Bug 166762 - Installer chooses misleading names for logical volumes
Installer chooses misleading names for logical volumes
Product: Fedora
Classification: Fedora
Component: anaconda (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Anaconda Maintenance Team
: FutureFeature
Depends On:
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Reported: 2005-08-25 09:08 EDT by Warwick Brown
Modified: 2008-06-26 06:51 EDT (History)
0 users

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Doc Type: Enhancement
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Last Closed: 2008-06-23 14:28:59 EDT
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Description Warwick Brown 2005-08-25 09:08:37 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)

Description of problem:
Anaconda installer chooses misleading names for logical volumes, resuling in names like

/dev/VolGroup00/LogVol01 which maps to /dev/mapper/VolGroup00-LogVol01

The use of the name LogVol suggests that it is a log volume, not a logical volume.

I suspect that this will cause confusion for people who administer other unixes as well as FC4.

The initials pv, vg, and lv are much more appropriate, 

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Install FC4 using all defaults

Actual Results:  Ended up with misleading device names

Expected Results:  It would have been nice to have the following:

/dev/vg00/lv00 (/dev/mapper/vg00-lv00)


/dev/rootvg/rootlv (/dev/mapper/rootvg-rootlv)

Additional info:
Comment 1 Christian Iseli 2007-01-22 05:27:05 EST
This report targets the FC3 or FC4 products, which have now been EOL'd.

Could you please check that it still applies to a current Fedora release, and
either update the target product or close it ?

Comment 2 Red Hat Bugzilla 2007-06-11 22:54:38 EDT
requested by Jams Antill
Comment 3 xunilarodef 2008-03-24 02:28:06 EDT
(In reply to comment #1)
> This report targets the FC3 or FC4 products, which have now been EOL'd.
> Could you please check that it still applies to a current Fedora release, and
> either update the target product or close it ?

  The naming convention described above is still in use in rawhide as of today
(early F9 vintage).  The Version field seems correct as "rawhide", nothing to
update there.  Just stating the obvious to kick this out of NEEDINFO.

Comment 4 Chris Lumens 2008-06-23 14:28:59 EDT
I have never heard of anyone thinking LogVol referred to a volume full of logs
instead of a logical volume.  Anyone halfway familiar with the technology should
know what it means, and newcomers should be able to figure it out - after all,
"logical" is even in the name.
Comment 5 Warwick Brown 2008-06-26 06:51:16 EDT

I believe you have not supported Linux LVM alongside other UNIX LVM technologies
(like AIX LVM, Solaris SDM, Veritas, etc) - what would you know about being
"half-familiar" with LVM?

Here's an excerpt from an AIX rootvg:

[root@xxxx] # lsvg -l rootvg
LV NAME             TYPE       LPs   PPs   PVs  LV STATE      MOUNT POINT
hd5                 boot       1     2     2    closed/syncd  N/A
hd6                 paging     128   256   2    open/syncd    N/A
hd8                 jfs2log    1     2     2    open/syncd    N/A
hd4                 jfs2       1     2     2    open/syncd    /
hd2                 jfs2       19    38    2    open/syncd    /usr
hd9var              jfs2       8     16    2    open/syncd    /var
hd3                 jfs2       8     16    2    open/syncd    /tmp
hd1                 jfs2       1     2     2    open/syncd    /home
hd10opt             jfs2       24    48    2    open/syncd    /opt
fwdump              jfs2       3     6     2    open/syncd    /var/adm/ras/platform
lg_dumplv           sysdump    8     16    2    open/syncd    N/A
auditlv             jfs2       1     2     2    closed/syncd  /audit
mksysblv            jfs2       40    80    2    open/syncd    /local/mksysb
loglv02             jfslog     1     1     1    closed/syncd  N/A
[root@xxxx] #

Please note the default use of loglvXX for JFS journal log volumes, used instead
of in-line logs, found on many a newer journalled filesystem.

The point that I was trying to make was that the use of LogVol had different
meanings within the LVM world. Any filesystem which employs journalling will
have a journal log, which is either kept in-line on the same logical volume or
on a separate volume, called a "LogVol"ume.

Please review some LINUX journalled filesystem mkfs commands, such as
mkreiserfs' -j option, and mke2fs' -O option to specify a separate log volume
for performance reasons.

I suggest the annotation of "lv" should be used for logical volumes, rather than
"logvol", which would then allow Fedora/Linux LVM to be synonymous with almost
every other LVM implementation in use.

It's not our job to re-invent the wheel, but it helps if it's kept round in
shape, like all other wheels, so everyone knows what the wheel is and what it
looks like.

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