similar to: New page on installing to software RAID

I have attempted to address all comments: http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 Give me your best shot! :-D Phil

Does documentation exist describing how to convert a simple, single disk non-RAID CentOS 5 system to software RAID1 using the CentOS install CD/DVD as a rescue disk? (Assuming not) Is there a need for such? (Assuming need) I volunteer to produce it. -------------------- Ed Heron

http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 has: dd if=/dev/zero of=/dev/sda bs=512 count=64 dd if=/dev/zero of=/dev/sdb bs=512 count=64 Will the joker who put in this particular gem without any warnings or a clear explanation for those who need a clueby4 with regards to file systems please either remove the instructions or add a very clear warning that damage to file systems that is

http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 has: dd if=/dev/zero of=/dev/sda bs=512 count=64 dd if=/dev/zero of=/dev/sdb bs=512 count=64 Will the joker who put in this particular gem without any warnings or a clear explanation for those who need a clueby4 with regards to file systems please either remove the instructions or add a very clear warning that damage to file systems that is

I have some suggested tweaks and changes to http://wiki.centos.org/HowTos/Install_On_Partitionable_RAID1 1. The user should be instructed to start rescue mode with networking in order to be able to retrieve the patch for mkinitrd. 2. The command to create /etc/mdadm.conf will result in an extra line "spares=1" while the array is still syncing. Adding " | head -1 " to the

Wiki name PhilSchaffner. I would like to work on the following pages: TipsAndTricks/CreatingUpdateMedia - new page How to create CD/DVD update media and use to update CentOS HowTos/BuildPackages - new page How to set up an end-user environment to build RPM packages HowTos/CreateLocalRepos - new page How to create and maintain local repo[s] for your custom packages

Greetings - I am preparing to order a new desktop system for work. In general the new system will be a Dell Precision T3610 with two 3 TB drives. I plan on installing CentOS 7 as a KVM host, with virtual machines for Win 7 Pro and Linux Mint. I am looking for some advice or a good how-to on configuring software raid on the two drives, then using LVM for the host and virtual machines. I

Hello, I was wondering if someone could help me, I'm putting together a Server for personal use, I want to virtualize a few servers(mail, web, ssh) and use it as a NAS, but I have a question if I can use Multiple RAID Arrays using the following HW: Intel Xeon Quad Core X3430 ASUS P7F-M LGA 1156 - LSI MegaRAID(integrated) - HighPoint RocketRAID 2640x1 2 Hitachi 500GB HDDs 4 Hitachi 1TB HDDs

Hi, I've written two small howtos, and would like to contribute them to the CentOS Wiki. The first one is "How to install CentOS 5 on software partitionable mdadm RAID1", and the second one "How to repair a software mdadm RAID5 with two or more failed disks (if you know that information is still on the disks and readable)". I think that the first one should be somewhere

Greetings ... Been lurking on the list for some time, hoping that at some point, I might be able to add to the collective (Yes, way to much StarTrek in the background! ) ... I have learn quite a bit by just lurking, but now I think I might have something to add ... I'm not sure the exact protocol or procedure for this and it's late in the evening and would like get this out, before I

Hi Ralph, Whilst wearing you C-devel hat, will you please have a look at a recent forum thread [1] that has highlighted the ambiguity on the CentOS Product Specification web page [2]. I'm asking this here, as I guess that page really does come under documentation . . . and you are the documentation-meister. If it is not actually your area, please let me know who's cage bars I should

Hi, I have a server with 2 disks. Installed centos 5.9 with raid1. I created /dev/md0 to hold "/" and /dev/md1 for swap and nothing else. Grub is installed on /dev/md0. After the successful installation, the server does not boot. I don't see the boot loader . I see a blank cursor blinking. What have I done wrong? Thanks Paras.

dmesg is not reporting any issues. The /proc/mdstat looks fine. md0 : active raid1 sdb1[1] sda1[0] X blocks [2/2] [UU] however /var/log/messages says: smartd[3392] Device /dev/sda 20 offline uncorrectable sectors The machine is running fine.. raid array looks good - what is up with smartd? THanks, Jerry

Sorry for breaking the threading, as I only get the daily digest. My comments (interspersed) begin with the **. Message: 41 Date: Tue, 16 Sep 2014 18:38:02 -0400 From: SilverTip257 <silvertip257 at gmail.com> To: CentOS mailing list <centos at centos.org> Subject: Re: [CentOS] Advice on CentOS 7, software raid 1, lvm, 3 TB disks Message-ID:

I have configured 2x 500G sata HDD as Software RAID1 with three partitions md0,md1 and md2 with md2 as 400+ gigs Now it is almost 36 hours the status is cat /proc/mdstat Personalities : [raid1] md0 : active raid1 hdb1[1] hda1[0] 104320 blocks [2/2] [UU] resync=DELAYED md1 : active raid1 hdb2[1] hda2[0] 4096448 blocks [2/2] [UU] resync=DELAYED md2 : active raid1

I am trying to install Centos 7 on a couple 4TB drives with software raid. In the Supermicro bios I set UEFI/BIOS boot mode to legacy. I am using the Centos 7 minimal install ISO flashed to a USB thumb drive. So I do custom drive layout something like this using sda and sdb. Create /boot as 512 MB XFS raid1 array. Create SWAP as 32 GB SWAP raid1 array. Create / on 3.xxx TB XFS raid1 array.

I installed Centos 6.x 64 bit with the minimal ISO and used two disks in RAID 1 array. Filesystem Size Used Avail Use% Mounted on /dev/md2 97G 918M 91G 1% / tmpfs 16G 0 16G 0% /dev/shm /dev/md1 485M 54M 407M 12% /boot /dev/md3 3.4T 198M 3.2T 1% /vz Personalities : [raid1] md1 : active raid1 sda1[0] sdb1[1] 511936 blocks super 1.0

I have the CentOS 5.5 install DVD and trying to install with software RAID1 on two 2TB SATA drives. The CentOS install only sees one drive. This is a Supermicro motherboard with fakeraid turned off in bios. I tried the trick like so: dd if=/dev/zero of=/dev/sda bs=512 count=64 dd if=/dev/zero of=/dev/sdb bs=512 count=64 Still no go. linux rescue console does see both sda and sdb. Whats

Hello all, I have 2 x 250GB sata disks (sda and sdb). # fdisk -l /dev/sda Disk /dev/sda: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 14939 119997486 fd Linux raid autodetect /dev/sda2 14940 29878

Somewhere, mdadm is cacheing information. Here is my /etc/mdadm.conf file: more /etc/mdadm.conf # mdadm.conf written out by anaconda DEVICE partitions MAILADDR root ARRAY /dev/md0 level=raid1 num-devices=4 metadata=0.90 UUID=55ff58b2:0abb5bad:42911890:5950dfce ARRAY /dev/md1 level=raid1 num-devices=2 metadata=0.90 UUID=315eaf5c:776c85bd:5fa8189c:68a99382 ARRAY /dev/md2 level=raid1 num-devices=2