mirror of
https://github.com/QubesOS/qubes-doc.git
synced 2024-12-29 01:06:24 -05:00
73 lines
3.2 KiB
Markdown
73 lines
3.2 KiB
Markdown
---
|
|
layout: doc
|
|
title: Secondary Storage
|
|
permalink: /doc/secondary-storage/
|
|
redirect_from:
|
|
- /en/doc/secondary-storage/
|
|
- /doc/SecondaryStorage/
|
|
- /wiki/SecondaryStorage/
|
|
---
|
|
|
|
Storing AppVMs on Secondary Drives
|
|
==================================
|
|
|
|
Suppose you have a fast but small primary SSD and a large but slow secondary HDD.
|
|
You want to store a subset of your AppVMs on the HDD.
|
|
|
|
### R4.0 ###
|
|
|
|
Qubes 4.0 is more flexible than earlier versions about placing different VMs on different disks.
|
|
For example, you can keep templates on one disk and AppVMs on another, without messy symlinks.
|
|
|
|
Assuming you have already created a separate [volume group](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/vg_admin#VG_create) and [thin pool](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/thinly_provisioned_volume_creation) (not thin volume) for your HDD, first collect some information in a dom0 terminal:
|
|
|
|
sudo pvs
|
|
sudo lvs
|
|
|
|
Take note of the VG and thin pool names for your HDD, then register it with Qubes:
|
|
|
|
# pool_name is a freely chosen pool name
|
|
# vg_name is LVM volume group name
|
|
# thin_pool_name is LVM thin pool name
|
|
qvm-pool --add pool_name lvm_thin -o volume_group=vg_name,thin_pool=thin_pool_name
|
|
|
|
Now, you can create qubes in that pool:
|
|
|
|
qvm-create -P pool_name --label red vmname
|
|
|
|
It isn't possible to directly migrate an existing qube to the new pool, but you can clone it there, then remove the old one:
|
|
|
|
qvm-clone -P pool_name old_name new_name
|
|
qvm-remove old_name
|
|
|
|
If that was a template, or other qube referenced elsewhere (NetVM or such), you will need to adjust those references manually after moving.
|
|
For example:
|
|
|
|
qvm-prefs appvm_based_on_old_name_template template new_name
|
|
|
|
In theory, you can still use file-based disk images ("file" pool driver), but it lacks some features such as you won't be able to do backups without shutting down the qube.
|
|
|
|
### R3.2 ###
|
|
|
|
In dom0:
|
|
|
|
mv /var/lib/qubes/appvms/my-new-appvm /path/to/secondary/drive/my-new-appvm
|
|
ln -s /path/to/secondary/drive/my-new-appvm /var/lib/qubes/appvms/
|
|
|
|
Now, `my-new-appvm` will behave as if it were still stored on the primary SSD (except that it will probably be slower, since it's actually stored on the secondary HDD).
|
|
|
|
* The above procedure does **not** interfere with [Qubes Backup][].
|
|
However, attempting to symlink a `private.img` file (rather than the whole AppVM directory) is known to prevent the `private.img` file from being backed up.
|
|
The same problem may occur if the above procedure is attempted on a [TemplateVM][]. [[1]]
|
|
|
|
* After implementing the above procedure, starting `my-new-appvm` will cause dom0 notifications to occur stating that loop devices have been attached to dom0.
|
|
This is normal.
|
|
(No untrusted devices are actually being mounted to dom0.)
|
|
Do not attempt to detach these disks.
|
|
(They will automatically be detached when you shut down the AppVM.) [[2]]
|
|
|
|
[Qubes Backup]: /doc/BackupRestore/
|
|
[TemplateVM]: /doc/Templates/
|
|
[1]: https://groups.google.com/d/topic/qubes-users/EITd1kBHD30/discussion
|
|
[2]: https://groups.google.com/d/topic/qubes-users/nDrOM7dzLNE/discussion
|