wblock at wonkity.com
Sun Dec 15 05:48:29 UTC 2013
On Sat, 14 Dec 2013, Eric Dynamic wrote:
> There's the issue where you move disks from installed system A to a
> different motherboard
> and the system can't boot because it remembers the old system's device
> Where is the fix for this documented?
Labels are the easiest fix, a static name that sticks with a partition
or filesystem regardless of changing device numbers.
GPT labels are the preferred method, although that section does not
mention them yet. UFS labels work well also.
> I examined /boot/defaults/loader.conf and I believe the lines in
> question - for a /boot/loader.conf
> file I would create as the override for the problem are these:
> #currdev="disk1s1a" # Set the current device
> #root_disk_unit="0" # Force the root disk unit number
> #rootdev="disk1s1a" # Set the root filesystem
> I'll guess that "rootdev" is all I need to specify, or possibly
> "currdev" as well.
> I have this nit to pick: the loader.conf man page does NOT describe
> these labels at all,
> and the Online Manual in describing the boot process makes no mention
> of this mechanism,
The only one likely to be needed is vfs.root.mountfrom, which may need
to be set to the UFS filesystem that contains /etc/fstab.
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