I have a couple of Centos servers, each connected to the Internet using its Static IP address. They are in the same physical rack. Is there a way I an get them to share a disk array. The disk array could be on one of the servers, or it could be separate SAN array.
View 3 RepliesI have a NETGEAR ReadyNAS NV+ with four 1TB drives in a RAID-5 array. This is our primary file storage. This has previously been backed up to a hardware RAID-0 array directly attached to our Windows server. The capacity of this backup array is no longer sufficient. So the plan was, take a bunch of 200GB to 320GB drives (And a 750) I had kicking around, chuck them in a couple of old SCSI drive enclosures I have collecting dust, attach them via IDA/SATA-to-USB adaptors to a USB hub, attach that to the server, create a JBOD array spanning the disks, and back up the NAS to that. Performance is not an issue as this is just to be used for backup, with the idea being as near to zero cost as possible (Spend so far = NZ$100�ish).
The first hurdle I struck was Windows not supporting Dynamic Disks on USB drives (Required to create a spanned volume). At first I resisted using another machine (i.e. a machine running Ubuntu) as I didn't want to dedicate a piece of hardware to backing up the NAS. I then decided it would be acceptable to do this via a VM, which is what I've done.So I have 10.04 running under VMWare Server 2.0.2 under Windows Server 2008 R2. The disks are all presented to the VM. I wasn't sure if I was going to end up creating the array under LVM or something else, but I noticed Disk Utility has an option to create an array, so I tried that. When I add two 250GB drives, the array size is 500GB. When I then add a 160GB drive, the array size drops to 480GB. Huh? If I keep adding disks (Regardless of order) the final array size comes out at 1.8 TB, as per the attached screenshot. Now with the following drives, I expected something more like:
160 + 250 + 250+ 750 + 250 +200 + 200 + 250 + 320 + 250 + 320 = 3.2TB
Am I missing something or making a false assumption somewhere?
how to rename disk array
# df -kh
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
444G 4.4G 417G 2% /
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I have an old server based on Tyan Thunder LE-T (s2518UGN),: embeeded VGA - ATI Rage XL two Intel Pentium III (PGA370) processors at 1133 MHz 512 MB ECC RAM embeeded Dual Intel 82559 LAN controllers 10/100Mbps embeeded Adaptec 7899W NT Ultra160 SCSI Adaptec SCSI RAID 2000S (PCI card to support for bootable RAID 5) 3x Seagate HDD ST318438LW connected in RAID 5 instaled OS was RedHat 8 rack case (2U) It worked fine but one disk from array failed.
I provided backup and decided use two mirrored SATA disks Seagate ST3500320NS HDD ES.2 500GB with PCI SATA controler Kouwell KW-5125 (SiI3124 chipset) inserted through PCI riser card (2U case). (I can't replace old SCSI disk because it isn't available any more.) I disabled SCSI controler in BIOS and removed Adaptec SCSI RAID 2000S PCI card. I inserted PCI SATA controler connected both SATA disks and configured mirroring.
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Our server is a CybertronPC I2XV9080 Imperium Tower. It is equipped with a supermicro X7DVL-I Motherboard and Quad 750 GB SATA2 RAID edition hard drives in a raid 5 array. We tried to install Centos on the Raid5 array with Device-Mapper as the LVM. In the BIOS SATA Raid was enabled and the ICH RAID code base option was set to [Intel].
Intel Matrix Storage Manager Option ROM V5.6.4.1002 ESB2
RAID
ID Name Level Strip Size Status Bootable
0 Raid5 Raid 5 64KB 80GB Normal Yes
1 Raid_5 Raid 5 64kB 2000GB Normal Yes[code].....
Can I have multiple level raids across the same array or would that lead to problems as above? Is the root cause of my problem the fact that intel raid5 is not supported for Linux as based on the following link http:[url]....
I have a RAID 5 array, md0, with three full-disk (non-partitioned) members, sdb, sdc, and sdd. My computer will hang during the AHCI BIOS if AHCI is enabled instead of IDE, if these drives are plugged in. I believe it may be because I'm using the whole disk, and the AHCI BIOS expects an MBR to be on the drive (I don't know why it would care).
Is there a way to convert the array to use members sdb1, sdc1 and sdd1, partitioned MBR with 0xFD RAID partitions?
My goal is to connect up a bunch of CentOS 5.6 servers to storage array which is running as an SRP target. These servers will be running eventually as Xen hypervisors. I'm using Mellanox Infiniband cards and a Qlogic Infiniband switch.
OFED drivers are already installed as standard. I have done the following.
1. Base install of CentOS 5.6 X86_64
2. Installed the following packages...
openib
ibutils
srptools
infiniband-diags
opensm
[Code]...
It works perfectly and connects to the target immediately with great results. I'd just like this to happen correctly on startup.
To work around the issue I have added the line srp_daemon -e -o into the init script for opensm /etc/init.d/opensmd but it doesnt always start the srp_daemon process. Its rather hit and miss
I'd really like srp_daemon to run as a service with a proper init script but I wouldnt know how to write one. I understand that this issue has been addressed in the RHEL6 srptools package but that doesnt help me because the software I intend to use on these servers specifically requires 5.
I received the following error when I got home from work today. If this was a windows environment, my first inclination would be to boot off my dvd and then run a chkdsk on the drive to flag any bad sectors that might exist. But there's a complication for me.
Code: Select allThis message was generated by the smartd daemon running on:
host name: LinuxDesktop
DNS domain: [Empty]
The following warning/error was logged by the smartd daemon:
Device: /dev/sdc [SAT], 1 Currently unreadable (pending) sectors
Device info:
WDC WD5000AAKS-65V0A0, S/N:WD-WCAWF2422464, WWN:5-0014ee-157c5db9a, FW:05.01D05, 500 GB
For details see host's SYSLOG.
You can also use the smartctl utility for further investigation.The original message about this issue was sent at Sun Feb 14 13:43:17 2016 MST.Another message will be sent in 24 hours if the problem persists.
From gnome-disks
Code: Select allDisk is OK, 418 bad sectors (28° C / 82° F)
I did a bit of reading and it seems that most people suggest using badblocks to first get a list of badblocks from the drive and save it to a file. Then use e2fsck to then mark the blocks listed in the badblocks file as bad on the hard drive. My problem here is that this drive is part of a RAID5 array that hosts my OS. I wanted to confirm if this was still the correct process.I boot to my Live Debian disk, stop the raid array if it's active. Then run badblocks + e2fsck commands on the drive in question and then reboot.
I had done a new lucid install to a 1 TB RAID 1 array using the alternate CD a few weeks back. I messed up that system trying to some hardware working that lucid doesn't have drivers for yet, so I gave up on it and reinstalled to a single 80 GB disk that I now want to move over to the RAID array.
I moved all of the existing files on the array to a single folder, then copied all of the folders from the 80 GB disk over to the array with permissions and symlinks (minus the contents of /proc and /sys, which I created empty).
These are the commands I used:
Quote:
p -a -d -R -v -t /media/raid_array /b*
cp -a -d -R -v -t /media/raid_array /d*
cp -a -d -R -v -t /media/raid_array /e*
cp -a -d -R -v -t /media/raid_array /h*
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I tried to change fstab to use the 689a... for root, but when I try to boot, it's still trying to open /dev/disk/by-uuid/412d...
So then I booted from the single disk again and chrooted into the array, then ran update-initramfs -u. I got 3 "grep: /proc/modules: No such file or directory" errors, and "cat: /proc/cmdline: No such file or directory"- so I created directory /proc/modules, created an empty file /proc/cmdline, and ran the initramfs update again. Then I tried to shut down, which hung (probably because I was doing all of this from a terminal window in Gnome), so I killed the power after a couple of minutes.
It's still trying to use /dev/disk/by-uuid/412d... to boot.
What am I missing? I assume I just have to change the UUID to mount as root, but I don't know how.
I am running a server in Dell which has RAID1 and hot plug 2 disks. It's been running for a while, but I was thinking it may crash anytime. So got a spare one, and wanted to test it how it works.I have never done this before. Can I simply, on a running machine, unplug the Disk 2 and connect the new Disk there? (Without interrupting the service as a silent mode?) Or does it have to be shutdown first, and unplugged, reinstalling all software/centos/etc etc? How do you do this update? Also how do you know when you replaced the disk? Do you have anything special to monitor that disk 1 or disk 2 is end of life?
View 1 Replies View RelatedI am trying to build a new array after adjusting TLER on my disks, which permanently changed some of the drives sizes. I am not sure if the following inconsistencies are related to the newly mismatched drive sizes.
Using:
Code:
mdadm --create --auto=md --verbose --chunk=64 --level=5 --raid-devices=4 /dev/md1 /dev/sdd /dev/sde /dev/sdf /dev/sdg
Nets me (build-time was two full days):
[Code]....
On a side note, since I'm recreating my array from scratch, I was wondering if anyone here knows of any optimized settings I could use. I've got 3Tb of data to transfer, so lots of test material.
These are Western Digital First Generation 2TB Green Drives (WD20EADS-00R6B0) with WDidle3 fix applied & TLER=ON. These are pre Advanced Format (aka not 4K).
Code:
mkfs.ext4 -E stripe-width=48,stride=16 /dev/md1
When I use disk utility to expand my RAID array it creates a partition on my 1.5TB drive which it would like to add to the RAID 5.
However, none of the drive existing on the RAID are partitioned so what I think has happened is the partition itself has created a difference of about 2 million bytes smaller than the others and thus unable to add the component.
How can I specify the exact bytes for my hard drive partition so that I can add this to the array?
I have a storedge 3511 array attached to a centos 4 system and need to upgrade to redhat 5. 1) How can I find out how the array was attached to the system? and/or 2) What do I need to do during the install for the array to be recognized?
fdisk -l output:
WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sde: 4998.3 GB, 4998352076800 bytes
255 heads, 63 sectors/track, 607681 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sde1 1 267350 2147483647+ ee EFI GPT
When I set up Ubuntu 10.10 I had only one hdd around so I installed my system with the idea that I will add the 2nd hdd for raid1 later on. Last weekend I wanted to add the hdd, but discovered, that ubuntu created a raid0 array. So I went on and tried different things: removing the 1st hdd from the raid0 array, create a raid1 with two disks, and so on... I finally could syncronize both disks but after a reboot the raid0 array appeared again with only one disk. Now I know, I should have written the mdadm.conf and fstab files... My last tries resulted in a missing superblock. Here is the story:
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I wanted to extend my raid array with one disk, but I made a major error. I forgot partition the new disk to utilize the full 640GB. I used the following commands to extend the array:
Code:
mdadm --add /dev/md0 /dev/sdf
mdadm --grow --raid-devices=6 /dev/md0
xfs_growfs /dev/md0
After noticing that something was wrong I used these commands to remove the new disk:
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How can I repair this situation? Before starting this adventure I made a back-up of everything that was stored in the raid array.
concerning Linux, mdadm, and creating RAID Array's in Debian. I've done a lot of reading and research on RAID both on this board and elsewhere (The Linux Documentation Project's Software-RAID HOWTO is especially good), but I've run across something that no one seems to explain, and I'm not sure why. I'm instructed to create partitions on the drives I wish to add to my array. These partitions inevitably take up the whole disk, and are always have their system IDs set to "Linux raid autodetect". What I don't understand is why, after creating these partitions, some guides then go on to create an array (say a RAID5 one) with just the disks themselves as members, while others go on to create the RAID5 array with the previously created partitions as members. E.g.,
mdadm --create --verbose /dev/md0 --level=5 --raid-devices=4 /dev/sda /dev/sdb /dev/sdc /dev/sdd
vs.
mdadm --create --verbose /dev/md0 --level=5 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
What's the advantage of using one over the other?
What is the best way to install Windows and Linux on two-hard-disk array? In fakeraid there are no problems in Win, but linux installation is almost impossible (i've tried unsuccessfully...). In software raid it would be impossible to share files between win and linux? And finally hardware raid is possible, but cheap controllers have low performance. Is there any other way (apart from spending a lot of $$ for adaptec controller) ?
View 1 Replies View RelatedI have a PC with Windows 2000 Pro installed in an NTFS partition of 60GB. My rest hard disk (500GB) is empty, no partition at all. When I run Ubuntu 10.04 installation after step number 3 I get a weird step number 4 showing prepare partitions with an empty array and no available command button at the bottom! So I can not create any partition... Also in step 4 I never see the "prepare disk space" menu. If I use a 9.04 Ubuntu CD and I try to install I get every menu fine as expected. I even tried the 10.04 CD to another PC with Windows XP PRO and the installer worked as expected for partitions.
View 1 Replies View RelatedI went to setup my linux box and found that the OS drive had finally died. It was an extremely old WD raptor drive in a hot box full of drives so it was really only a matter of time before it just quit on me. Normally this wouldn't be such a big deal however I had just recently constructed an md RAID5 array of 3 1TB disks to act as an NFS mount for basically all of my important files. Maybe 2-3 weeks before the failure I had finished moving all of my most important stuff onto that array. Now I know that the array is intact. All the required data is sitting on those disks. Since only the OS level disk failed on me I should be able to get a new disk in there, reinstall ubuntu and then rebuild that array. how exactly do I go about doing that with mdadm? Do I create the array from the /dev character devices like when I initially built the array?
View 2 Replies View RelatedI installed 10.04 on a new machine and 'tried' to create a 4 disk RAID6 array on four new 4TB drives.The build seemed to go fine, but a check on the new dev shows the following:
/dev/md0:
Version : 00.90
Creation Time : Sun May 30 21:53:11 2010
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I am using mdadm 2.6.4 for managing RAIDs on Linux kernel 2.6.18. I've a query like whenever I tried to add a new disk to a running linear array(JBOD)i get a message "cannot add new disk to this array".
The exact steps are as follows:
create a new array as:
mdadm -C /dev/md0 -llinear -n2 /dev/sata/ /dev/sata2
It is getting added and i am able to see with -D command.
Now add a new disk sata3 as follows:
mdadm --grow /dev/md0 --add /dev/sata3 I get the output as:
md: sdb has invalid sb, not importing!
md: md_import_device returned -22
mdadm: cannot add new disk to this array.
So my first doubt is whether mdadm 2.6.4 supports this features or not if it supports then do I need to change the driver?
I've googled my problem but I'm not sure I can find an answer in layman's terms. So here's my noob, simple question, please answer it in semi-noob-friendly terms I've been trying to install ubuntu for a while on my desktop pc. I gave it another go with 10.10 but I always have the same problem:
I've got two raid sets connected to an ich10r chip and they work fine in windows (2 samsung 1to + 2 raptors 75gb). Upon installation, dmraid only sets up the first raid set (Samsung array) but not the second one (Clean raptors intended for ubuntu). I don't have any other installation option, all my sata connectors are unavailable. So, is there a manual install solution? Can I force dmraid to mount the second raid set and not the first one? I think I read somewhere that this was a dmraid bug, but I can't find it anymore.
We have some servers that run in very harsh environments (research vessel) that need to have high-availability.We have software RAID 1 for some measure of resiliency, along with proper data backups (tapes etc), however we would like to be able to break out a new server and re-image it (including RAID setup) from a known good copy if the hardware completely fails on the production box. Simplicity of the process is a big plus.I am interested in any advice on the best way to approach this. My current approach (relatively new to Linux administration, totally new to MDADM) is to use DD to take a complete gzipped copy of one of the RAID'ed devices (from a live CD): ode:
dd if=/dev/sda bs=4096 | gzip -c > /mnt/external/image/test.img then reverse the process on the new PC, finally using Code:mdadm --assemble to re-create and re-build the array.
I have installed a RH on my laptop. It is a lenovo T400. I made a clone of the laptop disk through the command:
dd if=/dev/sda of=dev/sdb
I picked the copied disk and installed it on a lenovo T410
I works almost great, as all my installation was working excepting the Xwindows part.
for a while, I thought it could be related to the xorg.conf file. So I replaced my xorg.conf file by a fresh that came from a fresh installation on a T410. This did not change anything.
I guess I missed something within the X11 configuration but I can t figure out what.
I'm not sure wether this is the correct forum for this, but this is the best place I can see at the moment, so I'll give it a try. Please redirect me if I'm mistaken.Running Suse 11.2, I have a RAID-5 device mounted, and a straigt disk. I want to copy data from the straigt disk to the array, using several methods: with Dolphin, with cpio. Copying runs for some time, sometimes one or some files are copied indeed, but after a short time (sometimes half a minute, sometimes 10 minutes or more) I get a
Message from syslogd@linux-wrth at Jan 9 22:44:03 ...
kernel:[ 381.602651] Oops: 0000 [#1] PREEMPT SMP
Message from syslogd@linux-wrth at Jan 9 22:44:03 ...
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I have an SiI hardware SATA RAID card, with two 500GB disks in mirrored RAID configuration. When I first plugged them in and set it up, things seemed to work ok, but on boot the raid controller told me that the RAID needed rebuilding, and it would happen automatically after POST. So I didn't worry about it, and the drive mounted fine, and it's been that way for years. I just went in and manually on-line rebuilt the RAID in the controller's BIOS, and now when I boot into Ubuntu, both disks show up in fdisk, but neither show up in /dev/disk/by-uuid. Am I missing something?
View 9 Replies View RelatedI've been poking at the options in mdadm and dmraid for 2 hours now and don't see exactly what I need. (and trying things I'm not 100% sure of would be silly)
2 drive raid1 array. moved to another box running the same version of Ubuntu. (10.04)
I've googled and googled and can't find anyone else with this same task - what am I missing? The array is physically fine and doesn't need rebuilding, unless in this context it does somehow.
The two devices are sdb and sdc.
Output of mdadm -Es:
Code:
ARRAY /dev/md0 level=raid1 num-devices=2 UUID=97e83cac:4d76d392:e368bf24:bd0fce41
So the array is somehow visible, but I don't see what my next step needs to be.
I have an Areca hardware RAID array that I'm trying to format & partition on a fresh Ubuntu 10.04 LTS installation. The OS drive is not on the RAID card, it's entirely separate. The RAID is a 6TB volume so I realize I have to use parted to format it, not fdisk (which I've always relied on).
My problem is that I can't figure out how to get parted to like my settings. It seems like everything I try gives me the warning "Warning: The resulting partition is not properly aligned for best performance." Here's what I'm doing:
Code:
(parted) p
Model: Areca ARC-1280-VOL#00 (scsi)[code].....
What start/end settings should I use to get a properly aligned partition? How do I know?I have tried a mix and match of 0, 0s, 1, 1s, -0, -0s, -1, -1s, 100% for my start/end with no success.
There is a disk 500 gb, it is broken on /boot and on /root and on /dev/sda1 and /dev/sda2. Whether prompt it is possible to redistribute a disk without loss of data namely it is necessary to make/boot and two equivalent on disk volume.
View 3 Replies View RelatedI just restarted my server (Ubuntu 9.04 server, running on ESXi 4.0) and while copying files onto the server using samba I got strange problems and the connection was lost. When I rebooted the total system, so ESXi as well as Ubuntu Server I did find problems on my RAID disk.
The directory, where the new files were added I have a lot of files, but a lot of them do not have any info except their name:
1304 -rw-rw-rw- 1 spoorhobby spoorhobby 1327274 2010-05-15 22:10 DSCF1895.JPG
? -????????? ? ? ? ? ? DSCF1896.JPG
? -????????? ? ? ? ? ? DSCF1897.JPG
? -????????? ? ? ? ? ? DSCF1898.JPG
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Both mirror disks are still functioning and I can still add/delete files, from the server, from other LINUX systems and from other Windows systems via samba.
I did make a full backup on a different server.