Check sum

[Wim Van den Wyngaert]

I use a checksum/ima to checksum my exe files.

After the time change in Belgium this weekend, I got a new checksum for sys$common:[sysldr]sys$base_image.exe. And this on 4 nodes.

The file is not modified (dir/fu) since 2002.

Why ???

Wim

[Ian Miller.]

the datetime is stored in the base image.
Do a SET TIME=xxx command and you will see that file gets updated.

[Wim Van den Wyngaert]

Ian,

I suspected something like that. Is it normal that the moddat is not modified ?

Wim

[Hein van den Heuvel · Accepted solution]

That write goes behind the back of the file system. At boot time the LBN number for the block with the system time is remembered. During SET TIME, after a revalidation of the BOOT_CBLOCK a channel is assigned and a QIO WRITELBLK is issued. No 'file' is opened. So no modification date change.

fwiw,
Hein.