[CentOS] raid 5 install

Miroslav Geisselreiter
Fri, 28 Jun 2019 08:04:43 -0000

If you can afford it I would prefer to use RAID10. You will loose half
of disk space but you will get really faster system. It depends what you
need / what you will use server for.

Mirek

28.6.2019 at 7:01 Nicolas Kovacs:
> Le 27/06/2019 ? 15:36, Nikos Gatsis - Qbit a ?crit?:
>> Do I have to consider anything before installation, because the disks
>> are very large?
> I'm doing this kind of installation quite regularly. Here's my two
cents.
>
> 1. Use RAID6 instead of RAID5. You'll lose a little space, but
you'll
> gain quite some redundancy.
>
> 2. The initial sync will be very (!) long, something like a day or two.
> You can use your server during that time, but he'll not be very
responsive.
>
> 3. Here's a neat little trick you can use to speed up the initial sync.
>
>    $ sudo echo 50000 > /proc/sys/dev/raid/speed_limit_min
>
> I've written a detailed blog article about the kind of setup you want.
> It's in French, but the Linux bits are universal.
>
> https://www.microlinux.fr/serveur-lan-centos-7/
>
> Cheers,
>
> Niki
>