Hi,
And thanks again, I have followed your advice, creating an 8TB mirrored logical
volume on my two new drives, i.e. using 1 mirror = 2 copies.
On Mon 2020-05-11 13.15.55, Greater London Linux User Group wrote:
Hi,
What size are the partitions on the old 8TB disks?
Is it a single partition
Hi,
On Mon 2020-05-11 22.31.44, James Courtier-Dutton wrote:
Which filesystem are you using on the old 8TB disk?
For example, if it is btrfs, you don't have to copy anything about.
btrfs does its own raid 0.
You can just add more disks as you need them and btrfs just uses them.
Interesting.
Hi,
I forgot another obvious question.
Which filesystem are you using on the old 8TB disk?
For example, if it is btrfs, you don't have to copy anything about.
btrfs does its own raid 0.
You can just add more disks as you need them and btrfs just uses them.
Kind Regards
James
--
GLLUG mailing
On 11/05/2020 20:14, Dr. Axel Stammler via GLLUG wrote:
[snip]
I feel rather nervous as I am about to do all this, and I do have some
questions (see below).
[snip detailed steps]
I wouldn't do it that way. Possibly someone else can tell us a reason
why it's worth moving the RAID
Hi,
And thank you for all contributions.
On Mon 2020-05-11 19.40.15, Greater London Linux User Group wrote:
On Mon, May 11, 2020 at 01:15:55PM +0100, James Courtier-Dutton via GLLUG wrote:
If you have a separate data from the OS partition:
you could "rsync -avpP" the
Hi,
On Mon 2020-05-11 10.58.13, Greater London Linux User Group wrote:
I believe modern mdadm can reshape a RAID-1 into a RAID-0 then a
RAID-0 into a RAID-10 and then add extra devices.
https://www.berthon.eu/2017/converting-raid1-to-raid10-online/
There will be a scary time when it is
Hi
On Mon, May 11, 2020 at 01:15:55PM +0100, James Courtier-Dutton via GLLUG wrote:
> If you have a separate data from the OS partition:
> you could "rsync -avpP" the data/image/picture/whatever files over to
> the new disks on top of LVM.
> You could handle the OS partition offline.
> You
Hi,
On Mon 2020-05-11 10.02.00, Greater London Linux User Group wrote:
On 10/05/2020 21:35, Andy Smith via GLLUG wrote:
Hello,
On Sun, May 10, 2020 at 10:03:32PM +0200, Dr. Axel Stammler via GLLUG wrote:
On Sun 2020-05-10 08.53.16, James Courtier-Dutton wrote:
So, I think moving to an "LVM
Hi, Andy,
On Sun 2020-05-10 20.35.20, Greater London Linux User Group wrote:
On Sun, May 10, 2020 at 10:03:32PM +0200, Dr. Axel Stammler via GLLUG wrote:
On Sun 2020-05-10 08.53.16, James Courtier-Dutton wrote:
>So, I think moving to an "LVM mirror" solution is your best bet for
>future
Hi,
On Mon 2020-05-11 13.15.55, Greater London Linux User Group wrote:
What size are the partitions on the old 8TB disks?
Is it a single partition for all 8TB ?
Yes, it is. The system is on a separate hard disk drive.
If you have a separate data from the OS partition:
you could "rsync
On 11/05/2020 11:58, Andy Smith via GLLUG wrote:
...
Yes
I actually think it is possible and is a reasonable plan, though
backups will still be advised. I didn't suggest this at first
because initially we thought there were unequal-sized devices (4T
and 8T).
Same here.
I believe modern
Hi,
What size are the partitions on the old 8TB disks?
Is it a single partition for all 8TB ?
If you have a separate data from the OS partition:
you could "rsync -avpP" the data/image/picture/whatever files over to
the new disks on top of LVM.
You could handle the OS partition offline.
You can
Hello,
On Mon, May 11, 2020 at 10:22:46AM +0100, John Winters via GLLUG wrote:
> On 11/05/2020 10:02, James Roberts via GLLUG wrote:
> >I haven't reviewed all the recent replies, but is there any reason why you
> >can't add the the two new disks of the same size and migrate from RAID 1
> >to RAID
On 10/05/2020 21:35, Andy Smith via GLLUG wrote:
Hello,
On Sun, May 10, 2020 at 10:03:32PM +0200, Dr. Axel Stammler via GLLUG wrote:
On Sun 2020-05-10 08.53.16, James Courtier-Dutton wrote:
So, I think moving to an "LVM mirror" solution is your best bet for
future extensibility.
I haven't
Hello,
On Sun, May 10, 2020 at 10:03:32PM +0200, Dr. Axel Stammler via GLLUG wrote:
> On Sun 2020-05-10 08.53.16, James Courtier-Dutton wrote:
> >So, I think moving to an "LVM mirror" solution is your best bet for
> >future extensibility.
>
> After reviewing all options, this indeed seems to be
On Sun 2020-05-10 08.53.16, James Courtier-Dutton wrote:
So, there is a solution that uses tiled RAID. LVM has a "mirror" option.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/4/html/cluster_logical_volume_manager/mirrored_volumes
If you used that, you would not need a
Hi
On Sun, May 10, 2020 at 03:12:54PM +0200, Dr. Axel Stammler via GLLUG wrote:
> Hmm. How long would it take to copy (nearly) 8 TB?
Depends a lot of the size and type of the data. If large video files
then those will copy fast, but if the files are all small or are hard
links then there is
On 10/05/2020 14:12, Dr. Axel Stammler via GLLUG wrote:
[snip]
One thing which might work for you is to make your two new drives into
a RAID1 set and then use resulting device as your first Physical
Volume. Create a large logical volume within it, copy all your
existing files over (boring),
Thank you.
On Sun 2020-05-10 07.39.31, Greater London Linux User Group wrote:
On 09/05/2020 20:32, Dr. Axel Stammler via GLLUG wrote:
On Sat 2020-05-09 11.24.15, Greater London Linux User Group wrote:
How do you intend to combine them? You won't be able to put your
existing array into the
On Sat, 9 May 2020 at 12:03, Dr. Axel Stammler
wrote:
>
> Hi,
>
> Thank you for your detailed look at possible setups. I remembered my old
> setup incorrectly, though, so that I am not sure everything is applicable. My
> original (2016) setup included two hard disk drives of not 4 TB but 8 TB
On Sat, May 09, 2020 at 11:24:15AM +, Andy Smith via GLLUG wrote:
> How do you intend to combine them? You won't be able to put your
> existing array into the LVM without destroying its contents.
Forgot to mention; this sort of conundrum is why it's often useful
to put things in LVM to begin
Hi Axel,
On Sat, May 09, 2020 at 01:03:37PM +0200, Dr. Axel Stammler via GLLUG wrote:
> My original (2016) setup included two hard disk drives of not 4 TB
> but 8 TB capacity in a RAID-1 that has reached 92 per cent
> capacity.
[…]
> I have ordered two more […] my first idea was to create a new
Hi,
Thank you for your detailed look at possible setups. I remembered my old setup
incorrectly, though, so that I am not sure everything is applicable. My
original (2016) setup included two hard disk drives of not 4 TB but 8 TB
capacity in a RAID-1 that has reached 92 per cent capacity.
On
Hi,
Regarding which are SMR. Here is a good place to start:
https://hardware.slashdot.org/story/20/04/29/2119250/toshiba-publishes-full-list-of-its-drives-using-slower-smr-technology
TOSHIBA:
https://toshiba.semicon-storage.com/ap-en/company/news/news-topics/2020/04/storage-20200428-1.html
WD:
Hi,
On Tue 2020-04-28 16.10.42, Greater London Linux User Group wrote:
Next up, if your drives don't support SCTERC timeout facility then
this is not ideal for a Linux RAID system but can be worked around
Thanks. This is another great tip. Is there any way to find out if a drive has
that
On 02/05/2020 13:48, Dr. Axel Stammler via GLLUG wrote:
Hi,
Thanks for these valuable tips, especially the one about SMR. I have
looked at the topic in more detail and I am really glad I did. Could you
suggest a way of finding non-SMR hard disk drives, especially at decent
prices?
Cheap is
On Tue 2020-04-28 13.19.10, James Courtier-Dutton wrote:
First for RAID, avoid SMR HDDs. (Shingled magnetic recording)
Hi,
Thanks for these valuable tips, especially the one about SMR. I have looked at
the topic in more detail and I am really glad I did. Could you suggest a way of
finding
Hi,
On Tue, Apr 28, 2020 at 01:18:08PM +0200, Dr. Axel Stammler via GLLUG wrote:
> I have a 4 TB RAID system (two identical hard disks combined in a
> RAID-1, created using mdadm). Now, after a few years, this has
> reached 90% capacity, and I am thinking about first adding another
> similar 8 TB
On Tue, 28 Apr 2020 at 12:18, Dr. Axel Stammler via GLLUG
wrote:
>
> Hi,
>
> I have a 4 TB RAID system (two identical hard disks combined in a RAID-1,
> created using mdadm). Now, after a few years, this has reached 90% capacity,
> and I am thinking about first adding another similar 8 TB RAID
Hi,
I have a 4 TB RAID system (two identical hard disks combined in a RAID-1,
created using mdadm). Now, after a few years, this has reached 90% capacity,
and I am thinking about first adding another similar 8 TB RAID system and then
combining them into one 12 GB RAID 1+0 filesystem. I should
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