目录
## 1 emmc
## 2 uboot查看
## 3 kernel查看
方法1
方法2
方法3
方法4
方法5
方法6
方法7
方法8
方法9
方法10
## 1 emmc
我们要说的是，User Data Partition中的再分区
可简化为
## 2 uboot查看
u-boot=> mmc partPartition Map for MMC device 2 -- Partition Type: DOSPart Start Sector Num Sectors UUID Type1 16384 131072 3bb27e95-01 0c2 1835008 28942336 3bb27e95-02 833 147456 98304 3bb27e95-03 834 245760 1589248 3bb27e95-04 0f Extd5 245762 16382 3bb27e95-05 836 262146 1572862 3bb27e95-06 83## 3 kernel查看
方法1
/proc/partitions
root@xboard:~# cat /proc/partitions
major minor #blocks name31 0 8192 mtdblock0179 0 15388672 mmcblk2179 1 65536 mmcblk2p1179 2 14471168 mmcblk2p2179 3 49152 mmcblk2p3179 4 1 mmcblk2p4179 5 8191 mmcblk2p5179 6 786431 mmcblk2p6179 96 31154688 mmcblk1179 97 65536 mmcblk1p1179 98 31080960 mmcblk1p2方法2
/dev/block
root@xboard:~# ls -l /dev/block/
total 0
lrwxrwxrwx 1 root root 10 May 13 2022 179:0 -> ../mmcblk2
lrwxrwxrwx 1 root root 12 Aug 31 2023 179:1 -> ../mmcblk2p1
lrwxrwxrwx 1 root root 12 May 13 2022 179:2 -> ../mmcblk2p2
lrwxrwxrwx 1 root root 12 May 13 2022 179:3 -> ../mmcblk2p3
lrwxrwxrwx 1 root root 15 May 13 2022 179:32 -> ../mmcblk2boot0
lrwxrwxrwx 1 root root 12 May 13 2022 179:4 -> ../mmcblk2p4
lrwxrwxrwx 1 root root 12 May 13 2022 179:5 -> ../mmcblk2p5
lrwxrwxrwx 1 root root 12 May 13 2022 179:6 -> ../mmcblk2p6
lrwxrwxrwx 1 root root 15 May 13 2022 179:64 -> ../mmcblk2boot1
lrwxrwxrwx 1 root root 10 May 13 2022 179:96 -> ../mmcblk1
lrwxrwxrwx 1 root root 12 Aug 31 2023 179:97 -> ../mmcblk1p1
lrwxrwxrwx 1 root root 12 Aug 31 2023 179:98 -> ../mmcblk1p2
lrwxrwxrwx 1 root root 12 May 13 2022 31:0 -> ../mtdblock0
lrwxrwxrwx 1 root root 8 May 13 2022 7:0 -> ../loop0
lrwxrwxrwx 1 root root 8 May 13 2022 7:1 -> ../loop1
lrwxrwxrwx 1 root root 8 May 13 2022 7:2 -> ../loop2
lrwxrwxrwx 1 root root 8 May 13 2022 7:3 -> ../loop3
lrwxrwxrwx 1 root root 8 May 13 2022 7:4 -> ../loop4
lrwxrwxrwx 1 root root 8 May 13 2022 7:5 -> ../loop5
lrwxrwxrwx 1 root root 8 May 13 2022 7:6 -> ../loop6
lrwxrwxrwx 1 root root 8 May 13 2022 7:7 -> ../loop7root@xboard:~# ls -al /dev/block/179*
lrwxrwxrwx 1 root root 10 May 13 2022 /dev/block/179:0 -> ../mmcblk2
lrwxrwxrwx 1 root root 12 Aug 31 2023 /dev/block/179:1 -> ../mmcblk2p1
lrwxrwxrwx 1 root root 12 May 13 2022 /dev/block/179:2 -> ../mmcblk2p2
lrwxrwxrwx 1 root root 12 May 13 2022 /dev/block/179:3 -> ../mmcblk2p3
lrwxrwxrwx 1 root root 15 May 13 2022 /dev/block/179:32 -> ../mmcblk2boot0
lrwxrwxrwx 1 root root 12 May 13 2022 /dev/block/179:4 -> ../mmcblk2p4
lrwxrwxrwx 1 root root 12 May 13 2022 /dev/block/179:5 -> ../mmcblk2p5
lrwxrwxrwx 1 root root 12 May 13 2022 /dev/block/179:6 -> ../mmcblk2p6
lrwxrwxrwx 1 root root 15 May 13 2022 /dev/block/179:64 -> ../mmcblk2boot1
lrwxrwxrwx 1 root root 10 May 13 2022 /dev/block/179:96 -> ../mmcblk1
lrwxrwxrwx 1 root root 12 Aug 31 2023 /dev/block/179:97 -> ../mmcblk1p1
lrwxrwxrwx 1 root root 12 Aug 31 2023 /dev/block/179:98 -> ../mmcblk1p2方法3
mount
cat /proc/mounts
root@xboard:~# mount
/dev/mmcblk2p2 on / type ext4 (rw,relatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=667872k,nr_inodes=166968,mode=755)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,relatime)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup2 on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /var/volatile type tmpfs (rw,relatime)
/dev/mmcblk2p6 on /cache type ext4 (rw,nosuid,nodev,relatime)
/dev/mmcblk2p5 on /run/media/mmcblk2p5 type ext2 (rw,relatime,errors=continue)
/dev/mmcblk1p1 on /run/media/mmcblk1p1 type vfat (rw,relatime,gid=6,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/mmcblk2p1 on /run/media/mmcblk2p1 type vfat (rw,relatime,gid=6,fmask=0007,dmask=0007,allow_utime=0020,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/mmcblk1p2 on /run/media/mmcblk1p2 type ext4 (rw,relatime)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=199396k,mode=700)方法4
dmesg
方法5
fdisk
root@xboard:~# fdisk -l /dev/mmcblk2
Disk /dev/mmcblk2: 14.69 GiB, 15758000128 bytes, 30777344 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: dos
Disk identifier: 0x3bb27e95Device Boot Start End Sectors Size Id Type
/dev/mmcblk2p1 16384 147455 131072 64M c W95 FAT32 (LBA)
/dev/mmcblk2p2 1835008 30777343 28942336 13.8G 83 Linux
/dev/mmcblk2p3 147456 245759 98304 48M 83 Linux
/dev/mmcblk2p4 245760 1835007 1589248 776M f W95 Ext'd (LBA)
/dev/mmcblk2p5 245762 262143 16382 8M 83 Linux
/dev/mmcblk2p6 262146 1835007 1572862 768M 83 LinuxPartition table entries are not in disk order.类似的命令还有sfdisk
root@xboard:~# sfdisk -l /dev/mmcblk2
Disk /dev/mmcblk2: 14.69 GiB, 15758000128 bytes, 30777344 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: dos
Disk identifier: 0x3bb27e95Device Boot Start End Sectors Size Id Type
/dev/mmcblk2p1 16384 147455 131072 64M c W95 FAT32 (LBA)
/dev/mmcblk2p2 1835008 30777343 28942336 13.8G 83 Linux
/dev/mmcblk2p3 147456 245759 98304 48M 83 Linux
/dev/mmcblk2p4 245760 1835007 1589248 776M f W95 Ext'd (LBA)
/dev/mmcblk2p5 245762 262143 16382 8M 83 Linux
/dev/mmcblk2p6 262146 1835007 1572862 768M 83 LinuxPartition table entries are not in disk order.方法6
sys/class/block
root@xboard:/sys/class/block# ll
total 0
lrwxrwxrwx 1 root root 0 May 13 2022 loop0 -> ../../devices/virtual/block/loop0
lrwxrwxrwx 1 root root 0 May 13 2022 loop1 -> ../../devices/virtual/block/loop1
lrwxrwxrwx 1 root root 0 May 13 2022 loop2 -> ../../devices/virtual/block/loop2
lrwxrwxrwx 1 root root 0 May 13 2022 loop3 -> ../../devices/virtual/block/loop3
lrwxrwxrwx 1 root root 0 May 13 2022 loop4 -> ../../devices/virtual/block/loop4
lrwxrwxrwx 1 root root 0 May 13 2022 loop5 -> ../../devices/virtual/block/loop5
lrwxrwxrwx 1 root root 0 May 13 2022 loop6 -> ../../devices/virtual/block/loop6
lrwxrwxrwx 1 root root 0 May 13 2022 loop7 -> ../../devices/virtual/block/loop7
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk1 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b50000.mmc/mmc_host/mmc1/mmc1:59b4/block/mmcblk1
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk1p1 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b50000.mmc/mmc_host/mmc1/mmc1:59b4/block/mmcblk1/mmcblk1p1
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk1p2 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b50000.mmc/mmc_host/mmc1/mmc1:59b4/block/mmcblk1/mmcblk1p2
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2boot0 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2boot0
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2boot1 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2boot1
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2p1 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2p1
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2p2 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2p2
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2p3 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2p3
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2p4 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2p4
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2p5 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2p5
lrwxrwxrwx 1 root root 0 May 13 2022 mmcblk2p6 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30b60000.mmc/mmc_host/mmc2/mmc2:0001/block/mmcblk2/mmcblk2p6
lrwxrwxrwx 1 root root 0 May 13 2022 mtdblock0 -> ../../devices/platform/soc@0/soc@0:bus@30800000/30bb0000.spi/spi_master/spi3/spi3.0/mtd/mtd0/mtdblock0方法7
root@xboard:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mtdblock0 31:0 0 8M 0 disk
mmcblk2 179:0 0 14.7G 0 disk
|-mmcblk2p1 179:1 0 64M 0 part /run/media/mmcblk2p1
|-mmcblk2p2 179:2 0 13.8G 0 part /
|-mmcblk2p3 179:3 0 48M 0 part
|-mmcblk2p4 179:4 0 1K 0 part
|-mmcblk2p5 179:5 0 8M 0 part /run/media/mmcblk2p5
`-mmcblk2p6 179:6 0 768M 0 part /cache
mmcblk2boot0 179:32 0 4M 1 disk
mmcblk2boot1 179:64 0 4M 1 disk
mmcblk1 179:96 0 29.7G 0 disk
|-mmcblk1p1 179:97 0 64M 0 part /run/media/mmcblk1p1
`-mmcblk1p2 179:98 0 29.7G 0 part /run/media/mmcblk1p方法8
sudo apt install hwinfo
root@xboard:$ hwinfo --disk
49: SCSI 2000.0: 10600 Disk [Created at block.245]Unique ID: R7kM.nTPZhtpisM9Parent ID: 37TO.741NuwlerHDSysFS ID: /class/block/sdaSysFS BusID: 32:0:0:0SysFS Device Link: /devices/pci0000:00/0000:00:10.0/host32/target32:0:0/32:0:0:0Hardware Class: diskModel: "VMware Virtual S"Vendor: "VMware,"Device: "VMware Virtual S"Revision: "1.0"Driver: "mptspi", "sd"Driver Modules: "mptspi"Device File: /dev/sda (/dev/sg1)Device Files: /dev/sda, /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:0:0Device Number: block 8:0-8:15 (char 21:1)BIOS id: 0x80Drive status: no mediumConfig Status: cfg=new, avail=yes, need=no, active=unknownAttached to: #7 (SCSI storage controller)
方法9
lshw
root@xboard:$ sudo lshw -class disk*-disk description: SCSI Diskproduct: VMware Virtual Svendor: VMware,physical id: 0.0.0bus info: scsi@32:0.0.0logical name: /dev/sdaversion: 1.0size: 100GiB (107GB)capabilities: 7200rpm partitioned partitioned:dosconfiguration: ansiversion=2 logicalsectorsize=512 sectorsize=512 signature=e51a4690*-cdromdescription: DVD-RAM writerproduct: VMware SATA CD01vendor: NECVMWarphysical id: 0.0.0bus info: scsi@3:0.0.0logical name: /dev/cdromlogical name: /dev/cdrwlogical name: /dev/dvdlogical name: /dev/sr0version: 1.00capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ramconfiguration: ansiversion=5 status=open
方法10
root@xboard:$ sudo parted -l
Model: ATA WDC WD10EZEX-75W (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags: Number Start End Size File system Name Flags1 1049kB 538MB 537MB fat32 EFI System Partition boot, esp2 538MB 1000GB 1000GB ext4## 4 参考
【1】eMMC深入浅出 第二章 eMMC结构 第二节 分区以及存储区域 - 知乎
【2】eMMC（二）——分区管理_emmc gpt分区-CSDN博客
