similar to: CentOS 7 : create RAID arrays manually using mdadm --create ?

On Mon, Feb 9, 2015 at 5:16 PM, Niki Kovacs <info at microlinux.fr> wrote: > Hi, > > When installing CentOS 7, is there a way to > > 1. leave the GUI installer and open up a console > 2. create RAID arrays manually using mdadm --create > 3. get back in the GUI installer and use the freshly created /dev/mdX > arrays? > > I tried to do this, but the installer

Le 10/02/2015 02:01, Chris Murphy a ?crit : > It's useful to know what layout you want. The installer will neither > create, nor let you use, what it thinks are ill-advised layouts. The > main reason I can think of for pre-creating md devices is to use a > non-default chunk/strip size. I'd like to be able to create either a simple RAID 1 layout with two disks, with a separate

Le 18/02/2015 23:12, Chris Murphy a ?crit : > What is NOT obvious: for single device installs, if you omit the size > in the create mount point dialog, the size of the resulting volume > will consume all remaining space. But since there's no way to preset > raid5 at the time a mount point is created (raid5 is set after the > fact), there isn't a clear way to say "use

On Mon, Feb 9, 2015 at 11:57 PM, Niki Kovacs <info at microlinux.fr> wrote: > I'd like to be able to create either a simple RAID 1 layout with two disks, > with a separate /boot partition, or a simple RAID 5 layout with 4 disks, > with a separate /boot partition too. The installer can create either of these layouts in manual partitioning. > > The layouts are described

Hi, I just replaced Slackware64 14.1 running on my office's HP Proliant Microserver with a fresh installation of CentOS 7. The server has 4 x 250 GB disks. Every disk is configured like this : * 200 MB /dev/sdX1 for /boot * 4 GB /dev/sdX2 for swap * 248 GB /dev/sdX3 for / There are supposed to be no spare devices. /boot and swap are all supposed to be assembled in RAID level 1 across

Le 18/02/2015 09:24, Michael Volz a ?crit : > md127 apparently only uses 81.95GB per disk. Maybe one of the partitions has the wrong size. What's the output of lsblk? I just spent a few hours experimenting with the CentOS 7 installer in a VirtualBox guest with four virtual hard disks. I can now confirm this is a very stupid bug in the (very stupid) installer. Or at least one more random

Le 18/02/2015 09:24, Michael Volz a ?crit : > Hi Niki, > > md127 apparently only uses 81.95GB per disk. Maybe one of the partitions has the wrong size. What's the output of lsblk? [root at nestor:~] # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 232,9G 0 disk ??sda1 8:1 0 3,9G 0 part ? ??md126 9:126 0 3,9G 0 raid1 [SWAP] ??sda2 8:2

Le 19/02/2015 05:43, Chris Murphy a ?crit : > My personal view on installers is extremely biased toward the user > staying out of trouble, they shouldn't have to read documentation for > a GUI installer. A *user* never has to even see - or use - an installer. A USER has to USE a computer, by which I mean the applications he or she needs to get some work done. The person who gets

Le 18/02/2015 23:12, Chris Murphy a ?crit : > "installer is organized around mount points" is correct, and what gets > mounted on mount points? Volumes, not partitions. Says who? -- Microlinux - Solutions informatiques 100% Linux et logiciels libres 7, place de l'?glise - 30730 Montpezat Web : http://www.microlinux.fr Mail : info at microlinux.fr T?l. : 04 66 63 10 32

Hi Niki, md127 apparently only uses 81.95GB per disk. Maybe one of the partitions has the wrong size. What's the output of lsblk? Regards Michael ----- Urspr?ngliche Mail ----- Von: "Niki Kovacs" <info at microlinux.fr> An: "CentOS mailing list" <CentOS at centos.org> Gesendet: Mittwoch, 18. Februar 2015 08:09:13 Betreff: [CentOS] CentOS 7: software RAID 5

In article <20190225050144.GA5984 at button.barrett.com.au>, Jobst Schmalenbach <jobst at barrett.com.au> wrote: > Hi. > > CENTOS 7.6.1810, fresh install - use this as a base to create/upgrade new/old machines. > > I was trying to setup two disks as a RAID1 array, using these lines > > mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sdb1

Le 19/02/2015 11:03, Chris Murphy a ?crit : > This is a false dichotomy. I reject it. There's too much fact to the > contrary. My mom has done an OS installation, she is most definitely > not an admin. I'd say your mom is an admin in the sense that chickens fly and horses swim. :o) -- Microlinux - Solutions informatiques 100% Linux et logiciels libres 7, place de l'?glise

> Hi. > > CENTOS 7.6.1810, fresh install - use this as a base to create/upgrade > new/old machines. > > I was trying to setup two disks as a RAID1 array, using these lines > > mdadm --create --verbose /dev/md0 --level=0 --raid-devices=2 /dev/sdb1 > /dev/sdc1 > mdadm --create --verbose /dev/md1 --level=0 --raid-devices=2 /dev/sdb2 > /dev/sdc2 > mdadm

On Tue, Feb 10, 2015 at 1:13 PM, Les Mikesell <lesmikesell at gmail.com> wrote: > On Tue, Feb 10, 2015 at 1:54 PM, Chris Murphy <lists at colorremedies.com> wrote: >> >> - I would not put swap on an md device, I'd just put a plain swap >> partition on each device; first create two swap mountpoints, > > If one of the devices fails, doesn't that mean

On Tue, Feb 10, 2015 at 1:54 PM, Chris Murphy <lists at colorremedies.com> wrote: > > - I would not put swap on an md device, I'd just put a plain swap > partition on each device; first create two swap mountpoints, If one of the devices fails, doesn't that mean that any processes with swap on the associated space will be killed? Avoiding that is kind of the point of

On 2/10/2015 6:54 PM, Chris Murphy wrote: > Why I avoid swap on md raid 1/10 is because of the swap caveats listed > under man 4 md. Is possible for a page in memory to change between the > writes to the two md devices such that the mirrors are in fact > different. The man page only suggests this makes scrub check results > unreliable, and that such a difference wouldn't be read

Hi, My workstation is currently running Slackware Linux 14.1 64-bit, and I'm considering replacing that by CentOS 7, which I've already installed on my laptop. The PC has an NVidia GeForce GT 520 video card with two 19'' monitors attached to it. I'm using the proprietary 'nvidia' driver. I vaguely remember having read somewhere that RHEL/CentOS 7 with GNOME 3 had

Hi, I'm looking for recommendations for documentation about the specificities of RHEL/CentOS 7.x. It can be either online or in printed book format, and I'm fluent in german, french and english. I have a good books about 5.x: "RHEL 5 Unleashed" from Sams, "Foundations of CentOS Linux" and "The Definitive Guide to CentOS", both from Apress. Can anyone

Hi, I wonder where - and eventually how - GNOME 3 stores its user preferences. I'd like to create a custom user profile, with slightly different settings than the default ones: * don't show home folder on ~/Desktop * don't show Trash * use custom default wallpaper * stretch wallpaper instead of zooming * use different default icon theme * etc. Until now I've done this

Hi, I often have to deal with relatively obsolete hardware in schools, public libraries, small town halls, etc. I still have a handful of CentOS 5.x installations around for these, but I wonder what CentOS 6.x desktop specs are, e. g. the minimum requirements (in terms of CPU and RAM) to reasonably run it. Will a battered first-generation P-IV with 512 MB RAM be sufficient? How much RAM does