Hi, list members:
I am using usb card-reader to update my linux system. My host system is
debian. Kernel version is 2.4.19.
My update method is:
When the computer is booting up, it checks there is a usb card-reader or
not. If there is, it means we need to update system. If there is not, it
means we need not.
Then, I write a script named S00versionup.sh and put it in /etc/rc2.d,
which is default run level. In the script, first, I mount the usb
card-reader, if it is successful, I tar the file stored in it to overwrite
all files on the harddisk,. at last I reboot the system. If the mount
failed, it means there is no card-reader, that to say it is no need to
update. so system will normally bootup.
My question is:
Even if there is a usb card-reader, the mount fails occasionally. I
checked the booting messages and found that:
message1: SCSI device sda: 2104704 512-bye hdwr sectors(1078 MS)
sad: Write Protect is off
sad1
message2: INIT: Entering runlevel: 2
When message1 appears before message2, the mount will successful. When
message1 appears after message2, the mount will fail. I know message2 is
printed by /sbin/init, I want to know what is the timing of message1, and
how to control it.
As a conclusion, I need to put the mount command surely after the message1
and as early as possible in the S** of /rc2.d.
If you understand it, Pls help me.
Forgive me for my poor English, thank you in advance.
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