[linux-lvm] FW: Logical Volume Manager

[linux-lvm] FW: Logical Volume Manager

[Montgomery Mouw]

-----Original Message-----
From: CLIVE TARLING, BLOOMBERG/ LONDON OF
[mailto:CTARLING@bloomberg.net]
Sent: Monday, August 05, 2002 11:10 AM
To: INFO@SISTINA.COM
Subject: Logical Volume Manager


Hi There,
          I wonder if you can help me please, I want to setup a 11TB single
volume under Redhat Linux 7.3 but LVM appears to only support 300GB is it
possible for it to support 11TB.
Regards
Clive Tarling.

Re: [linux-lvm] FW: Logical Volume Manager

[José Luis Domingo López]

On Monday, 05 August 2002, at 12:17:47 -0500,
Montgomery Mouw wrote:

> Hi There,
>           I wonder if you can help me please, I want to setup a 11TB single
> volume under Redhat Linux 7.3 but LVM appears to only support 300GB is it
> possible for it to support 11TB.
> 

With the default settings (PE size of 4 MB) there is a limit of 256 GB
per LV in current LVM versions (1.x series). For such a large LV choose
a larger PE size at vgcreate time. From its manual page:

       -s, --physicalextentsize PhysicalExtentSize[kKmMgGtT]
              Sets  the  physical extent size on physical volumes
              of this volume group.  A size suffix (k  for  kilo
              bytes up to t for terabytes) is optional, megabytes
              is the default if no suffix is present.  Values can
              be  from  8 KB to 16 GB in powers of 2. The default
              of 4 MB causes maximum LV sizes of  ~256GB  because
              as  many  as  ~64k extents are supported per LV. In
              case larger maximum LV sizes  are  needed  (later),
              you  need  to  set the PE size to a larger value as
              well. Later changes of the PE size in  an  existing
              VG are not supported.


Regards,

-- 
Jose Luis Domingo Lopez
Linux Registered User #189436     Debian Linux Woody (Linux 2.4.19-pre6aa1)

Re: [linux-lvm] FW: Logical Volume Manager

[Ragnar Kjørstad]

On Mon, Aug 05, 2002 at 08:22:25PM +0200, José Luis Domingo López wrote:
> On Monday, 05 August 2002, at 12:17:47 -0500,
> 
> > Hi There,
> >           I wonder if you can help me please, I want to setup a 11TB single
> > volume under Redhat Linux 7.3 but LVM appears to only support 300GB is it
> > possible for it to support 11TB.
> > 
> 
> With the default settings (PE size of 4 MB) there is a limit of 256 GB
> per LV in current LVM versions (1.x series). For such a large LV choose
> a larger PE size at vgcreate time. From its manual page:

Even with a larger PE-size the maximum lv-size is 2TB.
Hopefully it will change soon.


-- 
Ragnar Kjørstad
Big Storage.

Re: [linux-lvm] FW: Logical Volume Manager

[lembark]

>> >           I wonder if you can help me please, I want to setup a 11TB single
>> > volume under Redhat Linux 7.3 but LVM appears to only support 300GB is it
>> > possible for it to support 11TB.

Better question might by why you'd want to set up an 11TB
file system in the first place. Anything this size will be
hell to manage.

What is going on the file system?

--
Steven Lembark                              2930 W. Palmer
Workhorse Computing                      Chicago, IL 60647
                                           +1 800 762 1582