Bill Anderson wrote:
> Carlos E. R. wrote:
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>>
>>
>>
>> The Tuesday 2008-01-08 at 13:30 -0000, Dave Howorth wrote:
>>
>>> Bill Anderson wrote:
>>>> Insults are much easier than courtesy.
>>>
>>> You've been suffering a lot from insults and disbelievers and I
don't
>>> understand why :(
>>>
>>> I didn't post before because I thought I didn't have access to
a Unix
>>> box. Then I remembered that there is some old iron here. FWIW,
here are
>>> some samples from a session I just ran:
>>>
>>> Compaq Tru64 UNIX V5.1B (Rev. 2650); Tue Sep 2 17:51:37 BST 2003
>>>
>>> % ls -ld /bin
>>> lrwxr-xr-x 1 root system 7 Aug 22 2003 /bin@ ->
usr/bin/
>>>
>>> % ls -l /bin/sh
>>> -rwxr-xr-x 2 bin bin 149840 Apr 15 2003 /bin/sh*
>>>
>>> % df -h
>>> Filesystem Size Used Available Capacity
Mounted on
>>> /dev/disk/dsk0a 240M 208M 7666K 97% /
>>> /dev/disk/dsk0g 1923M 1335M 395M 78% /usr
>>
>>
>> Ok, question then.
>>
>> What will happen during boot, if partition /usr fails the
>> initial filecheck? It can not be mounted, it has to be
>> repaired first; but the system can not drop you into a
>> repair mode with a shell, because the shell resides in
>> /usr/bin/
>
> Unix admins do not normally create a separate partition for /usr.
Strange...we've done that at various Fortune 50 companies that I've
worked at.
> In Unix, it is a relatively static directory. Also, you
> need to kick the partition thing, it is an x86ism. Under
> AIX, there is a root logical volume. One could create
> separate LVs for /tmp, /var, and /home.
But AIX is full of all sorts of weirdness ported over from
their mainframe systems, especially their god-forsaken "stanza"
format replacements for such things as /etc/fstab (/etc/vfstab
in HP-UX) for no other reason than to make AIX feel "familiar"
to people used to administrating mainframes.
> Under Solaris,
> it is slices, and one could create a separate slice for
Slices are just another name for partitions...sheesh!
> /usr and /home, under the default setup.
>
> If you cannot mount /usr, then you get a mount failure.
> Depending on the machine, one could a console message,
> or one just get to read the numbers on an RS6000. To
> correct problems, I can always boot into the firmware.
>>
>> What does that unix do? Does it mount /usr readonly?
> The boot halts.
> Under ForPro (another version of Unix for those who
> remember Fortune Systems), the solution was that
> /usr/bin had a minimum set of utilities.
That method is sane, at least.
> Of course, the mount of another "partition" on /usr
> meant then overlaid those utilities.
>
> Anyway, discussion of Unix is OT.
only somewhat.
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