瑞芯微ROCK960 RK3399烧录image后扩容rootfs

问题描述：

rk3399开发板烧录官网提供的ubuntu镜像： ubuntu 16.04 server arm64（下载地址：https://www.96boards.org/documentation/consumer/rock/downloads/ubuntu.md.html）,

开发板上电运行查看系统根目录容量已使用96%：

root@rock960:~# df
filesystem     1k-blocks    used available use% mounted on
/dev/root        1515376 1353320     67032  96% /
devtmpfs         1951660       0   1951660   0% /dev
tmpfs            1952236       0   1952236   0% /dev/shm
tmpfs            1952236   49692   1902544   3% /run
tmpfs               5120       0      5120   0% /run/lock
tmpfs            1952236       0   1952236   0% /sys/fs/cgroup
tmpfs             390448       0    390448   0% /run/user/0

root@rock960:~# 

 

再查看磁盘容量，32gb emmc实际可用容量29gb，除去已分区容量还有27.5gb容量未分区：

root@rock960:~# fdisk -l /dev/mmcblk1
disk /dev/mmcblk1: 29.1 gib, 31268536320 bytes, 61071360 sectors
units: sectors of 1 * 512 = 512 bytes
sector size (logical/physical): 512 bytes / 512 bytes
i/o size (minimum/optimal): 512 bytes / 512 bytes
disklabel type: gpt
disk identifier: f464c417-6f1f-4bf8-a1ce-bdb432a3bd1b

device           start      end  sectors  size type
/dev/mmcblk1p1      64     8063     8000  3.9m linux filesystem
/dev/mmcblk1p2   16384    24575     8192    4m linux filesystem
/dev/mmcblk1p3   24576    32767     8192    4m linux filesystem
/dev/mmcblk1p4   32768   262143   229376  112m efi system
/dev/mmcblk1p5  262144  3409886  3147743  1.5g linux filesystem
root@rock960:~# 

 

因此需要把未分区的27.5gb磁盘空间追加到/dev/mmcblk1p5并扩容rootfs文件系统。解决方法主要用到两个命令：parted和resize2fs。

首先重新分配/dev/mmcblk1p5分区大小到覆盖整个磁盘剩余容量：（注意fdisk不支持gpt分区）

root@rock960:~# parted /dev/mmcblk1
gnu parted 3.2
using /dev/mmcblk1
welcome to gnu parted! type 'help' to view a list of commands.
(parted) print                                                            
model: mmc bjnb4r (sd/mmc)
disk /dev/mmcblk1: 31.3gb
sector size (logical/physical): 512b/512b
partition table: gpt
disk flags: 

number  start   end     size    file system  name     flags
 1      32.8kb  4129kb  4096kb               loader1
 2      8389kb  12.6mb  4194kb               loader2
 3      12.6mb  16.8mb  4194kb               trust
 4      16.8mb  134mb   117mb   fat16        boot     boot, esp
 5      134mb   1746mb  1612mb  ext4         rootfs

(parted) unit s                                                           
(parted) print                                                            
model: mmc bjnb4r (sd/mmc)
disk /dev/mmcblk1: 61071360s
sector size (logical/physical): 512b/512b
partition table: gpt
disk flags: 

number  start     end        size       file system  name     flags
 1      64s       8063s      8000s                   loader1
 2      16384s    24575s     8192s                   loader2
 3      24576s    32767s     8192s                   trust
 4      32768s    262143s    229376s    fat16        boot     boot, esp
 5      262144s   3409886s   3147743s   ext4         rootfs
 
(parted) resizepart 5 100%                                                
(parted) print
model: mmc bjnb4r (sd/mmc)
disk /dev/mmcblk1: 61071360s
sector size (logical/physical): 512b/512b
partition table: gpt
disk flags: 

number  start    end        size       file system  name     flags
 1      64s      8063s      8000s                   loader1
 2      16384s   24575s     8192s                   loader2
 3      24576s   32767s     8192s                   trust
 4      32768s   262143s    229376s    fat16        boot     boot, esp
 5      262144s  61071326s  60809183s  ext4         rootfs
 
(parted) q  
root@rock960:~#

 

然后进行ext文件系统扩容：

root@rock960:~# resize2fs /dev/mmcblk1p5
resize2fs 1.42.13 (17-may-2015)
the filesystem is already 7601147 (4k) blocks long.  nothing to do!
root@rock960:~# 

 

这时查看根目录下已使用容量已经变成5%

root@rock960:~# df -th
filesystem     type      size  used avail use% mounted on
/dev/root      ext4       31g  1.4g   28g   5% /
devtmpfs       devtmpfs  2.0g     0  2.0g   0% /dev
tmpfs          tmpfs     2.0g     0  2.0g   0% /dev/shm
tmpfs          tmpfs     2.0g   51m  2.0g   3% /run
tmpfs          tmpfs     5.3m     0  5.3m   0% /run/lock
tmpfs          tmpfs     2.0g     0  2.0g   0% /sys/fs/cgroup
tmpfs          tmpfs     400m     0  400m   0% /run/user/0
root@rock960:~# 

 

后续：

tbd