my microSD is 8GB, I install CentOs 7, then DISK FULL, how I can fixed?

michaelk · 04-12-2022, 10:03 AM

If possible boot a USB live version of gparted on your PC.
https://gparted.org/livecd.php

Colombia · 04-12-2022, 10:11 AM

yet I have problems:

Code:

[root@localhost /]# lvextend -L4G /dev/mmcblk0p3
-bash: lvextend: command not found
[root@localhost /]# yum -y install lvextend
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.cedia.org.ec
 * centos-kernel: mirror.cedia.org.ec
 * extras: mirror.cedia.org.ec
 * updates: mirror.cedia.org.ec
No package lvextend available.
Error: Nothing to do
[root@localhost /]#

(https://access.redhat.com/documentat...tion/lv_extend)

michaelk · 04-12-2022, 10:27 AM

Your not using LVM.

Have you tried running a live USB version of gparted?

Colombia · 04-12-2022, 10:45 AM

Quote:

Originally Posted by Colombia

yes!!
so please: how I do this?

the "trick" is use growpart:

Code:

[root@localhost /]# lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
mmcblk0     179:0    0  7.3G  0 disk
├─mmcblk0p2 179:2    0  488M  0 part [SWAP]
├─mmcblk0p3 179:3    0  1.7G  0 part /
└─mmcblk0p1 179:1    0  286M  0 part /boot


[root@localhost /]# growpart /dev/mmcblk0 3
CHANGED: partition=3 start=1593344 old: size=3516416 end=5109760 new: size=13684703 end=15278047


[root@localhost /]# lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
mmcblk0     179:0    0  7.3G  0 disk
├─mmcblk0p2 179:2    0  488M  0 part [SWAP]
├─mmcblk0p3 179:3    0  6.5G  0 part /
└─mmcblk0p1 179:1    0  286M  0 part /boot
[root@localhost /]#

but the command "growpart /dev/mmcblk0 3" take ALL "free space", how I can resize in only 2GB and have the rest of disk as "OTHER partition" ?

michaelk · 04-12-2022, 11:15 AM

You resized the partition but I do not think you resized the filesystem.

One way would be to delete partition 3 and create a new one the desired size starting at the exact same spot. Nothing will happen to the filesystem. Then use resize2fs to enlarge the filesystem.

Colombia · 04-12-2022, 11:50 AM

Quote:

Originally Posted by michaelk

You resized the partition but I do not think you resized the filesystem

100 true!!

I am desperated, when I run

Code:

reboot

then AGAIN:

Code:

[root@localhost csf]# df -hT
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/root      ext4      1.7G  1.5G  104M  94% /
devtmpfs       devtmpfs  430M     0  430M   0% /dev
tmpfs          tmpfs     463M     0  463M   0% /dev/shm
tmpfs          tmpfs     463M   12M  451M   3% /run
tmpfs          tmpfs     463M     0  463M   0% /sys/fs/cgroup
/dev/mmcblk0p1 vfat      286M   50M  237M  18% /boot
tmpfs          tmpfs      93M     0   93M   0% /run/user/0
[root@localhost csf]#

why ??...

please: how I can ASIGN only 2GB to my "hard disk" ?? (/dev/root or /mmcblk0/mmcblk0p3)

michaelk · 04-12-2022, 12:21 PM

Quote:

why?...

Because your not paying attention or understanding what is posted.

A partition is nothing more then a container that defines limits of a filesystem. When a filesystem is created the mkfs tool by default uses the entire size of the partition. Resizing is actually two steps, changing the size of the filesystem and changing the size of the partition.

growpart only resizes the partition to use adjacent unallocated space. It does not increase the size of the filesystem.

There is some risk involved but it is doable.

1. Using fdisk delete partition 3. You are just deleting location of the partition in the table but not the filesystem itself.

2. Using fdisk create a new partition 3. Its starting point should be the same as the old one. Define the end as 2GB. You might have to reboot for the kernel to see the new partition.

3. Use resize2fs to resize2fs the filesystem. ext4 filesystems can be resized larger regardless if it is active.

computersavvy · 04-12-2022, 05:15 PM

You have already been told how, repeatedly.

1. Take the sd card to a different machine (probably with a USB card reader)
2. Use gparted (or equivalent) to expand the partition and file system
3. Put the card back into the device where it boots and you will be happy

Most systems will not allow altering the root partition when it is in use so that explains why you cannot do that from the running system booted from that card.

Colombia · 04-12-2022, 08:50 PM

Quote:

Originally Posted by michaelk

Because your not paying attention or understanding what is posted...

Quote:

Originally Posted by computersavvy

You have already been told how, repeatedly...

many thanks and SO SORRY,
maybe my english is SO POOR...

I will re-read ALL again.

Regards