寫入動作
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由 企鵝狂 » 週一 11月 21, 2005 11:15 pm
http://www.tuxfiles.org/linuxhelp/fstab.html
sync and async How the input and output to the filesystem should be done. sync means it's done synchronously. If you look at the example fstab, you'll notice that this is the option used with the floppy. In plain English, this means that when you, for example, copy a file to the floppy, the changes are physically written to the floppy at the same time you issue the copy command.
However, if you have the async option in /etc/fstab, input and output is done asynchronously. Now when you copy a file to the floppy, the changes may be physically written to it long time after issuing the command. This isn't bad, and may sometimes be favorable, but can cause some nasty accidents: if you just remove the floppy without unmounting it first, the copied file may not physically exist on the floppy yet!
async is the default. However, it may be wise to use sync with the floppy, especially if you're used to the way it's done in Windows and have a tendency to remove floppies before unmounting them first.
如果不寫在fstab裡面
那就mount /dev/sda0 /mnt/usb -o sync
- 代碼: 選擇全部
/dev/fd0 /media/floppy auto rw,noauto,user,sync 0 0
sync and async How the input and output to the filesystem should be done. sync means it's done synchronously. If you look at the example fstab, you'll notice that this is the option used with the floppy. In plain English, this means that when you, for example, copy a file to the floppy, the changes are physically written to the floppy at the same time you issue the copy command.
However, if you have the async option in /etc/fstab, input and output is done asynchronously. Now when you copy a file to the floppy, the changes may be physically written to it long time after issuing the command. This isn't bad, and may sometimes be favorable, but can cause some nasty accidents: if you just remove the floppy without unmounting it first, the copied file may not physically exist on the floppy yet!
async is the default. However, it may be wise to use sync with the floppy, especially if you're used to the way it's done in Windows and have a tendency to remove floppies before unmounting them first.
如果不寫在fstab裡面
那就mount /dev/sda0 /mnt/usb -o sync
http://news.bbc.co.uk/1/hi/world/asia-pacific/country_profiles/1285915.stm
Country profile: Taiwan
Map of Taiwan
Taiwan is the island which has for all practical purposes been independent for half a century, but which China regards as a rebel region that must be reunited with the mainland - by force if necessary.
Country profile: Taiwan
Map of Taiwan
Taiwan is the island which has for all practical purposes been independent for half a century, but which China regards as a rebel region that must be reunited with the mainland - by force if necessary.
- 企鵝狂
- 活潑的高中生
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