[linux-lvm] Beginner Questions

[linux-lvm] Beginner Questions

[Joseph L. Casale]

[-- Attachment #1: Type: text/plain, Size: 1124 bytes --]

Hi,
I have Fedora Core 7 with  LVM version: 2.02.24 (2007-03-19), Library version: 1.02.17 (2007-01-29) and  Driver version: 4.11.0 setup.

I have two hardware raid cards each with one array partitioned fully at 799.9GB and 1499.9GB. When I try run to pvcreate /dev/sdb1 /dev/sdc1 it creates the pvs and when I run pvdisplay I get this:

  --- Physical volume ---
  PV Name               /dev/sdb1
  VG Name               name
  PV Size               745.00 GB / not usable 3.67 MB
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              190718
  Free PE               190718
  Allocated PE          0
  PV UUID               yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk

  --- Physical volume ---
  PV Name               /dev/sdc1
  VG Name               name
  PV Size               1024.00 GB / not usable 8192.00 EB
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              357626
  Free PE               357626
  Allocated PE          0
  PV UUID               PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm

Why is some space "not usable"?

Thanks!
jlc

[-- Attachment #2: Type: text/html, Size: 4942 bytes --]

RE: [linux-lvm] Beginner Questions

[pham_cuong]

[-- Attachment #1: Type: text/plain, Size: 2405 bytes --]

When you format, unless you specify the block size, the default block
size is used.
The default block size is defined based on the size of the logical disk
(partition) size that you've created.
Any disk space left over from the format is listed as unusable (for the
block size that's being used) can not be used because it's not a
multiple of the block size used to format that logical drive/partition.
 
The only way that you can make use of the remaining very small disk
space is to use the smaller block size when formatting.   However,
unless you know exactly what you're doing, it's not advisable for you to
do so since this will more likely impact the performance of your logical
drive/partition.  A lot of testing were done to determine the optimal
block size based on the size of the logical drive/partition that you've
created.
 
Except for academic reason(s), you should not be concerned with such a
small left over.
 
Regards,
 

________________________________

From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com]
On Behalf Of Joseph L. Casale
Sent: Monday, November 12, 2007 4:34 PM
To: 'linux-lvm@redhat.com'
Subject: [linux-lvm] Beginner Questions



Hi,
I have Fedora Core 7 with  LVM version: 2.02.24 (2007-03-19), Library
version: 1.02.17 (2007-01-29) and  Driver version: 4.11.0 setup.

I have two hardware raid cards each with one array partitioned fully at
799.9GB and 1499.9GB. When I try run to pvcreate /dev/sdb1 /dev/sdc1 it
creates the pvs and when I run pvdisplay I get this:

 

  --- Physical volume ---

  PV Name               /dev/sdb1

  VG Name               name

  PV Size               745.00 GB / not usable 3.67 MB

  Allocatable           yes

  PE Size (KByte)       4096

  Total PE              190718

  Free PE               190718

  Allocated PE          0

  PV UUID               yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk

 

  --- Physical volume ---

  PV Name               /dev/sdc1

  VG Name               name

  PV Size               1024.00 GB / not usable 8192.00 EB

  Allocatable           yes

  PE Size (KByte)       4096

  Total PE              357626

  Free PE               357626

  Allocated PE          0

  PV UUID               PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm

 

Why is some space "not usable"?

 

Thanks!
jlc


[-- Attachment #2: Type: text/html, Size: 7701 bytes --]

Re: [linux-lvm] Beginner Questions

[Alasdair G Kergon]

On Mon, Nov 12, 2007 at 02:33:58PM -0700, Joseph L. Casale wrote:
>   PV Size               745.00 GB / not usable 3.67 MB
>   PV Size               1024.00 GB / not usable 8192.00 EB
 
> Why is some space "not usable"?
 
Some space is used for LVM metadata; other space is lost as the
remainder when the volume size is divided by the chosen extent size.

Ignore the ridiculous number there - it's been fixed in CVS for the next
release.

Alasdair
-- 
agk@redhat.com

RE: [linux-lvm] Beginner Questions

[Joseph L. Casale]

[-- Attachment #1: Type: text/plain, Size: 2718 bytes --]

Thank you for the response. The first is insignificant, but there is ½ a terabyte missing on the second which is listed as 8192 EB? It should be ~500 GB free?

Thanks!
jlc

From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of pham_cuong@emc.com
Sent: Monday, November 12, 2007 2:56 PM
To: linux-lvm@redhat.com
Subject: RE: [linux-lvm] Beginner Questions

When you format, unless you specify the block size, the default block size is used.
The default block size is defined based on the size of the logical disk (partition) size that you've created.
Any disk space left over from the format is listed as unusable (for the block size that's being used) can not be used because it's not a multiple of the block size used to format that logical drive/partition.

The only way that you can make use of the remaining very small disk space is to use the smaller block size when formatting.   However, unless you know exactly what you're doing, it's not advisable for you to do so since this will more likely impact the performance of your logical drive/partition.  A lot of testing were done to determine the optimal block size based on the size of the logical drive/partition that you've created.

Except for academic reason(s), you should not be concerned with such a small left over.

Regards,


________________________________
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of Joseph L. Casale
Sent: Monday, November 12, 2007 4:34 PM
To: 'linux-lvm@redhat.com'
Subject: [linux-lvm] Beginner Questions
Hi,
I have Fedora Core 7 with  LVM version: 2.02.24 (2007-03-19), Library version: 1.02.17 (2007-01-29) and  Driver version: 4.11.0 setup.

I have two hardware raid cards each with one array partitioned fully at 799.9GB and 1499.9GB. When I try run to pvcreate /dev/sdb1 /dev/sdc1 it creates the pvs and when I run pvdisplay I get this:

  --- Physical volume ---
  PV Name               /dev/sdb1
  VG Name               name
  PV Size               745.00 GB / not usable 3.67 MB
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              190718
  Free PE               190718
  Allocated PE          0
  PV UUID               yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk

  --- Physical volume ---
  PV Name               /dev/sdc1
  VG Name               name
  PV Size               1024.00 GB / not usable 8192.00 EB
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              357626
  Free PE               357626
  Allocated PE          0
  PV UUID               PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm

Why is some space "not usable"?

Thanks!
jlc

[-- Attachment #2: Type: text/html, Size: 9909 bytes --]

RE: [linux-lvm] Beginner Questions

[Joseph L. Casale]

Thanks Alasdair, but where did the ~475 GB's go on the second? Is there some limit on PV size, I can't find anything with Google (Not that I can see 1024GB being a likely figure).

Thanks!
jlc

-----Original Message-----
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of Alasdair G Kergon
Sent: Monday, November 12, 2007 2:59 PM
To: LVM general discussion and development
Subject: Re: [linux-lvm] Beginner Questions

On Mon, Nov 12, 2007 at 02:33:58PM -0700, Joseph L. Casale wrote:
>   PV Size               745.00 GB / not usable 3.67 MB
>   PV Size               1024.00 GB / not usable 8192.00 EB

> Why is some space "not usable"?

Some space is used for LVM metadata; other space is lost as the
remainder when the volume size is divided by the chosen extent size.

Ignore the ridiculous number there - it's been fixed in CVS for the next
release.

Alasdair
--
agk@redhat.com

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] Beginner Questions

[Alasdair G Kergon]

On Mon, Nov 12, 2007 at 03:30:00PM -0700, Joseph L. Casale wrote:
> Thanks Alasdair, but where did the ~475 GB's go on the second? Is there some limit on PV size, I can't find anything with Google (Not that I can see 1024GB being a likely figure).
 
Post the output of:
  pvs -v

Alasdair
-- 
agk@redhat.com

RE: [linux-lvm] Beginner Questions

[Joseph L. Casale]

Pvs -v
  /dev/sdb1  iSCSI_dvr  lvm2 a-   744.99G 744.99G 745.00G yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk
  /dev/sdc1  iSCSI_dvr  lvm2 a-     1.36T   1.36T   1.36T PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm

Still baffling me is that fdisk -l shows:
Disk /dev/sdc: 1499.9 GB, 1499998453760 bytes
255 heads, 63 sectors/track, 182364 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      182364  1464838798+  8e  Linux LVM

And 1499.9 GB = ~1.46 terabytes

Thanks!
jlc


-----Original Message-----
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of Alasdair G Kergon
Sent: Monday, November 12, 2007 3:34 PM
To: LVM general discussion and development
Subject: Re: [linux-lvm] Beginner Questions

On Mon, Nov 12, 2007 at 03:30:00PM -0700, Joseph L. Casale wrote:
> Thanks Alasdair, but where did the ~475 GB's go on the second? Is there some limit on PV size, I can't find anything with Google (Not that I can see 1024GB being a likely figure).

Post the output of:
  pvs -v

Alasdair
--
agk@redhat.com

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] Beginner Questions

[Brian McCullough]

On Mon, Nov 12, 2007 at 03:48:27PM -0700, Joseph L. Casale wrote:
> Pvs -v
>   /dev/sdb1  iSCSI_dvr  lvm2 a-   744.99G 744.99G 745.00G yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk
>   /dev/sdc1  iSCSI_dvr  lvm2 a-     1.36T   1.36T   1.36T PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm
> 
> Still baffling me is that fdisk -l shows:
> Disk /dev/sdc: 1499.9 GB, 1499998453760 bytes
> 255 heads, 63 sectors/track, 182364 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdc1               1      182364  1464838798+  8e  Linux LVM
> 
> And 1499.9 GB = ~1.46 terabytes


This is an old, and easy, one to answer.  You will notice in your first
line of fdisk output, the 14xxx bytes value, which matches the "1499.9
GB" value just before it.

What you are seeing is the difference between GigaBytes that are made up
of 1000 * 1000 * 1000 and gigabytes that are made up of 1024 * 1024 *
1024 bytes.



Hope that helps,
Brian

Re: [linux-lvm] Beginner Questions

[Alasdair G Kergon]

On Mon, Nov 12, 2007 at 03:48:27PM -0700, Joseph L. Casale wrote:
>   /dev/sdb1  iSCSI_dvr  lvm2 a-   744.99G 744.99G 745.00G yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk
>   /dev/sdc1  iSCSI_dvr  lvm2 a-     1.36T   1.36T   1.36T PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm
> Disk /dev/sdc: 1499.9 GB, 1499998453760 bytes

This is what I see for a similar volume:

# pvs -v --units H
1.50T

# pvs -v --units h
1.36T

# pvs -v --units G
1500.00G

man page:

       --units hsbkmgtHKMGT
              All   sizes   are   output  in  these  units:  (h)uman-readable,
              (s)ectors,  (b)ytes,  (k)ilobytes,   (m)egabytes,   (g)igabytes,
              (t)erabytes.  Capitalise to use multiples of 1000 (S.I.) instead
              of 1024.  Can also specify custom (u)nits e.g.  --units 3M

Alasdair
-- 
agk@redhat.com

RE: [linux-lvm] Beginner Questions

[Joseph L. Casale]

Ok,
So when I do a pvdisplay and see "1024.00 GB / not usable 8192.00 EB" that is misreported on both sides of the /?

Thanks everyone for all the guidance!

jlc

-----Original Message-----
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of Alasdair G Kergon
Sent: Monday, November 12, 2007 4:00 PM
To: LVM general discussion and development
Subject: Re: [linux-lvm] Beginner Questions

On Mon, Nov 12, 2007 at 03:48:27PM -0700, Joseph L. Casale wrote:
>   /dev/sdb1  iSCSI_dvr  lvm2 a-   744.99G 744.99G 745.00G yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk
>   /dev/sdc1  iSCSI_dvr  lvm2 a-     1.36T   1.36T   1.36T PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm
> Disk /dev/sdc: 1499.9 GB, 1499998453760 bytes

This is what I see for a similar volume:

# pvs -v --units H
1.50T

# pvs -v --units h
1.36T

# pvs -v --units G
1500.00G

man page:

       --units hsbkmgtHKMGT
              All   sizes   are   output  in  these  units:  (h)uman-readable,
              (s)ectors,  (b)ytes,  (k)ilobytes,   (m)egabytes,   (g)igabytes,
              (t)erabytes.  Capitalise to use multiples of 1000 (S.I.) instead
              of 1024.  Can also specify custom (u)nits e.g.  --units 3M

Alasdair
--
agk@redhat.com

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

RE: [linux-lvm] Beginner Questions

[pham_cuong]

One last thing:

While your physical drive is said to be 1.5 GB, I think that is the
marketing GB (1E+30) and not engineering GB (2^30 Bytes).  Performing
the calculations using the info you've provided shows that there is
372.98 GB unaccounted for, not 500 GB as you've expected.

==========  ==========  ================================================
Block size	No blocks	                      Size		
==========  ==========  ================================================
  [KB]	  [KB]	    [KB]	          [MB]	        [GB]
==========  ==========  ================================================
 4,096 	 190,718 	 781,180,928 	 762,872.00 	 744.99 
 4,096 	 357,626 	 1,464,836,096 	 1,430,504.00 	 1,396.98 
==========  ==========  ================================================

(1396.98-1024) GB  = 372.98 GB.

-----Original Message-----
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com]
On Behalf Of Joseph L. Casale
Sent: Monday, November 12, 2007 6:29 PM
To: 'LVM general discussion and development'
Subject: RE: [linux-lvm] Beginner Questions

Ok,
So when I do a pvdisplay and see "1024.00 GB / not usable 8192.00 EB"
that is misreported on both sides of the /?

Thanks everyone for all the guidance!

jlc

-----Original Message-----
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com]
On Behalf Of Alasdair G Kergon
Sent: Monday, November 12, 2007 4:00 PM
To: LVM general discussion and development
Subject: Re: [linux-lvm] Beginner Questions

On Mon, Nov 12, 2007 at 03:48:27PM -0700, Joseph L. Casale wrote:
>   /dev/sdb1  iSCSI_dvr  lvm2 a-   744.99G 744.99G 745.00G
yQyVCe-tiS4-Ma1E-hilJ-niuG-KXL9-jkKVIk
>   /dev/sdc1  iSCSI_dvr  lvm2 a-     1.36T   1.36T   1.36T
PURHhY-Lo1T-5bif-HjGP-dP3o-NVTs-71ZKUm
> Disk /dev/sdc: 1499.9 GB, 1499998453760 bytes

This is what I see for a similar volume:

# pvs -v --units H
1.50T

# pvs -v --units h
1.36T

# pvs -v --units G
1500.00G

man page:

       --units hsbkmgtHKMGT
              All   sizes   are   output  in  these  units:
(h)uman-readable,
              (s)ectors,  (b)ytes,  (k)ilobytes,   (m)egabytes,
(g)igabytes,
              (t)erabytes.  Capitalise to use multiples of 1000 (S.I.)
instead
              of 1024.  Can also specify custom (u)nits e.g.  --units 3M

Alasdair
--
agk@redhat.com

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] Beginner Questions

[Dean S. Messing]

: One last thing:
: 
: While your physical drive is said to be 1.5 GB, I think that is the
: marketing GB (1E+30) and not engineering GB (2^30 Bytes).  Performing
^^^^^^^^^^^^^^^^^^^^^^

Those are _mighty_big_ Gigabytes!

[linux-lvm] beginner questions

[David Hansel]

Hi All,

I just wanna ask, how stable lvm in linux?
Thanks.

-- 
Best Regards,
David Hansel

RE: [linux-lvm] beginner questions

[Joseph L. Casale]

Despite being a beginner myself, I can assure you that logically it must be pretty good as every distribution I have used so far bases the entire install over it. As a result, it must be pretty solid :)

jlc

-----Original Message-----
From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of David Hansel
Sent: Tuesday, November 13, 2007 6:40 PM
To: linux-lvm@redhat.com
Subject: [linux-lvm] beginner questions

Hi All,

I just wanna ask, how stable lvm in linux?
Thanks.

--
Best Regards,
David Hansel

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] beginner questions

[malahal]

It depends on what you are looking for! If you do basic things, it works
great! If you do complex things, it may not work for you. :-)

Thanks, Malahal.

Joseph L. Casale [jcasale@ActiveNetwerx.com] wrote:
> Despite being a beginner myself, I can assure you that logically it must be pretty good as every distribution I have used so far bases the entire install over it. As a result, it must be pretty solid :)
> 
> jlc
> 
> -----Original Message-----
> From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of David Hansel
> Sent: Tuesday, November 13, 2007 6:40 PM
> To: linux-lvm@redhat.com
> Subject: [linux-lvm] beginner questions
> 
> Hi All,
> 
> I just wanna ask, how stable lvm in linux?
> Thanks.
> 
> --
> Best Regards,
> David Hansel

Re: [linux-lvm] beginner questions

[David Hansel]

Hello Malahal,

May i know how stable LVM in AIX 5.3?
I wanna try to make a snapshot of LV to make a backup. Is the
snapshot, mirroring features doing fine in AIX?

Pls adv. Thanks.

On Nov 14, 2007 10:32 AM,  <malahal@us.ibm.com> wrote:
> It depends on what you are looking for! If you do basic things, it works
> great! If you do complex things, it may not work for you. :-)
>
> Thanks, Malahal.
>
>
> Joseph L. Casale [jcasale@ActiveNetwerx.com] wrote:
> > Despite being a beginner myself, I can assure you that logically it must be pretty good as every distribution I have used so far bases the entire install over it. As a result, it must be pretty solid :)
> >
> > jlc
> >
> > -----Original Message-----
> > From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of David Hansel
> > Sent: Tuesday, November 13, 2007 6:40 PM
> > To: linux-lvm@redhat.com
> > Subject: [linux-lvm] beginner questions
> >
> > Hi All,
> >
> > I just wanna ask, how stable lvm in linux?
> > Thanks.
> >
> > --
> > Best Regards,
> > David Hansel
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>



-- 
Best Regards,
David Hansel

Re: [linux-lvm] beginner questions

[Bryan Whitehead]

This mailing list is for the Linux Volume Manager (LVM). You'll need
to look somewhere else to find AIX Logical Volume Management (LVM)
help.

On Nov 13, 2007 6:47 PM, David Hansel <hanselzen@gmail.com> wrote:
> Hello Malahal,
>
> May i know how stable LVM in AIX 5.3?
> I wanna try to make a snapshot of LV to make a backup. Is the
> snapshot, mirroring features doing fine in AIX?

Re: [linux-lvm] beginner questions

[Bryan Whitehead]

Now that I think about it... I think the LVM for Linux is called
Logical Volume Manager?

It has been so long since I've had to read the docs...

Anyway, I don't think the LVM on AIX and LVM in Linux are similar
enough to get the answers you are looking for.

On Nov 14, 2007 12:54 AM, Bryan Whitehead <driver@megahappy.net> wrote:
> This mailing list is for the Linux Volume Manager (LVM). You'll need
> to look somewhere else to find AIX Logical Volume Management (LVM)
> help.

Re: [linux-lvm] beginner questions

[David Hansel]

Thank you then.. i thought AIX using the similar LVM with Linux.

On Nov 14, 2007 4:57 PM, Bryan Whitehead <driver@megahappy.net> wrote:
> Now that I think about it... I think the LVM for Linux is called
> Logical Volume Manager?
>
> It has been so long since I've had to read the docs...
>
> Anyway, I don't think the LVM on AIX and LVM in Linux are similar
> enough to get the answers you are looking for.
>
> On Nov 14, 2007 12:54 AM, Bryan Whitehead <driver@megahappy.net> wrote:
> > This mailing list is for the Linux Volume Manager (LVM). You'll need
> > to look somewhere else to find AIX Logical Volume Management (LVM)
> > help.
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>



-- 
Best Regards,
David Hansel

Re: [linux-lvm] beginner questions

[Stuart D. Gathman]

On Wed, 14 Nov 2007, David Hansel wrote:

> May i know how stable LVM in AIX 5.3?

This is the linux LVM group, but I can assure you that LVM in AIX 4.3
is *very* stable.  You'll have to ask in an AIX group, but I suspect that
it is still very good.  As far as I'm concerned, AIX LVM is the one to 
beat for open source LVM.

> I wanna try to make a snapshot of LV to make a backup. Is the
> snapshot, mirroring features doing fine in AIX?

AIX 4.3 LVM didn't support snapshot, but mirroring (and striping) worked great,
(and are still working great).

Linux LVM got snapshots before mirroring/striping.  This was sensible because
mirroring/striping is available via the linux 'md' driver - albeit somewhat
kludgy compared to LE based LVM support.

-- 
	      Stuart D. Gathman <stuart@bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

Re: [linux-lvm] beginner questions

[David Brown]

On Wed, Nov 14, 2007 at 05:41:54PM +0800, David Hansel wrote:

>Thank you then.. i thought AIX using the similar LVM with Linux.

They probably have some similarities, since IBM worked some on the linux
LVM code, and they solve the same problem.

But, not really enough similarity for anyone here to know much about AIX
stability.

Dave