similar to: Read performance on software RAID1?

OK sorry to hammer the list but one more question - having almost got the drives mirrored and happy - since I have created a custom initrd that has the raid1 drivers in it, do I now have to tell yum to ignore kernel updates? Will the stock kernel render me unbootable? Actually I am not 100% sure the initrd I created # mkinitrd -f --preload=raid1 /mnt/tmp/initrd-`uname -r`.img `uname -r` is

Hi all, I?m trying to create a RAID1 on a machine. I?ve already configurated BIOS (mother board, Intel, S500VSA SATA) so as to build RAID1 via hardware. However on CentOS Installer, when I reach "disk setup" screen, it shows up 2 devices (/dev/sda and /dev/sdb). Is this right (both devices being showed)? How should I proceed on this moment? If I create the

Hi, I had a CentOS running and working fine. Recently i had upgraded it to 4.4. I would like to do a raid1 on this machine. Is it possible to do it? Or do i need to reinstall the system with raid1? regards

Hello All, on a Centos5 system installed with software raid I'm getting: raid1: raid set md127 active with 2 out of 2 mirrors md:.... autorun DONE md: Autodetecting RAID arrays md: autorun..... md : autorun DONE trying to resume form /dev/md1 creating root device mounting root device mounting root filesystem ext3-fs : unable to read superblock mount :

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

(Resend: message didn't show, was my original message too big? Posted one of the output files to a website to see) The point of RAID1 is to allow for continued uptime in a failure scenario. When I assemble servers with RAID1, I set up two HDDs to mirror each other, and test by booting from each drive individually to verify that it works. For the OS partitions, I use simple partitions and

When a new system CentOS-4.4 is built the swap partition is always reversed... Note md3 below, the raidtab is OK, I have tried various raid commands to correct. swapoff -a raidstop /dev/md3 mkraid /dev/md3 --really-force swapon -a And then I get a proper ourput for /proc/mdstat, but when I reboot /proc/mdstat again reads as below, with md3 [0] [1] reversed. [root]# cat /proc/mdstat

I have 3 4TB WD drives I want to put in a RAID1 array. Two WD4000FYYZ and One WD4000F9YZ All enterprise class but two are WD Re and one is WD Se. I ordered the first two thinking 2 drives in the raid array would be sufficient but later decided its a long drive to the server so I would rather have 3 drives and ordered a third in accidentally did not get EXACT same thing. Would there be ANY

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

I am running software RAID1 on a somewhat critical server. Today I noticed one drive is giving errors. Good thing I had RAID. I planned on upgrading this server in next month or so. Just wandering if there was an easy way to fix this to avoid rushing the upgrade? Having a single drive is slowing down reads as well, I think. Thanks. Feb 7 15:28:28 server smartd[2980]: Device: /dev/sdb

hello all, I have a setup that is raid 1 and put the mirrored drive back in and now it is still showing as degraded saying: raid1: raid set md6 active with 1 out of 2 mirrors with this message on all the raids.i know i am wrong by saying this but i thought putting in the driving and rebooting would start the re syncing itself. what do i have to do to add this back in, i am so confused with this

Hi, I'm currently experimenting with software RAID1 on a spare PC with two 40 GB hard disks. Normally, on a desktop PC with only one hard disk, I have a very simple partitioning scheme like this : /dev/hda1 80 MB /boot ext2 /dev/hda2 1 GB swap /dev/hda3 39 GB / ext3 Here's what I'd like to do. Partition a second hard disk (say, /dev/hdb) with three

I just installed CentOS 5.4 64 bit release on a 1.9ghz CPU with 8gB of RAM. It has 2 Western Digital 1.5TB SATA2 drives in RAID1. [root at server ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/md2 1.4T 1.4G 1.3T 1% / /dev/md0 99M 19M 76M 20% /boot tmpfs 4.0G 0 4.0G 0% /dev/shm [root at server ~]# Its barebones

how is the stability of software raid1 on a system running centos3. i have 2 75gig hard drives that i would like to mirror if possible, that being the reliability is worth it...there will be lots of network traffic on the server. It will be used possibly as a file server, it will most definitely be used also as a mail server and webserver. i would be ok to me to not mirror the drives but this is

I want to mirror an existing 40GB data only drive using software Raid1 on my new CentOS 4 server. The existing drive is connected to a Promise Ultra 100 TX2 controller (non-raid). I have read about mdadm and understand how to create the Raid1 on /dev/mdxx devices. However I would like to know if the existing data on the orignal 40GB drive in the system will be destroyed when I create the raid with

Conclusion: DO NOT USE SOFTWARE RAID-1 WITH EXT3 I've started with this conclusion cause i am positive that raid-1 and ext3 are causing data corruption. I've upgraded from 7.1 to 7.2 and from the first date i run into data corruption problems @ least once per day (i was monitoring once per day only) after 7 days we bought a brand new server cause the previous was very old and i thought

I have a general question on software RAID performance. If using two IDE disks on RAID 1: is there much of a difference performancewise if I put both on one IDE port as master and slave or should I better put them on seperate ports. I remember from olde days that it was recommended to put CD and hard disk on different ports to maximize the throughput between them and as RAID1 is theoretically

Hi everyone. Some body knows why my instalation always says Could Not mount root device (0,0), then reboots, i try to compile my own dom0 kernel, but always says the same thing. I''m seeking on create the initrd image, but nothings works. :( The currently hardware profile is this. Intel Server Board SE7230NH1-E (VT Enabled Motherboard) Intel Pentium D 830 CPU (3Ghz x 2 CPU) 2 GB

Hello, I've got a 4.4 box that i'd like to implement software raid on. Does anyone have any experiences with this? Thanks. Dave.

Everyone, We just had a pretty bad crash on one of production boxes and the ext2 filesystem on the data partition of our box had some major filesystem corruption. Needless to say, I am now looking into converting the filesystem to ext3 and I have some questions regarding ext3 and Linux software RAID. I have read that previously there were some issues running ext3 on a software raid device