Storage space partition
Nair, Murlidharan T
mnair at iusb.edu
Fri Apr 14 19:46:03 UTC 2006
-----Original Message-----
From: redhat-install-list-bounces at redhat.com
[mailto:redhat-install-list-bounces at redhat.com] On Behalf Of Bob McClure
Jr
Sent: Friday, April 14, 2006 3:43 PM
To: Getting started with Red Hat Linux
Subject: Re: Storage space partition
On Fri, Apr 14, 2006 at 03:33:47PM -0400, Nair, Murlidharan T wrote:
>
>
> -----Original Message-----
> From: redhat-install-list-bounces at redhat.com
> [mailto:redhat-install-list-bounces at redhat.com] On Behalf Of Bob
McClure
> Jr
> Sent: Friday, April 14, 2006 3:06 PM
> To: Getting started with Red Hat Linux
> Subject: Re: Storage space partition
>
> On Fri, Apr 14, 2006 at 02:44:35PM -0400, Nair, Murlidharan T wrote:
> >
> >
> > -----Original Message-----
> > From: redhat-install-list-bounces at redhat.com
> > [mailto:redhat-install-list-bounces at redhat.com] On Behalf Of Bob
> McClure
> > Jr
> > Sent: Friday, April 14, 2006 1:17 PM
> > To: Getting started with Red Hat Linux
> > Subject: Re: Storage space partition
> >
> > On Fri, Apr 14, 2006 at 11:46:24AM -0400, Nair, Murlidharan T wrote:
> > >
> > > <much snippage>
> > >
>
> > [root at bioinformatics ~]# pvcreate /dev/emcpowera
> > Physical volume "/dev/emcpowera" successfully created
> >
> > [root at bioinformatics ~]# vgcreate bio01VG /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Volume group "bio01VG" successfully created
>
> Okay, now I'm not sure what is going on. It is more common for linux
> to identify the drives as /dev/sda, /dev/sdb, etc. rather than
> /dev/emcpowera. What might be more useful would be to run
>
> fdisk -l # That's ell as in list.
>
> and see what drives show up. Is it possible that /dev/emcpowera is
> the physical SAN disk(s) and that /dev/sdb and /dev/sdc are the
> virtual disks created by the SAN? If so, the latter should be
> partitioned and pvcreated.
>
> Also note that you created the partition and then ignored it. Had you
> used the partition, it would have been called /dev/emcpowera1 when you
> ran pvcreate.
>
> Rick Stevens, feel free to jump in here. I'm operating from very
> recent and limited experience with a SAN.
>
> > [root at bioinformatics ~]# vgdisplay bio01VG
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Volume group "bio01VG" doesn't exist
> >
> > [root at bioinformatics ~]# vgchange -a y bio01VG
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdb
> > not /dev/emcpowera
> > Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using
/dev/sdc
> > not /dev/emcpowera
> > Unable to find volume group "bio01VG"
>
>
> I just noticed that the partition it created was called emcpowera1.
Here
> is part of the output
> ========================================================
> Disk /dev/emcpowera: 700.0 GB, 700079669248 bytes
> 255 heads, 63 sectors/track, 85113 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/emcpowera1 1 85113 683670141 8e Linux
LVM
>
> Command (m for help): w
> The partition table has been altered!
>
> Calling ioctl() to re-read partition table.
> Syncing disks.
> ========================================================
> I assumed that it would create the partition with the same name so
when
> I did a pvcreate I used
> pvcreate /dev/emcpowera
>
> I am thinking of doing a pvremove I ran the test here is what I got
> ==================================================================
> [root at bioinformatics /]# pvremove -t -v /dev/emcpowera
> Test mode: Metadata will NOT be updated.
> /dev/cdrom: open failed: Read-only file system
> Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using /dev/sdb
> not /dev/emcpowera
> Found duplicate PV XKollgX4GsBzbFyJsK13JS62S3P4b0Vr: using /dev/sdc
> not /dev/emcpowera
> Labels on physical volume "/dev/emcpowera" successfully wiped
> Test mode: Wiping internal cach
> ==================================================================
> Then I can start back with pvcreate correct? Also will there be any
> consequences of running vgcreate on /dev/emcpowera that used dev/sbd ?
> If so how can I fix it?
>
> Thanks for your time ../Murli
Did you run "fdisk -l"? I wanted to see if /dev/sdb or /dev/sdc
showed up. If either sdb or sdc are synonyms for emcpowera, it would
be better to use it/them just because it's more customary and will
result in fewer surprises.
Cheers,
--
Bob McClure, Jr. Bobcat Open Systems, Inc.
bob at bobcatos.com http://www.bobcatos.com
The best things in life aren't things.
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Here is the output of fdisk -l
Disk /dev/sda: 36.3 GB, 36364615680 bytes
64 heads, 32 sectors/track, 34680 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 31 31728 de Dell Utility
/dev/sda2 32 7748 7902208 83 Linux
/dev/sda3 * 7749 7848 102400 83 Linux
/dev/sda4 7849 34680 27475968 5 Extended
/dev/sda5 7849 8872 1048560 83 Linux
/dev/sda6 8873 10920 2097136 82 Linux swap
/dev/sda7 10921 14925 4101104 83 Linux
/dev/sda8 14926 19915 5109744 83 Linux
/dev/sda9 19916 34630 15068144 83 Linux
Disk /dev/sdb: 700.0 GB, 700079669248 bytes
255 heads, 63 sectors/track, 85113 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 85113 683670141 8e Linux LVM
Disk /dev/sdc: 700.0 GB, 700079669248 bytes
255 heads, 63 sectors/track, 85113 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 85113 683670141 8e Linux LVM
Disk /dev/emcpowera: 700.0 GB, 700079669248 bytes
255 heads, 63 sectors/track, 85113 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/emcpowera1 1 85113 683670141 8e Linux LVM
Cheers ../Murli
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