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computers / comp.os.vms / Disk size in the virtual world

SubjectAuthor
* Disk size in the virtual worldArne Vajhøj
`* Re: Disk size in the virtual worldVolker Halle
 `* Re: Disk size in the virtual worldArne Vajhøj
  +* Re: Disk size in the virtual worldScott Dorsey
  |`* Re: Disk size in the virtual worldArne Vajhøj
  | `- Re: Disk size in the virtual worldScott Dorsey
  `* Re: Disk size in the virtual worldVolker Halle
   `* Re: Disk size in the virtual worldChris Townley
    `* Re: Disk size in the virtual worldArne Vajhøj
     `- Re: Disk size in the virtual worldChris Townley

1
Disk size in the virtual world

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From: arne@vajhoej.dk (Arne Vajhøj)
Newsgroups: comp.os.vms
Subject: Disk size in the virtual world
Date: Fri, 23 Feb 2024 22:19:37 -0500
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 by: Arne Vajhøj - Sat, 24 Feb 2024 03:19 UTC

So I tried to increase the size of a virtual disk
from 20 GB to 30 GB.

And I ended up with:

Total blocks 62914560
Logical Volume Size 41943040

Which is really rather logical. The file system
was created for 20 GB. But obviously not what I want.

I assume that backup + init + restore will fix it,
but are there any easier way of doing it?

ODS-5 on VMS 9.2-2 on VMWare Player if it matters.

Arne

Re: Disk size in the virtual world

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From: volker_halle@hotmail.com (Volker Halle)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
Date: Sat, 24 Feb 2024 07:06:59 +0100
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In-Reply-To: <urbn8a$109l5$1@dont-email.me>
 by: Volker Halle - Sat, 24 Feb 2024 06:06 UTC

Am 24.02.2024 um 04:19 schrieb Arne Vajhøj:
> So I tried to increase the size of a virtual disk
> from 20 GB to 30 GB.
>
> And I ended up with:
>
> Total blocks            62914560
> Logical Volume Size     41943040
>
> Which is really rather logical. The file system
> was created for 20 GB. But obviously not what I want.
>
> I assume that backup + init + restore will fix it,
> but are there any easier way of doing it?
>
> ODS-5 on VMS 9.2-2 on VMWare Player if it matters.
>
> Arne
>
>
Arne,

after the appropriate preparation, an OpenVMS volume can be extended
dynamically (it's called DVE = Dynamic Volume Expansion).

First check the volume expansion limit with

$ SHOW DEV/FUL DKAx:
....
Logical Volume Size nnn Expansion Size Limit nnn

If your desired new volume size is less than the Expansion Size Limit,
you can simply extend the disk online with:

$ SET VOLUME/SIZE DKAx:

If the current Expansion Size Limit is too small, you need to increase
it. This can ONLY be done while the disk is mounted privately:

$ SET VOLUME/LIMIT DKAx:

You can then re-mount the disk system-wide and actually extend it with
SET VOLUME/SIZE DKAx:

Volker.

PS: copied from my answer in ITRC back from 2006 ;-)
https://community.hpe.com/t5/operating-system-openvms/expanding-extending-eva-volume-on-openvms/td-p/3823829

Re: Disk size in the virtual world

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From: arne@vajhoej.dk (Arne Vajhøj)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
Date: Sat, 24 Feb 2024 07:57:15 -0500
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In-Reply-To: <urc124$12001$1@dont-email.me>
 by: Arne Vajhøj - Sat, 24 Feb 2024 12:57 UTC

On 2/24/2024 1:06 AM, Volker Halle wrote:
> Am 24.02.2024 um 04:19 schrieb Arne Vajhøj:
>> So I tried to increase the size of a virtual disk
>> from 20 GB to 30 GB.
>>
>> And I ended up with:
>>
>> Total blocks            62914560
>> Logical Volume Size     41943040
>>
>> Which is really rather logical. The file system
>> was created for 20 GB. But obviously not what I want.
>>
>> I assume that backup + init + restore will fix it,
>> but are there any easier way of doing it?
>>
>> ODS-5 on VMS 9.2-2 on VMWare Player if it matters.

> after the appropriate preparation, an OpenVMS volume can be extended
> dynamically (it's called DVE = Dynamic Volume Expansion).
>
> First check the volume expansion limit with
>
> $ SHOW DEV/FUL DKAx:
> ...
> Logical Volume Size nnn Expansion Size Limit nnn
>
> If your desired new volume size is less than the Expansion Size Limit,
> you can simply extend the disk online with:
>
> $ SET VOLUME/SIZE DKAx:
>
> If the current Expansion Size Limit is too small, you need to increase
> it. This can ONLY be done while the disk is mounted privately:
>
> $ SET VOLUME/LIMIT DKAx:
>
> You can then re-mount the disk system-wide and actually extend it with
> SET VOLUME/SIZE DKAx:

> PS: copied from my answer in ITRC back from 2006 ;-)
> https://community.hpe.com/t5/operating-system-openvms/expanding-extending-eva-volume-on-openvms/td-p/3823829

Worked perfectly. Thanks.

I wonder when this was added to VMS.

It is not relevant for physical disks. But it must have
turned relevant when SAN's were introduced.

Arne

Re: Disk size in the virtual world

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From: kludge@panix.com (Scott Dorsey)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
Date: 24 Feb 2024 13:24:23 -0000
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 by: Scott Dorsey - Sat, 24 Feb 2024 13:24 UTC

=?UTF-8?Q?Arne_Vajh=C3=B8j?= <arne@vajhoej.dk> wrote:
>
>I wonder when this was added to VMS.
>
>It is not relevant for physical disks. But it must have
>turned relevant when SAN's were introduced.

It is very relevant to physical disks. You install a new bigger disk, and
you copy the fileystem over and expand it once it's copied over. This is
much, much faster than doing a file-by-file copy.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Re: Disk size in the virtual world

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From: arne@vajhoej.dk (Arne Vajhøj)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
Date: Sat, 24 Feb 2024 08:30:22 -0500
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 by: Arne Vajhøj - Sat, 24 Feb 2024 13:30 UTC

On 2/24/2024 8:24 AM, Scott Dorsey wrote:
> =?UTF-8?Q?Arne_Vajh=C3=B8j?= <arne@vajhoej.dk> wrote:
>> I wonder when this was added to VMS.
>>
>> It is not relevant for physical disks. But it must have
>> turned relevant when SAN's were introduced.
>
> It is very relevant to physical disks. You install a new bigger disk, and
> you copy the fileystem over and expand it once it's copied over. This is
> much, much faster than doing a file-by-file copy.

"copy filesystem" is that BACKUP/PHYS or?

Arne

Re: Disk size in the virtual world

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From: volker_halle@hotmail.com (Volker Halle)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
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 by: Volker Halle - Sat, 24 Feb 2024 14:27 UTC

Am 24.02.2024 um 13:57 schrieb Arne Vajhøj:

> I wonder when this was added to VMS.

Dynamic volume expansion (DVE) feature introduced in OpenVMS Alpha
Version 7.3–2

Volker.

Re: Disk size in the virtual world

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From: kludge@panix.com (Scott Dorsey)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
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 by: Scott Dorsey - Sat, 24 Feb 2024 16:17 UTC

=?UTF-8?Q?Arne_Vajh=C3=B8j?= <arne@vajhoej.dk> wrote:
>On 2/24/2024 8:24 AM, Scott Dorsey wrote:
>> =?UTF-8?Q?Arne_Vajh=C3=B8j?= <arne@vajhoej.dk> wrote:
>>> I wonder when this was added to VMS.
>>>
>>> It is not relevant for physical disks. But it must have
>>> turned relevant when SAN's were introduced.
>>
>> It is very relevant to physical disks. You install a new bigger disk, and
>> you copy the fileystem over and expand it once it's copied over. This is
>> much, much faster than doing a file-by-file copy.
>
>"copy filesystem" is that BACKUP/PHYS or?

Yes, or a DD equivalent. Or using Clonezilla (which doesn't know anything
about the VMS filesystem so will just do a dd).
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Re: Disk size in the virtual world

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From: news@cct-net.co.uk (Chris Townley)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
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 by: Chris Townley - Sun, 25 Feb 2024 14:20 UTC

On 24/02/2024 14:27, Volker Halle wrote:
> Am 24.02.2024 um 13:57 schrieb Arne Vajhøj:
>
>> I wonder when this was added to VMS.
>
> Dynamic volume expansion (DVE) feature introduced in OpenVMS Alpha
> Version 7.3–2
>
> Volker.
>

Can this be used on a system disc on KVM/QEMU?
Presumably after expanding the filesystem, I would need to from the
install image, go to DCL to then do the extension

--
Chris

Re: Disk size in the virtual world

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From: arne@vajhoej.dk (Arne Vajhøj)
Newsgroups: comp.os.vms
Subject: Re: Disk size in the virtual world
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 by: Arne Vajhøj - Sun, 25 Feb 2024 15:00 UTC

On 2/25/2024 9:20 AM, Chris Townley wrote:
> On 24/02/2024 14:27, Volker Halle wrote:
>> Am 24.02.2024 um 13:57 schrieb Arne Vajhøj:
>>> I wonder when this was added to VMS.
>>
>> Dynamic volume expansion (DVE) feature introduced in OpenVMS Alpha
>> Version 7.3–2
>
> Can this be used on a system disc on KVM/QEMU?
> Presumably after expanding the filesystem, I would need to from the
> install image, go to DCL to then do the extension

I did it on the system disk after booting from it.

The PC did not explode.

Arne

Re: Disk size in the virtual world

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Subject: Re: Disk size in the virtual world
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 by: Chris Townley - Sun, 25 Feb 2024 19:28 UTC

On 25/02/2024 15:00, Arne Vajhøj wrote:
> On 2/25/2024 9:20 AM, Chris Townley wrote:
>> On 24/02/2024 14:27, Volker Halle wrote:
>>> Am 24.02.2024 um 13:57 schrieb Arne Vajhøj:
>>>> I wonder when this was added to VMS.
>>>
>>> Dynamic volume expansion (DVE) feature introduced in OpenVMS Alpha
>>> Version 7.3–2
>>
>> Can this be used on a system disc on KVM/QEMU?
>> Presumably after expanding the filesystem, I would need to from the
>> install image, go to DCL to then do the extension
>
> I did it on the system disk after booting from it.
>
> The PC did not explode.
>
> Arne
>
>
That all worked nicely - thanks

--
Chris

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