Re: [LUG] Meeting Shoreline, FIFTH Mar

[tom <tompotts@xxxxxxxxxxxxxxxxxxxxxx>]

On 21/02/11 09:53, Gordon Henderson wrote:
> On Mon, 21 Feb 2011, Philip Hudson wrote:
>
> > On 21 Feb, 2011, at 8:06 am, Gordon Henderson wrote:
> >
> > > fstab is fairly straightforward, but I don't do uuid's ...
> >
> > Why's that, Gordon? I know nothing about it, but assumed (so often 
> > fatal) that UUIDs were "better" in some way.
>
> I'm old fahioned.
>
> I build servers for a purpose - they don't change in their lifetime, 
> so I see no reason to use features that are designed to help when 
> swapping drives, etc. Disk labels and uuids might be nice, but I've no 
> use for them, so I won't burden my brain by known about them... 
> (although I do know about them. Bother!)  When I build a box, I know 
> that /dev/md1 will be root, and so on so why add yet another layer of 
> abstraction on top of what I already know.
>
> Anyway, it's all in the man page, just type
>
>   man fstab
>
> or look at the one in-use:
>
>   cat /etc/fstab
>
> The machine I'm typing this on:
>
> # /etc/fstab: static file system information.
> #
> # <file system> <mount point> <type> <options> <dump> <pass>
> proc        /proc        proc    defaults                0 0
> sysfs        /sysfs        sysfs    defaults                0 0
>
> /dev/md1    /        ext3    defaults,noatime,errors=remount-ro    0 1
> /dev/md2    none        swap    sw                    0 0
> /dev/md3    /usr        ext3    defaults,noatime            0 2
> /dev/md5    /var        ext3    defaults,noatime            0 2
> /dev/md6    /archive    ext3    defaults,noatime,noexec,ro        0 2
>
> /dev/shm    /tmp        tmpfs    
> rw,noexec,noatime,mode=1777,size=64m    0 0
> /dev/shm    /var/tmp    tmpfs    
> rw,noexec,noatime,mode=1777,size=64m    0 0
>
> #/dev/shm    /var/spool/MIMEDefang    tmpfs    
> rw,nodiratime,noatime,size=128m,mode=0700,uid=102,gid=0
>
> Now what's hard to understand about that ;-)
>
> Gordon
CRMIIW but another argument against UUID's is that, it seems to me that 
if your system has 5 disks then on bootup all 5 disks are examined 
before any attempt is made to get started - the boot process seems a lot 
slower than when you just tell it where the disks are and which ones to 
use.
Now it takes me 10minutes to move the disks physically and two seconds 
to edit menu.lst but an extra 10 seconds to boot up using uuid's
Its one of those things that wastes 1000 time the time is was meant to save.
Tom te tom te tom

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