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Chris Gerhard's Weblog
Friday June 20, 2008
Pushing grub
After doing my second ZFS to ZFS live upgrade on a laptop I realise I will be starting to test grub's ability to handle lots of different boot targets in it's boot menu:
Already I can see that grub has a scrolling feature I had never seen before!
( Jun 20 2008, 05:19:57 PM BST ) Permalink Trackback
Tuesday May 20, 2008
Recoving OpenSolaris root and grub Twenty years ago I fat fingered my workstation. Then it was using "newfs -n" rather than "newfs -N", shortly after the system paniced unable to find i-node 2. I had to restore. Restoring a diskless 3/50 running SunOS 3.5 was only less painful because I used to dump, when dump was dump not ufsdump, the network disk partitions of all the clients every night. Sorry I digress but it is still burned on my memory.
Today I fat fingered my laptop. I managed to type a script, at the command prompt, that ran with root priveleges and ended up doing "cd ../.. ; rm -r *". That took it to /. I stopped it but the damage was already done. However since I am running OpenSolaris and had taken the precaution of taking a recursive snapshot of the pool after I last installed any software all I had to do was roll back the filesystems.
Specifically I had to roll back:
rpool - It contains the grub menu or at least it does once I recovered it.
rpool/ROOT - I'm not sure I had to roll this one back but it seemed wise.
rpool/ROOT/opensolaris - yes the real root file system. The lack of a kernel was certain to cause problems.
rpool/ROOT/opensolaris/opt - again I'm not sure I had to roll this one back but it seems best to keep the root file systems consistent.
I need to bring those auto snapshot scripts over.
I'll get to describe what I was doing later. It was very cool, well quite cool.
( May 20 2008, 10:10:47 PM BST ) Permalink Trackback
Sunday March 25, 2007
Operating systems as children Solaris: you stay at that end of the disk. Windows you stay at the other and no talking.
Right I'm only going to say this once:
Solaris: you will not, repeat not, delete Windows from the grub menu.
Windows: Even if Solaris does delete you from the grub menu you are not to make your partition the active one so that Solaris can't boot.
Thank you.
Tags: solaris windows grub fdisk
( Mar 25 2007, 08:57:29 PM BST ) Permalink Trackback
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