ufsdump/ufsrestore

[grega]

We use ufsdump/ufsrestore for backups. I'm not too sure how it all works as it was set up before my time! I just run a script in cron each night.

When I do a ufsrestore ivfs /dev/rmt/0 1 on one of the dumped volumes, I get the following information;

Verify volume and initialize maps
Media block size is 126
Dump date: Thu Mar 22 18:00:33 2001
Dumped from: the epoch
Level 0 dump of /sybfiles on myserver:/dev/dsk/c1t2d0s5
Label: none
Extract directories from tape
Initialize symbol table.
ufsrestore >

I was looking at this the other day and wondered ... does anyone know where it gets that name the epoch?

Any pointers appreciated.

Greg.

 

[KenCunningham]

Don't know exactly, but epoch is defined as:

'a long period of time, esp. one in which there are new advances and great change'

Sounds like one of those quasi-academic things so beloved of those early unix pioneers! I suppose a level 0 dump could be described as including everything from the year dot! Hope this helps.

 

[jad]

the epoch is the beginning of time ... effectively

the last time you did a level -1 dump was indeed the epoch, since you can't really do a level -1 dump

 

[grega]

Thanks guys. That now makes sense!

Greg.