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Martin Hope
BMWW
Asked: 2023-12-12 20:11:11 +0800 CST
  • 6

您可以通过拍摄 LVM 快照，然后对快照进行扫描，对在线文件系统（例如 root）进行值得信赖的 EXT4 文件系统扫描，如下所示：

  1. 制作快照： lvcreate --snapshot --size 1G --name lv_root_SS --chunksize 4k /dev/VG1/lv_root

  2. EXT4 扫描：（ e2fsck -f /dev/dm-3新快照的设备名称为 dm-3）

  3. 删除快照： lvremove --yes VG1/lv_root_SS

那行得通吗？

e2fsck没有抱怨并且似乎扫描得很好。

lvm
Martin Hope
BMWW
Asked: 2018-05-03 07:10:41 +0800 CST
  • 1

当我在我的 tar 命令行中指定根文件夹时，我故意用“/”作为前缀来告诉 tar 它是根文件夹而不是当前文件夹的子文件夹。

例如

tar --create --file="/tmp/test.tar" "/tmp/Folder 1/"
tar: Removing leading `/' from member names

为什么去掉前面的“/”？

关于-f/--file=选项：
如果你想输出到你使用的标准输出，-f -但似乎你不能使用--file= -.
我认为-f并且--file是彼此的别名？

除了我在手册中找不到-f -选项（man tar）......不应该在那里吗？或者我只是忽略了它。

tar
Martin Hope
BMWW
Asked: 2018-05-01 11:51:44 +0800 CST
  • 5

格式化我的 EFI 分区时出现此错误：

Not enough clusters for a 32 bit FAT!"

我的磁盘使用 4096 扇区大小。

#mkfs.fat -v -F 32 -S 4096 /dev/sde1

mkfs.fat 4.1 (2017-01-24)
WARNING: Not enough clusters for a 32 bit FAT!
/dev/sde1 has 255 heads and 63 sectors per track,
hidden sectors 0x4000;
logical sector size is 4096,
using 0xf8 media descriptor, with 67584 sectors;
drive number 0x80;
filesystem has 2 32-bit FATs and 8 sectors per cluster.
FAT size is 16 sectors, and provides 8440 clusters.
There are 32 reserved sectors.
Volume ID is 05deb9f7, no volume label.

我的磁盘分区：

gdisk -l /dev/sde
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
   MBR: protective
   BSD: not present
   APM: not present
   GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sde: 244190646 sectors, 931.5 GiB
Logical sector size: 4096 bytes
Disk identifier (GUID): D0BA102E-86C5-4379-B314-9534F873C377
Partition table holds up to 128 entries
First usable sector is 6, last usable sector is 244190640
Partitions will be aligned on 256-sector boundaries
Total free space is 244123051 sectors (931.3 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048           69631   264.0 MiB   0700  EFI_FAT32

fsck.fat给出以下内容：

#fsck.fat -v /dev/sde1
fsck.fat 4.1 (2017-01-24)
Checking we can access the last sector of the filesystem
Warning: Filesystem is FAT32 according to fat_length and fat32_length fields,
  but has only 8440 clusters, less than the required minimum of 65525.
  This may lead to problems on some systems.
Boot sector contents:
System ID "mkfs.fat"
Media byte 0xf8 (hard disk)
      4096 bytes per logical sector
     32768 bytes per cluster
        32 reserved sectors
First FAT starts at byte 131072 (sector 32)
         2 FATs, 32 bit entries
     65536 bytes per FAT (= 16 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 262144 (sector 64)
      8440 data clusters (276561920 bytes)
63 sectors/track, 255 heads
     16384 hidden sectors
     67584 sectors total
Checking for unused clusters.
Checking free cluster summary.
/dev/sde1: 1 files, 1/8440 clusters
uefi fat32