Re: labeling a disk on AIX 5L / disk cmds

From: Nicholas Dronen (ndronen_at_io.frii.com)
Date: 08/07/03 

Date: 07 Aug 2003 00:18:35 GMT

Matthias <matthias@blankenhaus.com> wrote:
M> Nicholas Dronen <ndronen@io.frii.com> wrote in message
>> M> - label disk devices
>>
>> That gets added to the VGDA when you add a disk to a volume
>> group, which you have to do before you put a JFS filesystem
>> on it.
M> In other words there is no separate cmd to just label a disk ?

Why would you *want* to label a disk?

>> # extendvg
>>
>> M> - partition disks
>>
M> I saw phys. partition and logical partitions. It appears that
M> conceptually AIX logical volumes are what partions are on other
M> UNIX systems like Solaris or Linux. Is that correct?

It may be similar to a virgin partition in Linux or Solaris --
say, as a range or set of ranges of blocks on a disk -- but
a logical volume can span physical volumes and be expanded
dynamically.

M> If so what do I need phys. partioning than for?

A physical partition is more or less just a set of disk blocks.
More than one logical partition can correspond to a physical
partition. A given physical partition in a mirrored logical
volume has *two* logical partitions, one in each mirror.

In the end, you'll be better off not trying to think of any LVM in
terms of the PC-like native disk subsystems of Solaris or Linux.
They ain't the same.

Regards,

Nicholas 

-- 
"Why shouldn't I top-post?"    http://www.aglami.com/tpfaq.html
"Meanings are another story."  http://www.ifas.org/wa/glossolalia.html

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