Storage space partition

[Bob McClure Jr]

On Fri, Apr 14, 2006 at 04:09:41PM -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 4:03 PM
> To: Getting started with Red Hat Linux
> Subject: Re: Storage space partition
> 
> > > > > <much snippage>
> > > > > 
> > > 
> > > 
> > 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
> 
> Okay, I somewhat expected that.  Your SAN appears to be showing your
> machine multiple variants of the same device.  I don't know what your
> SAN hardware is, but my sole experience is with HP's MSA-1500 with
> MSA-20 and MSA-30 shelves.  On it, we had to go into "Selective
> Storage Presentation" to keep linux from seeing 16 or more devices,
> most of which were bogus.  Otherwise, every time you run "vgscan" or
> anything related, it's going to see multiple instances of the real
> virtual (?) disk.
> 
> Once you get that sorted out, I'd run pvcreate on the partition,
> /dev/sdb1, rather than the whole drive /dev/sdb.
> 
> 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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> 
> If I run pvremove it should put it back to the original state correct?

Yes, I think so.

> Here is the output of the test run 
> 
> [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 cache

You know you're using the "-t" option to test only.  But, yes, other
than that, it should do The Right Thing.

Cheers,
-- 
Bob McClure, Jr.             Bobcat Open Systems, Inc.
bob at bobcatos.com             http://www.bobcatos.com
The best things in life aren't things.