Path: utzoo!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request From: sunquest!whm@uunet.uu.net (Bill Mitchell) Newsgroups: comp.sys.sun Subject: Re: A dump/restore HAZARD involving consecutive level 0 dumps Keywords: Miscellaneous Message-ID: <2199@brchh104.bnr.ca> Date: 26 Mar 91 16:00:00 GMT Sender: news@brchh104.bnr.ca Organization: Sun-Spots Lines: 32 Approved: Sun-Spots@rice.edu X-Original-Date: 25 Mar 91 22:58:37 GMT X-Refs: Original: v10n63, Replies: v10n69 X-Sun-Spots-Digest: Volume 10, Issue 69, message 10 X-Note: Submissions: sun-spots@rice.edu, Admin: sun-spots-request@rice.edu In article <2100@brchh104.bnr.ca>, I described a problem that prevents restore from properly using an incremental tape that one would expect to be valid. In that article I wrote: > In the course of typing this note it occurred to me that it might be > possible to avoid this problem by not specifying dump's "u" flag on the > second dump, but I haven't tried this to see if it works. Today I tried this approach and it *did not* work. Also, in the orginal article I said that using the first of two consecutive level 0 dumps with an incremental dump yielded the message "incremental tape too high". I got that wrong, the message is "Incremental volume too low." (If you do two consecutive level 0 dumps, omit "u" on the second dump, restore the second dump, and then try to put on an incremental, the message is "Incremental volume too high". An old version of the source for restore seems to indicate that restore expects the date match to be exact. That is, if a level 0 dump is done at 10:12 on 3/1/91, the level 1 dump must contain information that indicates that it was based on a level 0 dump done at 10:12 on 3/1/91. I presume one could workaround by having a script that sets the system date appropriately based on the contents of /etc/dumpdates and then starts the second dump, but the date needs to be accurate to the second. I don't think it would be a snap to do this reliably. Bill Mitchell whm@sunquest.com Sunquest Information Systems sunquest!whm@arizona.edu 930 N. Finance Center Dr. {arizona,uunet}!sunquest!whm Tucson, AZ, 85710 sunquest!whm@uunet.uu.net 602-885-7700