topic Re: how to mount USB /dev/sda,/dev/sdb,/dev/sdc/ ... only mount one fixed mount point /run/media/sda in i.MX Processors

how to mount USB /dev/sda,/dev/sdb,/dev/sdc/ ... only mount one fixed mount point /run/media/sda1 ?

gonewithwind-peter — Wed, 20 Oct 2021 17:29:07 GMT

Hi all,

I am playing maaxboard yocto sumo and zeus branch.

as you know, a USB disk after unplugging and plugging again, the device should change from /dev/sda to /dev/sdb , /dev/sdc ... and so on.

1. in zeus branch

if I add the line :/dev/sda1 /run/media/sda1 auto defaults,sync,rw,user 0 0 in /etc/fstab,

after unplugging and plugging once , it will auto mount it at /run/media/sdb1; unplugging and plugging ,it will auto mount it at /run/media/sdc1. but our app read/write only fix at /run/media/sda1

how can I do that mount USB /dev/sda,/dev/sdb,/dev/sdc/ ... only mount one mount point at /run/media/sda1 ? in zeus branch?

;;;;

2. but in sumo branch, I can do it well!

I add the below lines in /etc/fstab, it works! Although after unplugging and plugging once, the device change to /dev/sdb, sdc,sdd ... but it can always mount at the fixed mount point: /run/media/sda1!

I added in fstab that mean I force mount sdb,sdc,sdd at /run/media/sda1

/dev/sda1 /run/media/sda1 auto rw,user,noauto 0 0
/dev/sdb1 /run/media/sda1 auto rw,user,noauto 0 0
/dev/sdc1 /run/media/sda1 auto rw,user,noauto 0 0
/dev/sdd1 /run/media/sda1 auto rw,user,noauto 0 0
/dev/sde1 /run/media/sda1 auto rw,user,noauto 0 0
/dev/sdf1 /run/media/sda1 auto rw,user,noauto 0 0
/dev/sdg1 /run/media/sda1 auto rw,user,noauto 0 0

...

In zues, I added the same, but it did not work. it worked as I described in 1.

How can I do?

any help?

Thank you very much.

Re: how to mount USB /dev/sda,/dev/sdb,/dev/sdc/ ... only mount one fixed mount point /run/media/sda

Rita_Wang — Thu, 21 Oct 2021 10:03:13 GMT

Could you tell us which board are you using?

Re: how to mount USB /dev/sda,/dev/sdb,/dev/sdc/ ... only mount one fixed mount point /run/media/sda

gonewithwind-peter — Thu, 21 Oct 2021 13:15:56 GMT

@Rita_Wang

I use maaxboard https://www.avnet.com/wps/portal/us/products/new-product-introductions/npi/avnet-maaxboard/ . the processor is imx8mq

Re: how to mount USB /dev/sda,/dev/sdb,/dev/sdc/ ... only mount one fixed mount point /run/media/sda

gonewithwind-peter — Thu, 21 Oct 2021 16:43:03 GMT

I have found the solution after modified the file /etc/udev/rules.d/11-usb.rules that avnet technical supporter gave to me

KERNEL=="sd[a-z]", NAME="%k", SYMLINK+="sda1", GROUP="users"

ACTION=="add", KERNEL=="sd[a-z][0-9]", SYMLINK+="usbhd-%k", GROUP="users", NAME="%k"

ACTION=="add", KERNEL=="sd[a-z][0-9]", RUN+="/bin/mkdir -p /run/media/sda1"

ACTION=="add", KERNEL=="sd[a-z][0-9]", RUN+="/bin/mount -t auto -o rw,noauto,sync,dirsync,noexec,nodev,noatime /dev/%k /run/media/sda1"

ACTION=="remove", KERNEL=="sd[a-z][0-9]", RUN+="/bin/umount -l /run/media/sda1"

ACTION=="remove", KERNEL=="sd[a-z][0-9]", RUN+="/bin/rm -rf /run/media/sda1"

and add lines the /etc/fstab

/dev/sda1 /run/media/sda1 auto rw,user,noauto 0 0

/dev/sdb1 /run/media/sda1 auto rw,user,noauto 0 0

/dev/sdc1 /run/media/sda1 auto rw,user,noauto 0 0

/dev/sdd1 /run/media/sda1 auto rw,user,noauto 0 0

/dev/sde1 /run/media/sda1 auto rw,user,noauto 0 0

/dev/sdf1 /run/media/sda1 auto rw,user,noauto 0 0

/dev/sdg1 /run/media/sda1 auto rw,user,noauto 0 0

...