formatted and empty drive ?





linux mount





share|improve this question










share|improve this question




share|improve this question









asked Apr 29 at 7:17









Jatin Dhankhar

1




1











  • Do the files go away if you umount the drive?
    – Ignacio Vazquez-Abrams
    Apr 29 at 7:38










  • @IgnacioVazquez-Abrams Yes
    – Jatin Dhankhar
    Apr 29 at 12:10










  • Then the files aren't on the drive.
    – Ignacio Vazquez-Abrams
    Apr 29 at 12:11










  • Hmm, strange. It means they are on the sd card. But shouldn't it work. I am mounting the usb drive under a mount point and soft linking it to a the mount point. Dmesg doesn't show any error about the usb drive not getting mounted.
    – Jatin Dhankhar
    Apr 29 at 12:13

















  • Do the files go away if you umount the drive?
    – Ignacio Vazquez-Abrams
    Apr 29 at 7:38










  • @IgnacioVazquez-Abrams Yes
    – Jatin Dhankhar
    Apr 29 at 12:10










  • Then the files aren't on the drive.
    – Ignacio Vazquez-Abrams
    Apr 29 at 12:11










  • Hmm, strange. It means they are on the sd card. But shouldn't it work. I am mounting the usb drive under a mount point and soft linking it to a the mount point. Dmesg doesn't show any error about the usb drive not getting mounted.
    – Jatin Dhankhar
    Apr 29 at 12:13
















Do the files go away if you umount the drive?
– Ignacio Vazquez-Abrams
Apr 29 at 7:38




Do the files go away if you umount the drive?
– Ignacio Vazquez-Abrams
Apr 29 at 7:38












@IgnacioVazquez-Abrams Yes
– Jatin Dhankhar
Apr 29 at 12:10




@IgnacioVazquez-Abrams Yes
– Jatin Dhankhar
Apr 29 at 12:10












Then the files aren't on the drive.
– Ignacio Vazquez-Abrams
Apr 29 at 12:11




Then the files aren't on the drive.
– Ignacio Vazquez-Abrams
Apr 29 at 12:11












Hmm, strange. It means they are on the sd card. But shouldn't it work. I am mounting the usb drive under a mount point and soft linking it to a the mount point. Dmesg doesn't show any error about the usb drive not getting mounted.
– Jatin Dhankhar
Apr 29 at 12:13





Hmm, strange. It means they are on the sd card. But shouldn't it work. I am mounting the usb drive under a mount point and soft linking it to a the mount point. Dmesg doesn't show any error about the usb drive not getting mounted.
– Jatin Dhankhar
Apr 29 at 12:13
















active

oldest

votes











Your Answer







StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);








 

draft saved


draft discarded


















StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f440687%2fwhy-does-files-persist-on-mount-points-even-after-switching-usb-drives%23new-answer', 'question_page');

);

Post as a guest






















active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes










 

draft saved


draft discarded


























 


draft saved


draft discarded














StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f440687%2fwhy-does-files-persist-on-mount-points-even-after-switching-usb-drives%23new-answer', 'question_page');

);

Post as a guest
































































-

Popular posts from this blog

How to check contact read email or not when send email to Individual?

Image
Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this questi...
Read more

Displaying single band from multi-band raster using QGIS

Image
Clash Royale CLAN TAG #URR8PPP 1 How can I extract a single band from multi-band raster in QGIS? I have an remote sensed image which has 6 bands (including NDVI band), I want to display each band separately, but have no idea how to do. I have seen some questions similar here but none worked for me. The original image (has 6 bands) is: I want to display the band 6 which should be like this: But I tried gdal_translate, and couldn't get the correct result. What I have got is: qgis raster multi-band share | improve this question edited Mar 5 at 0:53 Summer asked Mar 4 at 6:42 Summer Summer 23 6 Is this any help gis.stackexchange.com/questions/220658/… ? if not gis.stackexchange.com/questions/62133/… might help. – Michael Stimson Mar 4 at 6:46 Thanks for answering but when I used gdal_translate, qgis showed that 'Error 4: Kayena.tif: No such file or directory". Would you know how to fi...
Read more

How many registers does an x86_64 CPU actually have?

Image
Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite I am currently learning reverse engineering and am studying the flags register. I had in my mind that rflags was just another name for one of the 16 general purpose registers, for example rax or rbx . But it looks like rflags is actually an additional register. So that makes 17 registers in total... how many more could there be? I have spent at least an hour on this and found numerous different answers. The best answer so far is this, which says that there are 40 registers in total. 16 General Purpose Registers 2 Status Registers 6 Code Segment Registers 16 SSE Registers 8 FPU/MMX Registers But if I add that up, I get 48. Could anybody provide an official answer on how many registers an x86_64 CPU has (e.g. an Intel i7). Additionally, I have seen references to 'hardware' and 'architectural' registers. What are those registers and how many are there? register x86-64 share | improve this...
Read more