similar to: mdraid strange surprises...

Is it possible or will there be any problems with using mdraid on top of mdraid? specifically say mdraid 1/5 on top of mdraid multipath. e.g. 4 storage machines exporting iSCSI targets via two different physical network switches then use multipath to create md block devices then use mdraid on these md block devices The purpose being the storage array surviving a physical network switch

Can I combine VMWare ESXi (free version) virtualization and CentOS mdraid level 1? Any pointers how to do it? I never used VMWare before. - Jussi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi at greenspot.fi * http://www.greenspot.fi

Hello all, I have been doing some searching for information about disabling services within a CentOS 5.5 install. I have found a few different opinions, and wanted to ask for some feedback. First off, the system is running a LAMP stack to serve a web application. It will only be doing email to send occasional messages out (sent via the application only). It will not be receiving email for any

Dear fellow CentOS users, I have never experienced this problem with hard disk management before and cannot explain it to myself on any rational basis. The setup: I have a workstation for testing, running latest CentOS 7.3 AMD64. I am evaluating oVirt and a storage-ha as part of my bachelors thesis. I have already been running a RAID1 (mdraid, lvm2) for the system and some oVirt 4.1 testing.

Hi, I am trying to adapt my kickstart usb key to optionally auto-setup mdraid on two disks...? But I have one server that keeps attaching the usb key to sda instead of sdc... My kickstart creates the raid devices on sdb and sdc partitions; but then I expect it not to work once the key is unplugged and the disks fall back to sda and sdb... Can I just modify mdadm.conf at the end, just

There are some errors on my root filesystem, so I need to fsck it. In order to do this while the filesystem is unmounted, I'm booting from the install disk. However, since the filesystem is on an mdraid device, I'm not sure of the right way to get it assembled so I can check it. If I do, mdadm --examine --scan, then I get this: ARRAY /dev/md/2 metadata=... (and others, but I'm

So I'm curious how SAS JBOD arrays and linux MDraid as implemented in CentOS6, and SES (SCSI/SAS Enclosure Services) backplane controllers 'get along' and how much configuration is needed to get the warning lights to work properly. scenario: whitebox server with a SAS backplane or two, daisy chained on a SAS HBA (like an LSI Logic 2008), and disks organized as several raid5/6

Hi list, I'm new with UEFI and GPT. For several years I've used MBR partition table. I've installed my system on software raid1 (mdadm) using md0(sda1,sdb1) for swap, md1(sda2, sdb2) for /, md2 (sda3,sdb3) for /home. From several how-to concerning raid1 installation, I must put each partition on a different md devices. I've asked times ago if it's more correct create the

Something seems to be wrong with my file systems, and I want to fsck everything. But I cannot. The setup consists of 2 hds, carrying 3 raid1 (ext3) file systems (boot, /, swap). OS is up-to-date CentOS 5. So I boot from CentOS 5.3 dvd in rescue mode, do not mount the file systems, and try to run fsck -y /dev/md0 fsck -y /dev/md1 fsck -y /dev/md2 For each try I get an error message:

On 01/11/2023 01:33 PM, H wrote: > On 01/11/2023 02:09 AM, Simon Matter wrote: >> What I usually do is this: "cut" the large disk into several pieces of >> equal size and create individual RAID1 arrays. Then add them as LVM PVs to >> one large VG. The advantage is that with one error on one disk, you wont >> lose redundancy on the whole RAID mirror but only on

Hi, Can anyone help me with this since I want to get it done "the correct way" I'm trying to make mdmonitor to execute a program when it detects a fail event automatically. Currently, from what I see, init is calling mdmonitor with these options mdadm --monitor --scan -f (note that the --program is not there) and this is in my /etc/mdadm.conf MAILADDR root PROGRAM

> Follow-up question: Is my proposed strategy below correct: > - Make a copy of all existing directories and files on the current disk using clonezilla. > - Install the new M.2 SSDs. > - Partitioning the new SSDs for RAID1 using an external tool. > - Doing a minimal installation of C7 and mdraid. > - If choosing three RAID partitions, one for /boot, one for /boot/efi and the

> On 01/11/2023 01:33 PM, H wrote: >> On 01/11/2023 02:09 AM, Simon Matter wrote: >>> What I usually do is this: "cut" the large disk into several pieces of >>> equal size and create individual RAID1 arrays. Then add them as LVM PVs >>> to >>> one large VG. The advantage is that with one error on one disk, you >>> wont >>>

I am trying to install CentOS5 on a new HP DL360e G8 with B120i disk controller. It appears that a proprietary HP driver is needed for it. I found a useful description at http://www.linuxhelp.in/2013/08/Installing-centos-on-HP-Proliant-DL360e-Gen8-with-B120i-controller.html I have a pair of hard drives to use as a RAID1 mirror. My question to people who may have been this way already is: is it

Hey, (sorry for cross-posting, you will find this message also in centos-virt, maybe, but this was not intended and a mistake) I have a system with a mdraid 1 ... md1 : active raid1 sdb2[1] sda2[0] 1465031488 blocks [2/2] [UU] ... this raid partition has a lvm physical volume with one volume group and several logical volumes. This machine is running since years and I seldom touch the lvm

On 8/5/2015 11:27 AM, m.roth at 5-cent.us wrote: > Bowie Bailey wrote: >> I am trying to upgrade my system from 500GB drives to 1TB. I was able >> to partition and sync the raid devices, but I cannot get the new drive >> to boot. >> >> This is an old system with only IDE ports. There is an added Highpoint >> raid card which is used only for the two extra

Hi, I encounter a problem with Syslinux 5.00 I cannot really describe. So I created two small videos: Booting with Syslinux 5.00 (1.3 MB): <https://www.dropbox.com/s/b6g8cdf2t9v48c6/boot-syslinux5-fail.mp4> How I fixed the problem by downgrading to Syslinux 4.06 and how booting should look like (6.5 MB): <https://www.dropbox.com/s/lt7cpgfm0qvqtba/boot-syslinux5-how-i-fixed-it.mp4>

On 11/23/2016 2:42 PM, Gordon Messmer wrote: > > Many modern Intel systems come configured for an Intel "RAID" mode. > While configured for that mode, the SATA controller changes its PCI ID > so that the standard Windows drivers don't bind to it, allowing the > Intel RAID drivers to bind to it instead. There are no Linux drivers > that bind to the

Hi list, I'm building a backup server for 3 hosts (1 workstation, 2 server). I will use bacula to perform backups. The backup is performed on disks (2 x 3TB on mdraid mirror) and for each hosts I've created a logical volume with related size. This 3 hosts have different data size with different disk change rate. Each host must have a limited sized resource and a reserved space. If a

why will Centos 6 not boot from an mdraid 10 partition?