磁碟掛載問題與磁碟的檔案格式
一、磁碟掛載問題
問題1:掛載時遇到
Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
解決辦法:執行fsck /dev/sdb1命令。
[root@CENTOS100 /]# fsck /dev/sdb1 fsck from util-linux 2.23.2 fsck.fat 3.0.20 (12 Jun 2013) 0x41: Dirty bit is set. Fs was not properly unmounted and some data may be corrupt. 1) Remove dirty bit2) No action ? 1 Leaving filesystem unchanged. /dev/sdb1: 2 files, 7599/61032429 clusters [root@CENTOS100 /]# mount /dev/sdb1 /sdb
問題2:掛載時遇到
mount: /dev/sdb is write-protected, mounting mount: unknown filesystem type '(null)'
解決辦法:
1) 檢視磁碟 [root@localhost ~]# fdisk -l 2) 格式化磁碟 [root@localhost ~]# mkfs.ext4 /dev/sdb Proceed anyway? (y,n) y 3)掛載 [root@localhost ~]# mount /dev/sdb /image 4)檢視效果 [root@localhost ~]# df -lh
二、linux下檢視磁碟分割槽的檔案系統格式
df -T 只可以檢視已經掛載的分割槽和檔案系統型別。
FilesystemType1K-blocks Used Available Use% Mounted on
/dev/sda1ext420642428
3698868 15894984 19% /
tmpfstmpfs32947160 0 32947160 0% /dev/shm
fdisk -l 可以顯示出所有掛載和未掛載的分割槽,但不顯示檔案系統型別。
Disk /dev/sda: 299.4 GB, 299439751168 bytes
255 heads, 63 sectors/track, 36404 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000576df
Device Boot Start End Blocks Id System
/dev/sda1 * 1 2611 20971520 83 Linux
/dev/sda2 2611 3134 4194304 82 Linux swap / Solaris
/dev/sda3 3134 36404 267248282 83 Linux
parted -l 可以檢視未掛載的檔案系統型別,以及哪些分割槽尚未格式化。
Model: LSI MR9240-8i (scsi)
Disk /dev/sda: 299GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type FilesystemFlags
1 1049kB 21.5GB 21.5GB primaryext4boot
2 21.5GB 25.8GB 4295MB primarylinux-swap(v1)
3 25.8GB 299GB 274GB primaryext4
lsblk -f 也可以檢視未掛載的檔案系統型別。
NAMEFSTYPELABEL UUID MOUNTPOINT
sda
|-sda1ext4c4f338b7-13b4-48d2-9a09-8c12194a3e95
/
|-sda2swap21ead8d0-411f-4c23-bdca-642643aa234b
[SWAP]
`-sda3ext42872b14e-45va-461e-8667-43a6f04b7bc9
file -s /dev/sda3
/dev/sda3: Linux rev 1.0ext4filesystem data (needs journal recovery) (extents) (large files) (huge files)